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zgui
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feat: update to 51bf33b8eb3e8bf5d42f6192b49df5571923e6a0

This commit is contained in:
Rekai Nyangadzayi Musuka 2024-01-16 17:53:07 -06:00
parent ddca95a721
commit a5df40564c
10 changed files with 1582 additions and 45 deletions
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36
README.md
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@ -1,6 +1,6 @@
# zgui v1.89.6 - dear imgui bindings # zgui v1.89.6 - dear imgui bindings
Easy to use, hand-crafted API with default arguments, named parameters and Zig style text formatting. For a test application please see [here](https://github.com/michal-z/zig-gamedev/tree/main/samples/gui_test_wgpu). Easy to use, hand-crafted API with default arguments, named parameters and Zig style text formatting. [Here](https://github.com/michal-z/zig-gamedev/tree/main/samples/minimal_zgpu_zgui) is a simple sample application, and [here](https://github.com/michal-z/zig-gamedev/tree/main/samples/gui_test_wgpu) is a full one.
## Features ## Features
@ -13,7 +13,18 @@ Easy to use, hand-crafted API with default arguments, named parameters and Zig s
Copy `zgui` folder to a `libs` subdirectory of the root of your project. Copy `zgui` folder to a `libs` subdirectory of the root of your project.
To get glfw/wgpu rendering backend working also copy `zgpu`, `zglfw` and `zpool` folders (see [zgpu](https://github.com/michal-z/zig-gamedev/tree/main/libs/zgpu) for the details). Alternatively, you can provide your own rendering backend, see: [backend_glfw_wgpu.zig](src/backend_glfw_wgpu.zig) for an example. To get glfw/wgpu rendering backend working also copy `zgpu`, `zglfw`, `zpool` and `system-sdk` folders (see [zgpu](https://github.com/michal-z/zig-gamedev/tree/main/libs/zgpu) for the details). Alternatively, you can provide your own rendering backend, see: [backend_glfw_wgpu.zig](src/backend_glfw_wgpu.zig) for an example.
Next, copy [build.zig.zon](build.zig.zon) from the root of the `zig-gamedev` project to the root of your project and adjust `name` and `version` accordingly:
``` zig
.{
.name = "<your_project_name>",
.version = "<your_project_version",
// leave the rest unchanged
...
}
```
Then in your `build.zig` add: Then in your `build.zig` add:
```zig ```zig
@ -46,7 +57,28 @@ pub fn build(b: *std.Build) void {
zgpu_pkg.link(exe); zgpu_pkg.link(exe);
} }
``` ```
You may also include zgui without bundled imgui or implot:
```zig
// In build.zig
const pkg = zgui.package(b, exe.target, .ReleaseSafe, .{
.options = .{
.backend = .no_backend,
.with_imgui = false,
.with_implot = false,
},
});
const lib = pkg.zgui_c_cpp;
lib.defineCMacro("IMGUI_USER_CONFIG",
\\"../imconfig_custom.h"
);
lib.addIncludePath("lib/imgui");
```
Now in your code you may import and use `zgui`: Now in your code you may import and use `zgui`:
```zig ```zig
const zgui = @import("zgui"); const zgui = @import("zgui");

118
build.zig
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@ -1,18 +1,28 @@
const std = @import("std"); const std = @import("std");
const zglfw = @import("zglfw");
const zgpu = @import("zgpu");
pub const Backend = enum { pub const Backend = enum {
no_backend, no_backend,
glfw_wgpu, glfw_wgpu,
glfw_opengl3,
win32_dx12, win32_dx12,
}; };
const default_options = struct {
const shared = false;
const with_imgui = true;
const with_implot = true;
};
pub const Options = struct { pub const Options = struct {
backend: Backend, backend: Backend,
shared: bool = false, shared: bool = default_options.shared,
/// use bundled imgui source /// use bundled imgui source
with_imgui: bool = true, with_imgui: bool = default_options.with_imgui,
/// use bundled implot source /// use bundled implot source
with_implot: bool = true, with_implot: bool = default_options.with_implot,
}; };
pub const Package = struct { pub const Package = struct {
@ -24,6 +34,7 @@ pub const Package = struct {
pub fn link(pkg: Package, exe: *std.Build.CompileStep) void { pub fn link(pkg: Package, exe: *std.Build.CompileStep) void {
exe.linkLibrary(pkg.zgui_c_cpp); exe.linkLibrary(pkg.zgui_c_cpp);
exe.addModule("zgui", pkg.zgui); exe.addModule("zgui", pkg.zgui);
exe.addModule("zgui_options", pkg.zgui_options);
} }
}; };
@ -41,7 +52,7 @@ pub fn package(
const zgui_options = step.createModule(); const zgui_options = step.createModule();
const zgui = b.createModule(.{ const zgui = b.addModule("zgui", .{
.source_file = .{ .path = thisDir() ++ "/src/gui.zig" }, .source_file = .{ .path = thisDir() ++ "/src/gui.zig" },
.dependencies = &.{ .dependencies = &.{
.{ .name = "zgui_options", .module = zgui_options }, .{ .name = "zgui_options", .module = zgui_options },
@ -62,6 +73,10 @@ pub fn package(
lib.defineCMacro("ZGUI_API", "__declspec(dllexport)"); lib.defineCMacro("ZGUI_API", "__declspec(dllexport)");
} }
if (target.isDarwin()) {
lib.linker_allow_shlib_undefined = true;
}
break :blk lib; break :blk lib;
} else b.addStaticLibrary(.{ } else b.addStaticLibrary(.{
.name = "zgui", .name = "zgui",
@ -72,7 +87,9 @@ pub fn package(
zgui_c_cpp.addIncludePath(.{ .path = thisDir() ++ "/libs" }); zgui_c_cpp.addIncludePath(.{ .path = thisDir() ++ "/libs" });
zgui_c_cpp.addIncludePath(.{ .path = thisDir() ++ "/libs/imgui" }); zgui_c_cpp.addIncludePath(.{ .path = thisDir() ++ "/libs/imgui" });
const abi = (std.zig.system.NativeTargetInfo.detect(target) catch unreachable).target.abi;
zgui_c_cpp.linkLibC(); zgui_c_cpp.linkLibC();
if (abi != .msvc)
zgui_c_cpp.linkLibCpp(); zgui_c_cpp.linkLibCpp();
const cflags = &.{"-fno-sanitize=undefined"}; const cflags = &.{"-fno-sanitize=undefined"};
@ -83,37 +100,63 @@ pub fn package(
}); });
if (args.options.with_imgui) { if (args.options.with_imgui) {
zgui_c_cpp.addCSourceFiles(&.{ zgui_c_cpp.addCSourceFiles(.{
.files = &.{
thisDir() ++ "/libs/imgui/imgui.cpp", thisDir() ++ "/libs/imgui/imgui.cpp",
thisDir() ++ "/libs/imgui/imgui_widgets.cpp", thisDir() ++ "/libs/imgui/imgui_widgets.cpp",
thisDir() ++ "/libs/imgui/imgui_tables.cpp", thisDir() ++ "/libs/imgui/imgui_tables.cpp",
thisDir() ++ "/libs/imgui/imgui_draw.cpp", thisDir() ++ "/libs/imgui/imgui_draw.cpp",
thisDir() ++ "/libs/imgui/imgui_demo.cpp", thisDir() ++ "/libs/imgui/imgui_demo.cpp",
}, cflags); },
.flags = cflags,
});
} }
if (args.options.with_implot) { if (args.options.with_implot) {
zgui_c_cpp.addCSourceFiles(&.{ zgui_c_cpp.defineCMacro("ZGUI_IMPLOT", "1");
zgui_c_cpp.addCSourceFiles(.{
.files = &.{
thisDir() ++ "/libs/imgui/implot_demo.cpp", thisDir() ++ "/libs/imgui/implot_demo.cpp",
thisDir() ++ "/libs/imgui/implot.cpp", thisDir() ++ "/libs/imgui/implot.cpp",
thisDir() ++ "/libs/imgui/implot_items.cpp", thisDir() ++ "/libs/imgui/implot_items.cpp",
}, cflags); },
.flags = cflags,
});
} else {
zgui_c_cpp.defineCMacro("ZGUI_IMPLOT", "0");
} }
switch (args.options.backend) { switch (args.options.backend) {
.glfw_wgpu => { .glfw_wgpu => {
zgui_c_cpp.addIncludePath(.{ .path = thisDir() ++ "/../zglfw/libs/glfw/include" }); zgui_c_cpp.addIncludePath(.{ .path = zglfw.path ++ "/libs/glfw/include" });
zgui_c_cpp.addIncludePath(.{ .path = thisDir() ++ "/../zgpu/libs/dawn/include" }); zgui_c_cpp.addIncludePath(.{ .path = zgpu.path ++ "/libs/dawn/include" });
zgui_c_cpp.addCSourceFiles(&.{ zgui_c_cpp.addCSourceFiles(.{
.files = &.{
thisDir() ++ "/libs/imgui/backends/imgui_impl_glfw.cpp", thisDir() ++ "/libs/imgui/backends/imgui_impl_glfw.cpp",
thisDir() ++ "/libs/imgui/backends/imgui_impl_wgpu.cpp", thisDir() ++ "/libs/imgui/backends/imgui_impl_wgpu.cpp",
}, cflags); },
.flags = cflags,
});
},
.glfw_opengl3 => {
zgui_c_cpp.addIncludePath(.{ .path = zglfw.path ++ "/libs/glfw/include" });
zgui_c_cpp.addIncludePath(.{ .path = zgpu.path ++ "/libs/dawn/include" });
zgui_c_cpp.addCSourceFiles(.{
.files = &.{
thisDir() ++ "/libs/imgui/backends/imgui_impl_glfw.cpp",
thisDir() ++ "/libs/imgui/backends/imgui_impl_opengl3.cpp",
},
.flags = &(cflags.* ++ .{"-DIMGUI_IMPL_OPENGL_LOADER_CUSTOM"}),
});
}, },
.win32_dx12 => { .win32_dx12 => {
zgui_c_cpp.addCSourceFiles(&.{ zgui_c_cpp.addCSourceFiles(.{
.files = &.{
thisDir() ++ "/libs/imgui/backends/imgui_impl_win32.cpp", thisDir() ++ "/libs/imgui/backends/imgui_impl_win32.cpp",
thisDir() ++ "/libs/imgui/backends/imgui_impl_dx12.cpp", thisDir() ++ "/libs/imgui/backends/imgui_impl_dx12.cpp",
}, cflags); },
.flags = cflags,
});
zgui_c_cpp.linkSystemLibraryName("d3dcompiler_47"); zgui_c_cpp.linkSystemLibraryName("d3dcompiler_47");
zgui_c_cpp.linkSystemLibraryName("dwmapi"); zgui_c_cpp.linkSystemLibraryName("dwmapi");
}, },
@ -128,7 +171,52 @@ pub fn package(
}; };
} }
pub fn build(_: *std.Build) void {} pub fn build(b: *std.Build) void {
const optimize = b.standardOptimizeOption(.{});
const target = b.standardTargetOptions(.{});
_ = package(b, target, optimize, .{
.options = .{
.backend = b.option(Backend, "backend", "Select backend") orelse .no_backend,
.shared = b.option(
bool,
"shared",
"Bulid as a shared library",
) orelse default_options.shared,
.with_imgui = b.option(
bool,
"with_imgui",
"Build with bundled imgui source",
) orelse default_options.with_imgui,
.with_implot = b.option(
bool,
"with_implot",
"Build with bundled implot source",
) orelse default_options.with_implot,
},
});
const test_step = b.step("test", "Run zgui tests");
test_step.dependOn(runTests(b, optimize, target));
}
pub fn runTests(
b: *std.Build,
optimize: std.builtin.OptimizeMode,
target: std.zig.CrossTarget,
) *std.Build.Step {
const gui_tests = b.addTest(.{
.name = "gui-tests",
.root_source_file = .{ .path = thisDir() ++ "/src/gui.zig" },
.target = target,
.optimize = optimize,
});
const pkg = package(b, target, optimize, .{
.options = .{ .backend = .no_backend },
});
pkg.link(gui_tests);
return &b.addRunArtifact(gui_tests).step;
}
inline fn thisDir() []const u8 { inline fn thisDir() []const u8 {
return comptime std.fs.path.dirname(@src().file) orelse "."; return comptime std.fs.path.dirname(@src().file) orelse ".";

15
build.zig.zon Normal file
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@ -0,0 +1,15 @@
.{
.name = "zgui",
.version = "1.89.6",
.paths = .{
"build.zig",
"build.zig.zon",
"libs",
"src",
"README.md",
},
.dependencies = .{
.zglfw = .{ .path = "../zglfw" },
.zgpu = .{ .path = "../zgpu" },
},
}

947
libs/imgui/backends/imgui_impl_opengl3.cpp Normal file
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@ -0,0 +1,947 @@
// dear imgui: Renderer Backend for modern OpenGL with shaders / programmatic pipeline
// - Desktop GL: 2.x 3.x 4.x
// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
// This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
// [x] Renderer: Large meshes support (64k+ vertices) with 16-bit indices (Desktop OpenGL only).
// About WebGL/ES:
// - You need to '#define IMGUI_IMPL_OPENGL_ES2' or '#define IMGUI_IMPL_OPENGL_ES3' to use WebGL or OpenGL ES.
// - This is done automatically on iOS, Android and Emscripten targets.
// - For other targets, the define needs to be visible from the imgui_impl_opengl3.cpp compilation unit. If unsure, define globally or in imconfig.h.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2023-06-20: OpenGL: Fixed erroneous use glGetIntegerv(GL_CONTEXT_PROFILE_MASK) on contexts lower than 3.2. (#6539, #6333)
// 2023-05-09: OpenGL: Support for glBindSampler() backup/restore on ES3. (#6375)
// 2023-04-18: OpenGL: Restore front and back polygon mode separately when supported by context. (#6333)
// 2023-03-23: OpenGL: Properly restoring "no shader program bound" if it was the case prior to running the rendering function. (#6267, #6220, #6224)
// 2023-03-15: OpenGL: Fixed GL loader crash when GL_VERSION returns NULL. (#6154, #4445, #3530)
// 2023-03-06: OpenGL: Fixed restoration of a potentially deleted OpenGL program, by calling glIsProgram(). (#6220, #6224)
// 2022-11-09: OpenGL: Reverted use of glBufferSubData(), too many corruptions issues + old issues seemingly can't be reproed with Intel drivers nowadays (revert 2021-12-15 and 2022-05-23 changes).
// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
// 2022-09-27: OpenGL: Added ability to '#define IMGUI_IMPL_OPENGL_DEBUG'.
// 2022-05-23: OpenGL: Reworking 2021-12-15 "Using buffer orphaning" so it only happens on Intel GPU, seems to cause problems otherwise. (#4468, #4825, #4832, #5127).
// 2022-05-13: OpenGL: Fixed state corruption on OpenGL ES 2.0 due to not preserving GL_ELEMENT_ARRAY_BUFFER_BINDING and vertex attribute states.
// 2021-12-15: OpenGL: Using buffer orphaning + glBufferSubData(), seems to fix leaks with multi-viewports with some Intel HD drivers.
// 2021-08-23: OpenGL: Fixed ES 3.0 shader ("#version 300 es") use normal precision floats to avoid wobbly rendering at HD resolutions.
// 2021-08-19: OpenGL: Embed and use our own minimal GL loader (imgui_impl_opengl3_loader.h), removing requirement and support for third-party loader.
// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
// 2021-06-25: OpenGL: Use OES_vertex_array extension on Emscripten + backup/restore current state.
// 2021-06-21: OpenGL: Destroy individual vertex/fragment shader objects right after they are linked into the main shader.
// 2021-05-24: OpenGL: Access GL_CLIP_ORIGIN when "GL_ARB_clip_control" extension is detected, inside of just OpenGL 4.5 version.
// 2021-05-19: OpenGL: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
// 2021-04-06: OpenGL: Don't try to read GL_CLIP_ORIGIN unless we're OpenGL 4.5 or greater.
// 2021-02-18: OpenGL: Change blending equation to preserve alpha in output buffer.
// 2021-01-03: OpenGL: Backup, setup and restore GL_STENCIL_TEST state.
// 2020-10-23: OpenGL: Backup, setup and restore GL_PRIMITIVE_RESTART state.
// 2020-10-15: OpenGL: Use glGetString(GL_VERSION) instead of glGetIntegerv(GL_MAJOR_VERSION, ...) when the later returns zero (e.g. Desktop GL 2.x)
// 2020-09-17: OpenGL: Fix to avoid compiling/calling glBindSampler() on ES or pre 3.3 context which have the defines set by a loader.
// 2020-07-10: OpenGL: Added support for glad2 OpenGL loader.
// 2020-05-08: OpenGL: Made default GLSL version 150 (instead of 130) on OSX.
// 2020-04-21: OpenGL: Fixed handling of glClipControl(GL_UPPER_LEFT) by inverting projection matrix.
// 2020-04-12: OpenGL: Fixed context version check mistakenly testing for 4.0+ instead of 3.2+ to enable ImGuiBackendFlags_RendererHasVtxOffset.
// 2020-03-24: OpenGL: Added support for glbinding 2.x OpenGL loader.
// 2020-01-07: OpenGL: Added support for glbinding 3.x OpenGL loader.
// 2019-10-25: OpenGL: Using a combination of GL define and runtime GL version to decide whether to use glDrawElementsBaseVertex(). Fix building with pre-3.2 GL loaders.
// 2019-09-22: OpenGL: Detect default GL loader using __has_include compiler facility.
// 2019-09-16: OpenGL: Tweak initialization code to allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before the first NewFrame() call.
// 2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
// 2019-04-30: OpenGL: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
// 2019-03-29: OpenGL: Not calling glBindBuffer more than necessary in the render loop.
// 2019-03-15: OpenGL: Added a GL call + comments in ImGui_ImplOpenGL3_Init() to detect uninitialized GL function loaders early.
// 2019-03-03: OpenGL: Fix support for ES 2.0 (WebGL 1.0).
// 2019-02-20: OpenGL: Fix for OSX not supporting OpenGL 4.5, we don't try to read GL_CLIP_ORIGIN even if defined by the headers/loader.
// 2019-02-11: OpenGL: Projecting clipping rectangles correctly using draw_data->FramebufferScale to allow multi-viewports for retina display.
// 2019-02-01: OpenGL: Using GLSL 410 shaders for any version over 410 (e.g. 430, 450).
// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
// 2018-11-13: OpenGL: Support for GL 4.5's glClipControl(GL_UPPER_LEFT) / GL_CLIP_ORIGIN.
// 2018-08-29: OpenGL: Added support for more OpenGL loaders: glew and glad, with comments indicative that any loader can be used.
// 2018-08-09: OpenGL: Default to OpenGL ES 3 on iOS and Android. GLSL version default to "#version 300 ES".
// 2018-07-30: OpenGL: Support for GLSL 300 ES and 410 core. Fixes for Emscripten compilation.
// 2018-07-10: OpenGL: Support for more GLSL versions (based on the GLSL version string). Added error output when shaders fail to compile/link.
// 2018-06-08: Misc: Extracted imgui_impl_opengl3.cpp/.h away from the old combined GLFW/SDL+OpenGL3 examples.
// 2018-06-08: OpenGL: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
// 2018-05-25: OpenGL: Removed unnecessary backup/restore of GL_ELEMENT_ARRAY_BUFFER_BINDING since this is part of the VAO state.
// 2018-05-14: OpenGL: Making the call to glBindSampler() optional so 3.2 context won't fail if the function is a nullptr pointer.
// 2018-03-06: OpenGL: Added const char* glsl_version parameter to ImGui_ImplOpenGL3_Init() so user can override the GLSL version e.g. "#version 150".
// 2018-02-23: OpenGL: Create the VAO in the render function so the setup can more easily be used with multiple shared GL context.
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
// 2018-01-07: OpenGL: Changed GLSL shader version from 330 to 150.
// 2017-09-01: OpenGL: Save and restore current bound sampler. Save and restore current polygon mode.
// 2017-05-01: OpenGL: Fixed save and restore of current blend func state.
// 2017-05-01: OpenGL: Fixed save and restore of current GL_ACTIVE_TEXTURE.
// 2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.
// 2016-07-29: OpenGL: Explicitly setting GL_UNPACK_ROW_LENGTH to reduce issues because SDL changes it. (#752)
//----------------------------------------
// OpenGL GLSL GLSL
// version version string
//----------------------------------------
// 2.0 110 "#version 110"
// 2.1 120 "#version 120"
// 3.0 130 "#version 130"
// 3.1 140 "#version 140"
// 3.2 150 "#version 150"
// 3.3 330 "#version 330 core"
// 4.0 400 "#version 400 core"
// 4.1 410 "#version 410 core"
// 4.2 420 "#version 410 core"
// 4.3 430 "#version 430 core"
// ES 2.0 100 "#version 100" = WebGL 1.0
// ES 3.0 300 "#version 300 es" = WebGL 2.0
//----------------------------------------
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#ifndef IMGUI_DISABLE
#include "imgui.h"
#include "imgui_impl_opengl3.h"
#include <stdio.h>
#include <stdint.h> // intptr_t
#if defined(__APPLE__)
#include <TargetConditionals.h>
#endif
// Clang/GCC warnings with -Weverything
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wold-style-cast" // warning: use of old-style cast
#pragma clang diagnostic ignored "-Wsign-conversion" // warning: implicit conversion changes signedness
#pragma clang diagnostic ignored "-Wunused-macros" // warning: macro is not used
#pragma clang diagnostic ignored "-Wnonportable-system-include-path"
#pragma clang diagnostic ignored "-Wcast-function-type" // warning: cast between incompatible function types (for loader)
#endif
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas" // warning: unknown option after '#pragma GCC diagnostic' kind
#pragma GCC diagnostic ignored "-Wunknown-warning-option" // warning: unknown warning group 'xxx'
#pragma GCC diagnostic ignored "-Wcast-function-type" // warning: cast between incompatible function types (for loader)
#endif
// GL includes
#if defined(IMGUI_IMPL_OPENGL_ES2)
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
#include <OpenGLES/ES2/gl.h> // Use GL ES 2
#else
#include <GLES2/gl2.h> // Use GL ES 2
#endif
#if defined(__EMSCRIPTEN__)
#ifndef GL_GLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#endif
#include <GLES2/gl2ext.h>
#endif
#elif defined(IMGUI_IMPL_OPENGL_ES3)
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
#include <OpenGLES/ES3/gl.h> // Use GL ES 3
#else
#include <GLES3/gl3.h> // Use GL ES 3
#endif
#elif !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
// Helper libraries are often used for this purpose! Here we are using our own minimal custom loader based on gl3w.
// In the rest of your app/engine, you can use another loader of your choice (gl3w, glew, glad, glbinding, glext, glLoadGen, etc.).
// If you happen to be developing a new feature for this backend (imgui_impl_opengl3.cpp):
// - You may need to regenerate imgui_impl_opengl3_loader.h to add new symbols. See https://github.com/dearimgui/gl3w_stripped
// - You can temporarily use an unstripped version. See https://github.com/dearimgui/gl3w_stripped/releases
// Changes to this backend using new APIs should be accompanied by a regenerated stripped loader version.
#define IMGL3W_IMPL
#include "imgui_impl_opengl3_loader.h"
#else // zig-gamedev: added gl decls
extern "C" {
#include "opengl-decls.h"
}
#endif
// Vertex arrays are not supported on ES2/WebGL1 unless Emscripten which uses an extension
#ifndef IMGUI_IMPL_OPENGL_ES2
#define IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
#elif defined(__EMSCRIPTEN__)
#define IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
#define glBindVertexArray glBindVertexArrayOES
#define glGenVertexArrays glGenVertexArraysOES
#define glDeleteVertexArrays glDeleteVertexArraysOES
#define GL_VERTEX_ARRAY_BINDING GL_VERTEX_ARRAY_BINDING_OES
#endif
// Desktop GL 2.0+ has glPolygonMode() which GL ES and WebGL don't have.
#ifdef GL_POLYGON_MODE
#define IMGUI_IMPL_HAS_POLYGON_MODE
#endif
// Desktop GL 3.2+ has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_2)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
#endif
// Desktop GL 3.3+ and GL ES 3.0+ have glBindSampler()
#if !defined(IMGUI_IMPL_OPENGL_ES2) && (defined(IMGUI_IMPL_OPENGL_ES3) || defined(GL_VERSION_3_3))
#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
#endif
// Desktop GL 3.1+ has GL_PRIMITIVE_RESTART state
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_1)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
#endif
// Desktop GL use extension detection
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
#endif
// [Debugging]
//#define IMGUI_IMPL_OPENGL_DEBUG
#ifdef IMGUI_IMPL_OPENGL_DEBUG
#include <stdio.h>
#define GL_CALL(_CALL) do { _CALL; GLenum gl_err = glGetError(); if (gl_err != 0) fprintf(stderr, "GL error 0x%x returned from '%s'.\n", gl_err, #_CALL); } while (0) // Call with error check
#else
#define GL_CALL(_CALL) _CALL // Call without error check
#endif
// OpenGL Data
struct ImGui_ImplOpenGL3_Data
{
GLuint GlVersion; // Extracted at runtime using GL_MAJOR_VERSION, GL_MINOR_VERSION queries (e.g. 320 for GL 3.2)
char GlslVersionString[32]; // Specified by user or detected based on compile time GL settings.
bool GlProfileIsES2;
bool GlProfileIsES3;
bool GlProfileIsCompat;
GLint GlProfileMask;
GLuint FontTexture;
GLuint ShaderHandle;
GLint AttribLocationTex; // Uniforms location
GLint AttribLocationProjMtx;
GLuint AttribLocationVtxPos; // Vertex attributes location
GLuint AttribLocationVtxUV;
GLuint AttribLocationVtxColor;
unsigned int VboHandle, ElementsHandle;
GLsizeiptr VertexBufferSize;
GLsizeiptr IndexBufferSize;
bool HasClipOrigin;
bool UseBufferSubData;
ImGui_ImplOpenGL3_Data() { memset((void*)this, 0, sizeof(*this)); }
};
// Backend data stored in io.BackendRendererUserData to allow support for multiple Dear ImGui contexts
// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
static ImGui_ImplOpenGL3_Data* ImGui_ImplOpenGL3_GetBackendData()
{
return ImGui::GetCurrentContext() ? (ImGui_ImplOpenGL3_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
}
// OpenGL vertex attribute state (for ES 1.0 and ES 2.0 only)
#ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
struct ImGui_ImplOpenGL3_VtxAttribState
{
GLint Enabled, Size, Type, Normalized, Stride;
GLvoid* Ptr;
void GetState(GLint index)
{
glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &Enabled);
glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_SIZE, &Size);
glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_TYPE, &Type);
glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &Normalized);
glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_STRIDE, &Stride);
glGetVertexAttribPointerv(index, GL_VERTEX_ATTRIB_ARRAY_POINTER, &Ptr);
}
void SetState(GLint index)
{
glVertexAttribPointer(index, Size, Type, (GLboolean)Normalized, Stride, Ptr);
if (Enabled) glEnableVertexAttribArray(index); else glDisableVertexAttribArray(index);
}
};
#endif
// Functions
bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
// Initialize our loader
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
if (imgl3wInit() != 0)
{
fprintf(stderr, "Failed to initialize OpenGL loader!\n");
return false;
}
#endif
// Setup backend capabilities flags
ImGui_ImplOpenGL3_Data* bd = IM_NEW(ImGui_ImplOpenGL3_Data)();
io.BackendRendererUserData = (void*)bd;
io.BackendRendererName = "imgui_impl_opengl3";
// Query for GL version (e.g. 320 for GL 3.2)
#if defined(IMGUI_IMPL_OPENGL_ES2)
// GLES 2
bd->GlVersion = 200;
bd->GlProfileIsES2 = true;
#else
// Desktop or GLES 3
GLint major = 0;
GLint minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
if (major == 0 && minor == 0)
{
// Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
const char* gl_version = (const char*)glGetString(GL_VERSION);
sscanf(gl_version, "%d.%d", &major, &minor);
}
bd->GlVersion = (GLuint)(major * 100 + minor * 10);
#if defined(GL_CONTEXT_PROFILE_MASK)
if (bd->GlVersion >= 320)
glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &bd->GlProfileMask);
bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
#endif
#if defined(IMGUI_IMPL_OPENGL_ES3)
bd->GlProfileIsES3 = true;
#endif
bd->UseBufferSubData = false;
/*
// Query vendor to enable glBufferSubData kludge
#ifdef _WIN32
if (const char* vendor = (const char*)glGetString(GL_VENDOR))
if (strncmp(vendor, "Intel", 5) == 0)
bd->UseBufferSubData = true;
#endif
*/
#endif
#ifdef IMGUI_IMPL_OPENGL_DEBUG
printf("GlVersion = %d\nGlProfileIsCompat = %d\nGlProfileMask = 0x%X\nGlProfileIsES2 = %d, GlProfileIsES3 = %d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", bd->GlVersion, bd->GlProfileIsCompat, bd->GlProfileMask, bd->GlProfileIsES2, bd->GlProfileIsES3, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
#endif
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
if (bd->GlVersion >= 320)
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
#endif
// Store GLSL version string so we can refer to it later in case we recreate shaders.
// Note: GLSL version is NOT the same as GL version. Leave this to nullptr if unsure.
if (glsl_version == nullptr)
{
#if defined(IMGUI_IMPL_OPENGL_ES2)
glsl_version = "#version 100";
#elif defined(IMGUI_IMPL_OPENGL_ES3)
glsl_version = "#version 300 es";
#elif defined(__APPLE__)
glsl_version = "#version 150";
#else
glsl_version = "#version 130";
#endif
}
IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(bd->GlslVersionString));
strcpy(bd->GlslVersionString, glsl_version);
strcat(bd->GlslVersionString, "\n");
// Make an arbitrary GL call (we don't actually need the result)
// IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
GLint current_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
// Detect extensions we support
bd->HasClipOrigin = (bd->GlVersion >= 450);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
GLint num_extensions = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
for (GLint i = 0; i < num_extensions; i++)
{
const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
if (extension != nullptr && strcmp(extension, "GL_ARB_clip_control") == 0)
bd->HasClipOrigin = true;
}
#endif
return true;
}
void ImGui_ImplOpenGL3_Shutdown()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_DestroyDeviceObjects();
io.BackendRendererName = nullptr;
io.BackendRendererUserData = nullptr;
io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
IM_DELETE(bd);
}
void ImGui_ImplOpenGL3_NewFrame()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplOpenGL3_Init()?");
if (!bd->ShaderHandle)
ImGui_ImplOpenGL3_CreateDeviceObjects();
}
static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glDisable(GL_STENCIL_TEST);
glEnable(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
if (bd->GlVersion >= 310)
glDisable(GL_PRIMITIVE_RESTART);
#endif
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
#endif
// Support for GL 4.5 rarely used glClipControl(GL_UPPER_LEFT)
#if defined(GL_CLIP_ORIGIN)
bool clip_origin_lower_left = true;
if (bd->HasClipOrigin)
{
GLenum current_clip_origin = 0; glGetIntegerv(GL_CLIP_ORIGIN, (GLint*)&current_clip_origin);
if (current_clip_origin == GL_UPPER_LEFT)
clip_origin_lower_left = false;
}
#endif
// Setup viewport, orthographic projection matrix
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
GL_CALL(glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height));
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
#if defined(GL_CLIP_ORIGIN)
if (!clip_origin_lower_left) { float tmp = T; T = B; B = tmp; } // Swap top and bottom if origin is upper left
#endif
const float ortho_projection[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
{ 0.0f, 0.0f, -1.0f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.0f, 1.0f },
};
glUseProgram(bd->ShaderHandle);
glUniform1i(bd->AttribLocationTex, 0);
glUniformMatrix4fv(bd->AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 and GL ES 3.0 may set that otherwise.
#endif
(void)vertex_array_object;
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(vertex_array_object);
#endif
// Bind vertex/index buffers and setup attributes for ImDrawVert
GL_CALL(glBindBuffer(GL_ARRAY_BUFFER, bd->VboHandle));
GL_CALL(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bd->ElementsHandle));
GL_CALL(glEnableVertexAttribArray(bd->AttribLocationVtxPos));
GL_CALL(glEnableVertexAttribArray(bd->AttribLocationVtxUV));
GL_CALL(glEnableVertexAttribArray(bd->AttribLocationVtxColor));
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxPos, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos)));
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv)));
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col)));
}
// OpenGL3 Render function.
// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly.
// This is in order to be able to run within an OpenGL engine that doesn't do so.
void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
{
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
if (fb_width <= 0 || fb_height <= 0)
return;
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Backup GL state
GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
glActiveTexture(GL_TEXTURE0);
GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
GLuint last_sampler; if (bd->GlVersion >= 330 || bd->GlProfileIsES3) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
#endif
GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
// This is part of VAO on OpenGL 3.0+ and OpenGL ES 3.0+.
GLint last_element_array_buffer; glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_element_array_buffer);
ImGui_ImplOpenGL3_VtxAttribState last_vtx_attrib_state_pos; last_vtx_attrib_state_pos.GetState(bd->AttribLocationVtxPos);
ImGui_ImplOpenGL3_VtxAttribState last_vtx_attrib_state_uv; last_vtx_attrib_state_uv.GetState(bd->AttribLocationVtxUV);
ImGui_ImplOpenGL3_VtxAttribState last_vtx_attrib_state_color; last_vtx_attrib_state_color.GetState(bd->AttribLocationVtxColor);
#endif
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GLuint last_vertex_array_object; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, (GLint*)&last_vertex_array_object);
#endif
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
#endif
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
GLenum last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, (GLint*)&last_blend_src_rgb);
GLenum last_blend_dst_rgb; glGetIntegerv(GL_BLEND_DST_RGB, (GLint*)&last_blend_dst_rgb);
GLenum last_blend_src_alpha; glGetIntegerv(GL_BLEND_SRC_ALPHA, (GLint*)&last_blend_src_alpha);
GLenum last_blend_dst_alpha; glGetIntegerv(GL_BLEND_DST_ALPHA, (GLint*)&last_blend_dst_alpha);
GLenum last_blend_equation_rgb; glGetIntegerv(GL_BLEND_EQUATION_RGB, (GLint*)&last_blend_equation_rgb);
GLenum last_blend_equation_alpha; glGetIntegerv(GL_BLEND_EQUATION_ALPHA, (GLint*)&last_blend_equation_alpha);
GLboolean last_enable_blend = glIsEnabled(GL_BLEND);
GLboolean last_enable_cull_face = glIsEnabled(GL_CULL_FACE);
GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST);
GLboolean last_enable_stencil_test = glIsEnabled(GL_STENCIL_TEST);
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
GLboolean last_enable_primitive_restart = (bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
#endif
// Setup desired GL state
// Recreate the VAO every time (this is to easily allow multiple GL contexts to be rendered to. VAO are not shared among GL contexts)
// The renderer would actually work without any VAO bound, but then our VertexAttrib calls would overwrite the default one currently bound.
GLuint vertex_array_object = 0;
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GL_CALL(glGenVertexArrays(1, &vertex_array_object));
#endif
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
// Will project scissor/clipping rectangles into framebuffer space
ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
// Render command lists
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
// Upload vertex/index buffers
// - OpenGL drivers are in a very sorry state nowadays....
// During 2021 we attempted to switch from glBufferData() to orphaning+glBufferSubData() following reports
// of leaks on Intel GPU when using multi-viewports on Windows.
// - After this we kept hearing of various display corruptions issues. We started disabling on non-Intel GPU, but issues still got reported on Intel.
// - We are now back to using exclusively glBufferData(). So bd->UseBufferSubData IS ALWAYS FALSE in this code.
// We are keeping the old code path for a while in case people finding new issues may want to test the bd->UseBufferSubData path.
// - See https://github.com/ocornut/imgui/issues/4468 and please report any corruption issues.
const GLsizeiptr vtx_buffer_size = (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert);
const GLsizeiptr idx_buffer_size = (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx);
if (bd->UseBufferSubData)
{
if (bd->VertexBufferSize < vtx_buffer_size)
{
bd->VertexBufferSize = vtx_buffer_size;
GL_CALL(glBufferData(GL_ARRAY_BUFFER, bd->VertexBufferSize, nullptr, GL_STREAM_DRAW));
}
if (bd->IndexBufferSize < idx_buffer_size)
{
bd->IndexBufferSize = idx_buffer_size;
GL_CALL(glBufferData(GL_ELEMENT_ARRAY_BUFFER, bd->IndexBufferSize, nullptr, GL_STREAM_DRAW));
}
GL_CALL(glBufferSubData(GL_ARRAY_BUFFER, 0, vtx_buffer_size, (const GLvoid*)cmd_list->VtxBuffer.Data));
GL_CALL(glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, idx_buffer_size, (const GLvoid*)cmd_list->IdxBuffer.Data));
}
else
{
GL_CALL(glBufferData(GL_ARRAY_BUFFER, vtx_buffer_size, (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW));
GL_CALL(glBufferData(GL_ELEMENT_ARRAY_BUFFER, idx_buffer_size, (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW));
}
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback != nullptr)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
else
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
// Project scissor/clipping rectangles into framebuffer space
ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
continue;
// Apply scissor/clipping rectangle (Y is inverted in OpenGL)
GL_CALL(glScissor((int)clip_min.x, (int)((float)fb_height - clip_max.y), (int)(clip_max.x - clip_min.x), (int)(clip_max.y - clip_min.y)));
// Bind texture, Draw
GL_CALL(glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
if (bd->GlVersion >= 320)
GL_CALL(glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset));
else
#endif
GL_CALL(glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))));
}
}
}
// Destroy the temporary VAO
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GL_CALL(glDeleteVertexArrays(1, &vertex_array_object));
#endif
// Restore modified GL state
// This "glIsProgram()" check is required because if the program is "pending deletion" at the time of binding backup, it will have been deleted by now and will cause an OpenGL error. See #6220.
if (last_program == 0 || glIsProgram(last_program)) glUseProgram(last_program);
glBindTexture(GL_TEXTURE_2D, last_texture);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
glBindSampler(0, last_sampler);
#endif
glActiveTexture(last_active_texture);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(last_vertex_array_object);
#endif
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
#ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer);
last_vtx_attrib_state_pos.SetState(bd->AttribLocationVtxPos);
last_vtx_attrib_state_uv.SetState(bd->AttribLocationVtxUV);
last_vtx_attrib_state_color.SetState(bd->AttribLocationVtxColor);
#endif
glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);
if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE);
if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
if (last_enable_stencil_test) glEnable(GL_STENCIL_TEST); else glDisable(GL_STENCIL_TEST);
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
if (bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
#endif
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
// Desktop OpenGL 3.0 and OpenGL 3.1 had separate polygon draw modes for front-facing and back-facing faces of polygons
if (bd->GlVersion <= 310 || bd->GlProfileIsCompat)
{
glPolygonMode(GL_FRONT, (GLenum)last_polygon_mode[0]);
glPolygonMode(GL_BACK, (GLenum)last_polygon_mode[1]);
}
else
{
glPolygonMode(GL_FRONT_AND_BACK, (GLenum)last_polygon_mode[0]);
}
#endif // IMGUI_IMPL_HAS_POLYGON_MODE
glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
(void)bd; // Not all compilation paths use this
}
bool ImGui_ImplOpenGL3_CreateFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Build texture atlas
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
// Upload texture to graphics system
// (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
GLint last_texture;
GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
GL_CALL(glGenTextures(1, &bd->FontTexture));
GL_CALL(glBindTexture(GL_TEXTURE_2D, bd->FontTexture));
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
#endif
GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
// Store our identifier
io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
// Restore state
GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
return true;
}
void ImGui_ImplOpenGL3_DestroyFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
if (bd->FontTexture)
{
glDeleteTextures(1, &bd->FontTexture);
io.Fonts->SetTexID(0);
bd->FontTexture = 0;
}
}
// If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
static bool CheckShader(GLuint handle, const char* desc)
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
GLint status = 0, log_length = 0;
glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
if ((GLboolean)status == GL_FALSE)
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to compile %s! With GLSL: %s\n", desc, bd->GlslVersionString);
if (log_length > 1)
{
ImVector<char> buf;
buf.resize((int)(log_length + 1));
glGetShaderInfoLog(handle, log_length, nullptr, (GLchar*)buf.begin());
fprintf(stderr, "%s\n", buf.begin());
}
return (GLboolean)status == GL_TRUE;
}
// If you get an error please report on GitHub. You may try different GL context version or GLSL version.
static bool CheckProgram(GLuint handle, const char* desc)
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
GLint status = 0, log_length = 0;
glGetProgramiv(handle, GL_LINK_STATUS, &status);
glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
if ((GLboolean)status == GL_FALSE)
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to link %s! With GLSL %s\n", desc, bd->GlslVersionString);
if (log_length > 1)
{
ImVector<char> buf;
buf.resize((int)(log_length + 1));
glGetProgramInfoLog(handle, log_length, nullptr, (GLchar*)buf.begin());
fprintf(stderr, "%s\n", buf.begin());
}
return (GLboolean)status == GL_TRUE;
}
bool ImGui_ImplOpenGL3_CreateDeviceObjects()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Backup GL state
GLint last_texture, last_array_buffer;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GLint last_vertex_array;
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
#endif
// Parse GLSL version string
int glsl_version = 130;
sscanf(bd->GlslVersionString, "#version %d", &glsl_version);
const GLchar* vertex_shader_glsl_120 =
"uniform mat4 ProjMtx;\n"
"attribute vec2 Position;\n"
"attribute vec2 UV;\n"
"attribute vec4 Color;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_130 =
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_300_es =
"precision highp float;\n"
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"uniform mat4 ProjMtx;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_410_core =
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"uniform mat4 ProjMtx;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader_glsl_120 =
"#ifdef GL_ES\n"
" precision mediump float;\n"
"#endif\n"
"uniform sampler2D Texture;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
"}\n";
const GLchar* fragment_shader_glsl_130 =
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
"}\n";
const GLchar* fragment_shader_glsl_300_es =
"precision mediump float;\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"layout (location = 0) out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
"}\n";
const GLchar* fragment_shader_glsl_410_core =
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"uniform sampler2D Texture;\n"
"layout (location = 0) out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
"}\n";
// Select shaders matching our GLSL versions
const GLchar* vertex_shader = nullptr;
const GLchar* fragment_shader = nullptr;
if (glsl_version < 130)
{
vertex_shader = vertex_shader_glsl_120;
fragment_shader = fragment_shader_glsl_120;
}
else if (glsl_version >= 410)
{
vertex_shader = vertex_shader_glsl_410_core;
fragment_shader = fragment_shader_glsl_410_core;
}
else if (glsl_version == 300)
{
vertex_shader = vertex_shader_glsl_300_es;
fragment_shader = fragment_shader_glsl_300_es;
}
else
{
vertex_shader = vertex_shader_glsl_130;
fragment_shader = fragment_shader_glsl_130;
}
// Create shaders
const GLchar* vertex_shader_with_version[2] = { bd->GlslVersionString, vertex_shader };
GLuint vert_handle = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vert_handle, 2, vertex_shader_with_version, nullptr);
glCompileShader(vert_handle);
CheckShader(vert_handle, "vertex shader");
const GLchar* fragment_shader_with_version[2] = { bd->GlslVersionString, fragment_shader };
GLuint frag_handle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(frag_handle, 2, fragment_shader_with_version, nullptr);
glCompileShader(frag_handle);
CheckShader(frag_handle, "fragment shader");
// Link
bd->ShaderHandle = glCreateProgram();
glAttachShader(bd->ShaderHandle, vert_handle);
glAttachShader(bd->ShaderHandle, frag_handle);
glLinkProgram(bd->ShaderHandle);
CheckProgram(bd->ShaderHandle, "shader program");
glDetachShader(bd->ShaderHandle, vert_handle);
glDetachShader(bd->ShaderHandle, frag_handle);
glDeleteShader(vert_handle);
glDeleteShader(frag_handle);
bd->AttribLocationTex = glGetUniformLocation(bd->ShaderHandle, "Texture");
bd->AttribLocationProjMtx = glGetUniformLocation(bd->ShaderHandle, "ProjMtx");
bd->AttribLocationVtxPos = (GLuint)glGetAttribLocation(bd->ShaderHandle, "Position");
bd->AttribLocationVtxUV = (GLuint)glGetAttribLocation(bd->ShaderHandle, "UV");
bd->AttribLocationVtxColor = (GLuint)glGetAttribLocation(bd->ShaderHandle, "Color");
// Create buffers
glGenBuffers(1, &bd->VboHandle);
glGenBuffers(1, &bd->ElementsHandle);
ImGui_ImplOpenGL3_CreateFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(last_vertex_array);
#endif
return true;
}
void ImGui_ImplOpenGL3_DestroyDeviceObjects()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
if (bd->VboHandle) { glDeleteBuffers(1, &bd->VboHandle); bd->VboHandle = 0; }
if (bd->ElementsHandle) { glDeleteBuffers(1, &bd->ElementsHandle); bd->ElementsHandle = 0; }
if (bd->ShaderHandle) { glDeleteProgram(bd->ShaderHandle); bd->ShaderHandle = 0; }
ImGui_ImplOpenGL3_DestroyFontsTexture();
}
//-----------------------------------------------------------------------------
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
#endif // #ifndef IMGUI_DISABLE

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// dear imgui: Renderer Backend for modern OpenGL with shaders / programmatic pipeline
// - Desktop GL: 2.x 3.x 4.x
// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
// This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
// [x] Renderer: Large meshes support (64k+ vertices) with 16-bit indices (Desktop OpenGL only).
// About WebGL/ES:
// - You need to '#define IMGUI_IMPL_OPENGL_ES2' or '#define IMGUI_IMPL_OPENGL_ES3' to use WebGL or OpenGL ES.
// - This is done automatically on iOS, Android and Emscripten targets.
// - For other targets, the define needs to be visible from the imgui_impl_opengl3.cpp compilation unit. If unsure, define globally or in imconfig.h.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// About GLSL version:
// The 'glsl_version' initialization parameter should be nullptr (default) or a "#version XXX" string.
// On computer platform the GLSL version default to "#version 130". On OpenGL ES 3 platform it defaults to "#version 300 es"
// Only override if your GL version doesn't handle this GLSL version. See GLSL version table at the top of imgui_impl_opengl3.cpp.
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
#ifndef IMGUI_DISABLE
extern "C" {
// Backend API
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_Init(const char* glsl_version = nullptr);
IMGUI_IMPL_API void ImGui_ImplOpenGL3_Shutdown();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_NewFrame();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data);
// (Optional) Called by Init/NewFrame/Shutdown
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateFontsTexture();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyFontsTexture();
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateDeviceObjects();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
}
// Specific OpenGL ES versions
//#define IMGUI_IMPL_OPENGL_ES2 // Auto-detected on Emscripten
//#define IMGUI_IMPL_OPENGL_ES3 // Auto-detected on iOS/Android
// You can explicitly select GLES2 or GLES3 API by using one of the '#define IMGUI_IMPL_OPENGL_LOADER_XXX' in imconfig.h or compiler command-line.
#if !defined(IMGUI_IMPL_OPENGL_ES2) \
&& !defined(IMGUI_IMPL_OPENGL_ES3)
// Try to detect GLES on matching platforms
#if defined(__APPLE__)
#include <TargetConditionals.h>
#endif
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)) || (defined(__ANDROID__))
#define IMGUI_IMPL_OPENGL_ES3 // iOS, Android -> GL ES 3, "#version 300 es"
#elif defined(__EMSCRIPTEN__) || defined(__amigaos4__)
#define IMGUI_IMPL_OPENGL_ES2 // Emscripten -> GL ES 2, "#version 100"
#else
// Otherwise imgui_impl_opengl3_loader.h will be used.
#endif
#endif
#endif // #ifndef IMGUI_DISABLE

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// Adapted from KHR/khrplatform.h to avoid including entire file.
#ifndef __khrplatform_h_
typedef float khronos_float_t;
typedef signed char khronos_int8_t;
typedef unsigned char khronos_uint8_t;
typedef signed short int khronos_int16_t;
typedef unsigned short int khronos_uint16_t;
#ifdef _WIN64
typedef signed long long int khronos_intptr_t;
typedef signed long long int khronos_ssize_t;
#else
typedef signed long int khronos_intptr_t;
typedef signed long int khronos_ssize_t;
#endif
#if defined(_MSC_VER) && !defined(__clang__)
typedef signed __int64 khronos_int64_t;
typedef unsigned __int64 khronos_uint64_t;
#elif (defined(__clang__) || defined(__GNUC__)) && (__cplusplus < 201100)
#include <stdint.h>
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#else
typedef signed long long khronos_int64_t;
typedef unsigned long long khronos_uint64_t;
#endif
#endif // __khrplatform_h_
#ifndef APIENTRY
#define APIENTRY
#endif
#ifndef APIENTRYP
#define APIENTRYP APIENTRY *
#endif
#ifndef GLAPI
#define GLAPI extern
#endif
#ifndef GL_VERSION_1_0
typedef void GLvoid;
typedef unsigned int GLenum;
typedef khronos_float_t GLfloat;
typedef int GLint;
typedef int GLsizei;
typedef unsigned int GLbitfield;
typedef double GLdouble;
typedef unsigned int GLuint;
typedef unsigned char GLboolean;
typedef khronos_uint8_t GLubyte;
#define GL_COLOR_BUFFER_BIT 0x00004000
#define GL_FALSE 0
#define GL_TRUE 1
#define GL_TRIANGLES 0x0004
#define GL_ONE 1
#define GL_SRC_ALPHA 0x0302
#define GL_ONE_MINUS_SRC_ALPHA 0x0303
#define GL_FRONT 0x0404
#define GL_BACK 0x0405
#define GL_FRONT_AND_BACK 0x0408
#define GL_POLYGON_MODE 0x0B40
#define GL_CULL_FACE 0x0B44
#define GL_DEPTH_TEST 0x0B71
#define GL_STENCIL_TEST 0x0B90
#define GL_VIEWPORT 0x0BA2
#define GL_BLEND 0x0BE2
#define GL_SCISSOR_BOX 0x0C10
#define GL_SCISSOR_TEST 0x0C11
#define GL_UNPACK_ROW_LENGTH 0x0CF2
#define GL_PACK_ALIGNMENT 0x0D05
#define GL_TEXTURE_2D 0x0DE1
#define GL_UNSIGNED_BYTE 0x1401
#define GL_UNSIGNED_SHORT 0x1403
#define GL_UNSIGNED_INT 0x1405
#define GL_FLOAT 0x1406
#define GL_RGBA 0x1908
#define GL_FILL 0x1B02
#define GL_VENDOR 0x1F00
#define GL_RENDERER 0x1F01
#define GL_VERSION 0x1F02
#define GL_EXTENSIONS 0x1F03
#define GL_LINEAR 0x2601
#define GL_TEXTURE_MAG_FILTER 0x2800
#define GL_TEXTURE_MIN_FILTER 0x2801
typedef void (APIENTRYP PFNGLPOLYGONMODEPROC) (GLenum face, GLenum mode);
typedef void (APIENTRYP PFNGLSCISSORPROC) (GLint x, GLint y, GLsizei width, GLsizei height);
typedef void (APIENTRYP PFNGLTEXPARAMETERIPROC) (GLenum target, GLenum pname, GLint param);
typedef void (APIENTRYP PFNGLTEXIMAGE2DPROC) (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void *pixels);
typedef void (APIENTRYP PFNGLCLEARPROC) (GLbitfield mask);
typedef void (APIENTRYP PFNGLCLEARCOLORPROC) (GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
typedef void (APIENTRYP PFNGLDISABLEPROC) (GLenum cap);
typedef void (APIENTRYP PFNGLENABLEPROC) (GLenum cap);
typedef void (APIENTRYP PFNGLFLUSHPROC) (void);
typedef void (APIENTRYP PFNGLPIXELSTOREIPROC) (GLenum pname, GLint param);
typedef void (APIENTRYP PFNGLREADPIXELSPROC) (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void *pixels);
typedef GLenum (APIENTRYP PFNGLGETERRORPROC) (void);
typedef void (APIENTRYP PFNGLGETINTEGERVPROC) (GLenum pname, GLint *data);
typedef const GLubyte *(APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
typedef GLboolean (APIENTRYP PFNGLISENABLEDPROC) (GLenum cap);
typedef void (APIENTRYP PFNGLVIEWPORTPROC) (GLint x, GLint y, GLsizei width, GLsizei height);
GLAPI PFNGLPOLYGONMODEPROC glPolygonMode;
GLAPI PFNGLSCISSORPROC glScissor;
GLAPI PFNGLTEXPARAMETERIPROC glTexParameteri;
GLAPI PFNGLTEXIMAGE2DPROC glTexImage2D;
GLAPI PFNGLCLEARPROC glClear;
GLAPI PFNGLCLEARCOLORPROC glClearColor;
GLAPI PFNGLDISABLEPROC glDisable;
GLAPI PFNGLENABLEPROC glEnable;
GLAPI PFNGLFLUSHPROC glFlush;
GLAPI PFNGLPIXELSTOREIPROC glPixelStorei;
GLAPI PFNGLREADPIXELSPROC glReadPixels;
GLAPI PFNGLGETERRORPROC glGetError;
GLAPI PFNGLGETINTEGERVPROC glGetIntegerv;
GLAPI PFNGLGETSTRINGPROC glGetString;
GLAPI PFNGLISENABLEDPROC glIsEnabled;
GLAPI PFNGLVIEWPORTPROC glViewport;
#endif /* GL_VERSION_1_0 */
#ifndef GL_VERSION_1_1
typedef khronos_float_t GLclampf;
typedef double GLclampd;
#define GL_TEXTURE_BINDING_2D 0x8069
typedef void (APIENTRYP PFNGLDRAWELEMENTSPROC) (GLenum mode, GLsizei count, GLenum type, const void *indices);
typedef void (APIENTRYP PFNGLBINDTEXTUREPROC) (GLenum target, GLuint texture);
typedef void (APIENTRYP PFNGLDELETETEXTURESPROC) (GLsizei n, const GLuint *textures);
typedef void (APIENTRYP PFNGLGENTEXTURESPROC) (GLsizei n, GLuint *textures);
GLAPI PFNGLDRAWELEMENTSPROC glDrawElements;
GLAPI PFNGLBINDTEXTUREPROC glBindTexture;
GLAPI PFNGLDELETETEXTURESPROC glDeleteTextures;
GLAPI PFNGLGENTEXTURESPROC glGenTextures;
#endif /* GL_VERSION_1_1 */
#ifndef GL_VERSION_1_3
#define GL_TEXTURE0 0x84C0
#define GL_ACTIVE_TEXTURE 0x84E0
typedef void (APIENTRYP PFNGLACTIVETEXTUREPROC) (GLenum texture);
GLAPI PFNGLACTIVETEXTUREPROC glActiveTexture;
#endif /* GL_VERSION_1_3 */
#ifndef GL_VERSION_1_4
#define GL_BLEND_DST_RGB 0x80C8
#define GL_BLEND_SRC_RGB 0x80C9
#define GL_BLEND_DST_ALPHA 0x80CA
#define GL_BLEND_SRC_ALPHA 0x80CB
#define GL_FUNC_ADD 0x8006
typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
typedef void (APIENTRYP PFNGLBLENDEQUATIONPROC) (GLenum mode);
GLAPI PFNGLBLENDFUNCSEPARATEPROC glBlendFuncSeparate;
GLAPI PFNGLBLENDEQUATIONPROC glBlendEquation;
#endif /* GL_VERSION_1_4 */
#ifndef GL_VERSION_1_5
typedef khronos_ssize_t GLsizeiptr;
typedef khronos_intptr_t GLintptr;
#define GL_ARRAY_BUFFER 0x8892
#define GL_ELEMENT_ARRAY_BUFFER 0x8893
#define GL_ARRAY_BUFFER_BINDING 0x8894
#define GL_ELEMENT_ARRAY_BUFFER_BINDING 0x8895
#define GL_STREAM_DRAW 0x88E0
typedef void (APIENTRYP PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
typedef void (APIENTRYP PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
typedef void (APIENTRYP PFNGLBUFFERDATAPROC) (GLenum target, GLsizeiptr size, const void *data, GLenum usage);
typedef void (APIENTRYP PFNGLBUFFERSUBDATAPROC) (GLenum target, GLintptr offset, GLsizeiptr size, const void *data);
GLAPI PFNGLBINDBUFFERPROC glBindBuffer;
GLAPI PFNGLDELETEBUFFERSPROC glDeleteBuffers;
GLAPI PFNGLGENBUFFERSPROC glGenBuffers;
GLAPI PFNGLBUFFERDATAPROC glBufferData;
GLAPI PFNGLBUFFERSUBDATAPROC glBufferSubData;
#endif /* GL_VERSION_1_5 */
#ifndef GL_VERSION_2_0
typedef char GLchar;
typedef khronos_int16_t GLshort;
typedef khronos_int8_t GLbyte;
typedef khronos_uint16_t GLushort;
#define GL_BLEND_EQUATION_RGB 0x8009
#define GL_VERTEX_ATTRIB_ARRAY_ENABLED 0x8622
#define GL_VERTEX_ATTRIB_ARRAY_SIZE 0x8623
#define GL_VERTEX_ATTRIB_ARRAY_STRIDE 0x8624
#define GL_VERTEX_ATTRIB_ARRAY_TYPE 0x8625
#define GL_VERTEX_ATTRIB_ARRAY_POINTER 0x8645
#define GL_BLEND_EQUATION_ALPHA 0x883D
#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED 0x886A
#define GL_FRAGMENT_SHADER 0x8B30
#define GL_VERTEX_SHADER 0x8B31
#define GL_COMPILE_STATUS 0x8B81
#define GL_LINK_STATUS 0x8B82
#define GL_INFO_LOG_LENGTH 0x8B84
#define GL_CURRENT_PROGRAM 0x8B8D
#define GL_UPPER_LEFT 0x8CA2
typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEPROC) (GLenum modeRGB, GLenum modeAlpha);
typedef void (APIENTRYP PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
typedef void (APIENTRYP PFNGLCOMPILESHADERPROC) (GLuint shader);
typedef GLuint (APIENTRYP PFNGLCREATEPROGRAMPROC) (void);
typedef GLuint (APIENTRYP PFNGLCREATESHADERPROC) (GLenum type);
typedef void (APIENTRYP PFNGLDELETEPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLDELETESHADERPROC) (GLuint shader);
typedef void (APIENTRYP PFNGLDETACHSHADERPROC) (GLuint program, GLuint shader);
typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const GLchar *name);
typedef void (APIENTRYP PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
typedef void (APIENTRYP PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
typedef void (APIENTRYP PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
typedef void (APIENTRYP PFNGLGETVERTEXATTRIBIVPROC) (GLuint index, GLenum pname, GLint *params);
typedef void (APIENTRYP PFNGLGETVERTEXATTRIBPOINTERVPROC) (GLuint index, GLenum pname, void **pointer);
typedef GLboolean (APIENTRYP PFNGLISPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLLINKPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
typedef void (APIENTRYP PFNGLUSEPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer);
GLAPI PFNGLBLENDEQUATIONSEPARATEPROC glBlendEquationSeparate;
GLAPI PFNGLATTACHSHADERPROC glAttachShader;
GLAPI PFNGLCOMPILESHADERPROC glCompileShader;
GLAPI PFNGLCREATEPROGRAMPROC glCreateProgram;
GLAPI PFNGLCREATESHADERPROC glCreateShader;
GLAPI PFNGLDELETEPROGRAMPROC glDeleteProgram;
GLAPI PFNGLDELETESHADERPROC glDeleteShader;
GLAPI PFNGLDETACHSHADERPROC glDetachShader;
GLAPI PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;
GLAPI PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
GLAPI PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation;
GLAPI PFNGLGETPROGRAMIVPROC glGetProgramiv;
GLAPI PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
GLAPI PFNGLGETSHADERIVPROC glGetShaderiv;
GLAPI PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
GLAPI PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
GLAPI PFNGLGETVERTEXATTRIBIVPROC glGetVertexAttribiv;
GLAPI PFNGLGETVERTEXATTRIBPOINTERVPROC glGetVertexAttribPointerv;
GLAPI PFNGLISPROGRAMPROC glIsProgram;
GLAPI PFNGLLINKPROGRAMPROC glLinkProgram;
GLAPI PFNGLSHADERSOURCEPROC glShaderSource;
GLAPI PFNGLUSEPROGRAMPROC glUseProgram;
GLAPI PFNGLUNIFORM1IPROC glUniform1i;
GLAPI PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv;
GLAPI PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
#endif /* GL_VERSION_2_0 */
#ifndef GL_VERSION_3_0
typedef khronos_uint16_t GLhalf;
#define GL_MAJOR_VERSION 0x821B
#define GL_MINOR_VERSION 0x821C
#define GL_NUM_EXTENSIONS 0x821D
#define GL_FRAMEBUFFER_SRGB 0x8DB9
#define GL_VERTEX_ARRAY_BINDING 0x85B5
typedef void (APIENTRYP PFNGLGETBOOLEANI_VPROC) (GLenum target, GLuint index, GLboolean *data);
typedef void (APIENTRYP PFNGLGETINTEGERI_VPROC) (GLenum target, GLuint index, GLint *data);
typedef const GLubyte *(APIENTRYP PFNGLGETSTRINGIPROC) (GLenum name, GLuint index);
typedef void (APIENTRYP PFNGLBINDVERTEXARRAYPROC) (GLuint array);
typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSPROC) (GLsizei n, const GLuint *arrays);
typedef void (APIENTRYP PFNGLGENVERTEXARRAYSPROC) (GLsizei n, GLuint *arrays);
GLAPI PFNGLGETSTRINGIPROC glGetStringi;
GLAPI PFNGLBINDVERTEXARRAYPROC glBindVertexArray;
GLAPI PFNGLDELETEVERTEXARRAYSPROC glDeleteVertexArrays;
GLAPI PFNGLGENVERTEXARRAYSPROC glGenVertexArrays;
#endif /* GL_VERSION_3_0 */
#ifndef GL_VERSION_3_1
#define GL_VERSION_3_1 1
#define GL_PRIMITIVE_RESTART 0x8F9D
#endif /* GL_VERSION_3_1 */
#ifndef GL_VERSION_3_2
#define GL_VERSION_3_2 1
typedef struct __GLsync *GLsync;
typedef khronos_uint64_t GLuint64;
typedef khronos_int64_t GLint64;
typedef void (APIENTRYP PFNGLDRAWELEMENTSBASEVERTEXPROC) (GLenum mode, GLsizei count, GLenum type, const void *indices, GLint basevertex);
typedef void (APIENTRYP PFNGLGETINTEGER64I_VPROC) (GLenum target, GLuint index, GLint64 *data);
GLAPI PFNGLDRAWELEMENTSBASEVERTEXPROC glDrawElementsBaseVertex;
#endif /* GL_VERSION_3_2 */
#ifndef GL_VERSION_3_3
#define GL_VERSION_3_3 1
#define GL_SAMPLER_BINDING 0x8919
typedef void (APIENTRYP PFNGLBINDSAMPLERPROC) (GLuint unit, GLuint sampler);
GLAPI PFNGLBINDSAMPLERPROC glBindSampler;
#endif /* GL_VERSION_3_3 */
#ifndef GL_VERSION_4_1
typedef void (APIENTRYP PFNGLGETFLOATI_VPROC) (GLenum target, GLuint index, GLfloat *data);
typedef void (APIENTRYP PFNGLGETDOUBLEI_VPROC) (GLenum target, GLuint index, GLdouble *data);
#endif /* GL_VERSION_4_1 */
#ifndef GL_VERSION_4_3
typedef void (APIENTRY *GLDEBUGPROC)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
#endif /* GL_VERSION_4_3 */
#ifndef GL_VERSION_4_5
#define GL_CLIP_ORIGIN 0x935C
typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKI_VPROC) (GLuint xfb, GLenum pname, GLuint index, GLint *param);
typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKI64_VPROC) (GLuint xfb, GLenum pname, GLuint index, GLint64 *param);
#endif /* GL_VERSION_4_5 */
#ifndef GL_ARB_bindless_texture
typedef khronos_uint64_t GLuint64EXT;
#endif /* GL_ARB_bindless_texture */
#ifndef GL_ARB_cl_event
struct _cl_context;
struct _cl_event;
#endif /* GL_ARB_cl_event */
#ifndef GL_ARB_clip_control
#define GL_ARB_clip_control 1
#endif /* GL_ARB_clip_control */
#ifndef GL_ARB_debug_output
typedef void (APIENTRY *GLDEBUGPROCARB)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
#endif /* GL_ARB_debug_output */
#ifndef GL_EXT_EGL_image_storage
typedef void *GLeglImageOES;
#endif /* GL_EXT_EGL_image_storage */
#ifndef GL_EXT_direct_state_access
typedef void (APIENTRYP PFNGLGETFLOATI_VEXTPROC) (GLenum pname, GLuint index, GLfloat *params);
typedef void (APIENTRYP PFNGLGETDOUBLEI_VEXTPROC) (GLenum pname, GLuint index, GLdouble *params);
typedef void (APIENTRYP PFNGLGETPOINTERI_VEXTPROC) (GLenum pname, GLuint index, void **params);
typedef void (APIENTRYP PFNGLGETVERTEXARRAYINTEGERI_VEXTPROC) (GLuint vaobj, GLuint index, GLenum pname, GLint *param);
typedef void (APIENTRYP PFNGLGETVERTEXARRAYPOINTERI_VEXTPROC) (GLuint vaobj, GLuint index, GLenum pname, void **param);
#endif /* GL_EXT_direct_state_access */
#ifndef GL_NV_draw_vulkan_image
typedef void (APIENTRY *GLVULKANPROCNV)(void);
#endif /* GL_NV_draw_vulkan_image */
#ifndef GL_NV_gpu_shader5
typedef khronos_int64_t GLint64EXT;
#endif /* GL_NV_gpu_shader5 */
#ifndef GL_NV_vertex_buffer_unified_memory
typedef void (APIENTRYP PFNGLGETINTEGERUI64I_VNVPROC) (GLenum value, GLuint index, GLuint64EXT *result);
#endif /* GL_NV_vertex_buffer_unified_memory */

46
src/backend_glfw_opengl.zig Normal file
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@ -0,0 +1,46 @@
const gui = @import("gui.zig");
pub fn initWithGlSlVersion(
window: *const anyopaque, // zglfw.Window
glsl_version: ?[:0]const u8, // e.g. "#version 130"
) void {
if (!ImGui_ImplGlfw_InitForOpenGL(window, true)) {
unreachable;
}
ImGui_ImplOpenGL3_Init(@ptrCast(glsl_version));
}
pub fn init(
window: *const anyopaque, // zglfw.Window
) void {
initWithGlSlVersion(window, null);
}
pub fn deinit() void {
ImGui_ImplGlfw_Shutdown();
ImGui_ImplOpenGL3_Shutdown();
}
pub fn newFrame(fb_width: u32, fb_height: u32) void {
ImGui_ImplGlfw_NewFrame();
ImGui_ImplOpenGL3_NewFrame();
gui.io.setDisplaySize(@as(f32, @floatFromInt(fb_width)), @as(f32, @floatFromInt(fb_height)));
gui.io.setDisplayFramebufferScale(1.0, 1.0);
gui.newFrame();
}
pub fn draw() void {
gui.render();
ImGui_ImplOpenGL3_RenderDrawData(gui.getDrawData());
}
extern fn ImGui_ImplGlfw_InitForOpenGL(window: *const anyopaque, install_callbacks: bool) bool;
extern fn ImGui_ImplGlfw_NewFrame() void;
extern fn ImGui_ImplGlfw_Shutdown() void;
extern fn ImGui_ImplOpenGL3_Init(glsl_version: [*c]const u8) void;
extern fn ImGui_ImplOpenGL3_Shutdown() void;
extern fn ImGui_ImplOpenGL3_NewFrame() void;
extern fn ImGui_ImplOpenGL3_RenderDrawData(data: *const anyopaque) void;

36
src/gui.zig
View File

@ -4,11 +4,10 @@
// named parameters and Zig style text formatting. // named parameters and Zig style text formatting.
// //
//-------------------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------------------
pub const version = @import("std").SemanticVersion{ .major = 1, .minor = 89, .patch = 6 };
pub const plot = @import("plot.zig"); pub const plot = @import("plot.zig");
pub const backend = switch (@import("zgui_options").backend) { pub const backend = switch (@import("zgui_options").backend) {
.glfw_wgpu => @import("backend_glfw_wgpu.zig"), .glfw_wgpu => @import("backend_glfw_wgpu.zig"),
.glfw_opengl3 => @import("backend_glfw_opengl.zig"),
.win32_dx12 => .{}, // TODO: .win32_dx12 => .{}, // TODO:
.no_backend => .{}, .no_backend => .{},
}; };
@ -1476,7 +1475,7 @@ pub fn comboFromEnum(
.Enum => |e| { .Enum => |e| {
comptime var str: [:0]const u8 = ""; comptime var str: [:0]const u8 = "";
inline for (e.fields) |f| { for (e.fields) |f| {
str = str ++ f.name ++ "\x00"; str = str ++ f.name ++ "\x00";
} }
break :lbl str; break :lbl str;
@ -2703,7 +2702,7 @@ extern fn zguiSetNextItemOpen(is_open: bool, cond: Condition) void;
//-------------------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------------------
pub const SelectableFlags = packed struct(u32) { pub const SelectableFlags = packed struct(u32) {
dont_close_popups: bool = false, dont_close_popups: bool = false,
span_all_colums: bool = false, span_all_columns: bool = false,
allow_double_click: bool = false, allow_double_click: bool = false,
disabled: bool = false, disabled: bool = false,
allow_item_overlap: bool = false, allow_item_overlap: bool = false,
@ -3086,12 +3085,14 @@ pub fn colorConvertFloat3ToU32(in: [3]f32) u32 {
pub fn colorConvertRgbToHsv(r: f32, g: f32, b: f32) [3]f32 { pub fn colorConvertRgbToHsv(r: f32, g: f32, b: f32) [3]f32 {
var hsv: [3]f32 = undefined; var hsv: [3]f32 = undefined;
return zguiColorConvertRGBtoHSV(r, g, b, &hsv[0], &hsv[1], &hsv[2]); zguiColorConvertRGBtoHSV(r, g, b, &hsv[0], &hsv[1], &hsv[2]);
return hsv;
} }
pub fn colorConvertHsvToRgb(h: f32, s: f32, v: f32) [3]f32 { pub fn colorConvertHsvToRgb(h: f32, s: f32, v: f32) [3]f32 {
var rgb: [3]f32 = undefined; var rgb: [3]f32 = undefined;
return zguiColorConvertHSVtoRGB(h, s, v, &rgb[0], &rgb[1], &rgb[2]); zguiColorConvertHSVtoRGB(h, s, v, &rgb[0], &rgb[1], &rgb[2]);
return rgb;
} }
extern fn zguiColorConvertU32ToFloat4(in: u32, rgba: *[4]f32) void; extern fn zguiColorConvertU32ToFloat4(in: u32, rgba: *[4]f32) void;
@ -3465,19 +3466,32 @@ pub const DrawList = *opaque {
pub const getVertexBufferLength = zguiDrawList_GetVertexBufferLength; pub const getVertexBufferLength = zguiDrawList_GetVertexBufferLength;
extern fn zguiDrawList_GetVertexBufferLength(draw_list: DrawList) i32; extern fn zguiDrawList_GetVertexBufferLength(draw_list: DrawList) i32;
pub const getVertexBufferData = zguiDrawList_GetVertexBufferData; pub const getVertexBufferData = zguiDrawList_GetVertexBufferData;
extern fn zguiDrawList_GetVertexBufferData(draw_list: DrawList) [*]const DrawVert; extern fn zguiDrawList_GetVertexBufferData(draw_list: DrawList) [*]DrawVert;
pub fn getVertexBuffer(draw_list: DrawList) []DrawVert {
const len: usize = @intCast(draw_list.getVertexBufferLength());
return draw_list.getVertexBufferData()[0..len];
}
pub const getIndexBufferLength = zguiDrawList_GetIndexBufferLength; pub const getIndexBufferLength = zguiDrawList_GetIndexBufferLength;
extern fn zguiDrawList_GetIndexBufferLength(draw_list: DrawList) i32; extern fn zguiDrawList_GetIndexBufferLength(draw_list: DrawList) i32;
pub const getIndexBufferData = zguiDrawList_GetIndexBufferData; pub const getIndexBufferData = zguiDrawList_GetIndexBufferData;
extern fn zguiDrawList_GetIndexBufferData(draw_list: DrawList) [*]const DrawIdx; extern fn zguiDrawList_GetIndexBufferData(draw_list: DrawList) [*]DrawIdx;
pub fn getIndexBuffer(draw_list: DrawList) []DrawIdx {
const len: usize = @intCast(draw_list.getIndexBufferLength());
return draw_list.getIndexBufferData()[0..len];
}
pub const getCurrentIndex = zguiDrawList_GetCurrentIndex; pub const getCurrentIndex = zguiDrawList_GetCurrentIndex;
extern fn zguiDrawList_GetCurrentIndex(draw_list: DrawList) u32; extern fn zguiDrawList_GetCurrentIndex(draw_list: DrawList) u32;
pub const getCmdBufferLength = zguiDrawList_GetCmdBufferLength; pub const getCmdBufferLength = zguiDrawList_GetCmdBufferLength;
extern fn zguiDrawList_GetCmdBufferLength(draw_list: DrawList) i32; extern fn zguiDrawList_GetCmdBufferLength(draw_list: DrawList) i32;
pub const getCmdBufferData = zguiDrawList_GetCmdBufferData; pub const getCmdBufferData = zguiDrawList_GetCmdBufferData;
extern fn zguiDrawList_GetCmdBufferData(draw_list: DrawList) [*]const DrawCmd; extern fn zguiDrawList_GetCmdBufferData(draw_list: DrawList) [*]DrawCmd;
pub fn getCmdBuffer(draw_list: DrawList) []DrawCmd {
const len: usize = @intCast(draw_list.getCmdBufferLength());
return draw_list.getCmdBufferData()[0..len];
}
pub const DrawListFlags = packed struct(u32) { pub const DrawListFlags = packed struct(u32) {
anti_aliased_lines: bool = false, anti_aliased_lines: bool = false,
@ -4223,3 +4237,7 @@ pub const DrawList = *opaque {
} }
extern fn zguiDrawList_AddResetRenderStateCallback(draw_list: DrawList) void; extern fn zguiDrawList_AddResetRenderStateCallback(draw_list: DrawList) void;
}; };
test {
std.testing.refAllDeclsRecursive(@This());
}

8
src/plot.zig
View File

@ -574,17 +574,17 @@ const PlotText = struct {
pix_offset: [2]f32 = .{ 0, 0 }, pix_offset: [2]f32 = .{ 0, 0 },
flags: PlotTextFlags = .{}, flags: PlotTextFlags = .{},
}; };
pub fn plotText(text: [*:0]const u8, args:PlotText) void { pub fn plotText(text: [*:0]const u8, args: PlotText) void {
zguiPlot_PlotText(text, args.x, args.y, &args.pix_offset, args.flags); zguiPlot_PlotText(text, args.x, args.y, &args.pix_offset, args.flags);
} }
extern fn zguiPlot_PlotText( extern fn zguiPlot_PlotText(
text:[*:0]const u8, text: [*:0]const u8,
x:f64, y:f64, x: f64,
y: f64,
pix_offset: *const [2]f32, pix_offset: *const [2]f32,
flags: PlotTextFlags, flags: PlotTextFlags,
) void; ) void;
//---------------------------------------------------------------------------------------------- //----------------------------------------------------------------------------------------------
/// `pub fn showDemoWindow(popen: ?*bool) void` /// `pub fn showDemoWindow(popen: ?*bool) void`
pub const showDemoWindow = zguiPlot_ShowDemoWindow; pub const showDemoWindow = zguiPlot_ShowDemoWindow;

10
src/zgui.cpp
View File

@ -1,5 +1,8 @@
#include "./imgui/imgui.h" #include "imgui.h"
#include "./imgui/implot.h"
#if ZGUI_IMPLOT
#include "implot.h"
#endif
#ifndef ZGUI_API #ifndef ZGUI_API
#define ZGUI_API #define ZGUI_API
@ -2155,6 +2158,8 @@ ZGUI_API void zguiViewport_GetWorkSize(ImGuiViewport* viewport, float p[2]) {
p[0] = sz.x; p[0] = sz.x;
p[1] = sz.y; p[1] = sz.y;
} }
#if ZGUI_IMPLOT
//-------------------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------------------
// //
// ImPlot // ImPlot
@ -2415,6 +2420,7 @@ ZGUI_API void zguiPlot_PlotText(
const ImVec2 p(pix_offset[0], pix_offset[1]); const ImVec2 p(pix_offset[0], pix_offset[1]);
ImPlot::PlotText(text, x, y, p, flags); ImPlot::PlotText(text, x, y, p, flags);
} }
#endif /* #ifdef ZGUI_IMPLOT */
//-------------------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------------------
} /* extern "C" */ } /* extern "C" */