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chore: implement sdl2 backend support

This commit is contained in:
Rekai Nyangadzayi Musuka 2024-02-09 01:16:29 -06:00
parent d5e0630e81
commit 1fff275f8d
7 changed files with 1479 additions and 0 deletions
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11
build.zig
View File

@ -5,6 +5,7 @@ pub const Backend = enum {
glfw_wgpu, glfw_wgpu,
glfw_opengl3, glfw_opengl3,
win32_dx12, win32_dx12,
sdl2_opengl3,
}; };
const default_options = struct { const default_options = struct {
@ -148,6 +149,16 @@ pub fn package(
.flags = &(cflags.* ++ .{"-DIMGUI_IMPL_OPENGL_LOADER_CUSTOM"}), .flags = &(cflags.* ++ .{"-DIMGUI_IMPL_OPENGL_LOADER_CUSTOM"}),
}); });
}, },
.sdl2_opengl3 => {
zgui_c_cpp.addCSourceFiles(.{
.files = &.{
thisDir() ++ "/libs/imgui/backends/imgui_impl_sdl.cpp",
thisDir() ++ "/libs/imgui/backends/imgui_impl_opengl3.cpp",
thisDir() ++ "/libs/imgui/backends/imgui_impl_opengl3_loader.h",
},
.flags = cflags,
});
},
.win32_dx12 => { .win32_dx12 => {
zgui_c_cpp.addCSourceFiles(.{ zgui_c_cpp.addCSourceFiles(.{
.files = &.{ .files = &.{

814
libs/imgui/backends/imgui_impl_opengl3_loader.h Normal file
View File

@ -0,0 +1,814 @@
//-----------------------------------------------------------------------------
// About imgui_impl_opengl3_loader.h:
//
// We embed our own OpenGL loader to not require user to provide their own or to have to use ours,
// which proved to be endless problems for users.
// Our loader is custom-generated, based on gl3w but automatically filtered to only include
// enums/functions that we use in our imgui_impl_opengl3.cpp source file in order to be small.
//
// YOU SHOULD NOT NEED TO INCLUDE/USE THIS DIRECTLY. THIS IS USED BY imgui_impl_opengl3.cpp ONLY.
// THE REST OF YOUR APP SHOULD USE A DIFFERENT GL LOADER: ANY GL LOADER OF YOUR CHOICE.
//
// IF YOU GET BUILD ERRORS IN THIS FILE (commonly macro redefinitions or function redefinitions):
// IT LIKELY MEANS THAT YOU ARE BUILDING 'imgui_impl_opengl3.cpp' OR INCUDING 'imgui_impl_opengl3_loader.h'
// IN THE SAME COMPILATION UNIT AS ONE OF YOUR FILE WHICH IS USING A THIRD-PARTY OPENGL LOADER.
// (e.g. COULD HAPPEN IF YOU ARE DOING A UNITY/JUMBO BUILD, OR INCLUDING .CPP FILES FROM OTHERS)
// YOU SHOULD NOT BUILD BOTH IN THE SAME COMPILATION UNIT.
// BUT IF YOU REALLY WANT TO, you can '#define IMGUI_IMPL_OPENGL_LOADER_CUSTOM' and imgui_impl_opengl3.cpp
// WILL NOT BE USING OUR LOADER, AND INSTEAD EXPECT ANOTHER/YOUR LOADER TO BE AVAILABLE IN THE COMPILATION UNIT.
//
// Regenerate with:
// python gl3w_gen.py --output ../imgui/backends/imgui_impl_opengl3_loader.h --ref ../imgui/backends/imgui_impl_opengl3.cpp ./extra_symbols.txt
//
// More info:
// https://github.com/dearimgui/gl3w_stripped
// https://github.com/ocornut/imgui/issues/4445
//-----------------------------------------------------------------------------
/*
* This file was generated with gl3w_gen.py, part of imgl3w
* (hosted at https://github.com/dearimgui/gl3w_stripped)
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __gl3w_h_
#define __gl3w_h_
// 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 __gl_glcorearb_h_
#define __gl_glcorearb_h_ 1
#ifdef __cplusplus
extern "C" {
#endif
/*
** Copyright 2013-2020 The Khronos Group Inc.
** SPDX-License-Identifier: MIT
**
** This header is generated from the Khronos OpenGL / OpenGL ES XML
** API Registry. The current version of the Registry, generator scripts
** used to make the header, and the header can be found at
** https://github.com/KhronosGroup/OpenGL-Registry
*/
#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
#endif
#ifndef APIENTRY
#define APIENTRY
#endif
#ifndef APIENTRYP
#define APIENTRYP APIENTRY *
#endif
#ifndef GLAPI
#define GLAPI extern
#endif
/* glcorearb.h is for use with OpenGL core profile implementations.
** It should should be placed in the same directory as gl.h and
** included as <GL/glcorearb.h>.
**
** glcorearb.h includes only APIs in the latest OpenGL core profile
** implementation together with APIs in newer ARB extensions which
** can be supported by the core profile. It does not, and never will
** include functionality removed from the core profile, such as
** fixed-function vertex and fragment processing.
**
** Do not #include both <GL/glcorearb.h> and either of <GL/gl.h> or
** <GL/glext.h> in the same source file.
*/
/* Generated C header for:
* API: gl
* Profile: core
* Versions considered: .*
* Versions emitted: .*
* Default extensions included: glcore
* Additional extensions included: _nomatch_^
* Extensions removed: _nomatch_^
*/
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glPolygonMode (GLenum face, GLenum mode);
GLAPI void APIENTRY glScissor (GLint x, GLint y, GLsizei width, GLsizei height);
GLAPI void APIENTRY glTexParameteri (GLenum target, GLenum pname, GLint param);
GLAPI void APIENTRY glTexImage2D (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void *pixels);
GLAPI void APIENTRY glClear (GLbitfield mask);
GLAPI void APIENTRY glClearColor (GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
GLAPI void APIENTRY glDisable (GLenum cap);
GLAPI void APIENTRY glEnable (GLenum cap);
GLAPI void APIENTRY glFlush (void);
GLAPI void APIENTRY glPixelStorei (GLenum pname, GLint param);
GLAPI void APIENTRY glReadPixels (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void *pixels);
GLAPI GLenum APIENTRY glGetError (void);
GLAPI void APIENTRY glGetIntegerv (GLenum pname, GLint *data);
GLAPI const GLubyte *APIENTRY glGetString (GLenum name);
GLAPI GLboolean APIENTRY glIsEnabled (GLenum cap);
GLAPI void APIENTRY glViewport (GLint x, GLint y, GLsizei width, GLsizei height);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glDrawElements (GLenum mode, GLsizei count, GLenum type, const void *indices);
GLAPI void APIENTRY glBindTexture (GLenum target, GLuint texture);
GLAPI void APIENTRY glDeleteTextures (GLsizei n, const GLuint *textures);
GLAPI void APIENTRY glGenTextures (GLsizei n, GLuint *textures);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glActiveTexture (GLenum texture);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBlendFuncSeparate (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
GLAPI void APIENTRY glBlendEquation (GLenum mode);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBindBuffer (GLenum target, GLuint buffer);
GLAPI void APIENTRY glDeleteBuffers (GLsizei n, const GLuint *buffers);
GLAPI void APIENTRY glGenBuffers (GLsizei n, GLuint *buffers);
GLAPI void APIENTRY glBufferData (GLenum target, GLsizeiptr size, const void *data, GLenum usage);
GLAPI void APIENTRY glBufferSubData (GLenum target, GLintptr offset, GLsizeiptr size, const void *data);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBlendEquationSeparate (GLenum modeRGB, GLenum modeAlpha);
GLAPI void APIENTRY glAttachShader (GLuint program, GLuint shader);
GLAPI void APIENTRY glCompileShader (GLuint shader);
GLAPI GLuint APIENTRY glCreateProgram (void);
GLAPI GLuint APIENTRY glCreateShader (GLenum type);
GLAPI void APIENTRY glDeleteProgram (GLuint program);
GLAPI void APIENTRY glDeleteShader (GLuint shader);
GLAPI void APIENTRY glDetachShader (GLuint program, GLuint shader);
GLAPI void APIENTRY glDisableVertexAttribArray (GLuint index);
GLAPI void APIENTRY glEnableVertexAttribArray (GLuint index);
GLAPI GLint APIENTRY glGetAttribLocation (GLuint program, const GLchar *name);
GLAPI void APIENTRY glGetProgramiv (GLuint program, GLenum pname, GLint *params);
GLAPI void APIENTRY glGetProgramInfoLog (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
GLAPI void APIENTRY glGetShaderiv (GLuint shader, GLenum pname, GLint *params);
GLAPI void APIENTRY glGetShaderInfoLog (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
GLAPI GLint APIENTRY glGetUniformLocation (GLuint program, const GLchar *name);
GLAPI void APIENTRY glGetVertexAttribiv (GLuint index, GLenum pname, GLint *params);
GLAPI void APIENTRY glGetVertexAttribPointerv (GLuint index, GLenum pname, void **pointer);
GLAPI GLboolean APIENTRY glIsProgram (GLuint program);
GLAPI void APIENTRY glLinkProgram (GLuint program);
GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
GLAPI void APIENTRY glUseProgram (GLuint program);
GLAPI void APIENTRY glUniform1i (GLint location, GLint v0);
GLAPI void APIENTRY glUniformMatrix4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
GLAPI void APIENTRY glVertexAttribPointer (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI const GLubyte *APIENTRY glGetStringi (GLenum name, GLuint index);
GLAPI void APIENTRY glBindVertexArray (GLuint array);
GLAPI void APIENTRY glDeleteVertexArrays (GLsizei n, const GLuint *arrays);
GLAPI void APIENTRY glGenVertexArrays (GLsizei n, GLuint *arrays);
#endif
#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;
#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
#define GL_CONTEXT_PROFILE_MASK 0x9126
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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glDrawElementsBaseVertex (GLenum mode, GLsizei count, GLenum type, const void *indices, GLint basevertex);
#endif
#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);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBindSampler (GLuint unit, GLuint sampler);
#endif
#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 */
#ifdef __cplusplus
}
#endif
#endif
#ifndef GL3W_API
#define GL3W_API
#endif
#ifndef __gl_h_
#define __gl_h_
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define GL3W_OK 0
#define GL3W_ERROR_INIT -1
#define GL3W_ERROR_LIBRARY_OPEN -2
#define GL3W_ERROR_OPENGL_VERSION -3
typedef void (*GL3WglProc)(void);
typedef GL3WglProc (*GL3WGetProcAddressProc)(const char *proc);
/* gl3w api */
GL3W_API int imgl3wInit(void);
GL3W_API int imgl3wInit2(GL3WGetProcAddressProc proc);
GL3W_API int imgl3wIsSupported(int major, int minor);
GL3W_API GL3WglProc imgl3wGetProcAddress(const char *proc);
/* gl3w internal state */
union ImGL3WProcs {
GL3WglProc ptr[59];
struct {
PFNGLACTIVETEXTUREPROC ActiveTexture;
PFNGLATTACHSHADERPROC AttachShader;
PFNGLBINDBUFFERPROC BindBuffer;
PFNGLBINDSAMPLERPROC BindSampler;
PFNGLBINDTEXTUREPROC BindTexture;
PFNGLBINDVERTEXARRAYPROC BindVertexArray;
PFNGLBLENDEQUATIONPROC BlendEquation;
PFNGLBLENDEQUATIONSEPARATEPROC BlendEquationSeparate;
PFNGLBLENDFUNCSEPARATEPROC BlendFuncSeparate;
PFNGLBUFFERDATAPROC BufferData;
PFNGLBUFFERSUBDATAPROC BufferSubData;
PFNGLCLEARPROC Clear;
PFNGLCLEARCOLORPROC ClearColor;
PFNGLCOMPILESHADERPROC CompileShader;
PFNGLCREATEPROGRAMPROC CreateProgram;
PFNGLCREATESHADERPROC CreateShader;
PFNGLDELETEBUFFERSPROC DeleteBuffers;
PFNGLDELETEPROGRAMPROC DeleteProgram;
PFNGLDELETESHADERPROC DeleteShader;
PFNGLDELETETEXTURESPROC DeleteTextures;
PFNGLDELETEVERTEXARRAYSPROC DeleteVertexArrays;
PFNGLDETACHSHADERPROC DetachShader;
PFNGLDISABLEPROC Disable;
PFNGLDISABLEVERTEXATTRIBARRAYPROC DisableVertexAttribArray;
PFNGLDRAWELEMENTSPROC DrawElements;
PFNGLDRAWELEMENTSBASEVERTEXPROC DrawElementsBaseVertex;
PFNGLENABLEPROC Enable;
PFNGLENABLEVERTEXATTRIBARRAYPROC EnableVertexAttribArray;
PFNGLFLUSHPROC Flush;
PFNGLGENBUFFERSPROC GenBuffers;
PFNGLGENTEXTURESPROC GenTextures;
PFNGLGENVERTEXARRAYSPROC GenVertexArrays;
PFNGLGETATTRIBLOCATIONPROC GetAttribLocation;
PFNGLGETERRORPROC GetError;
PFNGLGETINTEGERVPROC GetIntegerv;
PFNGLGETPROGRAMINFOLOGPROC GetProgramInfoLog;
PFNGLGETPROGRAMIVPROC GetProgramiv;
PFNGLGETSHADERINFOLOGPROC GetShaderInfoLog;
PFNGLGETSHADERIVPROC GetShaderiv;
PFNGLGETSTRINGPROC GetString;
PFNGLGETSTRINGIPROC GetStringi;
PFNGLGETUNIFORMLOCATIONPROC GetUniformLocation;
PFNGLGETVERTEXATTRIBPOINTERVPROC GetVertexAttribPointerv;
PFNGLGETVERTEXATTRIBIVPROC GetVertexAttribiv;
PFNGLISENABLEDPROC IsEnabled;
PFNGLISPROGRAMPROC IsProgram;
PFNGLLINKPROGRAMPROC LinkProgram;
PFNGLPIXELSTOREIPROC PixelStorei;
PFNGLPOLYGONMODEPROC PolygonMode;
PFNGLREADPIXELSPROC ReadPixels;
PFNGLSCISSORPROC Scissor;
PFNGLSHADERSOURCEPROC ShaderSource;
PFNGLTEXIMAGE2DPROC TexImage2D;
PFNGLTEXPARAMETERIPROC TexParameteri;
PFNGLUNIFORM1IPROC Uniform1i;
PFNGLUNIFORMMATRIX4FVPROC UniformMatrix4fv;
PFNGLUSEPROGRAMPROC UseProgram;
PFNGLVERTEXATTRIBPOINTERPROC VertexAttribPointer;
PFNGLVIEWPORTPROC Viewport;
} gl;
};
GL3W_API extern union ImGL3WProcs imgl3wProcs;
/* OpenGL functions */
#define glActiveTexture imgl3wProcs.gl.ActiveTexture
#define glAttachShader imgl3wProcs.gl.AttachShader
#define glBindBuffer imgl3wProcs.gl.BindBuffer
#define glBindSampler imgl3wProcs.gl.BindSampler
#define glBindTexture imgl3wProcs.gl.BindTexture
#define glBindVertexArray imgl3wProcs.gl.BindVertexArray
#define glBlendEquation imgl3wProcs.gl.BlendEquation
#define glBlendEquationSeparate imgl3wProcs.gl.BlendEquationSeparate
#define glBlendFuncSeparate imgl3wProcs.gl.BlendFuncSeparate
#define glBufferData imgl3wProcs.gl.BufferData
#define glBufferSubData imgl3wProcs.gl.BufferSubData
#define glClear imgl3wProcs.gl.Clear
#define glClearColor imgl3wProcs.gl.ClearColor
#define glCompileShader imgl3wProcs.gl.CompileShader
#define glCreateProgram imgl3wProcs.gl.CreateProgram
#define glCreateShader imgl3wProcs.gl.CreateShader
#define glDeleteBuffers imgl3wProcs.gl.DeleteBuffers
#define glDeleteProgram imgl3wProcs.gl.DeleteProgram
#define glDeleteShader imgl3wProcs.gl.DeleteShader
#define glDeleteTextures imgl3wProcs.gl.DeleteTextures
#define glDeleteVertexArrays imgl3wProcs.gl.DeleteVertexArrays
#define glDetachShader imgl3wProcs.gl.DetachShader
#define glDisable imgl3wProcs.gl.Disable
#define glDisableVertexAttribArray imgl3wProcs.gl.DisableVertexAttribArray
#define glDrawElements imgl3wProcs.gl.DrawElements
#define glDrawElementsBaseVertex imgl3wProcs.gl.DrawElementsBaseVertex
#define glEnable imgl3wProcs.gl.Enable
#define glEnableVertexAttribArray imgl3wProcs.gl.EnableVertexAttribArray
#define glFlush imgl3wProcs.gl.Flush
#define glGenBuffers imgl3wProcs.gl.GenBuffers
#define glGenTextures imgl3wProcs.gl.GenTextures
#define glGenVertexArrays imgl3wProcs.gl.GenVertexArrays
#define glGetAttribLocation imgl3wProcs.gl.GetAttribLocation
#define glGetError imgl3wProcs.gl.GetError
#define glGetIntegerv imgl3wProcs.gl.GetIntegerv
#define glGetProgramInfoLog imgl3wProcs.gl.GetProgramInfoLog
#define glGetProgramiv imgl3wProcs.gl.GetProgramiv
#define glGetShaderInfoLog imgl3wProcs.gl.GetShaderInfoLog
#define glGetShaderiv imgl3wProcs.gl.GetShaderiv
#define glGetString imgl3wProcs.gl.GetString
#define glGetStringi imgl3wProcs.gl.GetStringi
#define glGetUniformLocation imgl3wProcs.gl.GetUniformLocation
#define glGetVertexAttribPointerv imgl3wProcs.gl.GetVertexAttribPointerv
#define glGetVertexAttribiv imgl3wProcs.gl.GetVertexAttribiv
#define glIsEnabled imgl3wProcs.gl.IsEnabled
#define glIsProgram imgl3wProcs.gl.IsProgram
#define glLinkProgram imgl3wProcs.gl.LinkProgram
#define glPixelStorei imgl3wProcs.gl.PixelStorei
#define glPolygonMode imgl3wProcs.gl.PolygonMode
#define glReadPixels imgl3wProcs.gl.ReadPixels
#define glScissor imgl3wProcs.gl.Scissor
#define glShaderSource imgl3wProcs.gl.ShaderSource
#define glTexImage2D imgl3wProcs.gl.TexImage2D
#define glTexParameteri imgl3wProcs.gl.TexParameteri
#define glUniform1i imgl3wProcs.gl.Uniform1i
#define glUniformMatrix4fv imgl3wProcs.gl.UniformMatrix4fv
#define glUseProgram imgl3wProcs.gl.UseProgram
#define glVertexAttribPointer imgl3wProcs.gl.VertexAttribPointer
#define glViewport imgl3wProcs.gl.Viewport
#ifdef __cplusplus
}
#endif
#endif
#ifdef IMGL3W_IMPL
#ifdef __cplusplus
extern "C" {
#endif
#include <stdlib.h>
#define GL3W_ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#if defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
static HMODULE libgl;
typedef PROC(__stdcall* GL3WglGetProcAddr)(LPCSTR);
static GL3WglGetProcAddr wgl_get_proc_address;
static int open_libgl(void)
{
libgl = LoadLibraryA("opengl32.dll");
if (!libgl)
return GL3W_ERROR_LIBRARY_OPEN;
wgl_get_proc_address = (GL3WglGetProcAddr)GetProcAddress(libgl, "wglGetProcAddress");
return GL3W_OK;
}
static void close_libgl(void) { FreeLibrary(libgl); }
static GL3WglProc get_proc(const char *proc)
{
GL3WglProc res;
res = (GL3WglProc)wgl_get_proc_address(proc);
if (!res)
res = (GL3WglProc)GetProcAddress(libgl, proc);
return res;
}
#elif defined(__APPLE__)
#include <dlfcn.h>
static void *libgl;
static int open_libgl(void)
{
libgl = dlopen("/System/Library/Frameworks/OpenGL.framework/OpenGL", RTLD_LAZY | RTLD_LOCAL);
if (!libgl)
return GL3W_ERROR_LIBRARY_OPEN;
return GL3W_OK;
}
static void close_libgl(void) { dlclose(libgl); }
static GL3WglProc get_proc(const char *proc)
{
GL3WglProc res;
*(void **)(&res) = dlsym(libgl, proc);
return res;
}
#else
#include <dlfcn.h>
static void *libgl;
static GL3WglProc (*glx_get_proc_address)(const GLubyte *);
static int open_libgl(void)
{
// While most systems use libGL.so.1, NetBSD seems to use that libGL.so.3. See https://github.com/ocornut/imgui/issues/6983
libgl = dlopen("libGL.so", RTLD_LAZY | RTLD_LOCAL);
if (!libgl)
libgl = dlopen("libGL.so.1", RTLD_LAZY | RTLD_LOCAL);
if (!libgl)
libgl = dlopen("libGL.so.3", RTLD_LAZY | RTLD_LOCAL);
if (!libgl)
return GL3W_ERROR_LIBRARY_OPEN;
*(void **)(&glx_get_proc_address) = dlsym(libgl, "glXGetProcAddressARB");
return GL3W_OK;
}
static void close_libgl(void) { dlclose(libgl); }
static GL3WglProc get_proc(const char *proc)
{
GL3WglProc res;
res = glx_get_proc_address((const GLubyte *)proc);
if (!res)
*(void **)(&res) = dlsym(libgl, proc);
return res;
}
#endif
static struct { int major, minor; } version;
static int parse_version(void)
{
if (!glGetIntegerv)
return GL3W_ERROR_INIT;
glGetIntegerv(GL_MAJOR_VERSION, &version.major);
glGetIntegerv(GL_MINOR_VERSION, &version.minor);
if (version.major == 0 && version.minor == 0)
{
// Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
if (const char* gl_version = (const char*)glGetString(GL_VERSION))
sscanf(gl_version, "%d.%d", &version.major, &version.minor);
}
if (version.major < 2)
return GL3W_ERROR_OPENGL_VERSION;
return GL3W_OK;
}
static void load_procs(GL3WGetProcAddressProc proc);
int imgl3wInit(void)
{
int res = open_libgl();
if (res)
return res;
atexit(close_libgl);
return imgl3wInit2(get_proc);
}
int imgl3wInit2(GL3WGetProcAddressProc proc)
{
load_procs(proc);
return parse_version();
}
int imgl3wIsSupported(int major, int minor)
{
if (major < 2)
return 0;
if (version.major == major)
return version.minor >= minor;
return version.major >= major;
}
GL3WglProc imgl3wGetProcAddress(const char *proc) { return get_proc(proc); }
static const char *proc_names[] = {
"glActiveTexture",
"glAttachShader",
"glBindBuffer",
"glBindSampler",
"glBindTexture",
"glBindVertexArray",
"glBlendEquation",
"glBlendEquationSeparate",
"glBlendFuncSeparate",
"glBufferData",
"glBufferSubData",
"glClear",
"glClearColor",
"glCompileShader",
"glCreateProgram",
"glCreateShader",
"glDeleteBuffers",
"glDeleteProgram",
"glDeleteShader",
"glDeleteTextures",
"glDeleteVertexArrays",
"glDetachShader",
"glDisable",
"glDisableVertexAttribArray",
"glDrawElements",
"glDrawElementsBaseVertex",
"glEnable",
"glEnableVertexAttribArray",
"glFlush",
"glGenBuffers",
"glGenTextures",
"glGenVertexArrays",
"glGetAttribLocation",
"glGetError",
"glGetIntegerv",
"glGetProgramInfoLog",
"glGetProgramiv",
"glGetShaderInfoLog",
"glGetShaderiv",
"glGetString",
"glGetStringi",
"glGetUniformLocation",
"glGetVertexAttribPointerv",
"glGetVertexAttribiv",
"glIsEnabled",
"glIsProgram",
"glLinkProgram",
"glPixelStorei",
"glPolygonMode",
"glReadPixels",
"glScissor",
"glShaderSource",
"glTexImage2D",
"glTexParameteri",
"glUniform1i",
"glUniformMatrix4fv",
"glUseProgram",
"glVertexAttribPointer",
"glViewport",
};
GL3W_API union ImGL3WProcs imgl3wProcs;
static void load_procs(GL3WGetProcAddressProc proc)
{
size_t i;
for (i = 0; i < GL3W_ARRAY_SIZE(proc_names); i++)
imgl3wProcs.ptr[i] = proc(proc_names[i]);
}
#ifdef __cplusplus
}
#endif
#endif

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// dear imgui: Platform Backend for SDL2
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// (Info: SDL2 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
// (Prefer SDL 2.0.5+ for full feature support.)
// Implemented features:
// [X] Platform: Clipboard support.
// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set]
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// Missing features:
// [ ] Platform: SDL2 handling of IME under Windows appears to be broken and it explicitly disable the regular Windows IME. You can restore Windows IME by compiling SDL with SDL_DISABLE_WINDOWS_IME.
// 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)
// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
// 2022-09-26: Inputs: Disable SDL 2.0.22 new "auto capture" (SDL_HINT_MOUSE_AUTO_CAPTURE) which prevents drag and drop across windows for multi-viewport support + don't capture when drag and dropping. (#5710)
// 2022-09-26: Inputs: Renamed ImGuiKey_ModXXX introduced in 1.87 to ImGuiMod_XXX (old names still supported).
// 2022-03-22: Inputs: Fix mouse position issues when dragging outside of boundaries. SDL_CaptureMouse() erroneously still gives out LEAVE events when hovering OS decorations.
// 2022-03-22: Inputs: Added support for extra mouse buttons (SDL_BUTTON_X1/SDL_BUTTON_X2).
// 2022-02-04: Added SDL_Renderer* parameter to ImGui_ImplSDL2_InitForSDLRenderer(), so we can use SDL_GetRendererOutputSize() instead of SDL_GL_GetDrawableSize() when bound to a SDL_Renderer.
// 2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago) with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
// 2021-01-20: Inputs: calling new io.AddKeyAnalogEvent() for gamepad support, instead of writing directly to io.NavInputs[].
// 2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+).
// 2022-01-17: Inputs: always update key mods next and before key event (not in NewFrame) to fix input queue with very low framerates.
// 2022-01-12: Update mouse inputs using SDL_MOUSEMOTION/SDL_WINDOWEVENT_LEAVE + fallback to provide it when focused but not hovered/captured. More standard and will allow us to pass it to future input queue API.
// 2022-01-12: Maintain our own copy of MouseButtonsDown mask instead of using ImGui::IsAnyMouseDown() which will be obsoleted.
// 2022-01-10: Inputs: calling new io.AddKeyEvent(), io.AddKeyModsEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range.
// 2021-08-17: Calling io.AddFocusEvent() on SDL_WINDOWEVENT_FOCUS_GAINED/SDL_WINDOWEVENT_FOCUS_LOST.
// 2021-07-29: Inputs: MousePos is correctly reported when the host platform window is hovered but not focused (using SDL_GetMouseFocus() + SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, requires SDL 2.0.5+)
// 2021-06-29: *BREAKING CHANGE* Removed 'SDL_Window* window' parameter to ImGui_ImplSDL2_NewFrame() which was unnecessary.
// 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).
// 2021-03-22: Rework global mouse pos availability check listing supported platforms explicitly, effectively fixing mouse access on Raspberry Pi. (#2837, #3950)
// 2020-05-25: Misc: Report a zero display-size when window is minimized, to be consistent with other backends.
// 2020-02-20: Inputs: Fixed mapping for ImGuiKey_KeyPadEnter (using SDL_SCANCODE_KP_ENTER instead of SDL_SCANCODE_RETURN2).
// 2019-12-17: Inputs: On Wayland, use SDL_GetMouseState (because there is no global mouse state).
// 2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
// 2019-07-21: Inputs: Added mapping for ImGuiKey_KeyPadEnter.
// 2019-04-23: Inputs: Added support for SDL_GameController (if ImGuiConfigFlags_NavEnableGamepad is set by user application).
// 2019-03-12: Misc: Preserve DisplayFramebufferScale when main window is minimized.
// 2018-12-21: Inputs: Workaround for Android/iOS which don't seem to handle focus related calls.
// 2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
// 2018-11-14: Changed the signature of ImGui_ImplSDL2_ProcessEvent() to take a 'const SDL_Event*'.
// 2018-08-01: Inputs: Workaround for Emscripten which doesn't seem to handle focus related calls.
// 2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor.
// 2018-06-08: Misc: Extracted imgui_impl_sdl.cpp/.h away from the old combined SDL2+OpenGL/Vulkan examples.
// 2018-06-08: Misc: ImGui_ImplSDL2_InitForOpenGL() now takes a SDL_GLContext parameter.
// 2018-05-09: Misc: Fixed clipboard paste memory leak (we didn't call SDL_FreeMemory on the data returned by SDL_GetClipboardText).
// 2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors flag + honor ImGuiConfigFlags_NoMouseCursorChange flag.
// 2018-02-16: Inputs: Added support for mouse cursors, honoring ImGui::GetMouseCursor() value.
// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
// 2018-02-05: Misc: Using SDL_GetPerformanceCounter() instead of SDL_GetTicks() to be able to handle very high framerate (1000+ FPS).
// 2018-02-05: Inputs: Keyboard mapping is using scancodes everywhere instead of a confusing mixture of keycodes and scancodes.
// 2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
// 2018-01-19: Inputs: When available (SDL 2.0.4+) using SDL_CaptureMouse() to retrieve coordinates outside of client area when dragging. Otherwise (SDL 2.0.3 and before) testing for SDL_WINDOW_INPUT_FOCUS instead of SDL_WINDOW_MOUSE_FOCUS.
// 2018-01-18: Inputs: Added mapping for ImGuiKey_Insert.
// 2017-08-25: Inputs: MousePos set to -FLT_MAX,-FLT_MAX when mouse is unavailable/missing (instead of -1,-1).
// 2016-10-15: Misc: Added a void* user_data parameter to Clipboard function handlers.
#include "imgui.h"
#include "imgui_impl_sdl.h"
// SDL
#include <SDL.h>
#include <SDL_syswm.h>
#if defined(__APPLE__)
#include <TargetConditionals.h>
#endif
#if SDL_VERSION_ATLEAST(2,0,4) && !defined(__EMSCRIPTEN__) && !defined(__ANDROID__) && !(defined(__APPLE__) && TARGET_OS_IOS) && !defined(__amigaos4__)
#define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 1
#else
#define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 0
#endif
#define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6)
// SDL Data
struct ImGui_ImplSDL2_Data
{
SDL_Window* Window;
SDL_Renderer* Renderer;
Uint64 Time;
int MouseButtonsDown;
SDL_Cursor* MouseCursors[ImGuiMouseCursor_COUNT];
int PendingMouseLeaveFrame;
char* ClipboardTextData;
bool MouseCanUseGlobalState;
ImGui_ImplSDL2_Data() { memset((void*)this, 0, sizeof(*this)); }
};
// Backend data stored in io.BackendPlatformUserData 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.
// FIXME: multi-context support is not well tested and probably dysfunctional in this backend.
// FIXME: some shared resources (mouse cursor shape, gamepad) are mishandled when using multi-context.
static ImGui_ImplSDL2_Data* ImGui_ImplSDL2_GetBackendData()
{
return ImGui::GetCurrentContext() ? (ImGui_ImplSDL2_Data*)ImGui::GetIO().BackendPlatformUserData : nullptr;
}
// Functions
static const char* ImGui_ImplSDL2_GetClipboardText(void*)
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
if (bd->ClipboardTextData)
SDL_free(bd->ClipboardTextData);
bd->ClipboardTextData = SDL_GetClipboardText();
return bd->ClipboardTextData;
}
static void ImGui_ImplSDL2_SetClipboardText(void*, const char* text)
{
SDL_SetClipboardText(text);
}
static ImGuiKey ImGui_ImplSDL2_KeycodeToImGuiKey(int keycode)
{
switch (keycode)
{
case SDLK_TAB: return ImGuiKey_Tab;
case SDLK_LEFT: return ImGuiKey_LeftArrow;
case SDLK_RIGHT: return ImGuiKey_RightArrow;
case SDLK_UP: return ImGuiKey_UpArrow;
case SDLK_DOWN: return ImGuiKey_DownArrow;
case SDLK_PAGEUP: return ImGuiKey_PageUp;
case SDLK_PAGEDOWN: return ImGuiKey_PageDown;
case SDLK_HOME: return ImGuiKey_Home;
case SDLK_END: return ImGuiKey_End;
case SDLK_INSERT: return ImGuiKey_Insert;
case SDLK_DELETE: return ImGuiKey_Delete;
case SDLK_BACKSPACE: return ImGuiKey_Backspace;
case SDLK_SPACE: return ImGuiKey_Space;
case SDLK_RETURN: return ImGuiKey_Enter;
case SDLK_ESCAPE: return ImGuiKey_Escape;
case SDLK_QUOTE: return ImGuiKey_Apostrophe;
case SDLK_COMMA: return ImGuiKey_Comma;
case SDLK_MINUS: return ImGuiKey_Minus;
case SDLK_PERIOD: return ImGuiKey_Period;
case SDLK_SLASH: return ImGuiKey_Slash;
case SDLK_SEMICOLON: return ImGuiKey_Semicolon;
case SDLK_EQUALS: return ImGuiKey_Equal;
case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
case SDLK_BACKSLASH: return ImGuiKey_Backslash;
case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
case SDLK_BACKQUOTE: return ImGuiKey_GraveAccent;
case SDLK_CAPSLOCK: return ImGuiKey_CapsLock;
case SDLK_SCROLLLOCK: return ImGuiKey_ScrollLock;
case SDLK_NUMLOCKCLEAR: return ImGuiKey_NumLock;
case SDLK_PRINTSCREEN: return ImGuiKey_PrintScreen;
case SDLK_PAUSE: return ImGuiKey_Pause;
case SDLK_KP_0: return ImGuiKey_Keypad0;
case SDLK_KP_1: return ImGuiKey_Keypad1;
case SDLK_KP_2: return ImGuiKey_Keypad2;
case SDLK_KP_3: return ImGuiKey_Keypad3;
case SDLK_KP_4: return ImGuiKey_Keypad4;
case SDLK_KP_5: return ImGuiKey_Keypad5;
case SDLK_KP_6: return ImGuiKey_Keypad6;
case SDLK_KP_7: return ImGuiKey_Keypad7;
case SDLK_KP_8: return ImGuiKey_Keypad8;
case SDLK_KP_9: return ImGuiKey_Keypad9;
case SDLK_KP_PERIOD: return ImGuiKey_KeypadDecimal;
case SDLK_KP_DIVIDE: return ImGuiKey_KeypadDivide;
case SDLK_KP_MULTIPLY: return ImGuiKey_KeypadMultiply;
case SDLK_KP_MINUS: return ImGuiKey_KeypadSubtract;
case SDLK_KP_PLUS: return ImGuiKey_KeypadAdd;
case SDLK_KP_ENTER: return ImGuiKey_KeypadEnter;
case SDLK_KP_EQUALS: return ImGuiKey_KeypadEqual;
case SDLK_LCTRL: return ImGuiKey_LeftCtrl;
case SDLK_LSHIFT: return ImGuiKey_LeftShift;
case SDLK_LALT: return ImGuiKey_LeftAlt;
case SDLK_LGUI: return ImGuiKey_LeftSuper;
case SDLK_RCTRL: return ImGuiKey_RightCtrl;
case SDLK_RSHIFT: return ImGuiKey_RightShift;
case SDLK_RALT: return ImGuiKey_RightAlt;
case SDLK_RGUI: return ImGuiKey_RightSuper;
case SDLK_APPLICATION: return ImGuiKey_Menu;
case SDLK_0: return ImGuiKey_0;
case SDLK_1: return ImGuiKey_1;
case SDLK_2: return ImGuiKey_2;
case SDLK_3: return ImGuiKey_3;
case SDLK_4: return ImGuiKey_4;
case SDLK_5: return ImGuiKey_5;
case SDLK_6: return ImGuiKey_6;
case SDLK_7: return ImGuiKey_7;
case SDLK_8: return ImGuiKey_8;
case SDLK_9: return ImGuiKey_9;
case SDLK_a: return ImGuiKey_A;
case SDLK_b: return ImGuiKey_B;
case SDLK_c: return ImGuiKey_C;
case SDLK_d: return ImGuiKey_D;
case SDLK_e: return ImGuiKey_E;
case SDLK_f: return ImGuiKey_F;
case SDLK_g: return ImGuiKey_G;
case SDLK_h: return ImGuiKey_H;
case SDLK_i: return ImGuiKey_I;
case SDLK_j: return ImGuiKey_J;
case SDLK_k: return ImGuiKey_K;
case SDLK_l: return ImGuiKey_L;
case SDLK_m: return ImGuiKey_M;
case SDLK_n: return ImGuiKey_N;
case SDLK_o: return ImGuiKey_O;
case SDLK_p: return ImGuiKey_P;
case SDLK_q: return ImGuiKey_Q;
case SDLK_r: return ImGuiKey_R;
case SDLK_s: return ImGuiKey_S;
case SDLK_t: return ImGuiKey_T;
case SDLK_u: return ImGuiKey_U;
case SDLK_v: return ImGuiKey_V;
case SDLK_w: return ImGuiKey_W;
case SDLK_x: return ImGuiKey_X;
case SDLK_y: return ImGuiKey_Y;
case SDLK_z: return ImGuiKey_Z;
case SDLK_F1: return ImGuiKey_F1;
case SDLK_F2: return ImGuiKey_F2;
case SDLK_F3: return ImGuiKey_F3;
case SDLK_F4: return ImGuiKey_F4;
case SDLK_F5: return ImGuiKey_F5;
case SDLK_F6: return ImGuiKey_F6;
case SDLK_F7: return ImGuiKey_F7;
case SDLK_F8: return ImGuiKey_F8;
case SDLK_F9: return ImGuiKey_F9;
case SDLK_F10: return ImGuiKey_F10;
case SDLK_F11: return ImGuiKey_F11;
case SDLK_F12: return ImGuiKey_F12;
}
return ImGuiKey_None;
}
static void ImGui_ImplSDL2_UpdateKeyModifiers(SDL_Keymod sdl_key_mods)
{
ImGuiIO& io = ImGui::GetIO();
io.AddKeyEvent(ImGuiMod_Ctrl, (sdl_key_mods & KMOD_CTRL) != 0);
io.AddKeyEvent(ImGuiMod_Shift, (sdl_key_mods & KMOD_SHIFT) != 0);
io.AddKeyEvent(ImGuiMod_Alt, (sdl_key_mods & KMOD_ALT) != 0);
io.AddKeyEvent(ImGuiMod_Super, (sdl_key_mods & KMOD_GUI) != 0);
}
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
// If you have multiple SDL events and some of them are not meant to be used by dear imgui, you may need to filter events based on their windowID field.
bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
switch (event->type)
{
case SDL_MOUSEMOTION:
{
io.AddMousePosEvent((float)event->motion.x, (float)event->motion.y);
return true;
}
case SDL_MOUSEWHEEL:
{
float wheel_x = (event->wheel.x > 0) ? 1.0f : (event->wheel.x < 0) ? -1.0f : 0.0f;
float wheel_y = (event->wheel.y > 0) ? 1.0f : (event->wheel.y < 0) ? -1.0f : 0.0f;
io.AddMouseWheelEvent(wheel_x, wheel_y);
return true;
}
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
{
int mouse_button = -1;
if (event->button.button == SDL_BUTTON_LEFT) { mouse_button = 0; }
if (event->button.button == SDL_BUTTON_RIGHT) { mouse_button = 1; }
if (event->button.button == SDL_BUTTON_MIDDLE) { mouse_button = 2; }
if (event->button.button == SDL_BUTTON_X1) { mouse_button = 3; }
if (event->button.button == SDL_BUTTON_X2) { mouse_button = 4; }
if (mouse_button == -1)
break;
io.AddMouseButtonEvent(mouse_button, (event->type == SDL_MOUSEBUTTONDOWN));
bd->MouseButtonsDown = (event->type == SDL_MOUSEBUTTONDOWN) ? (bd->MouseButtonsDown | (1 << mouse_button)) : (bd->MouseButtonsDown & ~(1 << mouse_button));
return true;
}
case SDL_TEXTINPUT:
{
io.AddInputCharactersUTF8(event->text.text);
return true;
}
case SDL_KEYDOWN:
case SDL_KEYUP:
{
ImGui_ImplSDL2_UpdateKeyModifiers((SDL_Keymod)event->key.keysym.mod);
ImGuiKey key = ImGui_ImplSDL2_KeycodeToImGuiKey(event->key.keysym.sym);
io.AddKeyEvent(key, (event->type == SDL_KEYDOWN));
io.SetKeyEventNativeData(key, event->key.keysym.sym, event->key.keysym.scancode, event->key.keysym.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
return true;
}
case SDL_WINDOWEVENT:
{
// - When capturing mouse, SDL will send a bunch of conflicting LEAVE/ENTER event on every mouse move, but the final ENTER tends to be right.
// - However we won't get a correct LEAVE event for a captured window.
// - In some cases, when detaching a window from main viewport SDL may send SDL_WINDOWEVENT_ENTER one frame too late,
// causing SDL_WINDOWEVENT_LEAVE on previous frame to interrupt drag operation by clear mouse position. This is why
// we delay process the SDL_WINDOWEVENT_LEAVE events by one frame. See issue #5012 for details.
Uint8 window_event = event->window.event;
if (window_event == SDL_WINDOWEVENT_ENTER)
bd->PendingMouseLeaveFrame = 0;
if (window_event == SDL_WINDOWEVENT_LEAVE)
bd->PendingMouseLeaveFrame = ImGui::GetFrameCount() + 1;
if (window_event == SDL_WINDOWEVENT_FOCUS_GAINED)
io.AddFocusEvent(true);
else if (event->window.event == SDL_WINDOWEVENT_FOCUS_LOST)
io.AddFocusEvent(false);
return true;
}
}
return false;
}
static bool ImGui_ImplSDL2_Init(SDL_Window* window, SDL_Renderer* renderer)
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
// Check and store if we are on a SDL backend that supports global mouse position
// ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
bool mouse_can_use_global_state = false;
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
const char* sdl_backend = SDL_GetCurrentVideoDriver();
const char* global_mouse_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
for (int n = 0; n < IM_ARRAYSIZE(global_mouse_whitelist); n++)
if (strncmp(sdl_backend, global_mouse_whitelist[n], strlen(global_mouse_whitelist[n])) == 0)
mouse_can_use_global_state = true;
#endif
// Setup backend capabilities flags
ImGui_ImplSDL2_Data* bd = IM_NEW(ImGui_ImplSDL2_Data)();
io.BackendPlatformUserData = (void*)bd;
io.BackendPlatformName = "imgui_impl_sdl";
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
bd->Window = window;
bd->Renderer = renderer;
bd->MouseCanUseGlobalState = mouse_can_use_global_state;
io.SetClipboardTextFn = ImGui_ImplSDL2_SetClipboardText;
io.GetClipboardTextFn = ImGui_ImplSDL2_GetClipboardText;
io.ClipboardUserData = nullptr;
// Load mouse cursors
bd->MouseCursors[ImGuiMouseCursor_Arrow] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
bd->MouseCursors[ImGuiMouseCursor_TextInput] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
bd->MouseCursors[ImGuiMouseCursor_ResizeAll] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
bd->MouseCursors[ImGuiMouseCursor_ResizeNS] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENS);
bd->MouseCursors[ImGuiMouseCursor_ResizeEW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
bd->MouseCursors[ImGuiMouseCursor_Hand] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND);
bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NO);
// Set platform dependent data in viewport
#ifdef _WIN32
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
if (SDL_GetWindowWMInfo(window, &info))
ImGui::GetMainViewport()->PlatformHandleRaw = (void*)info.info.win.window;
#else
(void)window;
#endif
// From 2.0.5: Set SDL hint to receive mouse click events on window focus, otherwise SDL doesn't emit the event.
// Without this, when clicking to gain focus, our widgets wouldn't activate even though they showed as hovered.
// (This is unfortunately a global SDL setting, so enabling it might have a side-effect on your application.
// It is unlikely to make a difference, but if your app absolutely needs to ignore the initial on-focus click:
// you can ignore SDL_MOUSEBUTTONDOWN events coming right after a SDL_WINDOWEVENT_FOCUS_GAINED)
#ifdef SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH
SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1");
#endif
// From 2.0.22: Disable auto-capture, this is preventing drag and drop across multiple windows (see #5710)
#ifdef SDL_HINT_MOUSE_AUTO_CAPTURE
SDL_SetHint(SDL_HINT_MOUSE_AUTO_CAPTURE, "0");
#endif
return true;
}
bool ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context)
{
IM_UNUSED(sdl_gl_context); // Viewport branch will need this.
return ImGui_ImplSDL2_Init(window, nullptr);
}
bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window)
{
#if !SDL_HAS_VULKAN
IM_ASSERT(0 && "Unsupported");
#endif
return ImGui_ImplSDL2_Init(window, nullptr);
}
bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window)
{
#if !defined(_WIN32)
IM_ASSERT(0 && "Unsupported");
#endif
return ImGui_ImplSDL2_Init(window, nullptr);
}
bool ImGui_ImplSDL2_InitForMetal(SDL_Window* window)
{
return ImGui_ImplSDL2_Init(window, nullptr);
}
bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer)
{
return ImGui_ImplSDL2_Init(window, renderer);
}
void ImGui_ImplSDL2_Shutdown()
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
ImGuiIO& io = ImGui::GetIO();
if (bd->ClipboardTextData)
SDL_free(bd->ClipboardTextData);
for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
SDL_FreeCursor(bd->MouseCursors[cursor_n]);
io.BackendPlatformName = nullptr;
io.BackendPlatformUserData = nullptr;
IM_DELETE(bd);
}
static void ImGui_ImplSDL2_UpdateMouseData()
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
ImGuiIO& io = ImGui::GetIO();
// We forward mouse input when hovered or captured (via SDL_MOUSEMOTION) or when focused (below)
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
// SDL_CaptureMouse() let the OS know e.g. that our imgui drag outside the SDL window boundaries shouldn't e.g. trigger other operations outside
SDL_CaptureMouse((bd->MouseButtonsDown != 0 && ImGui::GetDragDropPayload() == nullptr) ? SDL_TRUE : SDL_FALSE);
SDL_Window* focused_window = SDL_GetKeyboardFocus();
const bool is_app_focused = (bd->Window == focused_window);
#else
const bool is_app_focused = (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_INPUT_FOCUS) != 0; // SDL 2.0.3 and non-windowed systems: single-viewport only
#endif
if (is_app_focused)
{
// (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
if (io.WantSetMousePos)
SDL_WarpMouseInWindow(bd->Window, (int)io.MousePos.x, (int)io.MousePos.y);
// (Optional) Fallback to provide mouse position when focused (SDL_MOUSEMOTION already provides this when hovered or captured)
if (bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0)
{
int window_x, window_y, mouse_x_global, mouse_y_global;
SDL_GetGlobalMouseState(&mouse_x_global, &mouse_y_global);
SDL_GetWindowPosition(bd->Window, &window_x, &window_y);
io.AddMousePosEvent((float)(mouse_x_global - window_x), (float)(mouse_y_global - window_y));
}
}
}
static void ImGui_ImplSDL2_UpdateMouseCursor()
{
ImGuiIO& io = ImGui::GetIO();
if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
return;
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None)
{
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
SDL_ShowCursor(SDL_FALSE);
}
else
{
// Show OS mouse cursor
SDL_SetCursor(bd->MouseCursors[imgui_cursor] ? bd->MouseCursors[imgui_cursor] : bd->MouseCursors[ImGuiMouseCursor_Arrow]);
SDL_ShowCursor(SDL_TRUE);
}
}
static void ImGui_ImplSDL2_UpdateGamepads()
{
ImGuiIO& io = ImGui::GetIO();
if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0) // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
return;
// Get gamepad
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
SDL_GameController* game_controller = SDL_GameControllerOpen(0);
if (!game_controller)
return;
io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
// Update gamepad inputs
#define IM_SATURATE(V) (V < 0.0f ? 0.0f : V > 1.0f ? 1.0f : V)
#define MAP_BUTTON(KEY_NO, BUTTON_NO) { io.AddKeyEvent(KEY_NO, SDL_GameControllerGetButton(game_controller, BUTTON_NO) != 0); }
#define MAP_ANALOG(KEY_NO, AXIS_NO, V0, V1) { float vn = (float)(SDL_GameControllerGetAxis(game_controller, AXIS_NO) - V0) / (float)(V1 - V0); vn = IM_SATURATE(vn); io.AddKeyAnalogEvent(KEY_NO, vn > 0.1f, vn); }
const int thumb_dead_zone = 8000; // SDL_gamecontroller.h suggests using this value.
MAP_BUTTON(ImGuiKey_GamepadStart, SDL_CONTROLLER_BUTTON_START);
MAP_BUTTON(ImGuiKey_GamepadBack, SDL_CONTROLLER_BUTTON_BACK);
MAP_BUTTON(ImGuiKey_GamepadFaceLeft, SDL_CONTROLLER_BUTTON_X); // Xbox X, PS Square
MAP_BUTTON(ImGuiKey_GamepadFaceRight, SDL_CONTROLLER_BUTTON_B); // Xbox B, PS Circle
MAP_BUTTON(ImGuiKey_GamepadFaceUp, SDL_CONTROLLER_BUTTON_Y); // Xbox Y, PS Triangle
MAP_BUTTON(ImGuiKey_GamepadFaceDown, SDL_CONTROLLER_BUTTON_A); // Xbox A, PS Cross
MAP_BUTTON(ImGuiKey_GamepadDpadLeft, SDL_CONTROLLER_BUTTON_DPAD_LEFT);
MAP_BUTTON(ImGuiKey_GamepadDpadRight, SDL_CONTROLLER_BUTTON_DPAD_RIGHT);
MAP_BUTTON(ImGuiKey_GamepadDpadUp, SDL_CONTROLLER_BUTTON_DPAD_UP);
MAP_BUTTON(ImGuiKey_GamepadDpadDown, SDL_CONTROLLER_BUTTON_DPAD_DOWN);
MAP_BUTTON(ImGuiKey_GamepadL1, SDL_CONTROLLER_BUTTON_LEFTSHOULDER);
MAP_BUTTON(ImGuiKey_GamepadR1, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER);
MAP_ANALOG(ImGuiKey_GamepadL2, SDL_CONTROLLER_AXIS_TRIGGERLEFT, 0.0f, 32767);
MAP_ANALOG(ImGuiKey_GamepadR2, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, 0.0f, 32767);
MAP_BUTTON(ImGuiKey_GamepadL3, SDL_CONTROLLER_BUTTON_LEFTSTICK);
MAP_BUTTON(ImGuiKey_GamepadR3, SDL_CONTROLLER_BUTTON_RIGHTSTICK);
MAP_ANALOG(ImGuiKey_GamepadLStickLeft, SDL_CONTROLLER_AXIS_LEFTX, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadLStickRight, SDL_CONTROLLER_AXIS_LEFTX, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiKey_GamepadLStickUp, SDL_CONTROLLER_AXIS_LEFTY, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadLStickDown, SDL_CONTROLLER_AXIS_LEFTY, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiKey_GamepadRStickLeft, SDL_CONTROLLER_AXIS_RIGHTX, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadRStickRight, SDL_CONTROLLER_AXIS_RIGHTX, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiKey_GamepadRStickUp, SDL_CONTROLLER_AXIS_RIGHTY, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadRStickDown, SDL_CONTROLLER_AXIS_RIGHTY, +thumb_dead_zone, +32767);
#undef MAP_BUTTON
#undef MAP_ANALOG
}
void ImGui_ImplSDL2_NewFrame()
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplSDL2_Init()?");
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
SDL_GetWindowSize(bd->Window, &w, &h);
if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
w = h = 0;
if (bd->Renderer != nullptr)
SDL_GetRendererOutputSize(bd->Renderer, &display_w, &display_h);
else
SDL_GL_GetDrawableSize(bd->Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h);
if (w > 0 && h > 0)
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
// Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
static Uint64 frequency = SDL_GetPerformanceFrequency();
Uint64 current_time = SDL_GetPerformanceCounter();
io.DeltaTime = bd->Time > 0 ? (float)((double)(current_time - bd->Time) / frequency) : (float)(1.0f / 60.0f);
bd->Time = current_time;
if (bd->PendingMouseLeaveFrame && bd->PendingMouseLeaveFrame >= ImGui::GetFrameCount() && bd->MouseButtonsDown == 0)
{
io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
bd->PendingMouseLeaveFrame = 0;
}
ImGui_ImplSDL2_UpdateMouseData();
ImGui_ImplSDL2_UpdateMouseCursor();
// Update game controllers (if enabled and available)
ImGui_ImplSDL2_UpdateGamepads();
}

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// dear imgui: Platform Backend for SDL2
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// (Info: SDL2 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
// Implemented features:
// [X] Platform: Clipboard support.
// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set]
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// Missing features:
// [ ] Platform: SDL2 handling of IME under Windows appears to be broken and it explicitly disable the regular Windows IME. You can restore Windows IME by compiling SDL with SDL_DISABLE_WINDOWS_IME.
// 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
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
struct SDL_Window;
struct SDL_Renderer;
typedef union SDL_Event SDL_Event;
extern "C" {
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForMetal(SDL_Window* window);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForSDLRenderer(SDL_Window* window, SDL_Renderer* renderer);
IMGUI_IMPL_API void ImGui_ImplSDL2_Shutdown();
IMGUI_IMPL_API void ImGui_ImplSDL2_NewFrame();
IMGUI_IMPL_API bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);
}
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
static inline void ImGui_ImplSDL2_NewFrame(SDL_Window*) { ImGui_ImplSDL2_NewFrame(); } // 1.84: removed unnecessary parameter
#endif

42
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const zgui = @import("gui.zig");
const SDL_GL_Context = *anyopaque;
pub fn init(window: *anyopaque, context: SDL_GL_Context, glsl_version: []const u8) void {
if (!ImGui_ImplSDL2_InitForOpenGL(window, context)) unreachable;
if (!ImGui_ImplOpenGL3_Init(glsl_version.ptr)) unreachable;
}
pub fn deinit() void {
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplSDL2_Shutdown();
}
pub fn newFrame(width: f32, height: f32) void {
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplSDL2_NewFrame();
zgui.io.setDisplaySize(width, height);
zgui.io.setDisplayFramebufferScale(1.0, 1.0);
zgui.newFrame();
}
pub fn draw() void {
zgui.render();
ImGui_ImplOpenGL3_RenderDrawData(zgui.getDrawData());
}
pub fn processEvent(event: *anyopaque) bool {
return ImGui_ImplSDL2_ProcessEvent(event);
}
extern fn ImGui_ImplSDL2_InitForOpenGL(window: *anyopaque, sdl_gl_context: SDL_GL_Context) bool;
extern fn ImGui_ImplSDL2_Shutdown() void;
extern fn ImGui_ImplSDL2_NewFrame() void;
extern fn ImGui_ImplSDL2_ProcessEvent(event: *anyopaque) bool;
extern fn ImGui_ImplOpenGL3_Init(glsl_version: [*]const u8) bool;
extern fn ImGui_ImplOpenGL3_Shutdown() void;
extern fn ImGui_ImplOpenGL3_NewFrame() void;
extern fn ImGui_ImplOpenGL3_RenderDrawData(draw_data: *anyopaque) void;

1
src/gui.zig
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@ -8,6 +8,7 @@ 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"), .glfw_opengl3 => @import("backend_glfw_opengl.zig"),
.sdl2_opengl3 => @import("backend_sdl2_opengl.zig"),
.win32_dx12 => .{}, // TODO: .win32_dx12 => .{}, // TODO:
.no_backend => .{}, .no_backend => .{},
}; };

1
src/main.zig
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@ -10,6 +10,7 @@ pub usingnamespace @import("gui.zig");
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"),
.sdl2_opengl3 => @import("backend_sdl2_opengl.zig"),
.win32_dx12 => .{}, // TODO: .win32_dx12 => .{}, // TODO:
.no_backend => .{}, .no_backend => .{},
}; };