zgui/src/backend_glfw_opengl.zig

47 lines
1.3 KiB
Zig

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;