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SDL: Set GL attributes before creating the window

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This is required as on some platforms the attributes are needed at
window creation time. For example, EGL uses some attributes like bit depths
as part of the surface (which SDL creates alongside the window),
and not the context.
This commit is contained in:
Sean Baggaley 2025-07-30 21:38:05 +01:00
parent 21c092bd80
commit fae6c725ec
2 changed files with 18 additions and 4 deletions
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11
src/Window_SDL2.c
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@ -38,6 +38,8 @@ typedef struct _WINDATA {
#endif
static void SetGLAttributes();
static void RefreshWindowBounds(void) {
SDL_GetWindowSize(win_handle, &Window_Main.Width, &Window_Main.Height);
}
@ -99,7 +101,10 @@ static void DoCreateWindow(int width, int height, int flags) {
void Window_Create2D(int width, int height) { DoCreateWindow(width, height, 0); }
#if CC_GFX_BACKEND_IS_GL()
void Window_Create3D(int width, int height) { DoCreateWindow(width, height, SDL_WINDOW_OPENGL); }
void Window_Create3D(int width, int height) {
SetGLAttributes();
DoCreateWindow(width, height, SDL_WINDOW_OPENGL);
}
#else
void Window_Create3D(int width, int height) { DoCreateWindow(width, height, 0); }
#endif
@ -537,7 +542,7 @@ void Gamepads_Process(float delta) {
#if CC_GFX_BACKEND_IS_GL()
static SDL_GLContext win_ctx;
void GLContext_Create(void) {
void SetGLAttributes(void) {
struct GraphicsMode mode;
InitGraphicsMode(&mode);
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, mode.R);
@ -553,7 +558,9 @@ void GLContext_Create(void) {
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#endif
}
void GLContext_Create(void) {
win_ctx = SDL_GL_CreateContext(win_handle);
if (!win_ctx) Window_SDLFail("creating OpenGL context");
}

11
src/Window_SDL3.c
View File

@ -11,6 +11,8 @@
static SDL_Window* win_handle;
static Uint32 dlg_event;
static void SetGLAttributes();
static void RefreshWindowBounds(void) {
SDL_GetWindowSize(win_handle, &Window_Main.Width, &Window_Main.Height);
}
@ -84,7 +86,10 @@ static void DoCreateWindow(int width, int height, int flags) {
void Window_Create2D(int width, int height) { DoCreateWindow(width, height, 0); }
#if CC_GFX_BACKEND_IS_GL()
void Window_Create3D(int width, int height) { DoCreateWindow(width, height, SDL_WINDOW_OPENGL); }
void Window_Create3D(int width, int height) {
SetGLAttributes();
DoCreateWindow(width, height, SDL_WINDOW_OPENGL);
}
#else
void Window_Create3D(int width, int height) { DoCreateWindow(width, height, 0); }
#endif
@ -567,7 +572,7 @@ void Gamepads_Process(float delta) {
#if CC_GFX_BACKEND_IS_GL()
static SDL_GLContext win_ctx;
void GLContext_Create(void) {
void SetGLAttributes(void) {
struct GraphicsMode mode;
InitGraphicsMode(&mode);
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, mode.R);
@ -583,7 +588,9 @@ void GLContext_Create(void) {
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#endif
}
void GLContext_Create(void) {
win_ctx = SDL_GL_CreateContext(win_handle);
if (!win_ctx) Window_SDLFail("creating OpenGL context");
}