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loongarch: Switch to software render when using LG100 series

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This commit is contained in:
yuanhecai
2025-11-10 09:36:13 +08:00
committed by Sam Lantinga
parent f36d683b61
commit c44d37b5cf
1 changed files with 42 additions and 0 deletions
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42
src/render/SDL_render.c
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@@ -29,6 +29,12 @@
#include "software/SDL_render_sw_c.h"
#include "../video/SDL_pixels_c.h"
#if defined(__loongarch__)
#if SDL_VIDEO_OPENGL
#include "SDL_opengl.h"
#endif /* SDL_VIDEO_OPENGL */
#endif
#if defined(__ANDROID__)
#include "../core/android/SDL_android.h"
#endif
@@ -954,6 +960,34 @@ static void SDL_CalculateSimulatedVSyncInterval(SDL_Renderer *renderer, SDL_Wind
}
#endif /* !SDL_RENDER_DISABLED */
#if defined(__loongarch__)
static SDL_bool SDL_CheckIntegratedGraphics()
{
SDL_Window *window = SDL_CreateWindow("OpenGL test", -32, -32, 32, 32,
SDL_WINDOW_OPENGL | SDL_WINDOW_HIDDEN);
SDL_bool has_lg100_or_lg110 = SDL_FALSE;
if (window) {
SDL_GLContext context = SDL_GL_CreateContext(window);
if (context) {
const GLubyte *(APIENTRY *glGetStringFunc)(GLenum) =
SDL_GL_GetProcAddress("glGetString");
if (glGetStringFunc) {
const char *renderer = (const char*)glGetStringFunc(GL_RENDERER);
if (renderer && (SDL_strstr(renderer, "LG110") ||
SDL_strstr(renderer, "LG100"))) {
has_lg100_or_lg110 = SDL_TRUE;
}
}
SDL_GL_DeleteContext(context);
}
SDL_DestroyWindow(window);
}
return has_lg100_or_lg110;
}
#endif
SDL_Renderer *SDL_CreateRenderer(SDL_Window *window, int index, Uint32 flags)
{
#ifndef SDL_RENDER_DISABLED
@@ -967,6 +1001,14 @@ SDL_Renderer *SDL_CreateRenderer(SDL_Window *window, int index, Uint32 flags)
Android_ActivityMutex_Lock_Running();
#endif
/* CPU acceleration runs faster than integrated graphics on Loongson at present. */
#if defined(__linux__) && defined(__loongarch__)
if (SDL_CheckIntegratedGraphics()) {
SDL_SetHint(SDL_HINT_FRAMEBUFFER_ACCELERATION, "0");
flags = SDL_RENDERER_SOFTWARE;
}
#endif
if (!window) {
SDL_InvalidParamError("window");
goto error;