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Add SDL_RenderSetVSync()

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Currently, if an application wants to toggle VSync, they'd have to tear
down the renderer and recreate it. This patch fixes that by letting
applications call SDL_RenderSetVSync().

This is the same as the patch in #3673, except it applies to all
renderers (including PSP, even thought it seems that the VSync flag is
disabled for that renderer). Furthermore, the renderer flags also change
as well, which #3673 didn't do. It is also an API instead of using hint
callbacks (which could be potentially dangerous).

Closes #3673.
This commit is contained in:
Misa
2021-03-07 15:20:45 -08:00
committed by Sam Lantinga
parent b2504b5da6
commit 4549769d7d
13 changed files with 168 additions and 0 deletions
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21
src/render/opengles2/SDL_render_gles2.c
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@@ -2012,6 +2012,26 @@ GLES2_RenderPresent(SDL_Renderer *renderer)
SDL_GL_SwapWindow(renderer->window);
}
static int
GLES2_SetVSync(SDL_Renderer * renderer, const int vsync)
{
int retval;
if (vsync) {
retval = SDL_GL_SetSwapInterval(1);
} else {
retval = SDL_GL_SetSwapInterval(0);
}
if (retval != 0) {
return retval;
}
if (SDL_GL_GetSwapInterval() > 0) {
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
} else {
renderer->info.flags &= ~SDL_RENDERER_PRESENTVSYNC;
}
return retval;
}
/*************************************************************************************************
* Bind/unbinding of textures
@@ -2197,6 +2217,7 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
renderer->RenderPresent = GLES2_RenderPresent;
renderer->DestroyTexture = GLES2_DestroyTexture;
renderer->DestroyRenderer = GLES2_DestroyRenderer;
renderer->SetVSync = GLES2_SetVSync;
renderer->GL_BindTexture = GLES2_BindTexture;
renderer->GL_UnbindTexture = GLES2_UnbindTexture;