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First pass on SDL render clip rect functionality

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This commit is contained in:
Sam Lantinga 2013-05-04 04:46:00 -07:00
parent 0a3ab9190b
commit 866f2e5f9e
10 changed files with 227 additions and 28 deletions
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16
src/render/opengles/SDL_render_gles.c
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@ -59,6 +59,7 @@ static void GLES_UnlockTexture(SDL_Renderer * renderer,
static int GLES_SetRenderTarget(SDL_Renderer * renderer,
SDL_Texture * texture);
static int GLES_UpdateViewport(SDL_Renderer * renderer);
static int GLES_UpdateClipRect(SDL_Renderer * renderer);
static int GLES_RenderClear(SDL_Renderer * renderer);
static int GLES_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_FPoint * points, int count);
@ -303,6 +304,7 @@ GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->UnlockTexture = GLES_UnlockTexture;
renderer->SetRenderTarget = GLES_SetRenderTarget;
renderer->UpdateViewport = GLES_UpdateViewport;
renderer->UpdateClipRect = GLES_UpdateClipRect;
renderer->RenderClear = GLES_RenderClear;
renderer->RenderDrawPoints = GLES_RenderDrawPoints;
renderer->RenderDrawLines = GLES_RenderDrawLines;
@ -630,6 +632,20 @@ GLES_UpdateViewport(SDL_Renderer * renderer)
return 0;
}
static int
GLES_UpdateClipRect(SDL_Renderer * renderer)
{
const SDL_Rect *rect = &renderer->clip_rect;
if (!SDL_RectEmpty(rect)) {
glEnable(GL_SCISSOR_TEST);
glScissor(rect->x, rect->y, rect->x + rect->w, rect->y + rect->h);
} else {
glDisable(GL_SCISSOR_TEST);
}
return 0;
}
static void
GLES_SetColor(GLES_RenderData * data, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{