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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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21
src/render/opengles2/SDL_render_gles2.c
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@ -275,6 +275,20 @@ GLES2_UpdateViewport(SDL_Renderer * renderer)
return 0;
}
static int
GLES2_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
GLES2_DestroyRenderer(SDL_Renderer *renderer)
{
@ -934,11 +948,11 @@ static int GLES2_RenderDrawLines(SDL_Renderer *renderer, const SDL_FPoint *point
static int GLES2_RenderFillRects(SDL_Renderer *renderer, const SDL_FRect *rects, int count);
static int GLES2_RenderCopy(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *srcrect,
const SDL_FRect *dstrect);
static int GLES2_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch);
static int GLES2_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect,
const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip);
static int GLES2_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch);
static void GLES2_RenderPresent(SDL_Renderer *renderer);
@ -1708,13 +1722,14 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
renderer->UnlockTexture = &GLES2_UnlockTexture;
renderer->SetRenderTarget = &GLES2_SetRenderTarget;
renderer->UpdateViewport = &GLES2_UpdateViewport;
renderer->UpdateClipRect = &GLES2_UpdateClipRect;
renderer->RenderClear = &GLES2_RenderClear;
renderer->RenderDrawPoints = &GLES2_RenderDrawPoints;
renderer->RenderDrawLines = &GLES2_RenderDrawLines;
renderer->RenderFillRects = &GLES2_RenderFillRects;
renderer->RenderCopy = &GLES2_RenderCopy;
renderer->RenderReadPixels = &GLES2_RenderReadPixels;
renderer->RenderCopyEx = &GLES2_RenderCopyEx;
renderer->RenderReadPixels = &GLES2_RenderReadPixels;
renderer->RenderPresent = &GLES2_RenderPresent;
renderer->DestroyTexture = &GLES2_DestroyTexture;
renderer->DestroyRenderer = &GLES2_DestroyRenderer;