pandory500/SDL-mirror
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Added function SDL_RenderSetClipRect()

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This commit is contained in:
Sam Lantinga 2011-02-07 20:06:26 -08:00
parent 42bac7a31e
commit 8253658837
9 changed files with 140 additions and 24 deletions
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20
src/render/opengl/SDL_render_gl.c
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@ -52,6 +52,7 @@ static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, void **pixels, int *pitch);
static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void GL_SetClipRect(SDL_Renderer * renderer, const SDL_Rect * rect);
static int GL_RenderClear(SDL_Renderer * renderer);
static int GL_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count);
@ -199,6 +200,7 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->UpdateTexture = GL_UpdateTexture;
renderer->LockTexture = GL_LockTexture;
renderer->UnlockTexture = GL_UnlockTexture;
renderer->SetClipRect = GL_SetClipRect;
renderer->RenderClear = GL_RenderClear;
renderer->RenderDrawPoints = GL_RenderDrawPoints;
renderer->RenderDrawLines = GL_RenderDrawLines;
@ -510,6 +512,24 @@ GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
renderdata->glDisable(data->type);
}
static void
GL_SetClipRect(SDL_Renderer * renderer, const SDL_Rect * rect)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_ActivateRenderer(renderer);
if (rect) {
int w, h;
SDL_GetWindowSize(renderer->window, &w, &h);
data->glScissor(rect->x, (h-(rect->y+rect->h)), rect->w, rect->h);
data->glEnable(GL_SCISSOR_TEST);
} else {
data->glDisable(GL_SCISSOR_TEST);
}
}
static void
GL_SetBlendMode(GL_RenderData * data, int blendMode)
{