pandory500/SDL-mirror
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Fixed bug 1844 - glScissor calls are wrong - Patch attached

Browse source 
Martin Gerhardy

the coordinate system from sdl is not correctly transformed to the coordinate system of opengl. glScissor expects them to be a little bit different. Attached is a patch that fixes this
This commit is contained in:
Philipp Wiesemann 2013-05-12 13:40:02 +02:00
parent 98b4492c37
commit df60747e3b
3 changed files with 6 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

3
src/render/opengl/SDL_render_gl.c
View file

@ -794,7 +794,8 @@ GL_UpdateClipRect(SDL_Renderer * renderer)
if (!SDL_RectEmpty(rect)) {
data->glEnable(GL_SCISSOR_TEST);
data->glScissor(rect->x, rect->h - rect->y, rect->w, rect->h);
int lowerLeft = renderer->viewport.h - rect->y - rect->h;
data->glScissor(rect->x, lowerLeft, rect->w, rect->h);
} else {
data->glDisable(GL_SCISSOR_TEST);
}