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gallium: fix zero-sized viewport bug

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If st_create_framebuffer() is called with width=0, height=0 and the program
never called glViewport, the viewport wasn't properly initalized.  This fixes
that.
This commit is contained in:
Brian 2008-02-26 14:26:40 -07:00
parent 80efc5feb0
commit b93cf55f4e
1 changed files with 11 additions and 0 deletions
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11
src/mesa/state_tracker/st_framebuffer.c
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@ -124,6 +124,17 @@ void st_resize_framebuffer( struct st_framebuffer *stfb,
if (stfb->Base.Width != width || stfb->Base.Height != height) {
GET_CURRENT_CONTEXT(ctx);
if (ctx) {
if (stfb->InitWidth == 0 && stfb->InitHeight == 0) {
/* didn't have a valid size until now */
stfb->InitWidth = width;
stfb->InitHeight = height;
if (ctx->Viewport.Width <= 1) {
/* set context's initial viewport/scissor size */
_mesa_set_viewport(ctx, 0, 0, width, height);
_mesa_set_scissor(ctx, 0, 0, width, height);
}
}
_mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
assert(stfb->Base.Width == width);