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GBA Video: Fix GL degenerate windows

This commit is contained in:
Vicki Pfau 2019-05-17 21:41:35 -07:00
parent 876c3051c2
commit ebb6d65945
1 changed files with 10 additions and 5 deletions
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15
src/gba/renderers/gl.c
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@ -1256,7 +1256,12 @@ void GBAVideoGLRendererDrawBackgroundMode2(struct GBAVideoGLRenderer* renderer,
}
static void _clearWindow(GBAWindowControl window, int start, int end, int y, int scale, int bldy) {
glScissor(start, y, end - start, scale);
if (start > end) {
_clearWindow(window, start, GBA_VIDEO_HORIZONTAL_PIXELS, y, scale, bldy);
_clearWindow(window, 0, end, y, scale, bldy);
return;
}
glScissor(start * scale, y, (end - start) * scale, scale);
window = ~window & 0xFF;
glClearColor((window & 0xF) / 32.f, (window >> 4) / 32.f, bldy / 16.f, 0);
glClear(GL_COLOR_BUFFER_BIT);
@ -1266,14 +1271,14 @@ void GBAVideoGLRendererDrawWindow(struct GBAVideoGLRenderer* renderer, int y) {
glBindFramebuffer(GL_FRAMEBUFFER, renderer->fbo[GBA_GL_FBO_WINDOW]);
int dispcnt = ((renderer->dispcnt >> 8) & 0x1F) | 0x20;
if (!(renderer->dispcnt & 0xE000)) {
_clearWindow(dispcnt, 0, GBA_VIDEO_HORIZONTAL_PIXELS * renderer->scale, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(dispcnt, 0, GBA_VIDEO_HORIZONTAL_PIXELS, y * renderer->scale, renderer->scale, renderer->bldy);
} else {
_clearWindow(renderer->winout & dispcnt, 0, GBA_VIDEO_HORIZONTAL_PIXELS * renderer->scale, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(renderer->winout & dispcnt, 0, GBA_VIDEO_HORIZONTAL_PIXELS, y * renderer->scale, renderer->scale, renderer->bldy);
if (GBARegisterDISPCNTIsWin1Enable(renderer->dispcnt) && y >= renderer->winN[1].v.start && y < renderer->winN[1].v.end) {
_clearWindow(renderer->winN[1].control & dispcnt, renderer->winN[1].h.start * renderer->scale, renderer->winN[1].h.end * renderer->scale, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(renderer->winN[1].control & dispcnt, renderer->winN[1].h.start, renderer->winN[1].h.end, y * renderer->scale, renderer->scale, renderer->bldy);
}
if (GBARegisterDISPCNTIsWin0Enable(renderer->dispcnt) && y >= renderer->winN[0].v.start && y < renderer->winN[0].v.end) {
_clearWindow(renderer->winN[0].control & dispcnt, renderer->winN[0].h.start * renderer->scale, renderer->winN[0].h.end * renderer->scale, y * renderer->scale, renderer->scale, renderer->bldy);
_clearWindow(renderer->winN[0].control & dispcnt, renderer->winN[0].h.start, renderer->winN[0].h.end, y * renderer->scale, renderer->scale, renderer->bldy);
}
}
}