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Support depth clamping in OpenGL where available.

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Should make support for depth texturing quite easy.

Unfortunately, this extension does not exist on OpenGL ES. There we'll
have to use ugly tricks with gl_FragDepth if we want this.
This commit is contained in:
Henrik Rydgård committed 2021-07-09 21:09:44 +02:00
1 parent 5bd9e93196
commit df6abe83a3
9 files changed
+44 -6
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GPU/GLES/StateMappingGLES.cpp
+18 -1
View File
@@ -230,7 +230,24 @@ void DrawEngineGLES::ApplyDrawState(int prim) {
GLenum cullMode = cullingMode[gstate.getCullMode() ^ !useBufferedRendering];
cullEnable = !gstate.isModeClear() && prim != GE_PRIM_RECTANGLES && gstate.isCullEnabled();
renderManager->SetRaster(cullEnable, GL_CCW, cullMode, dither);
bool depthClampEnable = false;
if (gstate.isModeClear() || gstate.isModeThrough()) {
// TODO: Might happen in clear mode if not through...
depthClampEnable = false;
} else {
// Set cull
if (gstate.getDepthRangeMin() == 0 || gstate.getDepthRangeMax() == 65535) {
// TODO: Still has a bug where we clamp to depth range if one is not the full range.
// But the alternate is not clamping in either direction...
depthClampEnable = gstate.isDepthClampEnabled() && gstate_c.Supports(GPU_SUPPORTS_DEPTH_CLAMP);
} else {
// We just want to clip in this case, the clamp would be clipped anyway.
depthClampEnable = false;
}
}
renderManager->SetRaster(cullEnable, GL_CCW, cullMode, dither, depthClampEnable);
}
if (gstate_c.IsDirty(DIRTY_DEPTHSTENCIL_STATE)) {