ES31: Implement GL_OES_geometry_shader built-ins in GLSL compiler
This patch intends to implement all built-in constants, variables and
functions defined in OpenGL ES 3.1 extension GL_OES_geometry_shader
in ANGLE GLSL compiler.
1. Add all built-in constants defined in GL_OES_geometry_shader.
2. Add built-in functions EmitVertex() and EndPrimitive() required
in Geometry Shader.
3. Add built-in variables gl_PrimitiveIDIn and gl_InvocationID to
Geometry Shader.
4. Add built-in variables gl_PrimitiveID and gl_Layer to both
Geometry Shader and Fragment Shader when GL_OES_geometry_shader
is enabled.
BUG=angleproject:1941
TEST=angle_unittests
Change-Id: I92821553ed0efee2ccb77fead6e065e7799819d0
Reviewed-on: https://chromium-review.googlesource.com/627670
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/compiler/translator/ParseContext.cpp b/src/compiler/translator/ParseContext.cpp
index a1c12f3..6a312b6 100644
--- a/src/compiler/translator/ParseContext.cpp
+++ b/src/compiler/translator/ParseContext.cpp
@@ -521,6 +521,24 @@
case EvqPerVertexIn:
message = "can't modify any member in gl_in";
break;
+ case EvqPrimitiveIDIn:
+ message = "can't modify gl_PrimitiveIDIn";
+ break;
+ case EvqInvocationID:
+ message = "can't modify gl_InvocationID";
+ break;
+ case EvqPrimitiveID:
+ if (mShaderType == GL_FRAGMENT_SHADER)
+ {
+ message = "can't modify gl_PrimitiveID in a fragment shader";
+ }
+ break;
+ case EvqLayer:
+ if (mShaderType == GL_FRAGMENT_SHADER)
+ {
+ message = "can't modify gl_Layer in a fragment shader";
+ }
+ break;
default:
//
// Type that can't be written to?