Shader and Compiler track uses of gl_FragCoord and gl_FragData and MRT extension usage.
TRAC #22668
Signed-off-by: Jamie Madill
Signed-off-by: Shannon Woods
Author: Geoff Lang
git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2084 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/compiler/OutputHLSL.cpp b/src/compiler/OutputHLSL.cpp
index 4b314ef..39c5983 100644
--- a/src/compiler/OutputHLSL.cpp
+++ b/src/compiler/OutputHLSL.cpp
@@ -48,6 +48,8 @@
mUsesTexture2DProjLod0_bias = false;
mUsesTextureCubeLod0 = false;
mUsesTextureCubeLod0_bias = false;
+ mUsesFragColor = false;
+ mUsesFragData = false;
mUsesDepthRange = false;
mUsesFragCoord = false;
mUsesPointCoord = false;
@@ -82,6 +84,8 @@
mUsesAtan2_3 = false;
mUsesAtan2_4 = false;
+ mNumRenderTargets = resources.EXT_draw_buffers ? resources.MaxDrawBuffers : 1;
+
mScopeDepth = 0;
mUniqueIndex = 0;
@@ -205,6 +209,11 @@
if (shaderType == SH_FRAGMENT_SHADER)
{
+ TExtensionBehavior::const_iterator iter = mContext.extensionBehavior().find("GL_EXT_draw_buffers");
+ bool usingMRTExtension = iter != mContext.extensionBehavior().end() && iter->second == EBhEnable;
+
+ unsigned int numColorValues = usingMRTExtension ? mNumRenderTargets : 1;
+
out << "// Varyings\n";
out << varyings;
out << "\n"
@@ -582,6 +591,21 @@
}
else UNREACHABLE();
}
+
+ if (usingMRTExtension && mNumRenderTargets > 1)
+ {
+ out << "#define GL_USES_MRT\n";
+ }
+
+ if (mUsesFragColor)
+ {
+ out << "#define GL_USES_FRAG_COLOR\n";
+ }
+
+ if (mUsesFragData)
+ {
+ out << "#define GL_USES_FRAG_DATA\n";
+ }
}
else // Vertex shader
{
@@ -1099,10 +1123,12 @@
if (name == "gl_FragColor")
{
out << "gl_Color[0]";
+ mUsesFragColor = true;
}
else if (name == "gl_FragData")
{
out << "gl_Color";
+ mUsesFragData = true;
}
else if (name == "gl_DepthRange")
{
diff --git a/src/compiler/OutputHLSL.h b/src/compiler/OutputHLSL.h
index 8438681..4a6d12a 100644
--- a/src/compiler/OutputHLSL.h
+++ b/src/compiler/OutputHLSL.h
@@ -102,6 +102,8 @@
bool mUsesTexture2DProjLod0_bias;
bool mUsesTextureCubeLod0;
bool mUsesTextureCubeLod0_bias;
+ bool mUsesFragColor;
+ bool mUsesFragData;
bool mUsesDepthRange;
bool mUsesFragCoord;
bool mUsesPointCoord;
@@ -136,6 +138,8 @@
bool mUsesAtan2_3;
bool mUsesAtan2_4;
+ int mNumRenderTargets;
+
typedef std::set<TString> Constructors;
Constructors mConstructors;