Implements separate stencil support to proposed WebGL limitations

TRAC #11450 Author: Shannon Woods Signed-off-by: Andrew Lewycky Signed-off-by: Daniel Koch git-svn-id: https://angleproject.googlecode.com/svn/trunk@32 736b8ea6-26fd-11df-bfd4-992fa37f6226

Implements separate stencil support to proposed WebGL limitations
1436e261 · daniel@transgaming.com · f67f82ec · 1436e261
Commit 1436e261 authored Mar 17, 2010 by daniel@transgaming.com
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Context.cpp libGLESv2/Context.cpp +5 -3

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--- a/libGLESv2/Context.cpp
+++ b/libGLESv2/Context.cpp
@@ -908,9 +908,11 @@ void Context::applyState()
        const D3DRENDERSTATETYPE D3DRS_CCW_STENCILREF = D3DRS_STENCILREF;
        const D3DRENDERSTATETYPE D3DRS_CCW_STENCILMASK = D3DRS_STENCILMASK;
        const D3DRENDERSTATETYPE D3DRS_CCW_STENCILWRITEMASK = D3DRS_STENCILWRITEMASK;
-        ASSERT(stencilRef == stencilBackRef);
-        ASSERT(stencilMask == stencilBackMask);
-        ASSERT(stencilWritemask == stencilBackWritemask);
+        if(stencilWritemask != stencilBackWritemask || stencilRef != stencilBackRef || stencilMask != stencilBackMask)
+        {
+            ERR("Separate front/back stencil writemasks, reference values, or stencil mask values are invalid under WebGL.");
+            return error(GL_INVALID_OPERATION);
+        }

        device->SetRenderState(frontFace == GL_CCW ? D3DRS_STENCILWRITEMASK : D3DRS_CCW_STENCILWRITEMASK, stencilWritemask);
        device->SetRenderState(frontFace == GL_CCW ? D3DRS_STENCILFUNC : D3DRS_CCW_STENCILFUNC, es2dx::ConvertComparison(stencilFunc));