Move most of the transform logic into the primitive processors

src/gpu/gl/GrGLProgramDesc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGLProgramDesc.h"
 
 #include "GrGLProcessor.h"
 #include "GrProcessor.h"
@@ skipping 22 matching lines @@
         }
         if (kRGB_GrColorComponentFlags & swizzleComponentMask) {
             // The 'r', 'g', and/or 'b's must be mapped to 'a' according to our semantics that
             // alpha-only textures smear alpha across all four channels when read.
             return true;
         }
     }
     return false;
 }
 
-/**
- * The key for an individual coord transform is made up of a matrix type, a precision, and a bit
- * that indicates the source of the input coords.
- */
-enum {
-    kMatrixTypeKeyBits   = 1,
-    kMatrixTypeKeyMask   = (1 << kMatrixTypeKeyBits) - 1,
-    
-    kPrecisionBits       = 2,
-    kPrecisionShift      = kMatrixTypeKeyBits,
-
-    kPositionCoords_Flag = (1 << (kPrecisionShift + kPrecisionBits)),
-    kDeviceCoords_Flag   = kPositionCoords_Flag + kPositionCoords_Flag,
-
-    kTransformKeyBits    = kMatrixTypeKeyBits + kPrecisionBits + 2,
-};
-
-GR_STATIC_ASSERT(kHigh_GrSLPrecision < (1 << kPrecisionBits));
-
-/**
- * We specialize the vertex code for each of these matrix types.
- */
-enum MatrixType {
-    kNoPersp_MatrixType  = 0,
-    kGeneral_MatrixType  = 1,
-};
-
-static uint32_t gen_transform_key(const GrPendingFragmentStage& stage, bool useExplicitLocalCoords) {
-    uint32_t totalKey = 0;
-    int numTransforms = stage.processor()->numTransforms();
-    for (int t = 0; t < numTransforms; ++t) {
-        uint32_t key = 0;
-        if (stage.isPerspectiveCoordTransform(t)) {
-            key |= kGeneral_MatrixType;
-        } else {
-            key |= kNoPersp_MatrixType;
-        }
-
-        const GrCoordTransform& coordTransform = stage.processor()->coordTransform(t);
-        if (kLocal_GrCoordSet == coordTransform.sourceCoords() && !useExplicitLocalCoords) {
-            key |= kPositionCoords_Flag;
-        } else if (kDevice_GrCoordSet == coordTransform.sourceCoords()) {
-            key |= kDeviceCoords_Flag;
-        }
-
-        GR_STATIC_ASSERT(kGrSLPrecisionCount <= (1 << kPrecisionBits));
-        key |= (coordTransform.precision() << kPrecisionShift);
-
-        key <<= kTransformKeyBits * t;
-
-        SkASSERT(0 == (totalKey & key)); // keys for each transform ought not to overlap
-        totalKey |= key;
-    }
-    return totalKey;
-}
-
 static uint32_t gen_texture_key(const GrProcessor& proc, const GrGLCaps& caps) {
     uint32_t key = 0;
     int numTextures = proc.numTextures();
     for (int t = 0; t < numTextures; ++t) {
         const GrTextureAccess& access = proc.textureAccess(t);
         uint32_t configComponentMask = GrPixelConfigComponentMask(access.getTexture()->config());
         if (swizzle_requires_alpha_remapping(caps, configComponentMask, access.swizzleMask())) {
             key |= 1 << t;
         }
     }
@@ skipping 36 matching lines @@
 bool GrGLProgramDescBuilder::Build(const GrOptDrawState& optState,
                                    const GrProgramDesc::DescInfo& descInfo,
                                    GrGpu::DrawType drawType,
                                    GrGLGpu* gpu,
                                    GrProgramDesc* desc) {
     // The descriptor is used as a cache key. Thus when a field of the
     // descriptor will not affect program generation (because of the attribute
     // bindings in use or other descriptor field settings) it should be set
     // to a canonical value to avoid duplicate programs with different keys.
 
-    bool requiresLocalCoordAttrib = descInfo.fRequiresLocalCoordAttrib;
-
     GR_STATIC_ASSERT(0 == kProcessorKeysOffset % sizeof(uint32_t));
     // Make room for everything up to the effect keys.
     desc->fKey.reset();
     desc->fKey.push_back_n(kProcessorKeysOffset);
 
     GrProcessorKeyBuilder b(&desc->fKey);
 
     const GrPrimitiveProcessor& primProc = *optState.getPrimitiveProcessor();
     primProc.getGLProcessorKey(optState.getBatchTracker(), gpu->glCaps(), &b);
     if (!get_meta_key(primProc, gpu->glCaps(), 0, &b)) {
         desc->fKey.reset();
         return false;
     }
 
     for (int s = 0; s < optState.numFragmentStages(); ++s) {
         const GrPendingFragmentStage& fps = optState.getFragmentStage(s);
         const GrFragmentProcessor& fp = *fps.processor();
         fp.getGLProcessorKey(gpu->glCaps(), &b);
-        if (!get_meta_key(fp, gpu->glCaps(),
-                          gen_transform_key(fps, requiresLocalCoordAttrib), &b)) {
+        if (!get_meta_key(fp, gpu->glCaps(), primProc.getTransformKey(fp.coordTransforms()), &b)) {
             desc->fKey.reset();
             return false;
         }
     }
 
     const GrXferProcessor& xp = *optState.getXferProcessor();
     xp.getGLProcessorKey(gpu->glCaps(), &b);
     if (!get_meta_key(xp, gpu->glCaps(), 0, &b)) {
         desc->fKey.reset();
         return false;
     }
 
     // --------DO NOT MOVE HEADER ABOVE THIS LINE--------------------------------------------------
     // Because header is a pointer into the dynamic array, we can't push any new data into the key
     // below here.
     GLKeyHeader* header = desc->atOffset<GLKeyHeader, kHeaderOffset>();
 
     // make sure any padding in the header is zeroed.
     memset(header, 0, kHeaderSize);
 
     bool isPathRendering = GrGpu::IsPathRenderingDrawType(drawType);
     if (gpu->caps()->pathRenderingSupport() && isPathRendering) {
         header->fUseNvpr = true;
-        SkASSERT(!optState.hasGeometryProcessor());
     } else {
         header->fUseNvpr = false;
     }
 
     if (descInfo.fReadsDst) {
         const GrDeviceCoordTexture* dstCopy = optState.getDstCopy();
         SkASSERT(dstCopy || gpu->caps()->dstReadInShaderSupport());
         const GrTexture* dstCopyTexture = NULL;
         if (dstCopy) {
             dstCopyTexture = dstCopy->texture();
@@ skipping 11 matching lines @@
                                                                   gpu->glCaps());
     } else {
         header->fFragPosKey = 0;
     }
 
     header->fColorEffectCnt = optState.numColorStages();
     header->fCoverageEffectCnt = optState.numCoverageStages();
     desc->finalize();
     return true;
 }