Introduce GrColorSpaceXform, for gamut conversion on textures

src/gpu/GrTextureParamsAdjuster.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureParamsAdjuster.h"
 
 #include "GrCaps.h"
+#include "GrColorSpaceXform.h"
 #include "GrContext.h"
 #include "GrDrawContext.h"
 #include "GrGpu.h"
 #include "GrGpuResourcePriv.h"
 #include "GrResourceKey.h"
 #include "GrTexture.h"
 #include "GrTextureParams.h"
 #include "GrTextureProvider.h"
 #include "SkCanvas.h"
 #include "SkGr.h"
@@ skipping 66 matching lines @@
         (subset->width() != copyParams.fWidth || subset->height() != copyParams.fHeight)) {
         SkRect domain;
         domain.fLeft = (subset->fLeft + 0.5f) * sx;
         domain.fTop = (subset->fTop + 0.5f)* sy;
         domain.fRight = (subset->fRight - 0.5f) * sx;
         domain.fBottom = (subset->fBottom - 0.5f) * sy;
         // This would cause us to read values from outside the subset. Surely, the caller knows
         // better!
         SkASSERT(copyParams.fFilter != GrTextureParams::kMipMap_FilterMode);
         paint.addColorFragmentProcessor(
-            GrTextureDomainEffect::Make(inputTexture, SkMatrix::I(), domain,
+            GrTextureDomainEffect::Make(inputTexture, nullptr, SkMatrix::I(), domain,
                                         GrTextureDomain::kClamp_Mode,
                                         copyParams.fFilter));
     } else {
         GrTextureParams params(SkShader::kClamp_TileMode, copyParams.fFilter);
-        paint.addColorTextureProcessor(inputTexture, SkMatrix::I(), params);
+        paint.addColorTextureProcessor(inputTexture, nullptr, SkMatrix::I(), params);
     }
     paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
 
     SkRect localRect;
     if (subset) {
         localRect = SkRect::Make(*subset);
         localRect.fLeft *= sx;
         localRect.fTop *= sy;
         localRect.fRight *= sx;
         localRect.fBottom *= sy;
@@ skipping 230 matching lines @@
     }
     domainRect->fLeft /= texW;
     domainRect->fTop /= texH;
     domainRect->fRight /= texW;
     domainRect->fBottom /= texH;
     return kDomain_DomainMode;
 }
 
 static sk_sp<GrFragmentProcessor> create_fp_for_domain_and_filter(
                                         GrTexture* texture,
+                                        sk_sp<GrColorSpaceXform> colorSpaceXform,
                                         const SkMatrix& textureMatrix,
                                         DomainMode domainMode,
                                         const SkRect& domain,
                                         const GrTextureParams::FilterMode* filterOrNullForBicubic) {
     SkASSERT(kTightCopy_DomainMode != domainMode);
     if (filterOrNullForBicubic) {
         if (kDomain_DomainMode == domainMode) {
-            return GrTextureDomainEffect::Make(texture, textureMatrix, domain,
-                                               GrTextureDomain::kClamp_Mode,
+            return GrTextureDomainEffect::Make(texture, std::move(colorSpaceXform), textureMatrix,
+                                               domain, GrTextureDomain::kClamp_Mode,
                                                *filterOrNullForBicubic);
         } else {
             GrTextureParams params(SkShader::kClamp_TileMode, *filterOrNullForBicubic);
-            return GrSimpleTextureEffect::Make(texture, textureMatrix, params);
+            return GrSimpleTextureEffect::Make(texture, std::move(colorSpaceXform), textureMatrix,
+                                               params);
         }
     } else {
         if (kDomain_DomainMode == domainMode) {
-            return GrBicubicEffect::Make(texture, textureMatrix, domain);
+            return GrBicubicEffect::Make(texture, std::move(colorSpaceXform), textureMatrix,
+                                         domain);
         } else {
             static const SkShader::TileMode kClampClamp[] =
                 { SkShader::kClamp_TileMode, SkShader::kClamp_TileMode };
-            return GrBicubicEffect::Make(texture, textureMatrix, kClampClamp);
+            return GrBicubicEffect::Make(texture, std::move(colorSpaceXform), textureMatrix,
+                                         kClampClamp);
         }
     }
 }
 
 sk_sp<GrFragmentProcessor> GrTextureAdjuster::createFragmentProcessor(
                                         const SkMatrix& origTextureMatrix,
                                         const SkRect& origConstraintRect,
                                         FilterConstraint filterConstraint,
                                         bool coordsLimitedToConstraintRect,
                                         const GrTextureParams::FilterMode* filterOrNullForBicubic,
@@ skipping 42 matching lines @@
         static const GrTextureParams::FilterMode kBilerp = GrTextureParams::kBilerp_FilterMode;
         domainMode =
             determine_domain_mode(*constraintRect, filterConstraint, coordsLimitedToConstraintRect,
                                   texture->width(), texture->height(),
                                   contentArea, &kBilerp, &domain);
         SkASSERT(kTightCopy_DomainMode != domainMode);
     }
     SkASSERT(kNoDomain_DomainMode == domainMode ||
              (domain.fLeft <= domain.fRight && domain.fTop <= domain.fBottom));
     textureMatrix.postIDiv(texture->width(), texture->height());
-    return create_fp_for_domain_and_filter(texture, textureMatrix, domainMode, domain,
-                                           filterOrNullForBicubic);
+    SkColorSpace* dstColorSpace = nullptr; // XFORMTODO
+    sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(this->getColorSpace(),
+                                                                       dstColorSpace);
+    return create_fp_for_domain_and_filter(texture, std::move(colorSpaceXform), textureMatrix,
+                                           domainMode, domain, filterOrNullForBicubic);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GrTexture* GrTextureMaker::refTextureForParams(const GrTextureParams& params,
                                                SkSourceGammaTreatment gammaTreatment) {
     CopyParams copyParams;
     bool willBeMipped = params.filterMode() == GrTextureParams::kMipMap_FilterMode;
 
     if (!fContext->caps()->mipMapSupport()) {
@@ skipping 57 matching lines @@
         return nullptr;
     }
     SkRect domain;
     DomainMode domainMode =
         determine_domain_mode(constraintRect, filterConstraint, coordsLimitedToConstraintRect,
                               texture->width(), texture->height(), nullptr, fmForDetermineDomain,
                               &domain);
     SkASSERT(kTightCopy_DomainMode != domainMode);
     SkMatrix normalizedTextureMatrix = textureMatrix;
     normalizedTextureMatrix.postIDiv(texture->width(), texture->height());
-    return create_fp_for_domain_and_filter(texture, normalizedTextureMatrix, domainMode, domain,
+    SkColorSpace* dstColorSpace = nullptr; // XFORMTODO
+    sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(this->getColorSpace(),
+                                                                       dstColorSpace);
+    return create_fp_for_domain_and_filter(texture, std::move(colorSpaceXform),
+                                           normalizedTextureMatrix, domainMode, domain,
                                            filterOrNullForBicubic);
 }
 
 GrTexture* GrTextureMaker::generateTextureForParams(const CopyParams& copyParams, bool willBeMipped,
                                                     SkSourceGammaTreatment gammaTreatment) {
     SkAutoTUnref<GrTexture> original(this->refOriginalTexture(willBeMipped, gammaTreatment));
     if (!original) {
         return nullptr;
     }
     return copy_on_gpu(original, nullptr, copyParams);
 }