Separate out natively-texture image/bmp draws from cached-as-texture image/bmp draws

src/gpu/SkGpuDevice_drawTexture.cpp

Index: src/gpu/SkGpuDevice_drawTexture.cpp
diff --git a/src/gpu/SkGpuDevice_drawTexture.cpp b/src/gpu/SkGpuDevice_drawTexture.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..01734d6c0b9f56e4a06ff50fac9e80fdae25a21d
--- /dev/null
+++ b/src/gpu/SkGpuDevice_drawTexture.cpp
@@ -0,0 +1,161 @@
+/*
+ * 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 "SkGpuDevice.h"
+
+#include "GrBlurUtils.h"
+#include "GrCaps.h"
+#include "GrDrawContext.h"
+#include "GrStrokeInfo.h"
+#include "GrTextureParamsAdjuster.h"
+#include "SkDraw.h"
+#include "SkGrPriv.h"
+#include "SkMaskFilter.h"
+#include "effects/GrBicubicEffect.h"
+#include "effects/GrSimpleTextureEffect.h"
+#include "effects/GrTextureDomain.h"
+
+static inline bool use_shader(bool textureIsAlphaOnly, const SkPaint& paint) {
+    return textureIsAlphaOnly && paint.getShader();
+}
+
+static const GrFragmentProcessor* mix_texture_fp_with_paint_color_and_shader(
+    const GrFragmentProcessor* textureFP,
+    bool textureIsAlphaOnly,
+    GrContext* context,
+    const SkMatrix& viewMatrix,
+    const SkPaint& paint) {

[robertphillips, 2015/11/05 20:49:39]

'\n' ?

[bsalomon, 2015/11/06 15:24:26]

Done.

+    if (textureIsAlphaOnly) {
+        if (const SkShader* shader = paint.getShader()) {
+            SkAutoTUnref<const GrFragmentProcessor> shaderFP(
+                shader->asFragmentProcessor(context,
+                                            viewMatrix,
+                                            nullptr,
+                                            paint.getFilterQuality()));
+            if (!shaderFP) {
+                return nullptr;
+            }
+            const GrFragmentProcessor* fpSeries[] = { shaderFP, textureFP };
+            return GrFragmentProcessor::RunInSeries(fpSeries, 2);
+        } else {
+            return GrFragmentProcessor::MulOutputByInputUnpremulColor(textureFP);
+        }
+    } else {
+        return GrFragmentProcessor::MulOutputByInputAlpha(textureFP);
+    }
+}
+
+void SkGpuDevice::drawTextureRect(GrTextureAdjuster* adjuster,
+                                  bool alphaTexture,
+                                  const SkRect& clippedSrcRect,
+                                  const SkRect& dstRect,
+                                  const SkMatrix& viewMatrix,
+                                  const GrClip& clip,
+                                  const SkPaint& paint,
+                                  SkCanvas::SrcRectConstraint constraint) {
+    SkMatrix localMatrix;
+    if (localMatrix.setRectToRect(clippedSrcRect, dstRect, SkMatrix::kFill_ScaleToFit)) {
+        this->drawTextureRectPrecomputedLocalMatrix(adjuster, alphaTexture, clippedSrcRect,
+                                                    dstRect, viewMatrix, localMatrix, clip,
+                                                    paint, constraint);
+    }
+}
+
+void SkGpuDevice::drawTextureRectPrecomputedLocalMatrix(GrTextureAdjuster* adjuster,
+                                                        bool alphaTexture,
+                                                        const SkRect& clippedSrcRect,
+                                                        const SkRect& dstRect,
+                                                        const SkMatrix& viewMatrix,
+                                                        const SkMatrix& localMatrix,
+                                                        const GrClip& clip,
+                                                        const SkPaint& paint,
+                                                        SkCanvas::SrcRectConstraint constraint) {
+    // Specifying the texture coords as local coordinates is an attempt to enable more batching
+    // by not baking anything about the srcRect, dstRect, or viewMatrix, into the texture FP. In
+    // the future this should be an opaque optimization enabled by the combination of batch/GP and
+    // FP.
+    const SkMatrix* textureFPMatrix;
+    SkMatrix tempMatrix;
+    const SkMaskFilter* mf = paint.getMaskFilter();
+    GrTexture* texture = adjuster->originalTexture();
+    // The shader expects proper local coords, so we can't replace local coords with texture coords
+    // if the shader will be used. If we have a mask filter we will change the underlying geometry
+    // that is rendered.
+    bool canUseTextureCoordsAsLocalCoords = !use_shader(alphaTexture, paint) && !mf;
+    if (canUseTextureCoordsAsLocalCoords) {
+        textureFPMatrix = &SkMatrix::I();
+    } else {
+        if (!localMatrix.invert(&tempMatrix)) {
+            return;
+        }
+        tempMatrix.postIDiv(texture->width(), texture->height());
+        textureFPMatrix = &tempMatrix;
+    }
+
+    bool doBicubic;
+    GrTextureParams::FilterMode fm =
+        GrSkFilterQualityToGrFilterMode(paint.getFilterQuality(), viewMatrix, localMatrix,
+                                        &doBicubic);
+    const GrTextureParams::FilterMode* filterMode = doBicubic ? nullptr : &fm;
+
+    GrTextureAdjuster::FilterConstraint constraintMode;
+    if (SkCanvas::kFast_SrcRectConstraint == constraint) {
+        constraintMode = GrTextureAdjuster::kNo_FilterConstraint;
+    } else {
+        constraintMode = GrTextureAdjuster::kYes_FilterConstraint;
+    }
+    
+    // If we have to outset for AA then we will generate texture coords outside the src rect. The
+    // same happens for any mask filter that extends the bounds rendered in the dst.
+    bool coordsAllInsideSrcRect = !paint.isAntiAlias() && !mf;
+
+    SkAutoTUnref<const GrFragmentProcessor> fp(adjuster->createFragmentProcessor(
+        *textureFPMatrix, clippedSrcRect, constraintMode, coordsAllInsideSrcRect, filterMode));
+    if (!fp) {
+        return;
+    }
+    fp.reset(mix_texture_fp_with_paint_color_and_shader(fp, alphaTexture, this->context(),
+                                                        viewMatrix, paint));
+    GrPaint grPaint;
+    if (!SkPaintToGrPaintReplaceShader(fContext, paint, fp, &grPaint)) {
+        return;
+    }
+
+    if (canUseTextureCoordsAsLocalCoords) {
+        SkRect localRect;
+        localRect.fLeft = clippedSrcRect.fLeft / texture->width();
+        localRect.fBottom = clippedSrcRect.fBottom / texture->height();
+        localRect.fRight = clippedSrcRect.fRight / texture->width();
+        localRect.fTop = clippedSrcRect.fTop / texture->height();
+        fDrawContext->fillRectToRect(clip, grPaint, viewMatrix, dstRect, localRect);
+        return;
+    }
+
+    if (!mf) {
+        fDrawContext->drawRect(clip, grPaint, viewMatrix, dstRect);
+        return;
+    }
+
+    // First see if we can do the draw + mask filter direct to the dst.
+    SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
+    SkRRect rrect;
+    rrect.setRect(dstRect);
+    if (mf->directFilterRRectMaskGPU(fContext->textureProvider(),
+                                      fDrawContext,
+                                      &grPaint,
+                                      clip,
+                                      viewMatrix,
+                                      rec,
+                                      rrect)) {
+        return;
+    }
+    SkPath rectPath;
+    rectPath.addRect(dstRect);
+    GrBlurUtils::drawPathWithMaskFilter(this->context(), fDrawContext, fRenderTarget, fClip,
+                                        rectPath, &grPaint, viewMatrix, mf, paint.getPathEffect(),
+                                        GrStrokeInfo::FillInfo());
+}