create struct to hold all the params passed around for shader::context

src/core/SkBitmapProcShader.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkColorPriv.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
@@ skipping 79 matching lines @@
     if (kIndex_8_SkColorType == bm.colorType()) {
         // ugh, I have to lock-pixels to inspect the colortable
         SkAutoLockPixels alp(bm);
         if (!bm.getColorTable()) {
             return false;
         }
     }
     return true;
 }
 
-bool SkBitmapProcShader::validInternal(const SkBitmap& device,
-                                       const SkPaint& paint,
-                                       const SkMatrix& matrix,
-                                       SkMatrix* totalInverse,
+bool SkBitmapProcShader::validInternal(const ContextRec& rec, SkMatrix* totalInverse,
                                        SkBitmapProcState* state) const {
     if (!fRawBitmap.getTexture() && !valid_for_drawing(fRawBitmap)) {
         return false;
     }
 
     // Make sure we can use totalInverse as a cache.
     SkMatrix totalInverseLocal;
     if (NULL == totalInverse) {
         totalInverse = &totalInverseLocal;
     }
 
     // Do this first, so we know the matrix can be inverted.
-    if (!this->INHERITED::validContext(device, paint, matrix, totalInverse)) {
+    if (!this->INHERITED::validContext(rec, totalInverse)) {
         return false;
     }
 
     SkASSERT(state);
     state->fTileModeX = fTileModeX;
     state->fTileModeY = fTileModeY;
     state->fOrigBitmap = fRawBitmap;
-    return state->chooseProcs(*totalInverse, paint);
+    return state->chooseProcs(*totalInverse, *rec.fPaint);
 }
 
-bool SkBitmapProcShader::validContext(const SkBitmap& device,
-                                      const SkPaint& paint,
-                                      const SkMatrix& matrix,
-                                      SkMatrix* totalInverse) const {
+bool SkBitmapProcShader::validContext(const ContextRec& rec, SkMatrix* totalInverse) const {
     SkBitmapProcState state;
-    return this->validInternal(device, paint, matrix, totalInverse, &state);
+    return this->validInternal(rec, totalInverse, &state);
 }
 
-SkShader::Context* SkBitmapProcShader::createContext(const SkBitmap& device, const SkPaint& paint,
-                                                     const SkMatrix& matrix, void* storage) const {
+SkShader::Context* SkBitmapProcShader::createContext(const ContextRec& rec, void* storage) const {
     void* stateStorage = (char*)storage + sizeof(BitmapProcShaderContext);
     SkBitmapProcState* state = SkNEW_PLACEMENT(stateStorage, SkBitmapProcState);
-    if (!this->validInternal(device, paint, matrix, NULL, state)) {
+    if (!this->validInternal(rec, NULL, state)) {
         state->~SkBitmapProcState();
         return NULL;
     }
 
-    return SkNEW_PLACEMENT_ARGS(storage, BitmapProcShaderContext,
-                                (*this, device, paint, matrix, state));
+    return SkNEW_PLACEMENT_ARGS(storage, BitmapProcShaderContext, (*this, rec, state));
 }
 
 size_t SkBitmapProcShader::contextSize() const {
     // The SkBitmapProcState is stored outside of the context object, with the context holding
     // a pointer to it.
     return sizeof(BitmapProcShaderContext) + sizeof(SkBitmapProcState);
 }
 
 SkBitmapProcShader::BitmapProcShaderContext::BitmapProcShaderContext(
-        const SkBitmapProcShader& shader, const SkBitmap& device,
-        const SkPaint& paint, const SkMatrix& matrix, SkBitmapProcState* state)
-    : INHERITED(shader, device, paint, matrix)
+        const SkBitmapProcShader& shader, const ContextRec& rec, SkBitmapProcState* state)
+    : INHERITED(shader, rec)
     , fState(state)
 {
     const SkBitmap& bitmap = *fState->fBitmap;
     bool bitmapIsOpaque = bitmap.isOpaque();
 
     // update fFlags
     uint32_t flags = 0;
     if (bitmapIsOpaque && (255 == this->getPaintAlpha())) {
         flags |= kOpaqueAlpha_Flag;
     }
 
     switch (bitmap.colorType()) {
         case kRGB_565_SkColorType:
             flags |= (kHasSpan16_Flag | kIntrinsicly16_Flag);
             break;
         case kIndex_8_SkColorType:
         case kN32_SkColorType:
             if (bitmapIsOpaque) {
                 flags |= kHasSpan16_Flag;
             }
             break;
         case kAlpha_8_SkColorType:
             break;  // never set kHasSpan16_Flag
         default:
             break;
     }
 
-    if (paint.isDither() && bitmap.colorType() != kRGB_565_SkColorType) {
+    if (rec.fPaint->isDither() && bitmap.colorType() != kRGB_565_SkColorType) {
         // gradients can auto-dither in their 16bit sampler, but we don't so
         // we clear the flag here.
         flags &= ~kHasSpan16_Flag;
     }
 
     // if we're only 1-pixel high, and we don't rotate, then we can claim this
     if (1 == bitmap.height() &&
             only_scale_and_translate(this->getTotalInverse())) {
         flags |= kConstInY32_Flag;
         if (flags & kHasSpan16_Flag) {
@@ skipping 291 matching lines @@
     GrEffectRef* effect = NULL;
     if (paintFilterLevel == SkPaint::kHigh_FilterLevel) {
         effect = GrBicubicEffect::Create(texture, matrix, tm);
     } else {
         effect = GrSimpleTextureEffect::Create(texture, matrix, params);
     }
     GrUnlockAndUnrefCachedBitmapTexture(texture);
     return effect;
 }
 #endif