add localmatrix-shader

src/core/SkShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkEmptyShader.h"
 #include "SkReadBuffer.h"
 #include "SkMallocPixelRef.h"
 #include "SkPaint.h"
 #include "SkPicture.h"
 #include "SkPictureShader.h"
 #include "SkScalar.h"
 #include "SkShader.h"
+#include "SkThread.h"
 #include "SkWriteBuffer.h"
 
+//#define SK_TRACK_SHADER_LIFETIME
+
+#ifdef SK_TRACK_SHADER_LIFETIME
+    static int32_t gShaderCounter;
+#endif
+
+static inline void inc_shader_counter() {
+#ifdef SK_TRACK_SHADER_LIFETIME
+    int32_t prev = sk_atomic_inc(&gShaderCounter);
+    SkDebugf("+++ shader counter %d\n", prev + 1);
+#endif
+}
+static inline void dec_shader_counter() {
+#ifdef SK_TRACK_SHADER_LIFETIME
+    int32_t prev = sk_atomic_dec(&gShaderCounter);
+    SkDebugf("--- shader counter %d\n", prev - 1);
+#endif
+}
+
 SkShader::SkShader(const SkMatrix* localMatrix) {
+    inc_shader_counter();
     if (localMatrix) {
         fLocalMatrix = *localMatrix;
     } else {
         fLocalMatrix.reset();
     }
 }
 
-SkShader::SkShader(SkReadBuffer& buffer)
-        : INHERITED(buffer) {
+SkShader::SkShader(SkReadBuffer& buffer) : INHERITED(buffer) {
+    inc_shader_counter();
     if (buffer.readBool()) {
         buffer.readMatrix(&fLocalMatrix);
     } else {
         fLocalMatrix.reset();
     }
 }
 
 SkShader::~SkShader() {
+    dec_shader_counter();
 }
 
 void SkShader::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     bool hasLocalM = this->hasLocalMatrix();
     buffer.writeBool(hasLocalM);
     if (hasLocalM) {
         buffer.writeMatrix(fLocalMatrix);
     }
 }
@@ skipping 139 matching lines @@
 }
 
 SkShader::GradientType SkShader::asAGradient(GradientInfo* info) const {
     return kNone_GradientType;
 }
 
 GrEffectRef* SkShader::asNewEffect(GrContext*, const SkPaint&) const {
     return NULL;
 }
 
+SkShader* SkShader::refAsALocalMatrixShader(SkMatrix*) const {
+    return NULL;
+}
+
 SkShader* SkShader::CreateEmptyShader() {
     return SkNEW(SkEmptyShader);
 }
 
 SkShader* SkShader::CreateBitmapShader(const SkBitmap& src, TileMode tmx, TileMode tmy,
                                        const SkMatrix* localMatrix) {
     return ::CreateBitmapShader(src, tmx, tmy, localMatrix, NULL);
 }
 
 SkShader* SkShader::CreatePictureShader(SkPicture* src, TileMode tmx, TileMode tmy,
@@ skipping 131 matching lines @@
 #include "SkEmptyShader.h"
 
 void SkEmptyShader::toString(SkString* str) const {
     str->append("SkEmptyShader: (");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif