change SkDraw and all Blitters to use pixmap instead of bitmap

src/gpu/GrSWMaskHelper.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSWMaskHelper.h"
 
 #include "GrPipelineBuilder.h"
@@ skipping 128 matching lines @@
             paint.setStrokeWidth(stroke.getWidth());
         }
     }
     paint.setAntiAlias(antiAlias);
 
     SkTBlitterAllocator allocator;
     SkBlitter* blitter = NULL;
     if (kBlitter_CompressionMode == fCompressionMode) {
         SkASSERT(fCompressedBuffer.get());
         blitter = SkTextureCompressor::CreateBlitterForFormat(
-            fBM.width(), fBM.height(), fCompressedBuffer.get(), &allocator, fCompressedFormat);
+            fPixels.width(), fPixels.height(), fCompressedBuffer.get(), &allocator,
+                                                              fCompressedFormat);
     }
 
     if (SkRegion::kReplace_Op == op && 0xFF == alpha) {
         SkASSERT(0xFF == paint.getAlpha());
         fDraw.drawPathCoverage(path, paint, blitter);
     } else {
         paint.setXfermodeMode(op_to_mode(op));
         paint.setColor(SkColorSetARGB(alpha, alpha, alpha, alpha));
         fDraw.drawPath(path, paint, blitter);
     }
@@ skipping 35 matching lines @@
             int cmpSz = SkTextureCompressor::GetCompressedDataSize(
                 fCompressedFormat, cmpWidth, cmpHeight);
 
             SkASSERT(cmpSz > 0);
             SkASSERT(NULL == fCompressedBuffer.get());
             fCompressedBuffer.reset(cmpSz);
             fCompressionMode = kBlitter_CompressionMode;
         }
     } 
 
+    sk_bzero(&fDraw, sizeof(fDraw));
+
     // If we don't have a custom blitter, then we either need a bitmap to compress
     // from or a bitmap that we're going to use as a texture. In any case, we should
     // allocate the pixels for a bitmap
     const SkImageInfo bmImageInfo = SkImageInfo::MakeA8(cmpWidth, cmpHeight);
     if (kBlitter_CompressionMode != fCompressionMode) {
-        if (!fBM.tryAllocPixels(bmImageInfo)) {
+        if (!fPixels.tryAlloc(bmImageInfo)) {
             return false;
         }
-
-        sk_bzero(fBM.getPixels(), fBM.getSafeSize());
+        fPixels.erase(0);
     } else {
         // Otherwise, we just need to remember how big the buffer is...
-        fBM.setInfo(bmImageInfo);
+        fPixels.reset(bmImageInfo);
     }
-
-    sk_bzero(&fDraw, sizeof(fDraw));
-
+    fDraw.fDst      = fPixels;
     fRasterClip.setRect(bounds);
-    fDraw.fRC    = &fRasterClip;
-    fDraw.fClip  = &fRasterClip.bwRgn();
-    fDraw.fMatrix = &fMatrix;
-    fDraw.fBitmap = &fBM;
+    fDraw.fRC       = &fRasterClip;
+    fDraw.fClip     = &fRasterClip.bwRgn();
+    fDraw.fMatrix   = &fMatrix;
     return true;
 }
 
 /**
  * Get a texture (from the texture cache) of the correct size & format.
  */
 GrTexture* GrSWMaskHelper::createTexture() {
     GrSurfaceDesc desc;
-    desc.fWidth = fBM.width();
-    desc.fHeight = fBM.height();
+    desc.fWidth = fPixels.width();
+    desc.fHeight = fPixels.height();
     desc.fConfig = kAlpha_8_GrPixelConfig;
 
     if (kNone_CompressionMode != fCompressionMode) {
 
 #ifdef SK_DEBUG
         int dimX, dimY;
         SkTextureCompressor::GetBlockDimensions(fCompressedFormat, &dimX, &dimY);
         SkASSERT((desc.fWidth % dimX) == 0);
         SkASSERT((desc.fHeight % dimY) == 0);
 #endif
@@ skipping 19 matching lines @@
     texture->writePixels(0, 0, desc.fWidth, desc.fHeight,
                          desc.fConfig, data, rowbytes,
                          reuseScratch ? 0 : GrContext::kDontFlush_PixelOpsFlag);
 }
 
 void GrSWMaskHelper::compressTextureData(GrTexture *texture, const GrSurfaceDesc& desc) {
 
     SkASSERT(GrPixelConfigIsCompressed(desc.fConfig));
     SkASSERT(fmt_to_config(fCompressedFormat) == desc.fConfig);
 
-    SkAutoDataUnref cmpData(SkTextureCompressor::CompressBitmapToFormat(fBM, fCompressedFormat));
+    SkAutoDataUnref cmpData(SkTextureCompressor::CompressBitmapToFormat(fPixels,
+                                                                        fCompressedFormat));
     SkASSERT(cmpData);
 
     this->sendTextureData(texture, desc, cmpData->data(), 0);
 }
 
 /**
  * Move the result of the software mask generation back to the gpu
  */
 void GrSWMaskHelper::toTexture(GrTexture *texture) {
-    SkAutoLockPixels alp(fBM);
-
     GrSurfaceDesc desc;
-    desc.fWidth = fBM.width();
-    desc.fHeight = fBM.height();
+    desc.fWidth = fPixels.width();
+    desc.fHeight = fPixels.height();
     desc.fConfig = texture->config();
         
     // First see if we should compress this texture before uploading.
     switch (fCompressionMode) {
         case kNone_CompressionMode:
-            this->sendTextureData(texture, desc, fBM.getPixels(), fBM.rowBytes());
+            this->sendTextureData(texture, desc, fPixels.addr(), fPixels.rowBytes());
             break;
 
         case kCompress_CompressionMode:
             this->compressTextureData(texture, desc);
             break;
 
         case kBlitter_CompressionMode:
             SkASSERT(fCompressedBuffer.get());
             this->sendTextureData(texture, desc, fCompressedBuffer.get(), 0);
             break;
     }
 }
 
 /**
  * Convert mask generation results to a signed distance field
  */
 void GrSWMaskHelper::toSDF(unsigned char* sdf) {
-    SkAutoLockPixels alp(fBM);
-    
-    SkGenerateDistanceFieldFromA8Image(sdf, (const unsigned char*)fBM.getPixels(),
-                                       fBM.width(), fBM.height(), fBM.rowBytes());
+    SkGenerateDistanceFieldFromA8Image(sdf, (const unsigned char*)fPixels.addr(),
+                                       fPixels.width(), fPixels.height(), fPixels.rowBytes());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 /**
  * Software rasterizes path to A8 mask (possibly using the context's matrix)
  * and uploads the result to a scratch texture. Returns the resulting
  * texture on success; NULL on failure.
  */
 GrTexture* GrSWMaskHelper::DrawPathMaskToTexture(GrContext* context,
                                                  const SkPath& path,
@@ skipping 44 matching lines @@
     maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop));
 
     pipelineBuilder->addCoverageProcessor(
                          GrSimpleTextureEffect::Create(texture,
                                                        maskMatrix,
                                                        GrTextureParams::kNone_FilterMode,
                                                        kDevice_GrCoordSet))->unref();
 
     target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), dstRect, NULL, &invert);
 }