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      1 /*
      2  * Copyright (c) 2013, Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "platform/graphics/skia/GaneshUtils.h"
     33 
     34 #include "third_party/skia/include/core/SkCanvas.h"
     35 #include "third_party/skia/include/gpu/SkGrPixelRef.h"
     36 
     37 namespace WebCore {
     38 
     39 bool ensureTextureBackedSkBitmap(GrContext* gr, SkBitmap& bitmap, const IntSize& size, GrSurfaceOrigin origin, GrPixelConfig config)
     40 {
     41     if (!bitmap.getTexture() || bitmap.width() != size.width() || bitmap.height() != size.height()) {
     42         if (!gr)
     43             return false;
     44         GrTextureDesc desc;
     45         desc.fConfig = config;
     46         desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
     47         desc.fSampleCnt = 0;
     48         desc.fOrigin = origin;
     49         desc.fWidth = size.width();
     50         desc.fHeight = size.height();
     51         SkAutoTUnref<GrTexture> texture(gr->createUncachedTexture(desc, 0, 0));
     52         if (!texture.get())
     53             return false;
     54 
     55         SkImageInfo info;
     56         info.fWidth = desc.fWidth;
     57         info.fHeight = desc.fHeight;
     58         info.fColorType = kPMColor_SkColorType;
     59         info.fAlphaType = kPremul_SkAlphaType;
     60 
     61         SkGrPixelRef* pixelRef = SkNEW_ARGS(SkGrPixelRef, (info, texture.get()));
     62         if (!pixelRef)
     63             return false;
     64         bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
     65         bitmap.setPixelRef(pixelRef, 0)->unref();
     66     }
     67 
     68     return true;
     69 }
     70 
     71 } // namespace WebCore
     72