Line data    Source code

       1             : /* This Source Code Form is subject to the terms of the Mozilla Public
       2             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       3             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       4             : 
       5             : #include "Scale.h"
       6             : 
       7             : #ifdef USE_SKIA
       8             : #include "HelpersSkia.h"
       9             : #include "skia/src/core/SkBitmapScaler.h"
      10             : #endif
      11             : 
      12             : namespace mozilla {
      13             : namespace gfx {
      14             : 
      15           0 : bool Scale(uint8_t* srcData, int32_t srcWidth, int32_t srcHeight, int32_t srcStride,
      16             :            uint8_t* dstData, int32_t dstWidth, int32_t dstHeight, int32_t dstStride,
      17             :            SurfaceFormat format)
      18             : {
      19             : #ifdef USE_SKIA
      20           0 :   SkPixmap srcPixmap(MakeSkiaImageInfo(IntSize(srcWidth, srcHeight), format),
      21           0 :                      srcData, srcStride);
      22             : 
      23             :   // Rescaler is compatible with N32 only. Convert to N32 if needed.
      24           0 :   SkBitmap tmpBitmap;
      25           0 :   if (srcPixmap.colorType() != kN32_SkColorType) {
      26           0 :     if (!tmpBitmap.tryAllocPixels(SkImageInfo::MakeN32Premul(srcWidth, srcHeight)) ||
      27           0 :         !tmpBitmap.writePixels(srcPixmap) ||
      28           0 :         !tmpBitmap.peekPixels(&srcPixmap)) {
      29           0 :       return false;
      30             :     }
      31             :   }
      32             : 
      33           0 :   SkPixmap dstPixmap(SkImageInfo::MakeN32Premul(dstWidth, dstHeight), dstData, dstStride);
      34           0 :   return SkBitmapScaler::Resize(dstPixmap, srcPixmap, SkBitmapScaler::RESIZE_LANCZOS3);
      35             : #else
      36             :   return false;
      37             : #endif
      38             : }
      39             : 
      40             : } // namespace gfx
      41             : } // namespace mozilla