skia/ext/bitmap_platform_device.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_H_
   6 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_H_
   7
   8 // This file provides an easy way to include the appropriate
   9 // BitmapPlatformDevice header file for your platform.
  10
  11 #if defined(WIN32)
  12 #include "skia/ext/bitmap_platform_device_win.h"
  13 #elif defined(__APPLE__)
  14 #include "skia/ext/bitmap_platform_device_mac.h"
  15 #elif defined(USE_CAIRO)
  16 #include "skia/ext/bitmap_platform_device_cairo.h"
  17 #else
  18 #include "skia/ext/bitmap_platform_device_skia.h"
  19 #endif
  20
  21 namespace skia {
  22     // Returns true if it is unsafe to attempt to allocate an offscreen buffer
  23     // given these dimensions.
  24     inline bool RasterDeviceTooBigToAllocate(int width, int height) {
  25
  26 #ifndef SKIA_EXT_RASTER_DEVICE_ALLOCATION_MAX
  27 #define SKIA_EXT_RASTER_DEVICE_ALLOCATION_MAX    (2 * 256 * 1024 * 1024)
  28 #endif
  29
  30     int bytesPerPixel = 4;
  31     int64_t bytes = (int64_t)width * height * bytesPerPixel;
  32     return bytes > SKIA_EXT_RASTER_DEVICE_ALLOCATION_MAX;
  33   }
  34 }
  35
  36 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_H_