diff options
Diffstat (limited to 'base/gfx/bitmap_platform_device_linux.h')
| -rw-r--r-- | base/gfx/bitmap_platform_device_linux.h | 85 |
1 files changed, 3 insertions, 82 deletions
diff --git a/base/gfx/bitmap_platform_device_linux.h b/base/gfx/bitmap_platform_device_linux.h index 629fd1d..3db11cb 100644 --- a/base/gfx/bitmap_platform_device_linux.h +++ b/base/gfx/bitmap_platform_device_linux.h @@ -5,87 +5,8 @@ #ifndef BASE_GFX_BITMAP_PLATFORM_DEVICE_LINUX_H_ #define BASE_GFX_BITMAP_PLATFORM_DEVICE_LINUX_H_ -#include "base/gfx/platform_device_linux.h" -#include "base/ref_counted.h" - -typedef struct _cairo_surface cairo_surface_t; - -// ----------------------------------------------------------------------------- -// Image byte ordering on Linux: -// -// Pixels are packed into 32-bit words these days. Even for 24-bit images, -// often 8-bits will be left unused for alignment reasons. Thus, when you see -// ARGB as the byte order you have to wonder if that's in memory order or -// little-endian order. Here I'll write A.R.G.B to specifiy the memory order. -// -// GdkPixbuf's provide a nice backing store and defaults to R.G.B.A order. -// They'll do the needed byte swapping to match the X server when drawn. -// -// Skia can be controled in skia/include/corecg/SkUserConfig.h (see bits about -// SK_R32_SHIFT). For Linux we define it to be ARGB in registers. For little -// endian machines that means B.G.R.A in memory. -// -// The image loaders are controlled in -// webkit/port/platform/image-decoders/ImageDecoder.h (see setRGBA). These are -// also configured for ARGB in registers. -// -// Cairo's only 32-bit mode is ARGB in registers. -// -// X servers commonly have a 32-bit visual with xRGB in registers (since they -// typically don't do alpha blending of drawables at the user level. Composite -// extensions aside.) -// -// We don't use GdkPixbuf because its byte order differs from the rest. Most -// importantly, it differs from Cairo which, being a system library, is -// something that we can't easily change. -// ----------------------------------------------------------------------------- - -namespace gfx { - -// ----------------------------------------------------------------------------- -// This is the Linux bitmap backing for Skia. We create a Cairo image surface -// to store the backing buffer. This buffer is BGRA in memory (on little-endian -// machines). -// -// For now we are also using Cairo to paint to the Drawables so we provide an -// accessor for getting the surface. -// -// This is all quite ok for test_shell. In the future we will want to use -// shared memory between the renderer and the main process at least. In this -// case we'll probably create the buffer from a precreated region of memory. -// ----------------------------------------------------------------------------- -class BitmapPlatformDeviceLinux : public PlatformDeviceLinux { - // A reference counted cairo surface - class BitmapPlatformDeviceLinuxData; - - public: - /// Static constructor. I don't understand this, it's just a copy of the mac - static BitmapPlatformDeviceLinux* Create(int width, int height, - bool is_opaque); - - // Create a BitmapPlatformDeviceLinux from an already constructed bitmap; - // you should probably be using Create(). This may become private later if - // we ever have to share state between some native drawing UI and Skia, like - // the Windows and Mac versions of this class do. - // - // This object takes ownership of @data. - BitmapPlatformDeviceLinux(const SkBitmap& other, - BitmapPlatformDeviceLinuxData* data); - virtual ~BitmapPlatformDeviceLinux(); - BitmapPlatformDeviceLinux& operator=(const BitmapPlatformDeviceLinux& other); - - // A stub copy constructor. Needs to be properly implemented. - BitmapPlatformDeviceLinux(const BitmapPlatformDeviceLinux& other); - - // Bitmaps aren't vector graphics. - virtual bool IsVectorial() { return false; } - - cairo_surface_t* surface() const; - - private: - scoped_refptr<BitmapPlatformDeviceLinuxData> data_; -}; - -} // namespace gfx +// TODO(brettw) this file should be removed and the includes changed to this +// new location. +#include "webkit/port/platform/graphics/skia/public/BitmapPlatformDeviceLinux.h" #endif // BASE_GFX_BITMAP_PLATFORM_DEVICE_LINUX_H_ |