mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 13:45:27 +00:00
250 lines
10 KiB
C++
250 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_image_SurfacePipeFactory_h
|
|
#define mozilla_image_SurfacePipeFactory_h
|
|
|
|
#include "SurfacePipe.h"
|
|
#include "SurfaceFilters.h"
|
|
|
|
namespace mozilla {
|
|
namespace image {
|
|
|
|
namespace detail {
|
|
|
|
/**
|
|
* FilterPipeline is a helper template for SurfacePipeFactory that determines
|
|
* the full type of the sequence of SurfaceFilters that a sequence of
|
|
* configuration structs corresponds to. To make this work, all configuration
|
|
* structs must include a typedef 'Filter' that identifies the SurfaceFilter
|
|
* they configure.
|
|
*/
|
|
template <typename... Configs>
|
|
struct FilterPipeline;
|
|
|
|
template <typename Config, typename... Configs>
|
|
struct FilterPipeline<Config, Configs...>
|
|
{
|
|
typedef typename Config::template Filter<typename FilterPipeline<Configs...>::Type> Type;
|
|
};
|
|
|
|
template <typename Config>
|
|
struct FilterPipeline<Config>
|
|
{
|
|
typedef typename Config::Filter Type;
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
/**
|
|
* Flags for SurfacePipeFactory, used in conjuction with the factory functions
|
|
* in SurfacePipeFactory to enable or disable various SurfacePipe
|
|
* functionality.
|
|
*/
|
|
enum class SurfacePipeFlags
|
|
{
|
|
DEINTERLACE = 1 << 0, // If set, deinterlace the image.
|
|
|
|
ADAM7_INTERPOLATE = 1 << 1, // If set, the caller is deinterlacing the
|
|
// image using ADAM7, and we may want to
|
|
// interpolate it for better intermediate results.
|
|
|
|
FLIP_VERTICALLY = 1 << 2, // If set, flip the image vertically.
|
|
|
|
PROGRESSIVE_DISPLAY = 1 << 3 // If set, we expect the image to be displayed
|
|
// progressively. This enables features that
|
|
// result in a better user experience for
|
|
// progressive display but which may be more
|
|
// computationally expensive.
|
|
};
|
|
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(SurfacePipeFlags)
|
|
|
|
class SurfacePipeFactory
|
|
{
|
|
public:
|
|
/**
|
|
* Creates and initializes a normal (i.e., non-paletted) SurfacePipe.
|
|
*
|
|
* @param aDecoder The decoder whose current frame the SurfacePipe will write
|
|
* to.
|
|
* @param aFrameNum Which frame the SurfacePipe will write to. This will be 0
|
|
* for non-animated images.
|
|
* @param aInputSize The original size of the image.
|
|
* @param aOutputSize The size the SurfacePipe should output. Must be the same
|
|
* as @aInputSize or smaller. If smaller, the image will be
|
|
* downscaled during decoding.
|
|
* @param aFrameRect The portion of the image that actually contains data.
|
|
* @param aFormat The surface format of the image; generally B8G8R8A8 or
|
|
* B8G8R8X8.
|
|
* @param aFlags Flags enabling or disabling various functionality for the
|
|
* SurfacePipe; see the SurfacePipeFlags documentation for more
|
|
* information.
|
|
*
|
|
* @return A SurfacePipe if the parameters allowed one to be created
|
|
* successfully, or Nothing() if the SurfacePipe could not be
|
|
* initialized.
|
|
*/
|
|
static Maybe<SurfacePipe>
|
|
CreateSurfacePipe(Decoder* aDecoder,
|
|
uint32_t aFrameNum,
|
|
const nsIntSize& aInputSize,
|
|
const nsIntSize& aOutputSize,
|
|
const nsIntRect& aFrameRect,
|
|
gfx::SurfaceFormat aFormat,
|
|
SurfacePipeFlags aFlags)
|
|
{
|
|
const bool deinterlace = bool(aFlags & SurfacePipeFlags::DEINTERLACE);
|
|
const bool flipVertically = bool(aFlags & SurfacePipeFlags::FLIP_VERTICALLY);
|
|
const bool progressiveDisplay = bool(aFlags & SurfacePipeFlags::PROGRESSIVE_DISPLAY);
|
|
const bool downscale = aInputSize != aOutputSize;
|
|
const bool removeFrameRect =
|
|
!aFrameRect.IsEqualEdges(nsIntRect(0, 0, aInputSize.width, aInputSize.height));
|
|
|
|
// Don't interpolate if we're sure we won't show this surface to the user
|
|
// until it's completely decoded. The final pass of an ADAM7 image doesn't
|
|
// need interpolation, so we only need to interpolate if we'll be displaying
|
|
// the image while it's still being decoded.
|
|
const bool adam7Interpolate = bool(aFlags & SurfacePipeFlags::ADAM7_INTERPOLATE) &&
|
|
progressiveDisplay;
|
|
|
|
if (deinterlace && adam7Interpolate) {
|
|
MOZ_ASSERT_UNREACHABLE("ADAM7 deinterlacing is handled by libpng");
|
|
return Nothing();
|
|
}
|
|
|
|
// Construct configurations for the SurfaceFilters. Note that the order of
|
|
// these filters is significant. We want to deinterlace or interpolate raw
|
|
// input rows, before any other transformations, and we want to remove the
|
|
// frame rect (which may involve adding blank rows or columns to the image)
|
|
// before any downscaling, so that the new rows and columns are taken into
|
|
// account.
|
|
DeinterlacingConfig<uint32_t> deinterlacingConfig { progressiveDisplay };
|
|
ADAM7InterpolatingConfig interpolatingConfig;
|
|
RemoveFrameRectConfig removeFrameRectConfig { aFrameRect };
|
|
DownscalingConfig downscalingConfig { aInputSize, aFormat };
|
|
SurfaceConfig surfaceConfig { aDecoder, aFrameNum, aOutputSize,
|
|
aFormat, flipVertically };
|
|
|
|
Maybe<SurfacePipe> pipe;
|
|
|
|
if (downscale) {
|
|
if (removeFrameRect) {
|
|
if (deinterlace) {
|
|
pipe = MakePipe(deinterlacingConfig, removeFrameRectConfig,
|
|
downscalingConfig, surfaceConfig);
|
|
} else if (adam7Interpolate) {
|
|
pipe = MakePipe(interpolatingConfig, removeFrameRectConfig,
|
|
downscalingConfig, surfaceConfig);
|
|
} else { // (deinterlace and adam7Interpolate are false)
|
|
pipe = MakePipe(removeFrameRectConfig, downscalingConfig, surfaceConfig);
|
|
}
|
|
} else { // (removeFrameRect is false)
|
|
if (deinterlace) {
|
|
pipe = MakePipe(deinterlacingConfig, downscalingConfig, surfaceConfig);
|
|
} else if (adam7Interpolate) {
|
|
pipe = MakePipe(interpolatingConfig, downscalingConfig, surfaceConfig);
|
|
} else { // (deinterlace and adam7Interpolate are false)
|
|
pipe = MakePipe(downscalingConfig, surfaceConfig);
|
|
}
|
|
}
|
|
} else { // (downscale is false)
|
|
if (removeFrameRect) {
|
|
if (deinterlace) {
|
|
pipe = MakePipe(deinterlacingConfig, removeFrameRectConfig, surfaceConfig);
|
|
} else if (adam7Interpolate) {
|
|
pipe = MakePipe(interpolatingConfig, removeFrameRectConfig, surfaceConfig);
|
|
} else { // (deinterlace and adam7Interpolate are false)
|
|
pipe = MakePipe(removeFrameRectConfig, surfaceConfig);
|
|
}
|
|
} else { // (removeFrameRect is false)
|
|
if (deinterlace) {
|
|
pipe = MakePipe(deinterlacingConfig, surfaceConfig);
|
|
} else if (adam7Interpolate) {
|
|
pipe = MakePipe(interpolatingConfig, surfaceConfig);
|
|
} else { // (deinterlace and adam7Interpolate are false)
|
|
pipe = MakePipe(surfaceConfig);
|
|
}
|
|
}
|
|
}
|
|
|
|
return pipe;
|
|
}
|
|
|
|
/**
|
|
* Creates and initializes a paletted SurfacePipe.
|
|
*
|
|
* XXX(seth): We'll remove all support for paletted surfaces in bug 1247520,
|
|
* which means we can remove CreatePalettedSurfacePipe() entirely.
|
|
*
|
|
* @param aDecoder The decoder whose current frame the SurfacePipe will write
|
|
* to.
|
|
* @param aFrameNum Which frame the SurfacePipe will write to. This will be 0
|
|
* for non-animated images.
|
|
* @param aInputSize The original size of the image.
|
|
* @param aFrameRect The portion of the image that actually contains data.
|
|
* @param aFormat The surface format of the image; generally B8G8R8A8 or
|
|
* B8G8R8X8.
|
|
* @param aPaletteDepth The palette depth of the image.
|
|
* @param aFlags Flags enabling or disabling various functionality for the
|
|
* SurfacePipe; see the SurfacePipeFlags documentation for more
|
|
* information.
|
|
*
|
|
* @return A SurfacePipe if the parameters allowed one to be created
|
|
* successfully, or Nothing() if the SurfacePipe could not be
|
|
* initialized.
|
|
*/
|
|
static Maybe<SurfacePipe>
|
|
CreatePalettedSurfacePipe(Decoder* aDecoder,
|
|
uint32_t aFrameNum,
|
|
const nsIntSize& aInputSize,
|
|
const nsIntRect& aFrameRect,
|
|
gfx::SurfaceFormat aFormat,
|
|
uint8_t aPaletteDepth,
|
|
SurfacePipeFlags aFlags)
|
|
{
|
|
const bool deinterlace = bool(aFlags & SurfacePipeFlags::DEINTERLACE);
|
|
const bool flipVertically = bool(aFlags & SurfacePipeFlags::FLIP_VERTICALLY);
|
|
const bool progressiveDisplay = bool(aFlags & SurfacePipeFlags::PROGRESSIVE_DISPLAY);
|
|
|
|
// Construct configurations for the SurfaceFilters.
|
|
DeinterlacingConfig<uint8_t> deinterlacingConfig { progressiveDisplay };
|
|
PalettedSurfaceConfig palettedSurfaceConfig { aDecoder, aFrameNum, aInputSize,
|
|
aFrameRect, aFormat, aPaletteDepth,
|
|
flipVertically };
|
|
|
|
Maybe<SurfacePipe> pipe;
|
|
|
|
if (deinterlace) {
|
|
pipe = MakePipe(deinterlacingConfig, palettedSurfaceConfig);
|
|
} else {
|
|
pipe = MakePipe(palettedSurfaceConfig);
|
|
}
|
|
|
|
return pipe;
|
|
}
|
|
|
|
private:
|
|
template <typename... Configs>
|
|
static Maybe<SurfacePipe>
|
|
MakePipe(Configs... aConfigs)
|
|
{
|
|
auto pipe = MakeUnique<typename detail::FilterPipeline<Configs...>::Type>();
|
|
nsresult rv = pipe->Configure(aConfigs...);
|
|
if (NS_FAILED(rv)) {
|
|
return Nothing();
|
|
}
|
|
|
|
return Some(SurfacePipe { Move(pipe) } );
|
|
}
|
|
|
|
virtual ~SurfacePipeFactory() = 0;
|
|
};
|
|
|
|
} // namespace image
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_image_SurfacePipeFactory_h
|