48661b868f
This allows us to re-enable support for multiple GrContexts in GrBackendTextureImageGenerator. Bug: skia: Change-Id: Ifd6ac1ad81cdfbd1fd986467d8beb359399d6588 Reviewed-on: https://skia-review.googlesource.com/98340 Reviewed-by: Brian Osman <brianosman@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com> Commit-Queue: Greg Daniel <egdaniel@google.com>
631 lines
30 KiB
C++
631 lines
30 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkImage_DEFINED
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#define SkImage_DEFINED
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#include "SkFilterQuality.h"
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#include "SkImageInfo.h"
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#include "SkImageEncoder.h"
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#include "SkRefCnt.h"
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#include "SkScalar.h"
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#include "SkShader.h"
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#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26
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#include <android/hardware_buffer.h>
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#endif
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class SkData;
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class SkCanvas;
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class SkImageGenerator;
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class SkPaint;
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class SkPicture;
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class SkString;
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class SkSurface;
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class GrBackendTexture;
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class GrContext;
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class GrContextThreadSafeProxy;
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class GrTexture;
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/**
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* SkImage is an abstraction for drawing a rectagle of pixels, though the
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* particular type of image could be actually storing its data on the GPU, or
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* as drawing commands (picture or PDF or otherwise), ready to be played back
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* into another canvas.
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*
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* The content of SkImage is always immutable, though the actual storage may
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* change, if for example that image can be re-created via encoded data or
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* other means.
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*
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* SkImage always has a non-zero dimensions. If there is a request to create a new image, either
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* directly or via SkSurface, and either of the requested dimensions are zero, then NULL will be
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* returned.
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*/
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class SK_API SkImage : public SkRefCnt {
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public:
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typedef SkImageInfo Info;
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typedef void* ReleaseContext;
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static sk_sp<SkImage> MakeRasterCopy(const SkPixmap& pixmap);
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static sk_sp<SkImage> MakeRasterData(const Info& info, sk_sp<SkData> pixels, size_t rowBytes);
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typedef void (*RasterReleaseProc)(const void* pixels, ReleaseContext);
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/**
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* Return a new Image referencing the specified pixels. These must remain valid and unchanged
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* until the specified release-proc is called, indicating that Skia no longer has a reference
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* to the pixels.
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*
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* Returns NULL if the requested pixmap info is unsupported.
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*/
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static sk_sp<SkImage> MakeFromRaster(const SkPixmap& pixmap,
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RasterReleaseProc rasterReleaseProc,
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ReleaseContext releaseContext);
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/**
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* Construct a new image from the specified bitmap. If the bitmap is marked immutable, and
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* its pixel memory is shareable, it may be shared instead of copied.
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*/
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static sk_sp<SkImage> MakeFromBitmap(const SkBitmap& bitmap);
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/**
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* Construct a new SkImage based on the given ImageGenerator. Returns NULL on error.
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* This function will always take ownership of the passed generator.
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*
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* If a subset is specified, it must be contained within the generator's bounds.
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*/
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static sk_sp<SkImage> MakeFromGenerator(std::unique_ptr<SkImageGenerator> imageGenerator,
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const SkIRect* subset = nullptr);
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/**
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* Construct a new SkImage based on the specified encoded data. Returns NULL on failure,
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* which can mean that the format of the encoded data was not recognized/supported.
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*
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* If a subset is specified, it must be contained within the encoded data's bounds.
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*/
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static sk_sp<SkImage> MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* subset = nullptr);
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typedef void (*TextureReleaseProc)(ReleaseContext releaseContext);
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/**
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* Create a new image from the specified descriptor. Note - the caller is responsible for
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* managing the lifetime of the underlying platform texture.
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*
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* Will return NULL if the specified backend texture is unsupported.
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*
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* DEPRECATED: This factory is deprecated and clients should use the factory below which takes
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* an SkColorType.
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*/
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static sk_sp<SkImage> MakeFromTexture(GrContext* context,
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const GrBackendTexture& backendTexture,
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GrSurfaceOrigin origin,
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SkAlphaType alphaType,
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sk_sp<SkColorSpace> colorSpace) {
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return MakeFromTexture(context, backendTexture, origin, alphaType, colorSpace, nullptr,
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nullptr);
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}
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/**
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* Create a new image from the GrBackendTexture. The underlying platform texture must stay
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* valid and unaltered until the specified release-proc is invoked, indicating that Skia
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* no longer is holding a reference to it.
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*
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* Will return NULL if the specified backend texture is unsupported.
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*
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* DEPRECATED: This factory is deprecated and clients should use the factory below which takes
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* an SkColorType.
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*/
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static sk_sp<SkImage> MakeFromTexture(GrContext* context,
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const GrBackendTexture& backendTexture,
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GrSurfaceOrigin origin,
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SkAlphaType alphaType,
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sk_sp<SkColorSpace> colorSpace,
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TextureReleaseProc textureReleaseProc,
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ReleaseContext releaseContext);
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/**
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* Create a new image from the specified descriptor. Note - the caller is responsible for
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* managing the lifetime of the underlying platform texture.
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*
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* The GrBackendTexture must have a valid backend format supplied (GrGLTextureInfo::fFormat,
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* GrVkImageInfo::fFormat, etc.) in it. The passed in SkColorType informs skia how it should
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* interpret the backend format supplied by the GrBackendTexture. If the format in the
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* GrBackendTexture is not compitable with the SkColorType, SkAlphaType, and SkColorSpace we
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* will return nullptr.
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*/
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static sk_sp<SkImage> MakeFromTexture(GrContext* context,
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const GrBackendTexture& backendTexture,
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GrSurfaceOrigin origin,
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SkColorType colorType,
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SkAlphaType alphaType,
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sk_sp<SkColorSpace> colorSpace) {
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return MakeFromTexture(context, backendTexture, origin, colorType, alphaType, colorSpace,
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nullptr, nullptr);
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}
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/**
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* Create a new image from the GrBackendTexture. The underlying platform texture must stay
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* valid and unaltered until the specified release-proc is invoked, indicating that Skia
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* no longer is holding a reference to it.
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*
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* The GrBackendTexture must have a valid backend format supplied (GrGLTextureInfo::fFormat,
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* GrVkImageInfo::fFormat, etc.) in it. The passed in SkColorType informs skia how it should
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* interpret the backend format supplied by the GrBackendTexture. If the format in the
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* GrBackendTexture is not compitable with the SkColorType, SkAlphaType, and SkColorSpace we
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* will return nullptr.
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*/
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static sk_sp<SkImage> MakeFromTexture(GrContext* context,
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const GrBackendTexture& backendTexture,
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GrSurfaceOrigin origin,
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SkColorType colorType,
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SkAlphaType alphaType,
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sk_sp<SkColorSpace> colorSpace,
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TextureReleaseProc textureReleaseProc,
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ReleaseContext releaseContext);
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/**
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* Decodes and uploads the encoded data to a GPU backed image using the supplied GrContext.
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* That image can be safely used by other GrContexts, across thread boundaries. The GrContext
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* used here, and the ones used to draw this image later must be in the same GL share group,
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* or use the same Vulkan VkDevice and VkQueue, or otherwise be able to share resources.
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*
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* When the image's ref count reaches zero, the original GrContext will destroy the texture,
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* asynchronously.
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*
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* The texture will be decoded and uploaded to be suitable for use with surfaces that have the
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* supplied destination color space. The color space of the image itself will be determined
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* from the encoded data.
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*/
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static sk_sp<SkImage> MakeCrossContextFromEncoded(GrContext* context, sk_sp<SkData> data,
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bool buildMips, SkColorSpace* dstColorSpace);
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/**
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* Uploads the pixmap to a GPU backed image using the supplied GrContext.
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* That image can be safely used by other GrContexts, across thread boundaries. The GrContext
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* used here, and the ones used to draw this image later must be in the same GL share group,
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* or use the same Vulkan VkDevice and VkQueue, or otherwise be able to share resources.
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*
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* When the image's ref count reaches zero, the original GrContext will destroy the texture,
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* asynchronously.
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*
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* The texture will be processed to be suitable for use with surfaces that have the
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* supplied destination color space. The color space of the image itself will be determined
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* from the pixmap.
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*/
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static sk_sp<SkImage> MakeCrossContextFromPixmap(GrContext* context, const SkPixmap& pixmap,
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bool buildMips, SkColorSpace* dstColorSpace);
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/**
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* Create a new image from the specified descriptor. Note - Skia will delete or recycle the
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* texture when the image is released.
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*
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* Will return NULL if the specified backend texture is unsupported.
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*
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* DEPRECATED: This factory is deprecated and clients should use the factory below which takes
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* an SkColorType.
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*/
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static sk_sp<SkImage> MakeFromAdoptedTexture(GrContext* context,
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const GrBackendTexture& backendTexture,
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GrSurfaceOrigin surfaceOrigin,
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SkAlphaType alphaType = kPremul_SkAlphaType,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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/**
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* Create a new image from the specified descriptor. Note - Skia will delete or recycle the
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* texture when the image is released.
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*
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* The GrBackendTexture must have a valid backend format supplied (GrGLTextureInfo::fFormat,
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* GrVkImageInfo::fFormat, etc.) in it. The passed in SkColorType informs skia how it should
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* interpret the backend format supplied by the GrBackendTexture. If the format in the
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* GrBackendTexture is not compitable with the SkColorType, SkAlphaType, and SkColorSpace we
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* will return nullptr.
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*/
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static sk_sp<SkImage> MakeFromAdoptedTexture(GrContext* context,
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const GrBackendTexture& backendTexture,
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GrSurfaceOrigin surfaceOrigin,
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SkColorType colorType,
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SkAlphaType alphaType = kPremul_SkAlphaType,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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/**
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* Create a new image by copying the pixels from the specified y, u, v textures. The data
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* from the textures is immediately ingested into the image and the textures can be modified or
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* deleted after the function returns. The image will have the dimensions of the y texture.
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*/
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static sk_sp<SkImage> MakeFromYUVTexturesCopy(GrContext* context, SkYUVColorSpace yuvColorSpace,
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const GrBackendObject yuvTextureHandles[3],
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const SkISize yuvSizes[3],
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GrSurfaceOrigin surfaceOrigin,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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/**
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* Create a new image by copying the pixels from the specified y and uv textures. The data
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* from the textures is immediately ingested into the image and the textures can be modified or
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* deleted after the function returns. The image will have the dimensions of the y texture.
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*/
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static sk_sp<SkImage> MakeFromNV12TexturesCopy(GrContext* context,
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SkYUVColorSpace yuvColorSpace,
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const GrBackendObject nv12TextureHandles[2],
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const SkISize nv12Sizes[2],
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GrSurfaceOrigin surfaceOrigin,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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/**
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* Create a new image by copying the pixels from the specified y, u, v textures. The data
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* from the textures is immediately ingested into the image and the textures can be modified or
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* deleted after the function returns. The image will have the dimensions of the y texture.
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*/
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static sk_sp<SkImage> MakeFromYUVTexturesCopy(GrContext* context, SkYUVColorSpace yuvColorSpace,
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const GrBackendTexture yuvTextureHandles[3],
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const SkISize yuvSizes[3],
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GrSurfaceOrigin surfaceOrigin,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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/**
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* Create a new image by copying the pixels from the specified y and uv textures. The data
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* from the textures is immediately ingested into the image and the textures can be modified or
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* deleted after the function returns. The image will have the dimensions of the y texture.
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*/
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static sk_sp<SkImage> MakeFromNV12TexturesCopy(GrContext* context,
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SkYUVColorSpace yuvColorSpace,
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const GrBackendTexture nv12TextureHandles[2],
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const SkISize nv12Sizes[2],
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GrSurfaceOrigin surfaceOrigin,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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enum class BitDepth {
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kU8,
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kF16,
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};
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/**
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* Create a new image from the specified picture.
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* On creation of the SkImage, snap the SkPicture to a particular BitDepth and SkColorSpace.
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*/
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static sk_sp<SkImage> MakeFromPicture(sk_sp<SkPicture> picture, const SkISize& dimensions,
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const SkMatrix* matrix, const SkPaint* paint,
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BitDepth bitDepth,
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sk_sp<SkColorSpace> colorSpace);
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#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26
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/**
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* Create a new image from the an Android hardware buffer.
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* The new image takes a reference on the buffer.
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*/
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static sk_sp<SkImage> MakeFromAHardwareBuffer(AHardwareBuffer* hardwareBuffer,
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SkAlphaType alphaType = kPremul_SkAlphaType,
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sk_sp<SkColorSpace> colorSpace = nullptr);
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#endif
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///////////////////////////////////////////////////////////////////////////////////////////////
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int width() const { return fWidth; }
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int height() const { return fHeight; }
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SkISize dimensions() const { return SkISize::Make(fWidth, fHeight); }
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SkIRect bounds() const { return SkIRect::MakeWH(fWidth, fHeight); }
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uint32_t uniqueID() const { return fUniqueID; }
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SkAlphaType alphaType() const;
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/**
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* Returns the color space of the SkImage.
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*
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* This is the color space that was supplied on creation of the SkImage or a color
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* space that was parsed from encoded data. This color space is not guaranteed to be
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* renderable. Can return nullptr if the SkImage was created without a color space.
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*/
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SkColorSpace* colorSpace() const;
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sk_sp<SkColorSpace> refColorSpace() const;
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/**
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* Returns true fi the image will be drawn as a mask, with no intrinsic color of its own.
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*/
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bool isAlphaOnly() const;
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bool isOpaque() const { return SkAlphaTypeIsOpaque(this->alphaType()); }
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sk_sp<SkShader> makeShader(SkShader::TileMode tileMode1, SkShader::TileMode tileMode2,
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const SkMatrix* localMatrix = nullptr) const;
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/**
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* Helper version of makeShader() that specifies Clamp tilemode.
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*/
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sk_sp<SkShader> makeShader(const SkMatrix* localMatrix = nullptr) const {
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return this->makeShader(SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, localMatrix);
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}
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/**
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* If the image has direct access to its pixels (i.e. they are in local RAM)
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* return true, and if not null, return in the pixmap parameter the info about the
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* images pixels.
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*
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* On failure, return false and ignore the pixmap parameter.
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*/
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bool peekPixels(SkPixmap* pixmap) const;
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// DEPRECATED - currently used by Canvas2DLayerBridge in Chromium.
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GrTexture* getTexture() const;
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/**
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* Returns true if the image is texture backed.
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*/
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bool isTextureBacked() const;
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/**
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* Returns true if the image is able to be drawn to a particular type of device. If context
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* is nullptr, tests for drawability to CPU devices. Otherwise, tests for drawability to a GPU
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* device backed by context.
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*
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* Texture-backed images may become invalid if their underlying GrContext is abandoned. Some
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* generator-backed images may be invalid for CPU and/or GPU.
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*/
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bool isValid(GrContext* context) const;
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/**
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* Retrieves the backend API handle of the texture. If flushPendingGrContextIO then the
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* GrContext will issue to the backend API any deferred IO operations on the texture before
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* returning.
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* If 'origin' is supplied it will be filled in with the origin of the content drawn
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* into the image.
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*/
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GrBackendObject getTextureHandle(bool flushPendingGrContextIO,
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GrSurfaceOrigin* origin = nullptr) const;
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/**
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* Hints to image calls where the system might cache computed intermediates (e.g. the results
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* of decoding or a read-back from the GPU. Passing kAllow signals that the system's default
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* behavior is fine. Passing kDisallow signals that caching should be avoided.
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*/
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enum CachingHint {
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kAllow_CachingHint,
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kDisallow_CachingHint,
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};
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/**
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* Copy the pixels from the image into the specified buffer (pixels + rowBytes),
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* converting them into the requested format (dstInfo). The image pixels are read
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* starting at the specified (srcX,srcY) location.
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*
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* The specified ImageInfo and (srcX,srcY) offset specifies a source rectangle
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*
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* srcR.setXYWH(srcX, srcY, dstInfo.width(), dstInfo.height());
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*
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* srcR is intersected with the bounds of the image. If this intersection is not empty,
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* then we have two sets of pixels (of equal size). Replace the dst pixels with the
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* corresponding src pixels, performing any colortype/alphatype transformations needed
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* (in the case where the src and dst have different colortypes or alphatypes).
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*
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* This call can fail, returning false, for several reasons:
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* - If srcR does not intersect the image bounds.
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* - If the requested colortype/alphatype cannot be converted from the image's types.
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*/
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bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
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int srcX, int srcY, CachingHint cachingHint = kAllow_CachingHint) const;
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bool readPixels(const SkPixmap& dst, int srcX, int srcY,
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CachingHint cachingHint = kAllow_CachingHint) const;
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/**
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* Copy the pixels from this image into the dst pixmap, converting as needed into dst's
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* colortype/alphatype. If the conversion cannot be performed, false is returned.
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*
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* If dst's dimensions differ from the src dimension, the image will be scaled, applying the
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* specified filter-quality.
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*/
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bool scalePixels(const SkPixmap& dst, SkFilterQuality filterQuality,
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CachingHint cachingHint = kAllow_CachingHint) const;
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/**
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* Encode the image's pixels and return the result as SkData. This will ignore any possible
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* existing encoded data (see refEncodedData()), and will always attempt to encode the
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* image using the specified encoded image format.
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*
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* If the image type cannot be encoded, or the requested encoder format is
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* not supported, this will return nullptr.
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*/
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sk_sp<SkData> encodeToData(SkEncodedImageFormat encodedImageFormat, int quality) const;
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/**
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* Encode the image and return the result as SkData. This will attempt to reuse existing
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* encoded data (as returned by refEncodedData). If there is no eisting data, the image
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* will be encoded using PNG. On an error, this returns nullptr.
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*/
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sk_sp<SkData> encodeToData() const;
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/**
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* If the image already has its contents in encoded form (e.g. PNG or JPEG), return that
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* as SkData. If the image does not already has its contents in encoded form, return NULL.
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*
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* Note: to force the image to return its contents as encoded data, use encodeToData(...).
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*/
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sk_sp<SkData> refEncodedData() const;
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const char* toString(SkString* string) const;
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/**
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* Return a new image that is a subset of this image. The underlying implementation may
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* share the pixels, or it may make a copy.
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*
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* If subset does not intersect the bounds of this image, or the copy/share cannot be made,
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* NULL will be returned.
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*/
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sk_sp<SkImage> makeSubset(const SkIRect& subset) const;
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/**
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* Ensures that an image is backed by a texture (when GrContext is non-null), suitable for use
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* with surfaces that have the supplied destination color space. If no transformation is
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* required, the returned image may be the same as this image. If this image is from a
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* different GrContext, this will fail.
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|
*/
|
|
sk_sp<SkImage> makeTextureImage(GrContext* context, SkColorSpace* dstColorSpace) const;
|
|
|
|
/**
|
|
* If the image is texture-backed this will make a raster copy of it (or nullptr if reading back
|
|
* the pixels fails). Otherwise, it returns the original image.
|
|
*/
|
|
sk_sp<SkImage> makeNonTextureImage() const;
|
|
|
|
/**
|
|
* If this image is already backed by raster (i.e. peekPixels would succeed), then this just
|
|
* returns itself. If not, this attempts to create a raster version of this image and returns
|
|
* that, or nullptr if that fails.
|
|
*/
|
|
sk_sp<SkImage> makeRasterImage() const;
|
|
|
|
/**
|
|
* Apply a given image filter to this image, and return the filtered result.
|
|
*
|
|
* The subset represents the active portion of this image. The return value is similarly an
|
|
* SkImage, with an active subset (outSubset). This is usually used with texture-backed
|
|
* images, where the texture may be approx-match and thus larger than the required size.
|
|
*
|
|
* clipBounds constrains the device-space extent of the image which may be produced to the
|
|
* given rect.
|
|
*
|
|
* offset is the amount to translate the resulting image relative to the src when it is drawn.
|
|
* This is an out-param.
|
|
*
|
|
* If the result image cannot be created, or the result would be transparent black, null
|
|
* is returned, in which case the offset and outSubset parameters should be ignored by the
|
|
* caller.
|
|
*/
|
|
sk_sp<SkImage> makeWithFilter(const SkImageFilter* filter, const SkIRect& subset,
|
|
const SkIRect& clipBounds, SkIRect* outSubset,
|
|
SkIPoint* offset) const;
|
|
|
|
/** Drawing params for which a deferred texture image data should be optimized. */
|
|
struct DeferredTextureImageUsageParams {
|
|
DeferredTextureImageUsageParams(const SkMatrix matrix, const SkFilterQuality quality,
|
|
int preScaleMipLevel)
|
|
: fMatrix(matrix), fQuality(quality), fPreScaleMipLevel(preScaleMipLevel) {}
|
|
SkMatrix fMatrix;
|
|
SkFilterQuality fQuality;
|
|
int fPreScaleMipLevel;
|
|
};
|
|
|
|
/**
|
|
* This method allows clients to capture the data necessary to turn a SkImage into a texture-
|
|
* backed image. If the original image is codec-backed this will decode into a format optimized
|
|
* for the context represented by the proxy. This method is thread safe with respect to the
|
|
* GrContext whence the proxy came. Clients allocate and manage the storage of the deferred
|
|
* texture data and control its lifetime. No cleanup is required, thus it is safe to simply free
|
|
* the memory out from under the data.
|
|
*
|
|
* The same method is used both for getting the size necessary for pre-uploaded texture data
|
|
* and for retrieving the data. The params array represents the set of draws over which to
|
|
* optimize the pre-upload data.
|
|
*
|
|
* When called with a null buffer this returns the size that the client must allocate in order
|
|
* to create deferred texture data for this image (or zero if this is an inappropriate
|
|
* candidate). The buffer allocated by the client should be 8 byte aligned.
|
|
*
|
|
* When buffer is not null this fills in the deferred texture data for this image in the
|
|
* provided buffer (assuming this is an appropriate candidate image and the buffer is
|
|
* appropriately aligned). Upon success the size written is returned, otherwise 0.
|
|
*
|
|
* dstColorSpace is the color space of the surface where this texture will ultimately be used.
|
|
* If the method determines that mip-maps are needed, this helps determine the correct strategy
|
|
* for building them (gamma-correct or not).
|
|
*
|
|
* dstColorType is the color type of the surface where this texture will ultimately be used.
|
|
* This determines the format with which the image will be uploaded to the GPU. If dstColorType
|
|
* does not support color spaces (low bit depth types such as ARGB_4444), then dstColorSpace
|
|
* must be null.
|
|
*/
|
|
size_t getDeferredTextureImageData(const GrContextThreadSafeProxy& contextThreadSafeProxy,
|
|
const DeferredTextureImageUsageParams deferredTextureImageUsageParams[],
|
|
int paramCnt,
|
|
void* buffer,
|
|
SkColorSpace* dstColorSpace = nullptr,
|
|
SkColorType dstColorType = kN32_SkColorType) const;
|
|
|
|
/**
|
|
* Returns a texture-backed image from data produced in SkImage::getDeferredTextureImageData.
|
|
* The context must be the context that provided the proxy passed to
|
|
* getDeferredTextureImageData.
|
|
*/
|
|
static sk_sp<SkImage> MakeFromDeferredTextureImageData(GrContext* context, const void* data,
|
|
SkBudgeted budgeted);
|
|
|
|
typedef std::function<void(GrBackendTexture)> BackendTextureReleaseProc;
|
|
|
|
/**
|
|
* Creates a GrBackendTexture from the provided SkImage. Returns true on success. The
|
|
* GrBackendTexture and BackendTextureReleaseProc are populated on success. It is the callers
|
|
* responsibility to call the BackendTextureReleaseProc once they have deleted the texture.
|
|
*
|
|
* Note that the BackendTextureReleaseProc allows Skia to clean up auxiliary data related
|
|
* to the GrBackendTexture, and is not a substitute for the client deleting the GrBackendTexture
|
|
* themselves.
|
|
*
|
|
* Note that if the SkImage is both texture backed and unowned (the only reference is
|
|
* std::moved into this function), Skia can return the texture directly, avoiding any
|
|
* conversions or copies.
|
|
*
|
|
* If the SkImage is not texture backed, this function will generate a texture with the image's
|
|
* contents and return that.
|
|
*/
|
|
static bool MakeBackendTextureFromSkImage(GrContext* context,
|
|
sk_sp<SkImage> image,
|
|
GrBackendTexture* backendTexture,
|
|
BackendTextureReleaseProc* backendTextureReleaseProc);
|
|
|
|
|
|
// Helper functions to convert to SkBitmap
|
|
|
|
enum LegacyBitmapMode {
|
|
kRO_LegacyBitmapMode,
|
|
kRW_LegacyBitmapMode,
|
|
};
|
|
|
|
/**
|
|
* Attempt to create a bitmap with the same pixels as the image. The result will always be
|
|
* a raster-backed bitmap (texture-backed bitmaps are DEPRECATED, and not supported here).
|
|
*
|
|
* If the mode is kRO (read-only), the resulting bitmap will be marked as immutable.
|
|
*
|
|
* On succcess, returns true. On failure, returns false and the bitmap parameter will be reset
|
|
* to empty.
|
|
*/
|
|
bool asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode legacyBitmapMode) const;
|
|
|
|
/**
|
|
* Returns true if the image is backed by an image-generator or other src that creates
|
|
* (and caches) its pixels / texture on-demand.
|
|
*/
|
|
bool isLazyGenerated() const;
|
|
|
|
/**
|
|
* If |target| is supported, returns an SkImage in the |target| color space.
|
|
* Otherwise, returns nullptr.
|
|
*
|
|
* This will leave the image as is if it already in the |target| color space.
|
|
* Otherwise, it will convert the pixels from the src color space to the |target|
|
|
* color space. If this->colorSpace() is nullptr, the src color space will be
|
|
* treated as sRGB.
|
|
*
|
|
* If |premulBehavior| is kIgnore, any premultiplication or unpremultiplication will
|
|
* be performed in the gamma encoded space. If it is kRespect, premultiplication is
|
|
* assumed to be linear.
|
|
*/
|
|
sk_sp<SkImage> makeColorSpace(sk_sp<SkColorSpace> target,
|
|
SkTransferFunctionBehavior premulBehavior) const;
|
|
|
|
private:
|
|
SkImage(int width, int height, uint32_t uniqueID);
|
|
friend class SkImage_Base;
|
|
|
|
static sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&,
|
|
const GrMipLevel texels[], int mipLevelCount,
|
|
SkBudgeted, SkDestinationSurfaceColorMode);
|
|
|
|
const int fWidth;
|
|
const int fHeight;
|
|
const uint32_t fUniqueID;
|
|
|
|
typedef SkRefCnt INHERITED;
|
|
};
|
|
|
|
#endif
|