| #Topic Image |
| #Alias Image_Reference |
| |
| #Class SkImage |
| |
| Image describes a two dimensional array of pixels to draw. The pixels may be |
| unencoded in a Raster_Bitmap, encoded in a Picture or compressed data stream, |
| or located in GPU memory as a GPU_Texture. |
| |
| Image cannot be modified after it is created. Image may allocate additional |
| storage as needed; for instance, an encoded Image may decode when drawn. |
| |
| Image width and height are greater than zero. Creating an Image with zero width |
| or height returns Image equal to nullptr. |
| |
| Image may be created from Bitmap, Pixmap, Surface, Picture, encoded streams, |
| GPU_Texture, YUV_ColorSpace data, or hardware buffer. Encoded streams supported |
| include BMP, GIF, HEIF, ICO, JPEG, PNG, WBMP, WebP. Supported encodings details |
| vary with platform. |
| |
| #Topic Raster_Image |
| #Alias Raster_Image |
| Raster_Image pixels are unencoded in a Raster_Bitmap. These pixels may be read |
| directly and in most cases written to, although edited pixels may not be drawn |
| if Image has been copied internally. |
| ## |
| |
| #Topic Texture_Image |
| Texture_Image are located on GPU and pixels are not accessible. Texture_Image |
| are allocated optimally for best performance. Raster_Image may |
| be drawn to GPU_Surface, but pixels are uploaded from CPU to GPU downgrading |
| performance. |
| ## |
| |
| #Topic Lazy_Image |
| Lazy_Image defer allocating buffer for Image pixels and decoding stream until |
| Image is drawn. Lazy_Image caches result if possible to speed up repeated |
| drawing. |
| ## |
| |
| #Topic Overview |
| |
| #Subtopic Subtopics |
| #ToDo manually add subtopics ## |
| #Table |
| #Legend |
| # topics # description ## |
| #Legend ## |
| #Table ## |
| ## |
| |
| #Subtopic Member_Functions |
| #Table |
| #Legend |
| # description # function ## |
| #Legend ## |
| # MakeBackendTextureFromSkImage # Creates GPU_Texture from Image. ## |
| # MakeCrossContextFromEncoded # Creates Image from encoded data, and uploads to GPU. ## |
| # MakeFromAHardwareBuffer # Creates Image from Android hardware buffer. ## |
| # MakeFromAdoptedTexture # Creates Image from GPU_Texture, managed internally. ## |
| # MakeFromBitmap # Creates Image from Bitmap, sharing or copying pixels. ## |
| # MakeFromDeferredTextureImageData # ## |
| # MakeFromEncoded # Creates Image from encoded data. ## |
| # MakeFromGenerator # Creates Image from a stream of data. ## |
| # MakeFromNV12TexturesCopy # Creates Image from YUV_ColorSpace data in two planes. ## |
| # MakeFromPicture # Creates Image from Picture. ## |
| # MakeFromRaster # Creates Image from Pixmap, with release. ## |
| # MakeFromTexture # Creates Image from GPU_Texture, managed externally. ## |
| # MakeFromYUVTexturesCopy # Creates Image from YUV_ColorSpace data in three planes. ## |
| # MakeRasterCopy # Creates Image from Pixmap and copied pixels. ## |
| # MakeRasterData # Creates Image from Image_Info and shared pixels. ## |
| # alphaType # Returns Alpha_Type. ## |
| # asLegacyBitmap # Returns as Raster_Bitmap. ## |
| # bounds() # Returns width() and height() as Rectangle. ## |
| # colorSpace # Returns Color_Space. ## |
| # dimensions() # Returns width() and height(). ## |
| # encodeToData # Returns encoded Image as SkData. ## |
| # getDeferredTextureImageData # ## |
| # getTexture # Deprecated. ## |
| # getTextureHandle # Returns GPU reference to Image as texture. ## |
| # height() # Returns pixel row count. ## |
| # isAlphaOnly # Returns if pixels represent a transparency mask. ## |
| # isLazyGenerated # Returns if Image is created as needed. ## |
| # isOpaque # Returns if Alpha_Type is kOpaque_SkAlphaType. ## |
| # isTextureBacked # Returns if Image was created from GPU_Texture. ## |
| # isValid # Returns if Image can draw to Raster_Surface or GPU_Context. ## |
| # makeColorSpace # Creates Image matching Color_Space if possible. ## |
| # makeNonTextureImage # Creates Image without dependency on GPU_Texture. ## |
| # makeRasterImage # Creates Image compatible with Raster_Surface if possible. ## |
| # makeShader # Creates Shader, Paint element that can tile Image. ## |
| # makeSubset # Creates Image containing part of original. ## |
| # makeTextureImage # Creates Image matching Color_Space if possible. ## |
| # makeWithFilter # Creates filtered, clipped Image. ## |
| # peekPixels # Returns Pixmap if possible. ## |
| # readPixels # Copies and converts pixels. ## |
| # refColorSpace # Returns Image_Info Color_Space. ## |
| # refEncodedData # Returns Image encoded in SkData if present. ## |
| # scalePixels # Scales and converts one Image to another. ## |
| # toString # Converts Image to machine readable form. ## |
| # uniqueID # Identifier for Image. ## |
| # width() # Returns pixel column count. ## |
| #Table ## |
| #Subtopic ## |
| |
| #Topic ## |
| |
| #Typedef SkImageInfo Info |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeRasterCopy(const SkPixmap& pixmap) |
| |
| Creates Image from Pixmap and copy of pixels. Since pixels are copied, Pixmap |
| pixels may be modified or deleted without affecting Image. |
| |
| Image is returned if Pixmap is valid. Valid Pixmap parameters include: |
| dimensions are greater than zero; |
| each dimension fits in 29 bits; |
| Color_Type and Alpha_Type are valid, and Color_Type is not kUnknown_SkColorType; |
| row bytes are large enough to hold one row of pixels; |
| pixel address is not nullptr. |
| |
| #Param pixmap Image_Info, pixel address, and row bytes ## |
| |
| #Return copy of Pixmap pixels, or nullptr ## |
| |
| #Example |
| #Height 50 |
| #Description |
| Draw a five by five bitmap, and draw a copy in an Image. Editing the pixmap |
| alters the bitmap draw, but does not alter the Image draw since the Image |
| contains a copy of the pixels. |
| ## |
| uint8_t storage[][5] = {{ 0xCA, 0xDA, 0xCA, 0xC9, 0xA3 }, |
| { 0xAC, 0xA8, 0x89, 0xA7, 0x87 }, |
| { 0x9B, 0xB5, 0xE5, 0x95, 0x46 }, |
| { 0x90, 0x81, 0xC5, 0x71, 0x33 }, |
| { 0x75, 0x55, 0x44, 0x40, 0x30 }}; |
| SkImageInfo imageInfo = SkImageInfo::Make(5, 5, kGray_8_SkColorType, kOpaque_SkAlphaType); |
| SkPixmap pixmap(imageInfo, storage[0], sizeof(storage) / 5); |
| SkBitmap bitmap; |
| bitmap.installPixels(pixmap); |
| sk_sp<SkImage> image = SkImage::MakeRasterCopy(pixmap); |
| *pixmap.writable_addr8(2, 2) = 0x00; |
| canvas->scale(10, 10); |
| canvas->drawBitmap(bitmap, 0, 0); |
| canvas->drawImage(image, 10, 0); |
| ## |
| |
| #SeeAlso MakeRasterData MakeFromGenerator |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeRasterData(const Info& info, sk_sp<SkData> pixels, size_t rowBytes) |
| |
| Creates Image from Image_Info, sharing pixels. |
| |
| Image is returned if Image_Info is valid. Valid Image_Info parameters include: |
| dimensions are greater than zero; |
| each dimension fits in 29 bits; |
| Color_Type and Alpha_Type are valid, and Color_Type is not kUnknown_SkColorType; |
| rowBytes are large enough to hold one row of pixels; |
| pixels is not nullptr, and contains enough data for Image. |
| |
| #Param info contains width, height, Alpha_Type, Color_Type, Color_Space ## |
| #Param pixels address or pixel storage ## |
| #Param rowBytes size of pixel row or larger ## |
| |
| #Return Image sharing pixels, or nullptr ## |
| |
| #Example |
| #Image 3 |
| size_t rowBytes = image->width() * SkColorTypeBytesPerPixel(kRGBA_8888_SkColorType); |
| sk_sp<SkData> data = SkData::MakeUninitialized(rowBytes * image->height()); |
| SkImageInfo dstInfo = SkImageInfo::MakeN32(image->width(), image->height(), |
| kPremul_SkAlphaType); |
| image->readPixels(dstInfo, data->writable_data(), rowBytes, 0, 0, SkImage::kAllow_CachingHint); |
| sk_sp<SkImage> raw = SkImage::MakeRasterData(dstInfo.makeColorType(kRGBA_8888_SkColorType), |
| data, rowBytes); |
| canvas->drawImage(image, 0, 0); |
| canvas->drawImage(raw.get(), 128, 0); |
| ## |
| |
| #SeeAlso MakeRasterCopy MakeFromGenerator |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Typedef void* ReleaseContext |
| |
| Caller data passed to RasterReleaseProc; may be nullptr. |
| |
| #SeeAlso MakeFromRaster RasterReleaseProc |
| |
| ## |
| |
| #Typedef void (*RasterReleaseProc)(const void* pixels, ReleaseContext) |
| |
| Function called when Image no longer shares pixels. ReleaseContext is |
| provided by caller when Image is created, and may be nullptr. |
| |
| #SeeAlso ReleaseContext MakeFromRaster |
| |
| ## |
| |
| #Method static sk_sp<SkImage> MakeFromRaster(const SkPixmap& pixmap, |
| RasterReleaseProc rasterReleaseProc, |
| ReleaseContext releaseContext) |
| |
| Creates Image from pixmap, sharing Pixmap pixels. Pixels must remain valid and |
| unchanged until rasterReleaseProc is called. rasterReleaseProc is passed |
| releaseContext when Image is deleted or no longer refers to pixmap pixels. |
| |
| Pass nullptr for rasterReleaseProc to share Pixmap without requiring a callback |
| when Image is released. Pass nullptr for releaseContext if rasterReleaseProc |
| does not require state. |
| |
| Image is returned if pixmap is valid. Valid Pixmap parameters include: |
| dimensions are greater than zero; |
| each dimension fits in 29 bits; |
| Color_Type and Alpha_Type are valid, and Color_Type is not kUnknown_SkColorType; |
| row bytes are large enough to hold one row of pixels; |
| pixel address is not nullptr. |
| |
| #Param pixmap Image_Info, pixel address, and row bytes ## |
| #Param rasterReleaseProc function called when pixels can be released; or nullptr ## |
| #Param releaseContext state passed to rasterReleaseProc; or nullptr ## |
| |
| #Return Image sharing pixmap ## |
| |
| #Example |
| #Function |
| static void releaseProc(const void* pixels, SkImage::ReleaseContext context) { |
| int* countPtr = static_cast<int*>(context); |
| *countPtr += 1; |
| } |
| ## |
| |
| void draw(SkCanvas* canvas) { |
| SkColor color = 0; |
| SkPixmap pixmap(SkImageInfo::MakeN32(1, 1, kPremul_SkAlphaType), &color, 4); |
| int releaseCount = 0; |
| sk_sp<SkImage> image(SkImage::MakeFromRaster(pixmap, releaseProc, &releaseCount)); |
| SkDebugf("before reset: %d\n", releaseCount); |
| image.reset(); |
| SkDebugf("after reset: %d\n", releaseCount); |
| } |
| #StdOut |
| before reset: 0 |
| after reset: 1 |
| ## |
| ## |
| |
| #SeeAlso MakeRasterCopy MakeRasterData MakeFromGenerator RasterReleaseProc ReleaseContext |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromBitmap(const SkBitmap& bitmap) |
| |
| Creates Image from bitmap, sharing or copying bitmap pixels. If the bitmap |
| is marked immutable, and its pixel memory is shareable, it may be shared |
| instead of copied. |
| |
| Image is returned if bitmap is valid. Valid Bitmap parameters include: |
| dimensions are greater than zero; |
| each dimension fits in 29 bits; |
| Color_Type and Alpha_Type are valid, and Color_Type is not kUnknown_SkColorType; |
| row bytes are large enough to hold one row of pixels; |
| pixel address is not nullptr. |
| |
| #Param bitmap Image_Info, row bytes, and pixels ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| #Description |
| The first Bitmap is shared; writing to the pixel memory changes the first |
| Image. |
| The second Bitmap is marked immutable, and is copied; writing to the pixel |
| memory does not alter the second Image. |
| ## |
| #Height 50 |
| uint8_t storage[][5] = {{ 0xCA, 0xDA, 0xCA, 0xC9, 0xA3 }, |
| { 0xAC, 0xA8, 0x89, 0xA7, 0x87 }, |
| { 0x9B, 0xB5, 0xE5, 0x95, 0x46 }, |
| { 0x90, 0x81, 0xC5, 0x71, 0x33 }, |
| { 0x75, 0x55, 0x44, 0x40, 0x30 }}; |
| SkImageInfo imageInfo = SkImageInfo::Make(5, 5, kGray_8_SkColorType, kOpaque_SkAlphaType); |
| SkPixmap pixmap(imageInfo, storage[0], sizeof(storage) / 5); |
| SkBitmap bitmap; |
| bitmap.installPixels(pixmap); |
| sk_sp<SkImage> image1 = SkImage::MakeFromBitmap(bitmap); |
| bitmap.setImmutable(); |
| sk_sp<SkImage> image2 = SkImage::MakeFromBitmap(bitmap); |
| *pixmap.writable_addr8(2, 2) = 0x00; |
| canvas->scale(10, 10); |
| canvas->drawImage(image1, 0, 0); |
| canvas->drawImage(image2, 10, 0); |
| ## |
| |
| #SeeAlso MakeFromRaster MakeRasterCopy MakeFromGenerator MakeRasterData |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromGenerator(std::unique_ptr<SkImageGenerator> imageGenerator, |
| const SkIRect* subset = nullptr) |
| |
| Creates Image from data returned by imageGenerator. Generated data is owned by Image and may not |
| be shared or accessed. |
| |
| subset allows selecting a portion of the full image. Pass nullptr to select the entire image; |
| otherwise, subset must be contained by image bounds. |
| |
| Image is returned if generator data is valid. Valid data parameters vary by type of data |
| and platform. |
| |
| imageGenerator may wrap Picture data, codec data, or custom data. |
| |
| #Param imageGenerator stock or custom routines to retrieve Image ## |
| #Param subset bounds of returned Image; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| #Description |
| The generator returning Picture cannot be shared; std::move transfers ownership to generated Image. |
| ## |
| SkPictureRecorder recorder; |
| recorder.beginRecording(100, 100)->drawColor(SK_ColorRED); |
| auto picture = recorder.finishRecordingAsPicture(); |
| auto gen = SkImageGenerator::MakeFromPicture({100, 100}, picture, nullptr, nullptr, |
| SkImage::BitDepth::kU8, SkColorSpace::MakeSRGB()); |
| sk_sp<SkImage> image = SkImage::MakeFromGenerator(std::move(gen)); |
| canvas->drawImage(image, 0, 0); |
| ## |
| |
| #SeeAlso MakeFromEncoded |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromEncoded(sk_sp<SkData> encoded, const SkIRect* subset = nullptr) |
| |
| Creates Image from encoded data. |
| subset allows selecting a portion of the full image. Pass nullptr to select the entire image; |
| otherwise, subset must be contained by image bounds. |
| |
| Image is returned if format of the encoded data is recognized and supported. |
| Recognized formats vary by platfrom. |
| |
| #Param encoded data of Image to decode ## |
| #Param subset bounds of returned Image; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| #Image 3 |
| int x = 0; |
| for (int quality : { 100, 50, 10, 1} ) { |
| sk_sp<SkData> encodedData = image->encodeToData(SkEncodedImageFormat::kJPEG, quality); |
| sk_sp<SkImage> image = SkImage::MakeFromEncoded(encodedData); |
| canvas->drawImage(image, x, 0); |
| x += 64; |
| } |
| ## |
| |
| #SeeAlso MakeFromGenerator |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Typedef void (*TextureReleaseProc)(ReleaseContext releaseContext) |
| |
| ## |
| |
| #Method static sk_sp<SkImage> MakeFromTexture(GrContext* context, |
| const GrBackendTexture& backendTexture, |
| GrSurfaceOrigin origin, |
| SkAlphaType alphaType, |
| sk_sp<SkColorSpace> colorSpace) |
| |
| Deprecated. |
| |
| #Param context GPU_Context ## |
| #Param backendTexture texture residing on GPU ## |
| #Param origin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromAdoptedTexture SkSurface::MakeFromBackendTexture |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromTexture(GrContext* context, |
| const GrBackendTexture& backendTexture, |
| GrSurfaceOrigin origin, |
| SkAlphaType alphaType, |
| sk_sp<SkColorSpace> colorSpace, |
| TextureReleaseProc textureReleaseProc, |
| ReleaseContext releaseContext) |
| |
| Deprecated. |
| |
| #Param context GPU_Context ## |
| #Param backendTexture texture residing on GPU ## |
| #Param origin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| #Param textureReleaseProc function called when texture can be released ## |
| #Param releaseContext state passed to textureReleaseProc ## |
| |
| #Return created Image, or nullptr ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromAdoptedTexture SkSurface::MakeFromBackendTexture |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromTexture(GrContext* context, |
| const GrBackendTexture& backendTexture, |
| GrSurfaceOrigin origin, |
| SkColorType colorType, |
| SkAlphaType alphaType, |
| sk_sp<SkColorSpace> colorSpace) |
| |
| Creates Image from GPU_Texture associated with context. Caller is responsible for |
| managing the lifetime of GPU_Texture. |
| |
| Image is returned if format of backendTexture is recognized and supported. |
| Recognized formats vary by GPU back-end. |
| |
| #Param context GPU_Context ## |
| #Param backendTexture texture residing on GPU ## |
| #Param origin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorType one of: kUnknown_SkColorType, kAlpha_8_SkColorType, |
| kRGB_565_SkColorType, kARGB_4444_SkColorType, |
| kRGBA_8888_SkColorType, kBGRA_8888_SkColorType, |
| kGray_8_SkColorType, kRGBA_F16_SkColorType |
| ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| #Image 3 |
| #Platform gpu |
| #Height 128 |
| #Description |
| A back-end texture has been created and uploaded to the GPU outside of this example. |
| ## |
| GrContext* context = canvas->getGrContext(); |
| if (!context) { |
| return; |
| } |
| canvas->scale(.25f, .25f); |
| int x = 0; |
| for (auto origin : { kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin } ) { |
| sk_sp<SkImage> image = SkImage::MakeFromTexture(canvas->getGrContext(), backEndTexture, |
| origin, kOpaque_SkAlphaType, nullptr); |
| canvas->drawImage(image, x, 0); |
| x += 512; |
| } |
| ## |
| |
| #SeeAlso MakeFromAdoptedTexture SkSurface::MakeFromBackendTexture |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromTexture(GrContext* context, |
| const GrBackendTexture& backendTexture, |
| GrSurfaceOrigin origin, |
| SkColorType colorType, |
| SkAlphaType alphaType, |
| sk_sp<SkColorSpace> colorSpace, |
| TextureReleaseProc textureReleaseProc, |
| ReleaseContext releaseContext) |
| |
| Creates Image from GPU_Texture associated with context. GPU_Texture must stay |
| valid and unchanged until textureReleaseProc is called. textureReleaseProc is |
| passed releaseContext when Image is deleted or no longer refers to texture. |
| |
| Image is returned if format of backendTexture is recognized and supported. |
| Recognized formats vary by GPU back-end. |
| |
| #Param context GPU_Context ## |
| #Param backendTexture texture residing on GPU ## |
| #Param origin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorType one of: kUnknown_SkColorType, kAlpha_8_SkColorType, |
| kRGB_565_SkColorType, kARGB_4444_SkColorType, |
| kRGBA_8888_SkColorType, kBGRA_8888_SkColorType, |
| kGray_8_SkColorType, kRGBA_F16_SkColorType |
| ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| #Param textureReleaseProc function called when texture can be released ## |
| #Param releaseContext state passed to textureReleaseProc ## |
| |
| #Return created Image, or nullptr ## |
| |
| #ToDo |
| This doesn't do anything clever with TextureReleaseProc because it may not get called |
| fwithin the lifetime of the example |
| ## |
| |
| #Example |
| GrContext* context = canvas->getGrContext(); |
| if (!context) { |
| return; |
| } |
| auto debugster = [](SkImage::ReleaseContext context) -> void { |
| *((int *) context) += 128; |
| }; |
| int x = 0; |
| for (auto origin : { kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin } ) { |
| sk_sp<SkImage> image = SkImage::MakeFromTexture(canvas->getGrContext(), backEndTexture, |
| origin, kRGBA_8888_SkColorType, kOpaque_SkAlphaType, nullptr, debugster, &x); |
| canvas->drawImage(image, x, 0); |
| x += 128; |
| } |
| ## |
| |
| #SeeAlso MakeFromAdoptedTexture SkSurface::MakeFromBackendTexture |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeCrossContextFromEncoded(GrContext* context, sk_sp<SkData> data, |
| bool buildMips, |
| SkColorSpace* dstColorSpace) |
| |
| Creates Image from encoded data. Image is uploaded to GPU back-end using context. |
| |
| Created Image is available to other GPU contexts, and is available across thread |
| boundaries. All contexts must be in the same GPU_Share_Group, or otherwise |
| share resources. |
| |
| When Image is no longer referenced, context releases texture memory |
| asynchronously. |
| |
| Texture decoded from data is uploaded to match Surface created with |
| dstColorSpace. Color_Space of Image is determined by encoded data. |
| |
| Image is returned if format of data is recognized and supported, and if context |
| supports moving resources. Recognized formats vary by platform and GPU back-end. |
| |
| Image is returned using MakeFromEncoded if context is nullptr or does not support |
| moving resources between contexts. |
| |
| #Param context GPU_Context ## |
| #Param data Image to decode ## |
| #Param buildMips create Image as Mip_Map if true ## |
| #Param dstColorSpace range of colors of matching Surface on GPU ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| #Image 4 |
| #Height 128 |
| GrContext* context = canvas->getGrContext(); |
| sk_sp<SkData> encodedData = image->encodeToData(SkEncodedImageFormat::kJPEG, 100); |
| sk_sp<SkImage> image = SkImage::MakeCrossContextFromEncoded(context, |
| encodedData, false, nullptr); |
| canvas->drawImage(image, 0, 0); |
| ## |
| |
| #SeeAlso MakeCrossContextFromPixmap |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeCrossContextFromPixmap(GrContext* context, const SkPixmap& pixmap, |
| bool buildMips, |
| SkColorSpace* dstColorSpace) |
| |
| Creates Image from pixmap. Image is uploaded to GPU back-end using context. |
| |
| Created Image is available to other GPU contexts, and is available across thread |
| boundaries. All contexts must be in the same GPU_Share_Group, or otherwise |
| share resources. |
| |
| When Image is no longer referenced, context releases texture memory |
| asynchronously. |
| |
| Texture created from pixmap is uploaded to match Surface created with |
| dstColorSpace. Color_Space of Image is determined by pixmap.colorSpace(). |
| |
| Image is returned referring to GPU back-end if context is not nullptr, |
| format of data is recognized and supported, and if context supports moving |
| resources between contexts. Otherwise, pixmap pixel data is copied and Image |
| as returned in raster format if possible; nullptr may be returned. |
| Recognized GPU formats vary by platform and GPU back-end. |
| |
| #Param context GPU_Context ## |
| #Param pixmap Image_Info, pixel address, and row bytes ## |
| #Param buildMips create Image as Mip_Map if true ## |
| #Param dstColorSpace range of colors of matching Surface on GPU ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| #Image 4 |
| #Height 128 |
| GrContext* context = canvas->getGrContext(); |
| SkPixmap pixmap; |
| if (source.peekPixels(&pixmap)) { |
| sk_sp<SkImage> image = SkImage::MakeCrossContextFromPixmap(context, pixmap, |
| false, nullptr); |
| canvas->drawImage(image, 0, 0); |
| } |
| ## |
| |
| #SeeAlso MakeCrossContextFromEncoded |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromAdoptedTexture(GrContext* context, |
| const GrBackendTexture& backendTexture, |
| GrSurfaceOrigin surfaceOrigin, |
| SkAlphaType alphaType = kPremul_SkAlphaType, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| Deprecated. |
| |
| #Param context GPU_Context ## |
| #Param backendTexture texture residing on GPU ## |
| #Param surfaceOrigin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromTexture MakeFromYUVTexturesCopy |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromAdoptedTexture(GrContext* context, |
| const GrBackendTexture& backendTexture, |
| GrSurfaceOrigin surfaceOrigin, |
| SkColorType colorType, |
| SkAlphaType alphaType = kPremul_SkAlphaType, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| Creates Image from backendTexture associated with context. backendTexture and |
| returned Image are managed internally, and are released when no longer needed. |
| |
| Image is returned if format of backendTexture is recognized and supported. |
| Recognized formats vary by GPU back-end. |
| |
| #Param context GPU_Context ## |
| #Param backendTexture texture residing on GPU ## |
| #Param surfaceOrigin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorType one of: kUnknown_SkColorType, kAlpha_8_SkColorType, |
| kRGB_565_SkColorType, kARGB_4444_SkColorType, |
| kRGBA_8888_SkColorType, kBGRA_8888_SkColorType, |
| kGray_8_SkColorType, kRGBA_F16_SkColorType |
| ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| if (!canvas->getGrContext()) { |
| return; |
| } |
| canvas->scale(.5f, .5f); |
| canvas->clear(0x7f3f5f7f); |
| int x = 0, y = 0; |
| for (auto origin : { kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin } ) { |
| for (auto alpha : { kOpaque_SkAlphaType, kPremul_SkAlphaType, kUnpremul_SkAlphaType } ) { |
| sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(canvas->getGrContext(), |
| backEndTexture, origin, |
| kRGBA_8888_SkColorType, alpha); |
| canvas->drawImage(image, x, y); |
| x += 160; |
| } |
| x -= 160 * 3; |
| y += 256; |
| } |
| ## |
| |
| #SeeAlso MakeFromTexture MakeFromYUVTexturesCopy |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromYUVTexturesCopy(GrContext* context, SkYUVColorSpace yuvColorSpace, |
| const GrBackendObject yuvTextureHandles[3], |
| const SkISize yuvSizes[3], |
| GrSurfaceOrigin surfaceOrigin, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| Creates Image from copy of yuvTextureHandles, an array of textures on GPU. |
| yuvTextureHandles contain pixels for YUV planes of Image. |
| yuvSizes conain dimensions for each pixel plane. Dimensions must be greater than |
| zero but may differ from plane to plane. Returned Image has the dimensions |
| yuvSizes[0]. yuvColorSpace describes how YUV colors convert to RGB colors. |
| |
| #Param context GPU_Context ## |
| #Param yuvColorSpace one of: kJPEG_SkYUVColorSpace, kRec601_SkYUVColorSpace, |
| kRec709_SkYUVColorSpace |
| ## |
| #Param yuvTextureHandles array of YUV textures on GPU ## |
| #Param yuvSizes dimensions of YUV textures ## |
| #Param surfaceOrigin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| # seems too complicated to create an example for this |
| #ToDo |
| should this be moved to chrome only? |
| ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromNV12TexturesCopy |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromYUVTexturesCopy(GrContext* context, SkYUVColorSpace yuvColorSpace, |
| const GrBackendTexture yuvTextureHandles[3], |
| const SkISize yuvSizes[3], |
| GrSurfaceOrigin surfaceOrigin, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| Creates Image from copy of yuvTextureHandles, an array of textures on GPU. |
| yuvTextureHandles contain pixels for YUV planes of Image. |
| yuvSizes conain dimensions for each pixel plane. Dimensions must be greater than |
| zero but may differ from plane to plane. Returned Image has the dimensions |
| yuvSizes[0]. yuvColorSpace describes how YUV colors convert to RGB colors. |
| |
| #Param context GPU_Context ## |
| #Param yuvColorSpace one of: kJPEG_SkYUVColorSpace, kRec601_SkYUVColorSpace, |
| kRec709_SkYUVColorSpace |
| ## |
| #Param yuvTextureHandles array of YUV textures on GPU ## |
| #Param yuvSizes dimensions of YUV textures ## |
| #Param surfaceOrigin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| # seems too complicated to create an example for this |
| #ToDo |
| should this be moved to chrome only? |
| ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromNV12TexturesCopy |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromNV12TexturesCopy(GrContext* context, |
| SkYUVColorSpace yuvColorSpace, |
| const GrBackendObject nv12TextureHandles[2], |
| const SkISize nv12Sizes[2], |
| GrSurfaceOrigin surfaceOrigin, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| Creates Image from copy of nv12TextureHandles, an array of textures on GPU. |
| nv12TextureHandles[0] contains pixels for YUV_Component_Y plane. |
| nv12TextureHandles[1] contains pixels for YUV_Component_U plane, |
| followed by pixels for YUV_Component_V plane. |
| nv12Sizes conain dimensions for each pixel plane. Dimensions must be greater than |
| zero but may differ from plane to plane. Returned Image has the dimensions |
| nv12Sizes[0]. yuvColorSpace describes how YUV colors convert to RGB colors. |
| |
| #Param context GPU_Context ## |
| #Param yuvColorSpace one of: kJPEG_SkYUVColorSpace, kRec601_SkYUVColorSpace, |
| kRec709_SkYUVColorSpace |
| ## |
| #Param nv12TextureHandles array of YUV textures on GPU ## |
| #Param nv12Sizes dimensions of YUV textures ## |
| #Param surfaceOrigin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| # seems too complicated to create an example for this |
| #ToDo |
| should this be moved to chrome only? |
| ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromYUVTexturesCopy |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromNV12TexturesCopy(GrContext* context, |
| SkYUVColorSpace yuvColorSpace, |
| const GrBackendTexture nv12TextureHandles[2], |
| const SkISize nv12Sizes[2], |
| GrSurfaceOrigin surfaceOrigin, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| Creates Image from copy of nv12TextureHandles, an array of textures on GPU. |
| nv12TextureHandles[0] contains pixels for YUV_Component_Y plane. |
| nv12TextureHandles[1] contains pixels for YUV_Component_U plane, |
| followed by pixels for YUV_Component_V plane. |
| nv12Sizes conain dimensions for each pixel plane. Dimensions must be greater than |
| zero but may differ from plane to plane. Returned Image has the dimensions |
| nv12Sizes[0]. yuvColorSpace describes how YUV colors convert to RGB colors. |
| |
| #Param context GPU_Context ## |
| #Param yuvColorSpace one of: kJPEG_SkYUVColorSpace, kRec601_SkYUVColorSpace, |
| kRec709_SkYUVColorSpace |
| ## |
| #Param nv12TextureHandles array of YUV textures on GPU ## |
| #Param nv12Sizes dimensions of YUV textures ## |
| #Param surfaceOrigin one of: kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| # seems too complicated to create an example for this |
| #ToDo |
| should this be moved to chrome only? |
| ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromYUVTexturesCopy |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Bug 7424 |
| currently uncalled by any test or client |
| ## |
| |
| #Enum BitDepth |
| |
| #Code |
| enum class BitDepth { |
| kU8, |
| kF16, |
| }; |
| ## |
| |
| #Const kU8 0 |
| Use 8 bits per Color_ARGB component using unsigned integer format. |
| ## |
| #Const kF16 1 |
| Use 16 bits per Color_ARGB component using half-precision floating point format. |
| ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromPicture |
| |
| #Enum ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromPicture(sk_sp<SkPicture> picture, const SkISize& dimensions, |
| const SkMatrix* matrix, const SkPaint* paint, |
| BitDepth bitDepth, |
| sk_sp<SkColorSpace> colorSpace) |
| |
| Creates Image from picture. Returned Image width and height are set by dimensions. |
| Image draws picture with matrix and paint, set to bitDepth and colorSpace. |
| |
| If matrix is nullptr, draws with identity Matrix. If paint is nullptr, draws |
| with default Paint. colorSpace may be nullptr. |
| |
| #Param picture stream of drawing commands ## |
| #Param dimensions width and height ## |
| #Param matrix Matrix to rotate, scale, translate, and so on; may be nullptr ## |
| #Param paint Paint to apply transparency, filtering, and so on; may be nullptr ## |
| #Param bitDepth 8 bit integer or 16 bit float: per component ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #Example |
| SkPaint paint; |
| SkPictureRecorder recorder; |
| SkCanvas* recordingCanvas = recorder.beginRecording(50, 50); |
| for (auto color : { SK_ColorRED, SK_ColorBLUE, 0xff007f00 } ) { |
| paint.setColor(color); |
| recordingCanvas->drawRect({10, 10, 30, 40}, paint); |
| recordingCanvas->translate(10, 10); |
| recordingCanvas->scale(1.2f, 1.4f); |
| } |
| sk_sp<SkPicture> playback = recorder.finishRecordingAsPicture(); |
| int x = 0, y = 0; |
| for (auto alpha : { 70, 140, 210 } ) { |
| paint.setAlpha(alpha); |
| auto srgbColorSpace = SkColorSpace::MakeSRGB(); |
| sk_sp<SkImage> image = SkImage::MakeFromPicture(playback, {50, 50}, nullptr, &paint, |
| SkImage::BitDepth::kU8, srgbColorSpace); |
| canvas->drawImage(image, x, y); |
| x += 70; y += 70; |
| } |
| ## |
| |
| #SeeAlso SkCanvas::drawPicture |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static sk_sp<SkImage> MakeFromAHardwareBuffer(AHardwareBuffer* hardwareBuffer, |
| SkAlphaType alphaType = kPremul_SkAlphaType, |
| sk_sp<SkColorSpace> colorSpace = nullptr) |
| |
| #Bug 7447 ## |
| |
| Creates Image from Android hardware buffer. |
| Returned Image takes a reference on the buffer. |
| |
| Only available on Android, when __ANDROID_API__ is defined to be 26 or greater. |
| |
| #Param hardwareBuffer AHardwareBuffer Android hardware buffer ## |
| #Param alphaType one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType |
| ## |
| #Param colorSpace range of colors; may be nullptr ## |
| |
| #Return created Image, or nullptr ## |
| |
| #NoExample |
| ## |
| |
| #SeeAlso MakeFromRaster |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int width() const |
| |
| Returns pixel count in each row. |
| |
| #Return pixel width in Image ## |
| |
| #Example |
| #Image 4 |
| #Height 168 |
| canvas->translate(10, 10); |
| canvas->drawImage(image, 0, 0); |
| canvas->translate(0, image->height()); |
| SkPaint paint; |
| paint.setTextAlign(SkPaint::kCenter_Align); |
| canvas->drawLine(0, 10, image->width(), 10, paint); |
| canvas->drawString("width", image->width() / 2, 25, paint); |
| ## |
| |
| #SeeAlso dimensions() height() |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int height() const |
| |
| Returns pixel row count. |
| |
| #Return pixel height in Image ## |
| |
| #Example |
| #Image 4 |
| #Height 148 |
| canvas->translate(10, 10); |
| canvas->drawImage(image, 0, 0); |
| canvas->translate(image->width(), 0); |
| SkPaint paint; |
| paint.setTextAlign(SkPaint::kCenter_Align); |
| paint.setVerticalText(true); |
| canvas->drawLine(10, 0, 10, image->height(), paint); |
| canvas->drawString("height", 25, image->height() / 2, paint);## |
| |
| #SeeAlso dimensions() width() |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkISize dimensions() const |
| |
| Returns ISize { width(), height() }. |
| |
| #Return integral size of width() and height() ## |
| |
| #Example |
| #Image 4 |
| SkISize dimensions = image->dimensions(); |
| SkIRect bounds = image->bounds(); |
| SkIRect dimensionsAsBounds = SkIRect::MakeSize(dimensions); |
| SkDebugf("dimensionsAsBounds %c= bounds\n", dimensionsAsBounds == bounds ? '=' : '!'); |
| ## |
| |
| #SeeAlso height() width() bounds() |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkIRect bounds() const |
| |
| Returns IRect { 0, 0, width(), height() }. |
| |
| #Return integral rectangle from origin to width() and height() ## |
| |
| #Example |
| #Height 128 |
| #Image 4 |
| canvas->scale(.5f, .5f); |
| SkIRect bounds = image->bounds(); |
| for (int x : { 0, image->width() } ) { |
| for (int y : { 0, image->height() } ) { |
| canvas->drawImage(image, x, y); |
| } |
| } |
| ## |
| |
| #SeeAlso dimensions() |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method uint32_t uniqueID() const |
| |
| Returns value unique to image. Image contents cannot change after Image is |
| created. Any operation to create a new Image will receive generate a new |
| unique number. |
| |
| #Return unique identifier ## |
| |
| #Example |
| #Image 5 |
| #Height 156 |
| sk_sp<SkImage> subset = image->makeSubset({10, 20, 90, 100}); |
| canvas->drawImage(image, 0, 0); |
| canvas->drawImage(subset, 128, 0); |
| SkPaint paint; |
| SkString s; |
| s.printf("original id: %d", image->uniqueID()); |
| canvas->drawString(s, 20, image->height() + 20, paint); |
| s.printf("subset id: %d", subset->uniqueID()); |
| canvas->drawString(s, 148, subset->height() + 20, paint); |
| ## |
| |
| #SeeAlso isLazyGenerated |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkAlphaType alphaType() const |
| |
| Returns Alpha_Type, one of: kUnknown_SkAlphaType, kOpaque_SkAlphaType, |
| kPremul_SkAlphaType, kUnpremul_SkAlphaType. |
| |
| Alpha_Type returned was a parameter to an Image constructor, |
| or was parsed from encoded data. |
| |
| #Return Alpha_Type in Image ## |
| |
| #Example |
| #Image 4 |
| #Height 156 |
| const char* alphaTypeStr[] = { "Unknown", "Opaque", "Premul", "Unpremul" }; |
| SkAlphaType alphaType = image->alphaType(); |
| canvas->drawImage(image, 0, 0); |
| SkPaint paint; |
| canvas->drawString(alphaTypeStr[(int) alphaType], 20, image->height() + 20, paint); |
| ## |
| |
| #SeeAlso SkImageInfo::alphaType |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkColorSpace* colorSpace() const |
| |
| Returns Color_Space, the range of colors, associated with Image. The |
| reference count of Color_Space is unchanged. The returned Color_Space is |
| immutable. |
| |
| Color_Space returned was passed to an Image constructor, |
| or was parsed from encoded data. Color_Space returned may be ignored when Image |
| is drawn, depending on the capabilities of the Surface receiving the drawing. |
| |
| #Return Color_Space in Image, or nullptr ## |
| |
| #Example |
| #Image 3 |
| #Set sRGB |
| SkPixmap pixmap; |
| source.peekPixels(&pixmap); |
| canvas->scale(.25f, .25f); |
| int y = 0; |
| for (auto gamma : { SkColorSpace::kLinear_RenderTargetGamma, |
| SkColorSpace::kSRGB_RenderTargetGamma } ) { |
| int x = 0; |
| sk_sp<SkColorSpace> colorSpace = SkColorSpace::MakeRGB(gamma, SkColorSpace::kSRGB_Gamut); |
| for (int index = 0; index < 2; ++index) { |
| pixmap.setColorSpace(colorSpace); |
| sk_sp<SkImage> image = SkImage::MakeRasterCopy(pixmap); |
| canvas->drawImage(image, x, y); |
| colorSpace = image->colorSpace()->makeColorSpin(); |
| x += 512; |
| } |
| y += 512; |
| } |
| ## |
| |
| #SeeAlso refColorSpace makeColorSpace |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkColorSpace> refColorSpace() const |
| |
| Returns a smart pointer to Color_Space, the range of colors, associated with |
| Image. The smart pointer tracks the number of objects sharing this |
| SkColorSpace reference so the memory is released when the owners destruct. |
| |
| The returned SkColorSpace is immutable. |
| |
| Color_Space returned was passed to an Image constructor, |
| or was parsed from encoded data. Color_Space returned may be ignored when Image |
| is drawn, depending on the capabilities of the Surface receiving the drawing. |
| |
| #Return Color_Space in Image, or nullptr, wrapped in a smart pointer ## |
| |
| #Example |
| #Image 3 |
| #Set sRGB |
| SkPixmap pixmap; |
| source.peekPixels(&pixmap); |
| canvas->scale(.25f, .25f); |
| int y = 0; |
| for (auto gamma : { SkColorSpace::kLinear_RenderTargetGamma, |
| SkColorSpace::kSRGB_RenderTargetGamma } ) { |
| int x = 0; |
| sk_sp<SkColorSpace> colorSpace = SkColorSpace::MakeRGB(gamma, SkColorSpace::kSRGB_Gamut); |
| for (int index = 0; index < 2; ++index) { |
| pixmap.setColorSpace(colorSpace); |
| sk_sp<SkImage> image = SkImage::MakeRasterCopy(pixmap); |
| canvas->drawImage(image, x, y); |
| colorSpace = image->refColorSpace()->makeColorSpin(); |
| x += 512; |
| } |
| y += 512; |
| } |
| ## |
| |
| #SeeAlso colorSpace makeColorSpace |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isAlphaOnly() const |
| |
| Returns true if Image pixels represent transparency only. If true, each pixel |
| is packed in 8 bits as defined by kAlpha_8_SkColorType. |
| |
| #Return true if pixels represent a transparency mask ## |
| |
| #Example |
| uint8_t pmColors = 0; |
| sk_sp<SkImage> image = SkImage::MakeRasterCopy({SkImageInfo::MakeA8(1, 1), &pmColors, 1}); |
| SkDebugf("alphaOnly = %s\n", image->isAlphaOnly() ? "true" : "false"); |
| #StdOut |
| alphaOnly = true |
| ## |
| ## |
| |
| #SeeAlso alphaType isOpaque |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isOpaque() const |
| |
| Returns true if pixels ignore their Alpha value and are treated as fully opaque. |
| |
| #Return true if Alpha_Type is kOpaque_SkAlphaType ## |
| |
| #Example |
| auto check_isopaque = [](const SkImageInfo& imageInfo) -> void { |
| auto surface(SkSurface::MakeRaster(imageInfo)); |
| auto image(surface->makeImageSnapshot()); |
| SkDebugf("isOpaque = %s\n", image->isOpaque() ? "true" : "false"); |
| }; |
| |
| check_isopaque(SkImageInfo::MakeN32Premul(5, 5)); |
| check_isopaque(SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType)); |
| #StdOut |
| isOpaque = false |
| isOpaque = true |
| ## |
| ## |
| |
| #SeeAlso alphaType isAlphaOnly |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkShader> makeShader(SkShader::TileMode tileMode1, SkShader::TileMode tileMode2, |
| const SkMatrix* localMatrix = nullptr) const |
| |
| Creates Shader from Image. Shader dimensions are taken from Image. Shader uses |
| SkShader::TileMode rules to fill drawn area outside Image. localMatrix permits |
| transforming Image before Canvas_Matrix is applied. |
| |
| #Param tileMode1 tiling in x, one of: SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, |
| SkShader::kMirror_TileMode |
| ## |
| #Param tileMode2 tiling in y, one of: SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, |
| SkShader::kMirror_TileMode |
| ## |
| #Param localMatrix Image transformation, or nullptr ## |
| |
| #Return Shader containing Image ## |
| |
| #Example |
| #Image 4 |
| SkMatrix matrix; |
| matrix.setRotate(45); |
| SkPaint paint; |
| paint.setShader(image->makeShader(SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode, |
| &matrix)); |
| canvas->drawPaint(paint); |
| ## |
| |
| #SeeAlso scalePixels |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkShader> makeShader(const SkMatrix* localMatrix = nullptr) const |
| |
| Creates Shader from Image. Shader dimensions are taken from Image. Shader uses |
| SkShader::kClamp_TileMode to fill drawn area outside Image. localMatrix permits |
| transforming Image before Canvas_Matrix is applied. |
| |
| #Param localMatrix Image transformation, or nullptr ## |
| |
| #Return Shader containing Image ## |
| |
| #Example |
| #Image 5 |
| SkMatrix matrix; |
| matrix.setRotate(45); |
| matrix.postTranslate(125, 30); |
| SkPaint paint; |
| paint.setShader(image->makeShader(&matrix)); |
| canvas->drawPaint(paint); |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool peekPixels(SkPixmap* pixmap) const |
| |
| If the image has direct access to its pixels (i.e. they are in local RAM) |
| return true, and if not null, return in the pixmap parameter the info about the |
| images pixels. |
| On failure, return false and ignore the pixmap parameter. |
| |
| #Param pixmap incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method GrTexture* getTexture() const |
| |
| Deprecated. |
| |
| #Deprecated |
| ## |
| |
| #Private |
| currently used by Canvas2DLayerBridge in Chromium. |
| ## |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isTextureBacked() const |
| |
| Returns true if the image is texture backed. |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isValid(GrContext* context) const |
| |
| Returns true if Image can be drawn. If context |
| is nullptr, tests if Image draws on Raster_Surface; Otherwise, tests if Image |
| draws on GPU_Surface associated with context. |
| |
| Texture-backed images may become invalid if their underlying GrContext is abandoned. Some |
| generator-backed images may be invalid for CPU and/or GPU. |
| |
| #Param context GPU_Context ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method GrBackendObject getTextureHandle(bool flushPendingGrContextIO, |
| GrSurfaceOrigin* origin = nullptr) const |
| |
| Retrieves the back-end API handle of texture. If flushPendingGrContextIO is true, |
| complete deferred I/O operations. |
| |
| If origin in not nullptr, copies location of content drawn into Image. |
| |
| #Param flushPendingGrContextIO flag to flush outstanding requests ## |
| #Param origin storage for one of: kTopLeft_GrSurfaceOrigin, |
| kBottomLeft_GrSurfaceOrigin; or nullptr |
| ## |
| |
| #Return back-end API texture handle ## |
| |
| #Example |
| #Image 3 |
| #Platform gpu |
| GrContext* context = canvas->getGrContext(); |
| if (!context) { |
| return; |
| } |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| SkString str; |
| int y = 0; |
| for (auto origin : { kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin } ) { |
| sk_sp<SkImage> srcImage(SkImage::MakeFromTexture(context, |
| backEndTexture, origin, kPremul_SkAlphaType, nullptr)); |
| GrSurfaceOrigin readBackOrigin; |
| GrBackendObject readBackHandle = srcImage->getTextureHandle(false, &readBackOrigin); |
| str.printf("readBackHandle: %x", readBackHandle); |
| canvas->drawString(str, 5, y += 20, paint); |
| str.printf("origin: k%s_GrSurfaceOrigin", readBackOrigin ? "BottomLeft" : "TopLeft"); |
| canvas->drawString(str, 5, y += 20, paint); |
| } |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Enum CachingHint |
| |
| #Code |
| enum CachingHint { |
| kAllow_CachingHint, |
| kDisallow_CachingHint, |
| }; |
| ## |
| |
| Hints to image calls where the system might cache computed intermediates (e.g. the results |
| of decoding or a read-back from the GPU. Passing kAllow_CachingHint signals that the system's default |
| behavior is fine. Passing kDisallow_CachingHint signals that caching should be avoided. |
| |
| #Const kAllow_CachingHint 0 |
| ## |
| #Const kDisallow_CachingHint 1 |
| ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Enum ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, |
| int srcX, int srcY, CachingHint cachingHint = kAllow_CachingHint) const |
| |
| Copy the pixels from the image into the specified buffer (dstPixels + dstRowBytes), |
| converting them into the requested format (dstInfo). The image pixels are read |
| starting at the specified (srcX, srcY) location. |
| dstInfo and (srcX, srcY) offset specifies a source rectangle: |
| #Code |
| SkRect srcR; |
| srcR.setXYWH(srcX, srcY, dstInfo.width(), dstInfo.height()); |
| ## |
| |
| The source rectangle is intersected with the bounds of the image. If this intersection is not empty, |
| then we have two sets of pixels (of equal size). Replace dstPixels with the |
| corresponding Image pixels, performing any Color_Type/Alpha_Type transformations needed |
| (in the case where Image and dstInfo have different Color_Types or Alpha_Types). |
| This call can fail, returning false, for several reasons: |
| if source rectangle does not intersect the image bounds; |
| if the requested Color_Type/Alpha_Type cannot be converted from the image's types. |
| |
| #Param dstInfo incomplete ## |
| #Param dstPixels incomplete ## |
| #Param dstRowBytes incomplete ## |
| #Param srcX incomplete ## |
| #Param srcY incomplete ## |
| #Param cachingHint incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool readPixels(const SkPixmap& dst, int srcX, int srcY, |
| CachingHint cachingHint = kAllow_CachingHint) const |
| |
| #Param dst incomplete ## |
| #Param srcX incomplete ## |
| #Param srcY incomplete ## |
| #Param cachingHint incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool scalePixels(const SkPixmap& dst, SkFilterQuality filterQuality, |
| CachingHint cachingHint = kAllow_CachingHint) const |
| |
| Copies Image pixels into dst, converting to dst Color_Type and Alpha_Type. |
| If the conversion cannot be performed, false is returned. |
| If dst dimensions differ from Image dimensions, Image is scaled, applying |
| filterQuality. |
| |
| #Param dst incomplete ## |
| #Param filterQuality incomplete ## |
| #Param cachingHint incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkData> encodeToData(SkEncodedImageFormat encodedImageFormat, int quality) const |
| |
| Encodes Image pixels, returning result as SkData. |
| |
| Returns nullptr if encoding fails, or encodedImageFormat is not supported. |
| |
| #Param encodedImageFormat incomplete ## |
| #Param quality incomplete ## |
| |
| #Return encoded Image, or nullptr ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkData> encodeToData() const |
| |
| Encodes Image and returns result as SkData. Will reuse existing encoded data |
| if present, as returned by refEncodedData. If encoded data is missing or invalid, |
| Image is encoded as PNG. |
| |
| Returns nullptr if existing encoded data is missing or invalid and |
| encoding fails. |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkData> refEncodedData() const |
| |
| If the image already has its contents in encoded form (e.g. PNG or JPEG), return that |
| as SkData. If the image does not already has its contents in encoded form, return nullptr. |
| |
| To force the image to return its contents as encoded data, call encodeToData. |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method const char* toString(SkString* string) const |
| |
| #Param string incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkImage> makeSubset(const SkIRect& subset) const |
| |
| Return a new image that is a subset of this image. The underlying implementation may |
| share the pixels, or it may make a copy. |
| If subset does not intersect the bounds of this image, or the copy/share cannot be made, |
| nullptr will be returned. |
| |
| #Param subset incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkImage> makeTextureImage(GrContext* context, SkColorSpace* dstColorSpace) const |
| |
| Ensures that an image is backed by a texture (when GrContext is non-null), suitable for use |
| with surfaces that have the supplied destination color space. If no transformation is |
| required, the returned image may be the same as this image. If this image is from a |
| different GrContext, this will fail. |
| |
| #Param context GPU_Context ## |
| #Param dstColorSpace incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkImage> makeNonTextureImage() const |
| |
| Creates raster Image if Image contains GPU_Texture and raster Image , this will make a raster copy of it (or nullptr if reading back |
| the pixels fails). Otherwise, it returns the original image. |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkImage> makeRasterImage() 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. |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkImage> makeWithFilter(const SkImageFilter* filter, const SkIRect& subset, |
| const SkIRect& clipBounds, SkIRect* outSubset, |
| SkIPoint* offset) 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, stored in outSubset. |
| offset is storage, set to the amount to translate the result when drawn. |
| 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. |
| |
| #Param filter incomplete ## |
| #Param subset incomplete ## |
| #Param clipBounds incomplete ## |
| #Param outSubset incomplete ## |
| #Param offset incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Struct DeferredTextureImageUsageParams |
| |
| #Code |
| struct DeferredTextureImageUsageParams { |
| DeferredTextureImageUsageParams(const SkMatrix matrix, const SkFilterQuality quality, |
| int preScaleMipLevel); |
| SkMatrix fMatrix; |
| SkFilterQuality fQuality; |
| int fPreScaleMipLevel; |
| }; |
| ## |
| |
| #Member SkMatrix fMatrix |
| ## |
| |
| #Member SkFilterQuality fQuality |
| ## |
| |
| #Member int fPreScaleMipLevel |
| ## |
| |
| #Method DeferredTextureImageUsageParams(const SkMatrix matrix, const SkFilterQuality quality, |
| int preScaleMipLevel) |
| |
| #Param matrix incomplete ## |
| #Param quality incomplete ## |
| #Param preScaleMipLevel incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| ## |
| |
| #Method size_t getDeferredTextureImageData(const GrContextThreadSafeProxy& contextThreadSafeProxy, |
| const DeferredTextureImageUsageParams deferredTextureImageUsageParams[], |
| int paramCnt, |
| void* buffer, |
| SkColorSpace* dstColorSpace = nullptr, |
| SkColorType dstColorType = kN32_SkColorType) const |
| |
| 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 kARGB_4444_SkColorType), |
| then dstColorSpace must be null. |
| |
| #Param contextThreadSafeProxy incomplete ## |
| #Param deferredTextureImageUsageParams incomplete ## |
| #Param paramCnt incomplete ## |
| #Param buffer incomplete ## |
| #Param dstColorSpace incomplete ## |
| #Param dstColorType incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| ## |
| |
| #Method static sk_sp<SkImage> MakeFromDeferredTextureImageData(GrContext* context, const void* data, |
| SkBudgeted budgeted) |
| |
| Returns a texture-backed image from data produced in SkImage::getDeferredTextureImageData. |
| The context must be the context that provided the proxy passed to |
| getDeferredTextureImageData. |
| |
| #Param context GPU_Context ## |
| #Param data incomplete ## |
| #Param budgeted incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Typedef std::function<void(GrBackendTexture)> BackendTextureReleaseProc |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static bool MakeBackendTextureFromSkImage(GrContext* context, |
| sk_sp<SkImage> image, |
| GrBackendTexture* backendTexture, |
| BackendTextureReleaseProc* 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. |
| |
| If image is both texture backed and singly referenced; that is, its only |
| reference was transferred using std::move(): image is returned in backendTexture |
| without conversion or making a copy. |
| |
| If the SkImage is not texture backed, this function will generate a texture with the image's |
| contents and return that. |
| |
| #Param context GPU_Context ## |
| #Param image incomplete ## |
| #Param backendTexture incomplete ## |
| #Param backendTextureReleaseProc incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Enum LegacyBitmapMode |
| |
| #Code |
| enum LegacyBitmapMode { |
| kRO_LegacyBitmapMode, |
| kRW_LegacyBitmapMode, |
| }; |
| ## |
| |
| Helper functions to convert to SkBitmap |
| |
| #Const kRO_LegacyBitmapMode 0 |
| ## |
| #Const kRW_LegacyBitmapMode 1 |
| ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Enum ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode legacyBitmapMode) const |
| |
| Creates raster Bitmap with same pixels as Image. If legacyBitmapMode is kRO_LegacyBitmapMode, |
| returned bitmap is read-only and immutable. |
| Returns true if Bitmap is stored in bitmap. Returns false and resets bitmap if Bitmap |
| write did not succeed. |
| |
| #Param bitmap storage for legacy Bitmap ## |
| #Param legacyBitmapMode one of: kRO_LegacyBitmapMode, kRW_LegacyBitmapMode ## |
| |
| #Return true if Bitmap was created ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isLazyGenerated() const |
| |
| Returns true if Image is backed by an image-generator or other service that creates |
| and caches its pixels or texture on-demand. |
| |
| #Return true if Image is created as needed ## |
| |
| #Example |
| #Height 80 |
| #Function |
| class TestImageGenerator : public SkImageGenerator { |
| public: |
| TestImageGenerator() : SkImageGenerator(SkImageInfo::MakeN32Premul(10, 10)) {} |
| ~TestImageGenerator() override {} |
| protected: |
| bool onGetPixels(const SkImageInfo& info, void* pixelPtr, size_t rowBytes, |
| const Options& options) override { |
| SkPMColor* pixels = static_cast<SkPMColor*>(pixelPtr); |
| for (int y = 0; y < info.height(); ++y) { |
| for (int x = 0; x < info.width(); ++x) { |
| pixels[y * info.width() + x] = 0xff223344 + y * 0x000C0811; |
| } |
| } |
| return true; |
| } |
| }; |
| ## |
| void draw(SkCanvas* canvas) { |
| auto gen = std::unique_ptr<TestImageGenerator>(new TestImageGenerator()); |
| sk_sp<SkImage> image(SkImage::MakeFromGenerator(std::move(gen))); |
| SkString lazy(image->isLazyGenerated() ? "is lazy" : "not lazy"); |
| canvas->scale(8, 8); |
| canvas->drawImage(image, 0, 0, nullptr); |
| SkPaint paint; |
| paint.setTextSize(4); |
| canvas->drawString(lazy, 2, 5, paint); |
| } |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method sk_sp<SkImage> makeColorSpace(sk_sp<SkColorSpace> target, |
| SkTransferFunctionBehavior premulBehavior) const |
| |
| If target is supported, returns an SkImage in target color space. |
| Otherwise, returns nullptr. |
| This will leave the image as is if it already in target color space. |
| Otherwise, it will convert the pixels from Image color space to target |
| color space. If this->colorSpace() is nullptr, Image color space will be |
| treated as sRGB. |
| |
| If premulBehavior is SkTransferFunctionBehavior::kRespect: converts Image |
| pixels to a linear space before converting to match destination Color_Type |
| and Color_Space. |
| If premulBehavior is SkTransferFunctionBehavior::kIgnore: Image |
| pixels are treated as if they are linear, regardless of how they are encoded. |
| |
| #Param target incomplete ## |
| #Param premulBehavior incomplete ## |
| |
| #Return incomplete ## |
| |
| #Example |
| // incomplete |
| ## |
| |
| #SeeAlso incomplete |
| |
| #Method ## |
| |
| #Class SkImage ## |
| |
| #Topic Image ## |