working on SkImage docs
also fix minor break in SkSurface
TBR=caryclark@google.com
Docs-Preview: https://skia.org/?cl=105021
Bug: skia:
Change-Id: I0cfc01ab5ba4df13a9e84f8dd2904d32e5726a5b
Reviewed-on: https://skia-review.googlesource.com/105021
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@skia.org>
diff --git a/docs/SkImage_Reference.bmh b/docs/SkImage_Reference.bmh
index d933a07..dc4d4ef 100644
--- a/docs/SkImage_Reference.bmh
+++ b/docs/SkImage_Reference.bmh
@@ -418,7 +418,7 @@
int x = 0;
for (auto origin : { kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin } ) {
sk_sp<SkImage> image = SkImage::MakeFromTexture(context, backEndTexture,
- origin, kOpaque_SkAlphaType, nullptr);
+ origin, kN32_SkColorType, kOpaque_SkAlphaType, nullptr);
canvas->drawImage(image, x, 0);
x += 512;
}
@@ -817,7 +817,7 @@
# currently uncalled by any test or client ##
#Bug 7424
-#Enum BitDepth
+#EnumClass BitDepth
#Code
enum class BitDepth {
@@ -838,7 +838,7 @@
#SeeAlso MakeFromPicture
-#Enum ##
+#EnumClass ##
# ------------------------------------------------------------------------------
@@ -2001,7 +2001,7 @@
drawImage(textureImage, "backEndTexture");
##
-#SeeAlso incomplete
+#SeeAlso makeTextureImage makeRasterImage MakeBackendTextureFromSkImage
#Method ##
@@ -2064,19 +2064,17 @@
Returns nullptr if Image could not be created. If nullptr is returned, outSubset
and offset are undefined.
-makeWithFilter is optimized to support Image backed by GPU_Texture drawn in an
-animation with SkImageFilter that vary in size from one frame to the next. The
-created Image is drawn at an increased size so that GPU_Texture can be reused
-with different sized effects. outSubset describes the valid bounds of GPU_Texture
-returned. The returned Image may be much larger than required for the filter.
-offset translates the returned Image to keep subsequent animation frames
-aligned with respect to each other.
+Useful for animation of SkImageFilter that varies size from frame to frame.
+Returned Image is created larger than required by filter so that GPU_Texture
+can be reused with different sized effects. outSubset describes the valid bounds
+of GPU_Texture returned. offset translates the returned Image to keep subsequent
+animation frames aligned with respect to each other.
#Param filter how Image is sampled when transformed ##
-#Param subset incomplete ##
-#Param clipBounds incomplete ##
-#Param outSubset incomplete ##
-#Param offset incomplete ##
+#Param subset bounds of Image processed by filter ##
+#Param clipBounds expected bounds of filtered Image ##
+#Param outSubset storage for returned Image bounds ##
+#Param offset storage for returned Image translation ##
#Return filtered Image, or nullptr ##
@@ -2109,7 +2107,7 @@
canvas->drawRect(SkRect::MakeFromIRect(outSubset), paint);
##
-#SeeAlso SkPaint::setImageFilter
+#SeeAlso makeShader SkPaint::setImageFilter
#Method ##
@@ -2155,64 +2153,86 @@
#In Constructor
#Line # creates GPU_Texture from Image ##
-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.
+Creates a GrBackendTexture from the provided SkImage. Returns true and
+stores result in backendTexture and backendTextureReleaseProc if
+texture is created; otherwise, returns false and leaves
+backendTexture and backendTextureReleaseProc unmodified.
-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.
+Call backendTextureReleaseProc after deleting backendTexture.
+backendTextureReleaseProc cleans up auxiliary data related to returned
+backendTexture. The caller must delete returned backendTexture after use.
-If Image is not texture backed, this function returns texture with Image
-contents.
+If Image is both texture backed and singly referenced, image is returned in
+backendTexture without conversion or making a copy. Image is singly referenced
+if its was transferred solely using std::move().
+
+If Image is not texture backed, returns texture with Image contents.
#Param context GPU_Context ##
-#Param image incomplete ##
-#Param backendTexture incomplete ##
-#Param backendTextureReleaseProc incomplete ##
+#Param image Image used for texture ##
+#Param backendTexture storage for backend texture ##
+#Param backendTextureReleaseProc storage for clean up function ##
-#Return incomplete ##
+#Return true if backend texture was created ##
#Example
-// incomplete
+#Platform gpu
+#Height 64
+#Function
+static sk_sp<SkImage> create_gpu_image(GrContext* grContext) {
+ const SkImageInfo info = SkImageInfo::MakeN32(20, 20, kOpaque_SkAlphaType);
+ auto surface(SkSurface::MakeRenderTarget(grContext, SkBudgeted::kNo, info));
+ SkCanvas* canvas = surface->getCanvas();
+ canvas->clear(SK_ColorWHITE);
+ SkPaint paint;
+ paint.setColor(SK_ColorBLACK);
+ canvas->drawRect(SkRect::MakeXYWH(5, 5, 10, 10), paint);
+ return surface->makeImageSnapshot();
+}
+##
+
+void draw(SkCanvas* canvas) {
+ GrContext* grContext = canvas->getGrContext();
+ if (!grContext) {
+ return;
+ }
+ sk_sp<SkImage> backEndImage = create_gpu_image(grContext);
+ canvas->drawImage(backEndImage, 0, 0);
+ GrBackendTexture texture;
+ SkImage::BackendTextureReleaseProc proc;
+ if (!SkImage::MakeBackendTextureFromSkImage(grContext, std::move(backEndImage),
+ &texture, &proc)) {
+ return;
+ }
+ sk_sp<SkImage> i2 = SkImage::MakeFromTexture(grContext, texture, kTopLeft_GrSurfaceOrigin,
+ kN32_SkColorType, kOpaque_SkAlphaType, nullptr);
+ canvas->drawImage(i2, 30, 30);
+}
##
-#SeeAlso incomplete
+#SeeAlso MakeFromTexture makeTextureImage
#Method ##
# ------------------------------------------------------------------------------
#Enum LegacyBitmapMode
-
+#Deprecated soon
#Code
enum LegacyBitmapMode {
kRO_LegacyBitmapMode,
- kRW_LegacyBitmapMode,
};
##
-Helper functions to convert to SkBitmap
-
#Const kRO_LegacyBitmapMode 0
+Returned bitmap is read-only and immutable.
##
-#Const kRW_LegacyBitmapMode 1
-##
-
-#Example
-// incomplete
-##
-
-#SeeAlso incomplete
#Enum ##
# ------------------------------------------------------------------------------
-#Method bool asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode legacyBitmapMode) const
+#Method bool asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode legacyBitmapMode = kRO_LegacyBitmapMode) const
#In Constructor
#Line # returns as Raster_Bitmap ##
Creates raster Bitmap with same pixels as Image. If legacyBitmapMode is
@@ -2221,15 +2241,30 @@
Bitmap write did not succeed.
#Param bitmap storage for legacy Bitmap ##
-#Param legacyBitmapMode one of: kRO_LegacyBitmapMode, kRW_LegacyBitmapMode ##
+#Param legacyBitmapMode to be deprecated ##
#Return true if Bitmap was created ##
#Example
-// incomplete
+#Image 4
+#Platform gpu
+ SkBitmap bitImage;
+ if (image->asLegacyBitmap(&bitImage, SkImage::kRO_LegacyBitmapMode)) {
+ canvas->drawBitmap(bitImage, 0, 0);
+ }
+ GrContext* grContext = canvas->getGrContext();
+ if (!grContext) {
+ return;
+ }
+ sk_sp<SkImage> textureImage(SkImage::MakeFromTexture(grContext, backEndTexture,
+ kTopLeft_GrSurfaceOrigin, kOpaque_SkAlphaType, nullptr));
+ canvas->drawImage(textureImage, 45, 45);
+ if (textureImage->asLegacyBitmap(&bitImage, SkImage::kRO_LegacyBitmapMode)) {
+ canvas->drawBitmap(bitImage, 90, 90);
+ }
##
-#SeeAlso incomplete
+#SeeAlso MakeRasterData makeRasterImage makeNonTextureImage
#Method ##