Add query to imagegenerator if it can efficiently generate a texture
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3780
Change-Id: If5fb6ee82e47f0d007b4ad7c46ac73574eccd8c5
Reviewed-on: https://skia-review.googlesource.com/3780
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/include/core/SkImageGenerator.h b/include/core/SkImageGenerator.h
index 3712a92..f815898 100644
--- a/include/core/SkImageGenerator.h
+++ b/include/core/SkImageGenerator.h
@@ -14,6 +14,7 @@
#include "SkYUVSizeInfo.h"
class GrContext;
+class GrContextThreadSafeProxy;
class GrTexture;
class GrTextureParams;
class SkBitmap;
@@ -152,6 +153,15 @@
bool getYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]);
/**
+ * Returns true if the generate can efficiently return a texture (given the properties of the
+ * proxy). By default, simple codecs will usually return false, since they must be decoded
+ * on the CPU and then uploaded to become a texture.
+ */
+ bool canGenerateTexture(const GrContextThreadSafeProxy& proxy) {
+ return this->onCanGenerateTexture(proxy);
+ }
+
+ /**
* If the generator can natively/efficiently return its pixels as a GPU image (backed by a
* texture) this will return that image. If not, this will return NULL.
*
@@ -269,6 +279,9 @@
return false;
}
+ virtual bool onCanGenerateTexture(const GrContextThreadSafeProxy&) {
+ return false;
+ }
virtual GrTexture* onGenerateTexture(GrContext*, const SkIRect*) {
return nullptr;
}
diff --git a/src/core/SkPictureImageGenerator.cpp b/src/core/SkPictureImageGenerator.cpp
index 6f4ffa1..68742ca 100644
--- a/src/core/SkPictureImageGenerator.cpp
+++ b/src/core/SkPictureImageGenerator.cpp
@@ -26,6 +26,9 @@
bool onGenerateScaledPixels(const SkISize&, const SkIPoint&, const SkPixmap&) override;
#if SK_SUPPORT_GPU
+ bool onCanGenerateTexture(const GrContextThreadSafeProxy&) override {
+ return true;
+ }
GrTexture* onGenerateTexture(GrContext*, const SkIRect*) override;
#endif
