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Unified Diff: include/gpu/GrTypes.h

Issue 1623653002: skia: Add support for CHROMIUM_image backed textures. (Closed) Base URL: https://chromium.googlesource.com/skia.git@master
Patch Set: Add missing ')'. Created 4 years, 10 months ago
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Index: include/gpu/GrTypes.h
diff --git a/include/gpu/GrTypes.h b/include/gpu/GrTypes.h
index dbcb9a6583321d715a437a9982c7da7b5521066e..767e07206e990db701c3e30c6b95330304d6af2b 100644
--- a/include/gpu/GrTypes.h
+++ b/include/gpu/GrTypes.h
@@ -409,6 +409,9 @@ enum GrSurfaceFlags {
GR_MAKE_BITFIELD_OPS(GrSurfaceFlags)
+// opaque type for 3D API object handles
+typedef intptr_t GrBackendObject;
+
/**
* Some textures will be stored such that the upper and left edges of the content meet at the
* the origin (in texture coord space) and for other textures the lower and left edges meet at
@@ -423,6 +426,58 @@ enum GrSurfaceOrigin {
};
/**
+ * An container of function pointers which consumers of Skia can fill in and
+ * pass to Skia. Skia will use these function pointers in place of its backend
+ * API texture creation function. Either all of the function pointers should be
+ * filled in, or they should all be nullptr.
+ */
+struct GrTextureStorageAllocator {
+ GrTextureStorageAllocator()
+ : fAllocateTextureStorage(nullptr)
+ , fDeallocateTextureStorage(nullptr) {
+ }
+
+ enum class Result {
+ kSucceededAndUploaded,
+ kSucceededWithoutUpload,
+ kFailed
+ };
+ typedef Result (*AllocateTextureStorageProc)(
+ void* ctx, GrBackendObject texture, unsigned width,
+ unsigned height, GrPixelConfig config, const void* srcData, GrSurfaceOrigin);
+ typedef void (*DeallocateTextureStorageProc)(void* ctx, GrBackendObject texture);
+
+ /*
+ * Generates and binds a texture to |textureStorageTarget()|. Allocates
+ * storage for the texture.
+ *
+ * In OpenGL, the MIN and MAX filters for the created texture must be
+ * GL_LINEAR. The WRAP_S and WRAP_T must be GL_CLAMP_TO_EDGE.
+ *
+ * If |srcData| is not nullptr, then the implementation of this function
+ * may attempt to upload the data into the texture. On successful upload,
+ * or if |srcData| is nullptr, returns kSucceededAndUploaded.
+ */
+ AllocateTextureStorageProc fAllocateTextureStorage;
+
+ /*
+ * Deallocate the storage for the given texture.
+ *
+ * Skia does not always destroy its outstanding textures. See
+ * GrContext::abandonContext() for more details. The consumer of Skia is
+ * responsible for making sure that all textures are destroyed, even if this
+ * callback is not invoked.
+ */
+ DeallocateTextureStorageProc fDeallocateTextureStorage;
+
+ /*
+ * The context to use when invoking fAllocateTextureStorage and
+ * fDeallocateTextureStorage.
+ */
+ void* fCtx;
+};
+
+/**
* Describes a surface to be created.
*/
struct GrSurfaceDesc {
@@ -454,6 +509,12 @@ struct GrSurfaceDesc {
* max supported count.
*/
int fSampleCnt;
+
+ /**
+ * A custom platform-specific allocator to use in place of the backend APIs
+ * usual texture creation method (e.g. TexImage2D in OpenGL).
+ */
+ GrTextureStorageAllocator fTextureStorageAllocator;
};
// Legacy alias
@@ -469,9 +530,6 @@ enum GrClipType {
///////////////////////////////////////////////////////////////////////////////
-// opaque type for 3D API object handles
-typedef intptr_t GrBackendObject;
-
/** Ownership rules for external GPU resources imported into Skia. */
enum GrWrapOwnership {
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