1 files changed, 154 insertions, 0 deletions
diff --git a/dom/canvas/TexUnpackBlob.h b/dom/canvas/TexUnpackBlob.h
new file mode 100644
index 000000000..d2328c587
--- /dev/null
+++ b/dom/canvas/TexUnpackBlob.h
@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TEX_UNPACK_BLOB_H_
+#define TEX_UNPACK_BLOB_H_
+
+#include "GLContextTypes.h"
+#include "mozilla/RefPtr.h"
+#include "WebGLStrongTypes.h"
+#include "WebGLTypes.h"
+
+
+namespace mozilla {
+
+class UniqueBuffer;
+class WebGLContext;
+class WebGLTexture;
+
+namespace dom {
+class Element;
+class HTMLCanvasElement;
+class HTMLVideoElement;
+} // namespace dom
+
+namespace gfx {
+class DataSourceSurface;
+} // namespace gfx
+
+namespace layers {
+class Image;
+class ImageContainer;
+} // namespace layers
+
+namespace webgl {
+
+struct PackingInfo;
+struct DriverUnpackInfo;
+
+class TexUnpackBlob
+{
+public:
+    const uint32_t mAlignment;
+    const uint32_t mRowLength;
+    const uint32_t mImageHeight;
+    const uint32_t mSkipPixels;
+    const uint32_t mSkipRows;
+    const uint32_t mSkipImages;
+    const uint32_t mWidth;
+    const uint32_t mHeight;
+    const uint32_t mDepth;
+
+    const bool mSrcIsPremult;
+
+    bool mNeedsExactUpload;
+
+protected:
+    TexUnpackBlob(const WebGLContext* webgl, TexImageTarget target, uint32_t rowLength,
+                  uint32_t width, uint32_t height, uint32_t depth, bool isSrcPremult);
+
+public:
+    virtual ~TexUnpackBlob() { }
+
+protected:
+    bool ConvertIfNeeded(WebGLContext* webgl, const char* funcName,
+                         const uint32_t rowLength, const uint32_t rowCount,
+                         WebGLTexelFormat srcFormat,
+                         const uint8_t* const srcBegin, const ptrdiff_t srcStride,
+                         WebGLTexelFormat dstFormat, const ptrdiff_t dstStride,
+
+                         const uint8_t** const out_begin,
+                         UniqueBuffer* const out_anchoredBuffer) const;
+
+public:
+    virtual bool HasData() const { return true; }
+
+    virtual bool Validate(WebGLContext* webgl, const char* funcName,
+                          const webgl::PackingInfo& pi) = 0;
+
+    // Returns false when we've generated a WebGL error.
+    // Returns true but with a non-zero *out_error if we still need to generate a WebGL
+    // error.
+    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
+                               WebGLTexture* tex, TexImageTarget target, GLint level,
+                               const webgl::DriverUnpackInfo* dui, GLint xOffset,
+                               GLint yOffset, GLint zOffset,
+                               GLenum* const out_error) const = 0;
+};
+
+class TexUnpackBytes final : public TexUnpackBlob
+{
+public:
+    const bool mIsClientData;
+    const uint8_t* const mPtr;
+    const size_t mAvailBytes;
+
+    TexUnpackBytes(const WebGLContext* webgl, TexImageTarget target, uint32_t width,
+                   uint32_t height, uint32_t depth, bool isClientData, const uint8_t* ptr,
+                   size_t availBytes);
+
+    virtual bool HasData() const override { return !mIsClientData || bool(mPtr); }
+
+    virtual bool Validate(WebGLContext* webgl, const char* funcName,
+                          const webgl::PackingInfo& pi) override;
+    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
+                               WebGLTexture* tex, TexImageTarget target, GLint level,
+                               const webgl::DriverUnpackInfo* dui, GLint xOffset,
+                               GLint yOffset, GLint zOffset,
+                               GLenum* const out_error) const override;
+};
+
+class TexUnpackImage final : public TexUnpackBlob
+{
+public:
+    const RefPtr<layers::Image> mImage;
+
+    TexUnpackImage(const WebGLContext* webgl, TexImageTarget target, uint32_t width,
+                   uint32_t height, uint32_t depth, layers::Image* image,
+                   bool isAlphaPremult);
+
+    ~TexUnpackImage(); // Prevent needing to define layers::Image in the header.
+
+    virtual bool Validate(WebGLContext* webgl, const char* funcName,
+                          const webgl::PackingInfo& pi) override;
+    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
+                               WebGLTexture* tex, TexImageTarget target, GLint level,
+                               const webgl::DriverUnpackInfo* dui, GLint xOffset,
+                               GLint yOffset, GLint zOffset,
+                               GLenum* const out_error) const override;
+};
+
+class TexUnpackSurface final : public TexUnpackBlob
+{
+public:
+    const RefPtr<gfx::DataSourceSurface> mSurf;
+
+    TexUnpackSurface(const WebGLContext* webgl, TexImageTarget target, uint32_t width,
+                     uint32_t height, uint32_t depth, gfx::DataSourceSurface* surf,
+                     bool isAlphaPremult);
+
+    virtual bool Validate(WebGLContext* webgl, const char* funcName,
+                          const webgl::PackingInfo& pi) override;
+    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
+                               WebGLTexture* tex, TexImageTarget target, GLint level,
+                               const webgl::DriverUnpackInfo* dui, GLint xOffset,
+                               GLint yOffset, GLint zOffset,
+                               GLenum* const out_error) const override;
+};
+
+} // namespace webgl
+} // namespace mozilla
+
+#endif // TEX_UNPACK_BLOB_H_