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-rw-r--r--dom/canvas/TexUnpackBlob.h143
1 files changed, 143 insertions, 0 deletions
diff --git a/dom/canvas/TexUnpackBlob.h b/dom/canvas/TexUnpackBlob.h
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+++ b/dom/canvas/TexUnpackBlob.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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"
+
+#include <memory>
+
+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
+
+bool IsTarget3D(TexImageTarget target);
+
+namespace webgl {
+
+struct PackingInfo;
+struct DriverUnpackInfo;
+
+Maybe<std::string> BlitPreventReason(int32_t level, const ivec3& offset,
+ const webgl::PackingInfo&,
+ const TexUnpackBlobDesc&);
+
+class TexUnpackBlob {
+ public:
+ const TexUnpackBlobDesc& mDesc;
+ bool mNeedsExactUpload = true;
+
+ static std::unique_ptr<TexUnpackBlob> Create(const TexUnpackBlobDesc&);
+
+ protected:
+ explicit TexUnpackBlob(const TexUnpackBlobDesc& desc) : mDesc(desc) {
+ MOZ_ASSERT_IF(!IsTarget3D(mDesc.imageTarget), mDesc.size.z == 1);
+ }
+
+ public:
+ virtual ~TexUnpackBlob() = default;
+
+ protected:
+ bool ConvertIfNeeded(const WebGLContext*, 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(const WebGLContext*, 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,
+ WebGLTexture* tex, GLint level,
+ const webgl::DriverUnpackInfo* dui, GLint xOffset,
+ GLint yOffset, GLint zOffset,
+ const webgl::PackingInfo& pi,
+ GLenum* const out_error) const = 0;
+};
+
+class TexUnpackBytes final : public TexUnpackBlob {
+ public:
+ explicit TexUnpackBytes(const TexUnpackBlobDesc& desc) : TexUnpackBlob(desc) {
+ MOZ_ASSERT(mDesc.srcAlphaType == gfxAlphaType::NonPremult);
+ }
+
+ virtual bool HasData() const override {
+ return mDesc.pboOffset || mDesc.cpuData;
+ }
+
+ virtual bool Validate(const WebGLContext*,
+ const webgl::PackingInfo& pi) override;
+ virtual bool TexOrSubImage(bool isSubImage, bool needsRespec,
+ WebGLTexture* tex, GLint level,
+ const webgl::DriverUnpackInfo* dui, GLint xOffset,
+ GLint yOffset, GLint zOffset,
+ const webgl::PackingInfo& pi,
+ GLenum* const out_error) const override;
+};
+
+class TexUnpackImage final : public TexUnpackBlob {
+ public:
+ explicit TexUnpackImage(const TexUnpackBlobDesc& desc)
+ : TexUnpackBlob(desc) {}
+ ~TexUnpackImage(); // Prevent needing to define layers::Image in the header.
+
+ virtual bool Validate(const WebGLContext*,
+ const webgl::PackingInfo& pi) override;
+ virtual bool TexOrSubImage(bool isSubImage, bool needsRespec,
+ WebGLTexture* tex, GLint level,
+ const webgl::DriverUnpackInfo* dui, GLint xOffset,
+ GLint yOffset, GLint zOffset,
+ const webgl::PackingInfo& dstPI,
+ GLenum* const out_error) const override;
+};
+
+class TexUnpackSurface final : public TexUnpackBlob {
+ public:
+ explicit TexUnpackSurface(const TexUnpackBlobDesc& desc)
+ : TexUnpackBlob(desc) {}
+ ~TexUnpackSurface();
+
+ virtual bool Validate(const WebGLContext*,
+ const webgl::PackingInfo& pi) override;
+ virtual bool TexOrSubImage(bool isSubImage, bool needsRespec,
+ WebGLTexture* tex, GLint level,
+ const webgl::DriverUnpackInfo* dui, GLint xOffset,
+ GLint yOffset, GLint zOffset,
+ const webgl::PackingInfo& dstPI,
+ GLenum* const out_error) const override;
+};
+
+} // namespace webgl
+} // namespace mozilla
+
+#endif // TEX_UNPACK_BLOB_H_