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Unified Diff: content/browser/compositor/gl_helper.cc

Issue 1902463002: Introduce components/display_compositor (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Remove bot changes. Will do in a separate CL Created 4 years, 8 months ago
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Index: content/browser/compositor/gl_helper.cc
diff --git a/content/browser/compositor/gl_helper.cc b/content/browser/compositor/gl_helper.cc
deleted file mode 100644
index b88e78c5eaff9c6dce91828b8ba97492383b2192..0000000000000000000000000000000000000000
--- a/content/browser/compositor/gl_helper.cc
+++ /dev/null
@@ -1,1237 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/browser/compositor/gl_helper.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <queue>
-#include <string>
-
-#include "base/bind.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop.h"
-#include "base/strings/string_util.h"
-#include "base/time/time.h"
-#include "base/trace_event/trace_event.h"
-#include "content/browser/compositor/gl_helper_readback_support.h"
-#include "content/browser/compositor/gl_helper_scaling.h"
-#include "gpu/GLES2/gl2extchromium.h"
-#include "gpu/command_buffer/client/context_support.h"
-#include "gpu/command_buffer/common/mailbox.h"
-#include "gpu/command_buffer/common/mailbox_holder.h"
-#include "third_party/skia/include/core/SkRegion.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/geometry/size.h"
-
-using gpu::gles2::GLES2Interface;
-
-namespace {
-
-class ScopedFlush {
- public:
- explicit ScopedFlush(gpu::gles2::GLES2Interface* gl) : gl_(gl) {}
-
- ~ScopedFlush() { gl_->Flush(); }
-
- private:
- gpu::gles2::GLES2Interface* gl_;
-
- DISALLOW_COPY_AND_ASSIGN(ScopedFlush);
-};
-
-// Helper class for allocating and holding an RGBA texture of a given
-// size and an associated framebuffer.
-class TextureFrameBufferPair {
- public:
- TextureFrameBufferPair(GLES2Interface* gl, gfx::Size size)
- : texture_(gl), framebuffer_(gl), size_(size) {
- content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl, texture_);
- gl->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.width(), size.height(), 0,
- GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- content::ScopedFramebufferBinder<GL_FRAMEBUFFER> framebuffer_binder(
- gl, framebuffer_);
- gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
- GL_TEXTURE_2D, texture_, 0);
- }
-
- GLuint texture() const { return texture_.id(); }
- GLuint framebuffer() const { return framebuffer_.id(); }
- gfx::Size size() const { return size_; }
-
- private:
- content::ScopedTexture texture_;
- content::ScopedFramebuffer framebuffer_;
- gfx::Size size_;
-
- DISALLOW_COPY_AND_ASSIGN(TextureFrameBufferPair);
-};
-
-// Helper class for holding a scaler, a texture for the output of that
-// scaler and an associated frame buffer. This is inteded to be used
-// when the output of a scaler is to be sent to a readback.
-class ScalerHolder {
- public:
- ScalerHolder(GLES2Interface* gl, content::GLHelper::ScalerInterface* scaler)
- : texture_and_framebuffer_(gl, scaler->DstSize()), scaler_(scaler) {}
-
- void Scale(GLuint src_texture) {
- scaler_->Scale(src_texture, texture_and_framebuffer_.texture());
- }
-
- content::GLHelper::ScalerInterface* scaler() const { return scaler_.get(); }
- TextureFrameBufferPair* texture_and_framebuffer() {
- return &texture_and_framebuffer_;
- }
- GLuint texture() const { return texture_and_framebuffer_.texture(); }
-
- private:
- TextureFrameBufferPair texture_and_framebuffer_;
- std::unique_ptr<content::GLHelper::ScalerInterface> scaler_;
-
- DISALLOW_COPY_AND_ASSIGN(ScalerHolder);
-};
-
-} // namespace
-
-namespace content {
-typedef GLHelperReadbackSupport::FormatSupport FormatSupport;
-
-// Implements GLHelper::CropScaleReadbackAndCleanTexture and encapsulates
-// the data needed for it.
-class GLHelper::CopyTextureToImpl
- : public base::SupportsWeakPtr<GLHelper::CopyTextureToImpl> {
- public:
- CopyTextureToImpl(GLES2Interface* gl,
- gpu::ContextSupport* context_support,
- GLHelper* helper)
- : gl_(gl),
- context_support_(context_support),
- helper_(helper),
- flush_(gl),
- max_draw_buffers_(0) {
- const GLubyte* extensions = gl_->GetString(GL_EXTENSIONS);
- if (!extensions)
- return;
- std::string extensions_string =
- " " + std::string(reinterpret_cast<const char*>(extensions)) + " ";
- if (extensions_string.find(" GL_EXT_draw_buffers ") != std::string::npos) {
- gl_->GetIntegerv(GL_MAX_DRAW_BUFFERS_EXT, &max_draw_buffers_);
- }
- }
- ~CopyTextureToImpl() { CancelRequests(); }
-
- GLuint ConsumeMailboxToTexture(const gpu::Mailbox& mailbox,
- const gpu::SyncToken& sync_token) {
- return helper_->ConsumeMailboxToTexture(mailbox, sync_token);
- }
-
- void CropScaleReadbackAndCleanTexture(
- GLuint src_texture,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- unsigned char* out,
- const SkColorType out_color_type,
- const base::Callback<void(bool)>& callback,
- GLHelper::ScalerQuality quality);
-
- void ReadbackTextureSync(GLuint texture,
- const gfx::Rect& src_rect,
- unsigned char* out,
- SkColorType format);
-
- void ReadbackTextureAsync(GLuint texture,
- const gfx::Size& dst_size,
- unsigned char* out,
- SkColorType color_type,
- const base::Callback<void(bool)>& callback);
-
- // Reads back bytes from the currently bound frame buffer.
- // Note that dst_size is specified in bytes, not pixels.
- void ReadbackAsync(
- const gfx::Size& dst_size,
- int32_t bytes_per_row, // generally dst_size.width() * 4
- int32_t row_stride_bytes, // generally dst_size.width() * 4
- unsigned char* out,
- GLenum format,
- GLenum type,
- size_t bytes_per_pixel,
- const base::Callback<void(bool)>& callback);
-
- void ReadbackPlane(TextureFrameBufferPair* source,
- int row_stride_bytes,
- unsigned char* data,
- int size_shift,
- const gfx::Rect& paste_rect,
- ReadbackSwizzle swizzle,
- const base::Callback<void(bool)>& callback);
-
- GLuint CopyAndScaleTexture(GLuint texture,
- const gfx::Size& src_size,
- const gfx::Size& dst_size,
- bool vertically_flip_texture,
- GLHelper::ScalerQuality quality);
-
- ReadbackYUVInterface* CreateReadbackPipelineYUV(
- GLHelper::ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- bool use_mrt);
-
- // Returns the maximum number of draw buffers available,
- // 0 if GL_EXT_draw_buffers is not available.
- GLint MaxDrawBuffers() const { return max_draw_buffers_; }
-
- FormatSupport GetReadbackConfig(SkColorType color_type,
- bool can_swizzle,
- GLenum* format,
- GLenum* type,
- size_t* bytes_per_pixel);
-
- private:
- // A single request to CropScaleReadbackAndCleanTexture.
- // The main thread can cancel the request, before it's handled by the helper
- // thread, by resetting the texture and pixels fields. Alternatively, the
- // thread marks that it handles the request by resetting the pixels field
- // (meaning it guarantees that the callback with be called).
- // In either case, the callback must be called exactly once, and the texture
- // must be deleted by the main thread gl.
- struct Request {
- Request(const gfx::Size& size_,
- int32_t bytes_per_row_,
- int32_t row_stride_bytes_,
- unsigned char* pixels_,
- const base::Callback<void(bool)>& callback_)
- : done(false),
- size(size_),
- bytes_per_row(bytes_per_row_),
- row_stride_bytes(row_stride_bytes_),
- pixels(pixels_),
- callback(callback_),
- buffer(0),
- query(0) {}
-
- bool done;
- bool result;
- gfx::Size size;
- int bytes_per_row;
- int row_stride_bytes;
- unsigned char* pixels;
- base::Callback<void(bool)> callback;
- GLuint buffer;
- GLuint query;
- };
-
- // We must take care to call the callbacks last, as they may
- // end up destroying the gl_helper and make *this invalid.
- // We stick the finished requests in a stack object that calls
- // the callbacks when it goes out of scope.
- class FinishRequestHelper {
- public:
- FinishRequestHelper() {}
- ~FinishRequestHelper() {
- while (!requests_.empty()) {
- Request* request = requests_.front();
- requests_.pop();
- request->callback.Run(request->result);
- delete request;
- }
- }
- void Add(Request* r) { requests_.push(r); }
-
- private:
- std::queue<Request*> requests_;
- DISALLOW_COPY_AND_ASSIGN(FinishRequestHelper);
- };
-
- // A readback pipeline that also converts the data to YUV before
- // reading it back.
- class ReadbackYUVImpl : public ReadbackYUVInterface {
- public:
- ReadbackYUVImpl(GLES2Interface* gl,
- CopyTextureToImpl* copy_impl,
- GLHelperScaling* scaler_impl,
- GLHelper::ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- ReadbackSwizzle swizzle);
-
- void ReadbackYUV(const gpu::Mailbox& mailbox,
- const gpu::SyncToken& sync_token,
- const gfx::Rect& target_visible_rect,
- int y_plane_row_stride_bytes,
- unsigned char* y_plane_data,
- int u_plane_row_stride_bytes,
- unsigned char* u_plane_data,
- int v_plane_row_stride_bytes,
- unsigned char* v_plane_data,
- const gfx::Point& paste_location,
- const base::Callback<void(bool)>& callback) override;
-
- ScalerInterface* scaler() override { return scaler_.scaler(); }
-
- private:
- GLES2Interface* gl_;
- CopyTextureToImpl* copy_impl_;
- gfx::Size dst_size_;
- ReadbackSwizzle swizzle_;
- ScalerHolder scaler_;
- ScalerHolder y_;
- ScalerHolder u_;
- ScalerHolder v_;
-
- DISALLOW_COPY_AND_ASSIGN(ReadbackYUVImpl);
- };
-
- // A readback pipeline that also converts the data to YUV before
- // reading it back. This one uses Multiple Render Targets, which
- // may not be supported on all platforms.
- class ReadbackYUV_MRT : public ReadbackYUVInterface {
- public:
- ReadbackYUV_MRT(GLES2Interface* gl,
- CopyTextureToImpl* copy_impl,
- GLHelperScaling* scaler_impl,
- GLHelper::ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- ReadbackSwizzle swizzle);
-
- void ReadbackYUV(const gpu::Mailbox& mailbox,
- const gpu::SyncToken& sync_token,
- const gfx::Rect& target_visible_rect,
- int y_plane_row_stride_bytes,
- unsigned char* y_plane_data,
- int u_plane_row_stride_bytes,
- unsigned char* u_plane_data,
- int v_plane_row_stride_bytes,
- unsigned char* v_plane_data,
- const gfx::Point& paste_location,
- const base::Callback<void(bool)>& callback) override;
-
- ScalerInterface* scaler() override { return scaler_.scaler(); }
-
- private:
- GLES2Interface* gl_;
- CopyTextureToImpl* copy_impl_;
- gfx::Size dst_size_;
- GLHelper::ScalerQuality quality_;
- ReadbackSwizzle swizzle_;
- ScalerHolder scaler_;
- std::unique_ptr<content::GLHelperScaling::ShaderInterface> pass1_shader_;
- std::unique_ptr<content::GLHelperScaling::ShaderInterface> pass2_shader_;
- TextureFrameBufferPair y_;
- ScopedTexture uv_;
- TextureFrameBufferPair u_;
- TextureFrameBufferPair v_;
-
- DISALLOW_COPY_AND_ASSIGN(ReadbackYUV_MRT);
- };
-
- // Copies the block of pixels specified with |src_subrect| from |src_texture|,
- // scales it to |dst_size|, writes it into a texture, and returns its ID.
- // |src_size| is the size of |src_texture|.
- GLuint ScaleTexture(GLuint src_texture,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool vertically_flip_texture,
- bool swizzle,
- SkColorType color_type,
- GLHelper::ScalerQuality quality);
-
- // Converts each four consecutive pixels of the source texture into one pixel
- // in the result texture with each pixel channel representing the grayscale
- // color of one of the four original pixels:
- // R1G1B1A1 R2G2B2A2 R3G3B3A3 R4G4B4A4 -> X1X2X3X4
- // The resulting texture is still an RGBA texture (which is ~4 times narrower
- // than the original). If rendered directly, it wouldn't show anything useful,
- // but the data in it can be used to construct a grayscale image.
- // |encoded_texture_size| is the exact size of the resulting RGBA texture. It
- // is equal to src_size.width()/4 rounded upwards. Some channels in the last
- // pixel ((-src_size.width()) % 4) to be exact) are padding and don't contain
- // useful data.
- // If swizzle is set to true, the transformed pixels are reordered:
- // R1G1B1A1 R2G2B2A2 R3G3B3A3 R4G4B4A4 -> X3X2X1X4.
- GLuint EncodeTextureAsGrayscale(GLuint src_texture,
- const gfx::Size& src_size,
- gfx::Size* const encoded_texture_size,
- bool vertically_flip_texture,
- bool swizzle);
-
- static void nullcallback(bool success) {}
- void ReadbackDone(Request* request, int bytes_per_pixel);
- void FinishRequest(Request* request,
- bool result,
- FinishRequestHelper* helper);
- void CancelRequests();
-
- static const float kRGBtoYColorWeights[];
- static const float kRGBtoUColorWeights[];
- static const float kRGBtoVColorWeights[];
- static const float kRGBtoGrayscaleColorWeights[];
-
- GLES2Interface* gl_;
- gpu::ContextSupport* context_support_;
- GLHelper* helper_;
-
- // A scoped flush that will ensure all resource deletions are flushed when
- // this object is destroyed. Must be declared before other Scoped* fields.
- ScopedFlush flush_;
-
- std::queue<Request*> request_queue_;
- GLint max_draw_buffers_;
-};
-
-GLHelper::ScalerInterface* GLHelper::CreateScaler(ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool vertically_flip_texture,
- bool swizzle) {
- InitScalerImpl();
- return scaler_impl_->CreateScaler(quality, src_size, src_subrect, dst_size,
- vertically_flip_texture, swizzle);
-}
-
-GLuint GLHelper::CopyTextureToImpl::ScaleTexture(
- GLuint src_texture,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool vertically_flip_texture,
- bool swizzle,
- SkColorType color_type,
- GLHelper::ScalerQuality quality) {
- GLuint dst_texture = 0u;
- gl_->GenTextures(1, &dst_texture);
- {
- GLenum format = GL_RGBA, type = GL_UNSIGNED_BYTE;
- ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, dst_texture);
-
- // Use GL_RGBA for destination/temporary texture unless we're working with
- // 16-bit data
- if (color_type == kRGB_565_SkColorType) {
- format = GL_RGB;
- type = GL_UNSIGNED_SHORT_5_6_5;
- }
-
- gl_->TexImage2D(GL_TEXTURE_2D, 0, format, dst_size.width(),
- dst_size.height(), 0, format, type, NULL);
- }
- std::unique_ptr<ScalerInterface> scaler(
- helper_->CreateScaler(quality, src_size, src_subrect, dst_size,
- vertically_flip_texture, swizzle));
- scaler->Scale(src_texture, dst_texture);
- return dst_texture;
-}
-
-GLuint GLHelper::CopyTextureToImpl::EncodeTextureAsGrayscale(
- GLuint src_texture,
- const gfx::Size& src_size,
- gfx::Size* const encoded_texture_size,
- bool vertically_flip_texture,
- bool swizzle) {
- GLuint dst_texture = 0u;
- gl_->GenTextures(1, &dst_texture);
- // The size of the encoded texture.
- *encoded_texture_size =
- gfx::Size((src_size.width() + 3) / 4, src_size.height());
- {
- ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, dst_texture);
- gl_->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, encoded_texture_size->width(),
- encoded_texture_size->height(), 0, GL_RGBA,
- GL_UNSIGNED_BYTE, NULL);
- }
-
- helper_->InitScalerImpl();
- std::unique_ptr<ScalerInterface> grayscale_scaler(
- helper_->scaler_impl_.get()->CreatePlanarScaler(
- src_size,
- gfx::Rect(0, 0, (src_size.width() + 3) & ~3, src_size.height()),
- *encoded_texture_size, vertically_flip_texture, swizzle,
- kRGBtoGrayscaleColorWeights));
- grayscale_scaler->Scale(src_texture, dst_texture);
- return dst_texture;
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackAsync(
- const gfx::Size& dst_size,
- int32_t bytes_per_row,
- int32_t row_stride_bytes,
- unsigned char* out,
- GLenum format,
- GLenum type,
- size_t bytes_per_pixel,
- const base::Callback<void(bool)>& callback) {
- TRACE_EVENT0("gpu.capture", "GLHelper::CopyTextureToImpl::ReadbackAsync");
- Request* request =
- new Request(dst_size, bytes_per_row, row_stride_bytes, out, callback);
- request_queue_.push(request);
- request->buffer = 0u;
-
- gl_->GenBuffers(1, &request->buffer);
- gl_->BindBuffer(GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM, request->buffer);
- gl_->BufferData(GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM,
- bytes_per_pixel * dst_size.GetArea(), NULL, GL_STREAM_READ);
-
- request->query = 0u;
- gl_->GenQueriesEXT(1, &request->query);
- gl_->BeginQueryEXT(GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM, request->query);
- gl_->ReadPixels(0, 0, dst_size.width(), dst_size.height(), format, type,
- NULL);
- gl_->EndQueryEXT(GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM);
- gl_->BindBuffer(GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM, 0);
- context_support_->SignalQuery(
- request->query, base::Bind(&CopyTextureToImpl::ReadbackDone, AsWeakPtr(),
- request, bytes_per_pixel));
-}
-
-void GLHelper::CopyTextureToImpl::CropScaleReadbackAndCleanTexture(
- GLuint src_texture,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- unsigned char* out,
- const SkColorType out_color_type,
- const base::Callback<void(bool)>& callback,
- GLHelper::ScalerQuality quality) {
- GLenum format, type;
- size_t bytes_per_pixel;
- SkColorType readback_color_type = out_color_type;
- // Single-component textures are not supported by all GPUs, so we implement
- // kAlpha_8_SkColorType support here via a special encoding (see below) using
- // a 32-bit texture to represent an 8-bit image.
- // Thus we use generic 32-bit readback in this case.
- if (out_color_type == kAlpha_8_SkColorType) {
- readback_color_type = kRGBA_8888_SkColorType;
- }
-
- FormatSupport supported = GetReadbackConfig(readback_color_type, true,
- &format, &type, &bytes_per_pixel);
-
- if (supported == GLHelperReadbackSupport::NOT_SUPPORTED) {
- callback.Run(false);
- return;
- }
-
- GLuint texture = src_texture;
-
- // Scale texture if needed
- // Optimization: SCALER_QUALITY_FAST is just a single bilinear pass, which we
- // can do just as well in EncodeTextureAsGrayscale, which we will do if
- // out_color_type is kAlpha_8_SkColorType, so let's skip the scaling step
- // in that case.
- bool scale_texture = out_color_type != kAlpha_8_SkColorType ||
- quality != GLHelper::SCALER_QUALITY_FAST;
- if (scale_texture) {
- // Don't swizzle during the scale step for kAlpha_8_SkColorType.
- // We will swizzle in the encode step below if needed.
- bool scale_swizzle = out_color_type == kAlpha_8_SkColorType
- ? false
- : supported == GLHelperReadbackSupport::SWIZZLE;
- texture = ScaleTexture(src_texture, src_size, src_subrect, dst_size, true,
- scale_swizzle, out_color_type == kAlpha_8_SkColorType
- ? kN32_SkColorType
- : out_color_type,
- quality);
- DCHECK(texture);
- }
-
- gfx::Size readback_texture_size = dst_size;
- // Encode texture to grayscale if needed.
- if (out_color_type == kAlpha_8_SkColorType) {
- // Do the vertical flip here if we haven't already done it when we scaled
- // the texture.
- bool encode_as_grayscale_vertical_flip = !scale_texture;
- // EncodeTextureAsGrayscale by default creates a texture which should be
- // read back as RGBA, so need to swizzle if the readback format is BGRA.
- bool encode_as_grayscale_swizzle = format == GL_BGRA_EXT;
- GLuint tmp_texture = EncodeTextureAsGrayscale(
- texture, dst_size, &readback_texture_size,
- encode_as_grayscale_vertical_flip, encode_as_grayscale_swizzle);
- // If the scaled texture was created - delete it
- if (scale_texture)
- gl_->DeleteTextures(1, &texture);
- texture = tmp_texture;
- DCHECK(texture);
- }
-
- // Readback the pixels of the resulting texture
- ScopedFramebuffer dst_framebuffer(gl_);
- ScopedFramebufferBinder<GL_FRAMEBUFFER> framebuffer_binder(gl_,
- dst_framebuffer);
- ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
- texture, 0);
-
- int32_t bytes_per_row = out_color_type == kAlpha_8_SkColorType
- ? dst_size.width()
- : dst_size.width() * bytes_per_pixel;
-
- ReadbackAsync(readback_texture_size, bytes_per_row, bytes_per_row, out,
- format, type, bytes_per_pixel, callback);
- gl_->DeleteTextures(1, &texture);
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackTextureSync(GLuint texture,
- const gfx::Rect& src_rect,
- unsigned char* out,
- SkColorType color_type) {
- GLenum format, type;
- size_t bytes_per_pixel;
- FormatSupport supported =
- GetReadbackConfig(color_type, false, &format, &type, &bytes_per_pixel);
- if (supported == GLHelperReadbackSupport::NOT_SUPPORTED) {
- return;
- }
-
- ScopedFramebuffer dst_framebuffer(gl_);
- ScopedFramebufferBinder<GL_FRAMEBUFFER> framebuffer_binder(gl_,
- dst_framebuffer);
- ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
- texture, 0);
- gl_->ReadPixels(src_rect.x(), src_rect.y(), src_rect.width(),
- src_rect.height(), format, type, out);
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackTextureAsync(
- GLuint texture,
- const gfx::Size& dst_size,
- unsigned char* out,
- SkColorType color_type,
- const base::Callback<void(bool)>& callback) {
- GLenum format, type;
- size_t bytes_per_pixel;
- FormatSupport supported =
- GetReadbackConfig(color_type, false, &format, &type, &bytes_per_pixel);
- if (supported == GLHelperReadbackSupport::NOT_SUPPORTED) {
- callback.Run(false);
- return;
- }
-
- ScopedFramebuffer dst_framebuffer(gl_);
- ScopedFramebufferBinder<GL_FRAMEBUFFER> framebuffer_binder(gl_,
- dst_framebuffer);
- ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
- texture, 0);
- ReadbackAsync(dst_size, dst_size.width() * bytes_per_pixel,
- dst_size.width() * bytes_per_pixel, out, format, type,
- bytes_per_pixel, callback);
-}
-
-GLuint GLHelper::CopyTextureToImpl::CopyAndScaleTexture(
- GLuint src_texture,
- const gfx::Size& src_size,
- const gfx::Size& dst_size,
- bool vertically_flip_texture,
- GLHelper::ScalerQuality quality) {
- return ScaleTexture(src_texture, src_size, gfx::Rect(src_size), dst_size,
- vertically_flip_texture, false,
- kRGBA_8888_SkColorType, // GL_RGBA
- quality);
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackDone(Request* finished_request,
- int bytes_per_pixel) {
- TRACE_EVENT0("gpu.capture",
- "GLHelper::CopyTextureToImpl::CheckReadbackFramebufferComplete");
- finished_request->done = true;
-
- FinishRequestHelper finish_request_helper;
-
- // We process transfer requests in the order they were received, regardless
- // of the order we get the callbacks in.
- while (!request_queue_.empty()) {
- Request* request = request_queue_.front();
- if (!request->done) {
- break;
- }
-
- bool result = false;
- if (request->buffer != 0) {
- gl_->BindBuffer(GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM, request->buffer);
- unsigned char* data = static_cast<unsigned char*>(gl_->MapBufferCHROMIUM(
- GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM, GL_READ_ONLY));
- if (data) {
- result = true;
- if (request->bytes_per_row == request->size.width() * bytes_per_pixel &&
- request->bytes_per_row == request->row_stride_bytes) {
- memcpy(request->pixels, data,
- request->size.GetArea() * bytes_per_pixel);
- } else {
- unsigned char* out = request->pixels;
- for (int y = 0; y < request->size.height(); y++) {
- memcpy(out, data, request->bytes_per_row);
- out += request->row_stride_bytes;
- data += request->size.width() * bytes_per_pixel;
- }
- }
- gl_->UnmapBufferCHROMIUM(GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM);
- }
- gl_->BindBuffer(GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM, 0);
- }
- FinishRequest(request, result, &finish_request_helper);
- }
-}
-
-void GLHelper::CopyTextureToImpl::FinishRequest(
- Request* request,
- bool result,
- FinishRequestHelper* finish_request_helper) {
- TRACE_EVENT0("gpu.capture", "GLHelper::CopyTextureToImpl::FinishRequest");
- DCHECK(request_queue_.front() == request);
- request_queue_.pop();
- request->result = result;
- ScopedFlush flush(gl_);
- if (request->query != 0) {
- gl_->DeleteQueriesEXT(1, &request->query);
- request->query = 0;
- }
- if (request->buffer != 0) {
- gl_->DeleteBuffers(1, &request->buffer);
- request->buffer = 0;
- }
- finish_request_helper->Add(request);
-}
-
-void GLHelper::CopyTextureToImpl::CancelRequests() {
- FinishRequestHelper finish_request_helper;
- while (!request_queue_.empty()) {
- Request* request = request_queue_.front();
- FinishRequest(request, false, &finish_request_helper);
- }
-}
-
-FormatSupport GLHelper::CopyTextureToImpl::GetReadbackConfig(
- SkColorType color_type,
- bool can_swizzle,
- GLenum* format,
- GLenum* type,
- size_t* bytes_per_pixel) {
- return helper_->readback_support_->GetReadbackConfig(
- color_type, can_swizzle, format, type, bytes_per_pixel);
-}
-
-GLHelper::GLHelper(GLES2Interface* gl, gpu::ContextSupport* context_support)
- : gl_(gl),
- context_support_(context_support),
- readback_support_(new GLHelperReadbackSupport(gl)) {}
-
-GLHelper::~GLHelper() {}
-
-void GLHelper::CropScaleReadbackAndCleanTexture(
- GLuint src_texture,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- unsigned char* out,
- const SkColorType out_color_type,
- const base::Callback<void(bool)>& callback,
- GLHelper::ScalerQuality quality) {
- InitCopyTextToImpl();
- copy_texture_to_impl_->CropScaleReadbackAndCleanTexture(
- src_texture, src_size, src_subrect, dst_size, out, out_color_type,
- callback, quality);
-}
-
-void GLHelper::CropScaleReadbackAndCleanMailbox(
- const gpu::Mailbox& src_mailbox,
- const gpu::SyncToken& sync_token,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- unsigned char* out,
- const SkColorType out_color_type,
- const base::Callback<void(bool)>& callback,
- GLHelper::ScalerQuality quality) {
- GLuint mailbox_texture = ConsumeMailboxToTexture(src_mailbox, sync_token);
- CropScaleReadbackAndCleanTexture(mailbox_texture, src_size, src_subrect,
- dst_size, out, out_color_type, callback,
- quality);
- gl_->DeleteTextures(1, &mailbox_texture);
-}
-
-void GLHelper::ReadbackTextureSync(GLuint texture,
- const gfx::Rect& src_rect,
- unsigned char* out,
- SkColorType format) {
- InitCopyTextToImpl();
- copy_texture_to_impl_->ReadbackTextureSync(texture, src_rect, out, format);
-}
-
-void GLHelper::ReadbackTextureAsync(
- GLuint texture,
- const gfx::Size& dst_size,
- unsigned char* out,
- SkColorType color_type,
- const base::Callback<void(bool)>& callback) {
- InitCopyTextToImpl();
- copy_texture_to_impl_->ReadbackTextureAsync(texture, dst_size, out,
- color_type, callback);
-}
-
-GLuint GLHelper::CopyTexture(GLuint texture, const gfx::Size& size) {
- InitCopyTextToImpl();
- return copy_texture_to_impl_->CopyAndScaleTexture(
- texture, size, size, false, GLHelper::SCALER_QUALITY_FAST);
-}
-
-GLuint GLHelper::CopyAndScaleTexture(GLuint texture,
- const gfx::Size& src_size,
- const gfx::Size& dst_size,
- bool vertically_flip_texture,
- ScalerQuality quality) {
- InitCopyTextToImpl();
- return copy_texture_to_impl_->CopyAndScaleTexture(
- texture, src_size, dst_size, vertically_flip_texture, quality);
-}
-
-GLuint GLHelper::CompileShaderFromSource(const GLchar* source, GLenum type) {
- GLuint shader = gl_->CreateShader(type);
- GLint length = strlen(source);
- gl_->ShaderSource(shader, 1, &source, &length);
- gl_->CompileShader(shader);
- GLint compile_status = 0;
- gl_->GetShaderiv(shader, GL_COMPILE_STATUS, &compile_status);
- if (!compile_status) {
- GLint log_length = 0;
- gl_->GetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
- if (log_length) {
- std::unique_ptr<GLchar[]> log(new GLchar[log_length]);
- GLsizei returned_log_length = 0;
- gl_->GetShaderInfoLog(shader, log_length, &returned_log_length,
- log.get());
- LOG(ERROR) << std::string(log.get(), returned_log_length);
- }
- gl_->DeleteShader(shader);
- return 0;
- }
- return shader;
-}
-
-void GLHelper::InitCopyTextToImpl() {
- // Lazily initialize |copy_texture_to_impl_|
- if (!copy_texture_to_impl_)
- copy_texture_to_impl_.reset(
- new CopyTextureToImpl(gl_, context_support_, this));
-}
-
-void GLHelper::InitScalerImpl() {
- // Lazily initialize |scaler_impl_|
- if (!scaler_impl_)
- scaler_impl_.reset(new GLHelperScaling(gl_, this));
-}
-
-GLint GLHelper::MaxDrawBuffers() {
- InitCopyTextToImpl();
- return copy_texture_to_impl_->MaxDrawBuffers();
-}
-
-void GLHelper::CopySubBufferDamage(GLenum target,
- GLuint texture,
- GLuint previous_texture,
- const SkRegion& new_damage,
- const SkRegion& old_damage) {
- SkRegion region(old_damage);
- if (region.op(new_damage, SkRegion::kDifference_Op)) {
- ScopedFramebuffer dst_framebuffer(gl_);
- ScopedFramebufferBinder<GL_FRAMEBUFFER> framebuffer_binder(gl_,
- dst_framebuffer);
- gl_->BindTexture(target, texture);
- gl_->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target,
- previous_texture, 0);
- for (SkRegion::Iterator it(region); !it.done(); it.next()) {
- const SkIRect& rect = it.rect();
- gl_->CopyTexSubImage2D(target, 0, rect.x(), rect.y(), rect.x(), rect.y(),
- rect.width(), rect.height());
- }
- gl_->BindTexture(target, 0);
- gl_->Flush();
- }
-}
-
-GLuint GLHelper::CreateTexture() {
- GLuint texture = 0u;
- gl_->GenTextures(1, &texture);
- content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- return texture;
-}
-
-void GLHelper::DeleteTexture(GLuint texture_id) {
- gl_->DeleteTextures(1, &texture_id);
-}
-
-void GLHelper::GenerateSyncToken(gpu::SyncToken* sync_token) {
- const uint64_t fence_sync = gl_->InsertFenceSyncCHROMIUM();
- gl_->ShallowFlushCHROMIUM();
- gl_->GenSyncTokenCHROMIUM(fence_sync, sync_token->GetData());
-}
-
-void GLHelper::WaitSyncToken(const gpu::SyncToken& sync_token) {
- gl_->WaitSyncTokenCHROMIUM(sync_token.GetConstData());
-}
-
-gpu::MailboxHolder GLHelper::ProduceMailboxHolderFromTexture(
- GLuint texture_id) {
- gpu::Mailbox mailbox;
- gl_->GenMailboxCHROMIUM(mailbox.name);
- gl_->ProduceTextureDirectCHROMIUM(texture_id, GL_TEXTURE_2D, mailbox.name);
-
- gpu::SyncToken sync_token;
- GenerateSyncToken(&sync_token);
-
- return gpu::MailboxHolder(mailbox, sync_token, GL_TEXTURE_2D);
-}
-
-GLuint GLHelper::ConsumeMailboxToTexture(const gpu::Mailbox& mailbox,
- const gpu::SyncToken& sync_token) {
- if (mailbox.IsZero())
- return 0;
- if (sync_token.HasData())
- WaitSyncToken(sync_token);
- GLuint texture =
- gl_->CreateAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, mailbox.name);
- return texture;
-}
-
-void GLHelper::ResizeTexture(GLuint texture, const gfx::Size& size) {
- content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->TexImage2D(GL_TEXTURE_2D, 0, GL_RGB, size.width(), size.height(), 0,
- GL_RGB, GL_UNSIGNED_BYTE, NULL);
-}
-
-void GLHelper::CopyTextureSubImage(GLuint texture, const gfx::Rect& rect) {
- content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->CopyTexSubImage2D(GL_TEXTURE_2D, 0, rect.x(), rect.y(), rect.x(),
- rect.y(), rect.width(), rect.height());
-}
-
-void GLHelper::CopyTextureFullImage(GLuint texture, const gfx::Size& size) {
- content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl_, texture);
- gl_->CopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 0, 0, size.width(),
- size.height(), 0);
-}
-
-void GLHelper::Flush() {
- gl_->Flush();
-}
-
-void GLHelper::InsertOrderingBarrier() {
- gl_->OrderingBarrierCHROMIUM();
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackPlane(
- TextureFrameBufferPair* source,
- int row_stride_bytes,
- unsigned char* data,
- int size_shift,
- const gfx::Rect& paste_rect,
- ReadbackSwizzle swizzle,
- const base::Callback<void(bool)>& callback) {
- gl_->BindFramebuffer(GL_FRAMEBUFFER, source->framebuffer());
- const size_t offset = row_stride_bytes * (paste_rect.y() >> size_shift) +
- (paste_rect.x() >> size_shift);
- ReadbackAsync(source->size(), paste_rect.width() >> size_shift,
- row_stride_bytes, data + offset,
- (swizzle == kSwizzleBGRA) ? GL_BGRA_EXT : GL_RGBA,
- GL_UNSIGNED_BYTE, 4, callback);
-}
-
-const float GLHelper::CopyTextureToImpl::kRGBtoYColorWeights[] = {
- 0.257f, 0.504f, 0.098f, 0.0625f};
-const float GLHelper::CopyTextureToImpl::kRGBtoUColorWeights[] = {
- -0.148f, -0.291f, 0.439f, 0.5f};
-const float GLHelper::CopyTextureToImpl::kRGBtoVColorWeights[] = {
- 0.439f, -0.368f, -0.071f, 0.5f};
-const float GLHelper::CopyTextureToImpl::kRGBtoGrayscaleColorWeights[] = {
- 0.213f, 0.715f, 0.072f, 0.0f};
-
-// YUV readback constructors. Initiates the main scaler pipeline and
-// one planar scaler for each of the Y, U and V planes.
-GLHelper::CopyTextureToImpl::ReadbackYUVImpl::ReadbackYUVImpl(
- GLES2Interface* gl,
- CopyTextureToImpl* copy_impl,
- GLHelperScaling* scaler_impl,
- GLHelper::ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- ReadbackSwizzle swizzle)
- : gl_(gl),
- copy_impl_(copy_impl),
- dst_size_(dst_size),
- swizzle_(swizzle),
- scaler_(gl,
- scaler_impl->CreateScaler(quality,
- src_size,
- src_subrect,
- dst_size,
- flip_vertically,
- false)),
- y_(gl,
- scaler_impl->CreatePlanarScaler(
- dst_size,
- gfx::Rect(0, 0, (dst_size.width() + 3) & ~3, dst_size.height()),
- gfx::Size((dst_size.width() + 3) / 4, dst_size.height()),
- false,
- (swizzle == kSwizzleBGRA),
- kRGBtoYColorWeights)),
- u_(gl,
- scaler_impl->CreatePlanarScaler(
- dst_size,
- gfx::Rect(0,
- 0,
- (dst_size.width() + 7) & ~7,
- (dst_size.height() + 1) & ~1),
- gfx::Size((dst_size.width() + 7) / 8, (dst_size.height() + 1) / 2),
- false,
- (swizzle == kSwizzleBGRA),
- kRGBtoUColorWeights)),
- v_(gl,
- scaler_impl->CreatePlanarScaler(
- dst_size,
- gfx::Rect(0,
- 0,
- (dst_size.width() + 7) & ~7,
- (dst_size.height() + 1) & ~1),
- gfx::Size((dst_size.width() + 7) / 8, (dst_size.height() + 1) / 2),
- false,
- (swizzle == kSwizzleBGRA),
- kRGBtoVColorWeights)) {
- DCHECK(!(dst_size.width() & 1));
- DCHECK(!(dst_size.height() & 1));
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackYUVImpl::ReadbackYUV(
- const gpu::Mailbox& mailbox,
- const gpu::SyncToken& sync_token,
- const gfx::Rect& target_visible_rect,
- int y_plane_row_stride_bytes,
- unsigned char* y_plane_data,
- int u_plane_row_stride_bytes,
- unsigned char* u_plane_data,
- int v_plane_row_stride_bytes,
- unsigned char* v_plane_data,
- const gfx::Point& paste_location,
- const base::Callback<void(bool)>& callback) {
- DCHECK(!(paste_location.x() & 1));
- DCHECK(!(paste_location.y() & 1));
-
- GLuint mailbox_texture =
- copy_impl_->ConsumeMailboxToTexture(mailbox, sync_token);
-
- // Scale texture to right size.
- scaler_.Scale(mailbox_texture);
- gl_->DeleteTextures(1, &mailbox_texture);
-
- // Convert the scaled texture in to Y, U and V planes.
- y_.Scale(scaler_.texture());
- u_.Scale(scaler_.texture());
- v_.Scale(scaler_.texture());
-
- const gfx::Rect paste_rect(paste_location, dst_size_);
- if (!target_visible_rect.Contains(paste_rect)) {
- LOG(DFATAL) << "Paste rect not inside VideoFrame's visible rect!";
- callback.Run(false);
- return;
- }
-
- // Read back planes, one at a time. Keep the video frame alive while doing the
- // readback.
- copy_impl_->ReadbackPlane(y_.texture_and_framebuffer(),
- y_plane_row_stride_bytes, y_plane_data, 0,
- paste_rect, swizzle_, base::Bind(&nullcallback));
- copy_impl_->ReadbackPlane(u_.texture_and_framebuffer(),
- u_plane_row_stride_bytes, u_plane_data, 1,
- paste_rect, swizzle_, base::Bind(&nullcallback));
- copy_impl_->ReadbackPlane(v_.texture_and_framebuffer(),
- v_plane_row_stride_bytes, v_plane_data, 1,
- paste_rect, swizzle_, callback);
- gl_->BindFramebuffer(GL_FRAMEBUFFER, 0);
-}
-
-// YUV readback constructors. Initiates the main scaler pipeline and
-// one planar scaler for each of the Y, U and V planes.
-GLHelper::CopyTextureToImpl::ReadbackYUV_MRT::ReadbackYUV_MRT(
- GLES2Interface* gl,
- CopyTextureToImpl* copy_impl,
- GLHelperScaling* scaler_impl,
- GLHelper::ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- ReadbackSwizzle swizzle)
- : gl_(gl),
- copy_impl_(copy_impl),
- dst_size_(dst_size),
- quality_(quality),
- swizzle_(swizzle),
- scaler_(gl,
- scaler_impl->CreateScaler(quality,
- src_size,
- src_subrect,
- dst_size,
- false,
- false)),
- pass1_shader_(scaler_impl->CreateYuvMrtShader(
- dst_size,
- gfx::Rect(0, 0, (dst_size.width() + 3) & ~3, dst_size.height()),
- gfx::Size((dst_size.width() + 3) / 4, dst_size.height()),
- flip_vertically,
- (swizzle == kSwizzleBGRA),
- GLHelperScaling::SHADER_YUV_MRT_PASS1)),
- pass2_shader_(scaler_impl->CreateYuvMrtShader(
- gfx::Size((dst_size.width() + 3) / 4, dst_size.height()),
- gfx::Rect(0, 0, (dst_size.width() + 7) / 8 * 2, dst_size.height()),
- gfx::Size((dst_size.width() + 7) / 8, (dst_size.height() + 1) / 2),
- false,
- (swizzle == kSwizzleBGRA),
- GLHelperScaling::SHADER_YUV_MRT_PASS2)),
- y_(gl, gfx::Size((dst_size.width() + 3) / 4, dst_size.height())),
- uv_(gl),
- u_(gl,
- gfx::Size((dst_size.width() + 7) / 8, (dst_size.height() + 1) / 2)),
- v_(gl,
- gfx::Size((dst_size.width() + 7) / 8, (dst_size.height() + 1) / 2)) {
- DCHECK(!(dst_size.width() & 1));
- DCHECK(!(dst_size.height() & 1));
-
- content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl, uv_);
- gl->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (dst_size.width() + 3) / 4,
- dst_size.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
-}
-
-void GLHelper::CopyTextureToImpl::ReadbackYUV_MRT::ReadbackYUV(
- const gpu::Mailbox& mailbox,
- const gpu::SyncToken& sync_token,
- const gfx::Rect& target_visible_rect,
- int y_plane_row_stride_bytes,
- unsigned char* y_plane_data,
- int u_plane_row_stride_bytes,
- unsigned char* u_plane_data,
- int v_plane_row_stride_bytes,
- unsigned char* v_plane_data,
- const gfx::Point& paste_location,
- const base::Callback<void(bool)>& callback) {
- DCHECK(!(paste_location.x() & 1));
- DCHECK(!(paste_location.y() & 1));
-
- GLuint mailbox_texture =
- copy_impl_->ConsumeMailboxToTexture(mailbox, sync_token);
-
- GLuint texture;
- if (quality_ == GLHelper::SCALER_QUALITY_FAST) {
- // Optimization: SCALER_QUALITY_FAST is just a single bilinear
- // pass, which pass1_shader_ can do just as well, so let's skip
- // the actual scaling in that case.
- texture = mailbox_texture;
- } else {
- // Scale texture to right size.
- scaler_.Scale(mailbox_texture);
- texture = scaler_.texture();
- }
-
- std::vector<GLuint> outputs(2);
- // Convert the scaled texture in to Y, U and V planes.
- outputs[0] = y_.texture();
- outputs[1] = uv_;
- pass1_shader_->Execute(texture, outputs);
-
- gl_->DeleteTextures(1, &mailbox_texture);
-
- outputs[0] = u_.texture();
- outputs[1] = v_.texture();
- pass2_shader_->Execute(uv_, outputs);
-
- const gfx::Rect paste_rect(paste_location, dst_size_);
- if (!target_visible_rect.Contains(paste_rect)) {
- LOG(DFATAL) << "Paste rect not inside VideoFrame's visible rect!";
- callback.Run(false);
- return;
- }
-
- // Read back planes, one at a time.
- copy_impl_->ReadbackPlane(&y_, y_plane_row_stride_bytes, y_plane_data, 0,
- paste_rect, swizzle_, base::Bind(&nullcallback));
- copy_impl_->ReadbackPlane(&u_, u_plane_row_stride_bytes, u_plane_data, 1,
- paste_rect, swizzle_, base::Bind(&nullcallback));
- copy_impl_->ReadbackPlane(&v_, v_plane_row_stride_bytes, v_plane_data, 1,
- paste_rect, swizzle_, callback);
- gl_->BindFramebuffer(GL_FRAMEBUFFER, 0);
-}
-
-bool GLHelper::IsReadbackConfigSupported(SkColorType color_type) {
- DCHECK(readback_support_.get());
- GLenum format, type;
- size_t bytes_per_pixel;
- FormatSupport support = readback_support_->GetReadbackConfig(
- color_type, false, &format, &type, &bytes_per_pixel);
-
- return (support == GLHelperReadbackSupport::SUPPORTED);
-}
-
-ReadbackYUVInterface* GLHelper::CopyTextureToImpl::CreateReadbackPipelineYUV(
- GLHelper::ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- bool use_mrt) {
- helper_->InitScalerImpl();
- // Just query if the best readback configuration needs a swizzle In
- // ReadbackPlane() we will choose GL_RGBA/GL_BGRA_EXT based on swizzle
- GLenum format, type;
- size_t bytes_per_pixel;
- FormatSupport supported = GetReadbackConfig(kRGBA_8888_SkColorType, true,
- &format, &type, &bytes_per_pixel);
- DCHECK((format == GL_RGBA || format == GL_BGRA_EXT) &&
- type == GL_UNSIGNED_BYTE);
-
- ReadbackSwizzle swizzle = kSwizzleNone;
- if (supported == GLHelperReadbackSupport::SWIZZLE)
- swizzle = kSwizzleBGRA;
-
- if (max_draw_buffers_ >= 2 && use_mrt) {
- return new ReadbackYUV_MRT(gl_, this, helper_->scaler_impl_.get(), quality,
- src_size, src_subrect, dst_size, flip_vertically,
- swizzle);
- }
- return new ReadbackYUVImpl(gl_, this, helper_->scaler_impl_.get(), quality,
- src_size, src_subrect, dst_size, flip_vertically,
- swizzle);
-}
-
-ReadbackYUVInterface* GLHelper::CreateReadbackPipelineYUV(
- ScalerQuality quality,
- const gfx::Size& src_size,
- const gfx::Rect& src_subrect,
- const gfx::Size& dst_size,
- bool flip_vertically,
- bool use_mrt) {
- InitCopyTextToImpl();
- return copy_texture_to_impl_->CreateReadbackPipelineYUV(
- quality, src_size, src_subrect, dst_size, flip_vertically, use_mrt);
-}
-
-} // namespace content
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