Re-enable GPU-GPU copies of video textures to GL_RED

media/renderers/skcanvas_video_renderer.cc

 // 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 "media/renderers/skcanvas_video_renderer.h"
 
 #include <GLES3/gl3.h>
 #include <limits>
 
 #include "base/macros.h"
@@ skipping 158 matching lines @@
     gl->TexParameteri(source_textures[i].fTarget, GL_TEXTURE_MIN_FILTER,
                       min_mag_filter[i][0]);
     gl->TexParameteri(source_textures[i].fTarget, GL_TEXTURE_MAG_FILTER,
                       min_mag_filter[i][1]);
 
     gl->DeleteTextures(1, &source_textures[i].fID);
   }
   return img;
 }
 
-bool VideoTextureNeedsClipping(const VideoFrame* video_frame) {
-  // There are multiple reasons that the size of the video frame's
-  // visible rectangle may differ from the coded size, including the
-  // encoder rounding up to the size of a macroblock, or use of
-  // non-square pixels.
-  //
-  // Some callers of these APIs (HTMLVideoElement and the 2D canvas
-  // context) already clip to the video frame's visible rectangle.
-  // WebGL on the other hand assumes that only the valid pixels are
-  // contained in the destination texture. This helper function
-  // determines whether this slower path is needed.
-  return video_frame->visible_rect().size() != video_frame->coded_size();
-}
-
 // Creates a SkImage from a |video_frame| backed by native resources.
 // The SkImage will take ownership of the underlying resource.
 sk_sp<SkImage> NewSkImageFromVideoFrameNative(VideoFrame* video_frame,
                                               const Context3D& context_3d) {
   DCHECK(PIXEL_FORMAT_ARGB == video_frame->format() ||
          PIXEL_FORMAT_XRGB == video_frame->format() ||
          PIXEL_FORMAT_NV12 == video_frame->format() ||
          PIXEL_FORMAT_UYVY == video_frame->format());
 
   const gpu::MailboxHolder& mailbox_holder = video_frame->mailbox_holder(0);
   DCHECK(mailbox_holder.texture_target == GL_TEXTURE_2D ||
          mailbox_holder.texture_target == GL_TEXTURE_RECTANGLE_ARB ||
          mailbox_holder.texture_target == GL_TEXTURE_EXTERNAL_OES)
       << mailbox_holder.texture_target;
 
   gpu::gles2::GLES2Interface* gl = context_3d.gl;
   unsigned source_texture = 0;
   if (mailbox_holder.texture_target != GL_TEXTURE_2D) {
     // TODO(dcastagna): At the moment Skia doesn't support targets different
     // than GL_TEXTURE_2D.  Avoid this copy once
     // https://code.google.com/p/skia/issues/detail?id=3868 is addressed.
     gl->GenTextures(1, &source_texture);
     DCHECK(source_texture);
     gl->BindTexture(GL_TEXTURE_2D, source_texture);
     SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
         gl, video_frame,
-        SkCanvasVideoRenderer::SingleFrameForVideoElementOrCanvas,
         GL_TEXTURE_2D, source_texture, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, 0,
         true, false);
     context_3d.gr_context->resetContext(kTextureBinding_GrGLBackendState);
   } else {
     gl->WaitSyncTokenCHROMIUM(mailbox_holder.sync_token.GetConstData());
     source_texture = gl->CreateAndConsumeTextureCHROMIUM(
         mailbox_holder.texture_target, mailbox_holder.mailbox.name);
   }
   GrGLTextureInfo source_texture_info;
   source_texture_info.fID = source_texture;
@@ skipping 577 matching lines @@
     case PIXEL_FORMAT_Y8:
     case PIXEL_FORMAT_UNKNOWN:
       NOTREACHED() << "Only YUV formats and Y16 are supported.";
   }
 }
 
 // static
 void SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
     gpu::gles2::GLES2Interface* gl,
     VideoFrame* video_frame,
-    SingleFrameCopyMode copy_mode,
     unsigned int target,
     unsigned int texture,
     unsigned int internal_format,
     unsigned int format,
     unsigned int type,
     int level,
     bool premultiply_alpha,
     bool flip_y) {
   DCHECK(video_frame);
   DCHECK(video_frame->HasTextures());
 
   const gpu::MailboxHolder& mailbox_holder = video_frame->mailbox_holder(0);
   DCHECK(mailbox_holder.texture_target == GL_TEXTURE_2D ||
          mailbox_holder.texture_target == GL_TEXTURE_RECTANGLE_ARB ||
          mailbox_holder.texture_target == GL_TEXTURE_EXTERNAL_OES)
       << mailbox_holder.texture_target;
 
   gl->WaitSyncTokenCHROMIUM(mailbox_holder.sync_token.GetConstData());
   uint32_t source_texture = gl->CreateAndConsumeTextureCHROMIUM(
       mailbox_holder.texture_target, mailbox_holder.mailbox.name);
 
   // The video is stored in a unmultiplied format, so premultiply
   // if necessary.
   // Application itself needs to take care of setting the right |flip_y|
   // value down to get the expected result.
   // "flip_y == true" means to reverse the video orientation while
   // "flip_y == false" means to keep the intrinsic orientation.
 
-  if (copy_mode == SingleFrameForVideoElementOrCanvas ||
-      !VideoTextureNeedsClipping(video_frame)) {
-    // No need to clip the source video texture.
-    gl->CopyTextureCHROMIUM(source_texture, 0, target, texture, level,
-                            internal_format, type, flip_y, premultiply_alpha,
-                            false);
-  } else {
-    // Must reallocate the destination texture and copy only a sub-portion.
-    gfx::Rect dest_rect = video_frame->visible_rect();
+  // Must reallocate the destination texture and copy only a sub-portion.
+  gfx::Rect dest_rect = video_frame->visible_rect();
 #if DCHECK_IS_ON()
-    // The caller should have bound _texture_ to the GL_TEXTURE_2D
-    // binding point already.
-    GLuint current_texture = 0;
-    gl->GetIntegerv(GL_TEXTURE_BINDING_2D,
-                    reinterpret_cast<GLint*>(&current_texture));
-    DCHECK_EQ(current_texture, texture);
-    // There should always be enough data in the source texture to
-    // cover this copy.
-    DCHECK_LE(dest_rect.width(), video_frame->coded_size().width());
-    DCHECK_LE(dest_rect.height(), video_frame->coded_size().height());
+  // There should always be enough data in the source texture to
+  // cover this copy.
+  DCHECK_LE(dest_rect.width(), video_frame->coded_size().width());
+  DCHECK_LE(dest_rect.height(), video_frame->coded_size().height());
 #endif
-    gl->TexImage2D(target, level, internal_format, dest_rect.width(),
-                   dest_rect.height(), 0, format, type, nullptr);
-    gl->CopySubTextureCHROMIUM(source_texture, 0, target, texture, level, 0, 0,
-                               dest_rect.x(), dest_rect.y(), dest_rect.width(),
-                               dest_rect.height(), flip_y, premultiply_alpha,
-                               false);
-  }
+  gl->TexImage2D(target, level, internal_format, dest_rect.width(),
+                 dest_rect.height(), 0, format, type, nullptr);
+  gl->CopySubTextureCHROMIUM(source_texture, 0, target, texture, level, 0, 0,
+                             dest_rect.x(), dest_rect.y(), dest_rect.width(),
+                             dest_rect.height(), flip_y, premultiply_alpha,
+                             false);
 
   gl->DeleteTextures(1, &source_texture);
   gl->Flush();
 
   SyncTokenClientImpl client(gl);
   video_frame->UpdateReleaseSyncToken(&client);
 }
 
 bool SkCanvasVideoRenderer::CopyVideoFrameTexturesToGLTexture(
     const Context3D& context_3d,
@@ skipping 34 matching lines @@
     canvas_gl->ShallowFlushCHROMIUM();
     canvas_gl->GenSyncTokenCHROMIUM(fence_sync,
                                     mailbox_holder.sync_token.GetData());
 
     destination_gl->WaitSyncTokenCHROMIUM(
         mailbox_holder.sync_token.GetConstData());
     uint32_t intermediate_texture =
         destination_gl->CreateAndConsumeTextureCHROMIUM(
             mailbox_holder.texture_target, mailbox_holder.mailbox.name);
 
-    // See whether the source video texture must be clipped.
-    if (VideoTextureNeedsClipping(video_frame.get())) {
-      // Reallocate destination texture and copy only valid region.
-      gfx::Rect dest_rect = video_frame->visible_rect();
+    // Reallocate destination texture and copy only valid region.
+    gfx::Rect dest_rect = video_frame->visible_rect();
 #if DCHECK_IS_ON()
-      // The caller should have bound _texture_ to the GL_TEXTURE_2D
-      // binding point already.
-      GLuint current_texture = 0;
-      destination_gl->GetIntegerv(GL_TEXTURE_BINDING_2D,
-                                  reinterpret_cast<GLint*>(&current_texture));
-      DCHECK_EQ(current_texture, texture);
-      // There should always be enough data in the source texture to
-      // cover this copy.
-      DCHECK_LE(dest_rect.width(), video_frame->coded_size().width());
-      DCHECK_LE(dest_rect.height(), video_frame->coded_size().height());
+    // There should always be enough data in the source texture to
+    // cover this copy.
+    DCHECK_LE(dest_rect.width(), video_frame->coded_size().width());
+    DCHECK_LE(dest_rect.height(), video_frame->coded_size().height());
 #endif
-      destination_gl->TexImage2D(target, level, internal_format,
-                                 dest_rect.width(), dest_rect.height(), 0,
-                                 format, type, nullptr);
-      destination_gl->CopySubTextureCHROMIUM(
-          intermediate_texture, 0, target, texture, level, 0, 0, dest_rect.x(),
-          dest_rect.y(), dest_rect.width(), dest_rect.height(), flip_y,
-          premultiply_alpha, false);
-    } else {
-      destination_gl->CopyTextureCHROMIUM(intermediate_texture, 0, target,
-                                          texture, level, internal_format, type,
-                                          flip_y, premultiply_alpha, false);
-    }
+    destination_gl->TexImage2D(target, level, internal_format,
+                               dest_rect.width(), dest_rect.height(), 0, format,
+                               type, nullptr);
+    destination_gl->CopySubTextureCHROMIUM(
+        intermediate_texture, 0, target, texture, level, 0, 0, dest_rect.x(),
+        dest_rect.y(), dest_rect.width(), dest_rect.height(), flip_y,
+        premultiply_alpha, false);
 
     destination_gl->DeleteTextures(1, &intermediate_texture);
 
     // Wait for destination context to consume mailbox before deleting it in
     // canvas context.
     const GLuint64 dest_fence_sync = destination_gl->InsertFenceSyncCHROMIUM();
     destination_gl->ShallowFlushCHROMIUM();
     gpu::SyncToken dest_sync_token;
     destination_gl->GenSyncTokenCHROMIUM(dest_fence_sync,
                                          dest_sync_token.GetData());
     canvas_gl->WaitSyncTokenCHROMIUM(dest_sync_token.GetConstData());
 
     SyncTokenClientImpl client(canvas_gl);
     video_frame->UpdateReleaseSyncToken(&client);
   } else {
     CopyVideoFrameSingleTextureToGLTexture(
-        destination_gl, video_frame.get(), SingleFrameForWebGL, target, texture,
-        internal_format, format, type, level, premultiply_alpha, flip_y);
+        destination_gl, video_frame.get(), target, texture, internal_format,
+        format, type, level, premultiply_alpha, flip_y);
   }
 
   return true;
 }
 
 bool SkCanvasVideoRenderer::TexImage2D(
     unsigned target,
     unsigned texture,
     gpu::gles2::GLES2Interface* gl,
     const gpu::Capabilities& gpu_capabilities,
@@ skipping 114 matching lines @@
       last_image_->bounds().contains(visible_rect)) {
     last_image_ = last_image_->makeSubset(visible_rect);
   }
 }
 
 SkISize SkCanvasVideoRenderer::LastImageDimensionsForTesting() {
   return last_image_dimensions_for_testing_;
 }
 
 }  // namespace media