Fix the size of video textures uploaded to WebGL.

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 166 matching lines @@
 
   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);
+    const gfx::Size& natural_size = video_frame->natural_size();
+    gl->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, natural_size.width(),
+                   natural_size.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE,
+                   nullptr);
     SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
-        gl, video_frame, source_texture, GL_RGBA, GL_UNSIGNED_BYTE, true,
-        false);
+        gl, video_frame, source_texture, true, false);
   } else {
     gl->WaitSyncTokenCHROMIUM(mailbox_holder.sync_token.GetConstData());
     source_texture = gl->CreateAndConsumeTextureCHROMIUM(
         mailbox_holder.texture_target, mailbox_holder.mailbox.name);
   }
   GrBackendTextureDesc desc;
   desc.fFlags = kRenderTarget_GrBackendTextureFlag;
   desc.fOrigin = kTopLeft_GrSurfaceOrigin;
   desc.fWidth = video_frame->coded_size().width();
   desc.fHeight = video_frame->coded_size().height();
@@ skipping 543 matching lines @@
     case PIXEL_FORMAT_UNKNOWN:
       NOTREACHED() << "Only YUV formats and Y16 are supported.";
   }
 }
 
 // static
 void SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
     gpu::gles2::GLES2Interface* gl,
     VideoFrame* video_frame,
     unsigned int texture,
-    unsigned int internal_format,
-    unsigned int type,
     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.
-  gl->CopyTextureCHROMIUM(source_texture, texture, internal_format, type,
-                          flip_y, premultiply_alpha, false);
+
+  // The video's texture might be larger than the natural size because
+  // the encoder might have had to round up to the size of a macroblock.
+  // Make sure to only copy the natural size to avoid putting garbage
+  // into the bottom of the destination texture.
+  const gfx::Size& natural_size = video_frame->natural_size();
+  gl->CopySubTextureCHROMIUM(source_texture, texture, 0, 0, 0, 0,
+                             natural_size.width(), natural_size.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,
     gpu::gles2::GLES2Interface* destination_gl,
     const scoped_refptr<VideoFrame>& video_frame,
     unsigned int texture,
-    unsigned int internal_format,
-    unsigned int type,
     bool premultiply_alpha,
     bool flip_y) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(video_frame);
   DCHECK(video_frame->HasTextures());
   if (media::VideoFrame::NumPlanes(video_frame->format()) > 1) {
     if (!context_3d.gr_context)
       return false;
     if (!UpdateLastImage(video_frame, context_3d))
       return false;
@@ skipping 16 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);
 
-    destination_gl->CopyTextureCHROMIUM(intermediate_texture, texture,
-                                        internal_format, type, flip_y,
-                                        premultiply_alpha, false);
+    // The video's texture might be larger than the natural size because
+    // the encoder might have had to round up to the size of a macroblock.
+    // Make sure to only copy the natural size to avoid putting garbage
+    // into the bottom of the destination texture.
+    gfx::Size natural_size = video_frame->natural_size();

[DaleCurtis, 2016/12/12 19:12:23]

const& for consistency?

[Ken Russell (switch to Gerrit), 2016/12/20 04:45:33]

Yes, thanks. Done.

+    destination_gl->CopySubTextureCHROMIUM(
+        intermediate_texture, texture, 0, 0, 0, 0, natural_size.width(),
+        natural_size.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(),
-                                           texture, internal_format, type,
-                                           premultiply_alpha, flip_y);
+                                           texture, premultiply_alpha, flip_y);
   }
 
   return true;
 }
 
 bool SkCanvasVideoRenderer::TexImage2D(unsigned target,
                                        gpu::gles2::GLES2Interface* gl,
                                        VideoFrame* frame,
                                        int level,
                                        int internalformat,
@@ skipping 87 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