16 bpp video stream capture, render and WebGL usage - Realsense R200 & SR300 support.

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 6803b2ac1ee9500e5316efc39b93c19b9d2c73cd..d0835d1dbae5426873c7a17da4f81e01c39cf8a4 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -545,6 +545,9 @@ void GLRenderer::DoDrawQuad(DrawingFrame* frame,
       DrawYUVVideoQuad(frame, YUVVideoDrawQuad::MaterialCast(quad),
                        clip_region);
       break;
+    case DrawQuad::Y_VIDEO_CONTENT:
+      DrawYVideoQuad(frame, YVideoDrawQuad::MaterialCast(quad), clip_region);
+      break;
   }
 }
 
@@ -2323,6 +2326,64 @@ void GLRenderer::DrawYUVVideoQuad(const DrawingFrame* frame,
   }
 }
 
+void GLRenderer::DrawYVideoQuad(const DrawingFrame* frame,
+                                const YVideoDrawQuad* quad,
+                                const gfx::QuadF* clip_region) {
+  SetBlendEnabled(quad->ShouldDrawWithBlending());
+  TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
+      gl_, &highp_threshold_cache_, highp_threshold_min_,
+      quad->shared_quad_state->visible_quad_layer_rect.bottom_right());
+
+  ResourceProvider::ScopedSamplerGL lock(resource_provider_,
+                                                quad->resource_id(),
+                                                GL_NEAREST);
+  const SamplerType sampler = SamplerTypeFromTextureTarget(lock.target());
+  DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
+  gl_->BindTexture(lock.target(), lock.texture_id());
+
+  // TODO(astojilj) TextureProgram could also be used - just remember to set
+  // varying v_alpha.
+  const VideoYProgram* program =
+       GetVideoYProgram(tex_coord_precision, sampler);
+  DCHECK(program && (program->initialized() || IsContextLost()));
+  SetUseProgram(program->program());
+
+  // Set the uv-transform.
+  Float4 uv_transform = {{0.0f, 0.0f, 1.0f, 1.0f}};
+  if (!clip_region) {
+    gfx::PointF uv0 = quad->uv_top_left;
+    gfx::PointF uv1 = quad->uv_bottom_right;
+    uv_transform = { { uv0.x(), uv0.y(), uv1.x() - uv0.x(), uv1.y() - uv0.y() } };
+  }
+  if (sampler == SAMPLER_TYPE_2D_RECT) {
+    // Un-normalize the texture coordiantes for rectangle targets.
+    gfx::Size texture_size = lock.texture_size();
+    uv_transform.data[0] *= texture_size.width();
+    uv_transform.data[2] *= texture_size.width();
+    uv_transform.data[1] *= texture_size.height();
+    uv_transform.data[3] *= texture_size.height();
+  }
+  gl_->Uniform4fv(program->vertex_shader().tex_transform_location(), 1,
+                  uv_transform.data);
+  gl_->Uniform1i(program->fragment_shader().sampler_location(), 0);
+
+  if (!clip_region) {
+    DrawQuadGeometry(frame, quad->shared_quad_state->quad_to_target_transform,
+                     gfx::RectF(quad->rect),
+                     program->vertex_shader().matrix_location());
+  } else {
+    gfx::QuadF region_quad(*clip_region);
+    region_quad.Scale(1.0f / quad->rect.width(), 1.0f / quad->rect.height());
+    region_quad -= gfx::Vector2dF(0.5f, 0.5f);
+    float uvs[8] = {0};
+    GetScaledUVs(quad->visible_rect, clip_region, uvs);
+    DrawQuadGeometryClippedByQuadF(
+        frame, quad->shared_quad_state->quad_to_target_transform,
+        gfx::RectF(quad->rect), region_quad,
+        program->vertex_shader().matrix_location(), uvs);
+  }
+}
+
 void GLRenderer::DrawStreamVideoQuad(const DrawingFrame* frame,
                                      const StreamVideoDrawQuad* quad,
                                      const gfx::QuadF* clip_region) {
@@ -3555,6 +3616,22 @@ const GLRenderer::VideoYUVAProgram* GLRenderer::GetVideoYUVAProgram(
   return program;
 }
 
+const GLRenderer::VideoYProgram* GLRenderer::GetVideoYProgram(
+    TexCoordPrecision precision,
+    SamplerType sampler) {
+  DCHECK_GE(precision, 0);
+  DCHECK_LE(precision, LAST_TEX_COORD_PRECISION);
+  DCHECK_GE(sampler, 0);
+  DCHECK_LE(sampler, LAST_SAMPLER_TYPE);
+  VideoYProgram* program = &video_y_program_[precision][sampler];
+  if (!program->initialized()) {
+    TRACE_EVENT0("cc", "GLRenderer::videoYProgram::initialize");
+    program->Initialize(output_surface_->context_provider(), precision,
+                        sampler);
+  }
+  return program;
+}
+
 const GLRenderer::VideoStreamTextureProgram*
 GLRenderer::GetVideoStreamTextureProgram(TexCoordPrecision precision) {
   DCHECK_GE(precision, 0);
@@ -3606,6 +3683,7 @@ void GLRenderer::CleanupSharedObjects() {
       nonpremultiplied_texture_program_[i][j].Cleanup(gl_);
       texture_background_program_[i][j].Cleanup(gl_);
       nonpremultiplied_texture_background_program_[i][j].Cleanup(gl_);
+      video_y_program_[i][j].Cleanup(gl_);
     }
 
     video_stream_texture_program_[i].Cleanup(gl_);