cc: Refactor ResourceProvider.

cc/output/gl_renderer.cc

 // Copyright 2010 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 "cc/output/gl_renderer.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <string>
@@ skipping 163 matching lines @@
 // Smallest unit that impact anti-aliasing output. We use this to
 // determine when anti-aliasing is unnecessary.
 const float kAntiAliasingEpsilon = 1.0f / 1024.0f;
 
 // Block or crash if the number of pending sync queries reach this high as
 // something is seriously wrong on the service side if this happens.
 const size_t kMaxPendingSyncQueries = 16;
 
 }  // anonymous namespace
 
+static GLint GetActiveTextureUnit(GLES2Interface* gl) {
+  GLint active_unit = 0;
+  gl->GetIntegerv(GL_ACTIVE_TEXTURE, &active_unit);
+  return active_unit;
+}
+
 class GLRenderer::ScopedUseGrContext {
  public:
   static scoped_ptr<ScopedUseGrContext> Create(GLRenderer* renderer,
                                                DrawingFrame* frame) {
     if (!renderer->output_surface_->context_provider()->GrContext())
       return scoped_ptr<ScopedUseGrContext>();
     return make_scoped_ptr(new ScopedUseGrContext(renderer, frame));
   }
 
   ~ScopedUseGrContext() { PassControlToGLRenderer(); }
@@ skipping 865 matching lines @@
     mask_texture_id = mask_resource_lock->texture_id();
   }
 
   // TODO(danakj): use the background_texture and blend the background in with
   // this draw instead of having a separate copy of the background texture.
 
   scoped_ptr<ResourceProvider::ScopedSamplerGL> contents_resource_lock;
   if (filter_bitmap.getTexture()) {
     GrTexture* texture =
         reinterpret_cast<GrTexture*>(filter_bitmap.getTexture());
-    DCHECK_EQ(GL_TEXTURE0, ResourceProvider::GetActiveTextureUnit(gl_));
+    DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
     gl_->BindTexture(GL_TEXTURE_2D, texture->getTextureHandle());
   } else {
     contents_resource_lock =
         make_scoped_ptr(new ResourceProvider::ScopedSamplerGL(
             resource_provider_, contents_texture->id(), GL_LINEAR));
     DCHECK_EQ(static_cast<GLenum>(GL_TEXTURE_2D),
               contents_resource_lock->target());
   }
 
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
@@ skipping 767 matching lines @@
       GetVideoStreamTextureProgram(tex_coord_precision);
   SetUseProgram(program->program());
 
   ToGLMatrix(&gl_matrix[0], quad->matrix);
   GLC(gl_,
       gl_->UniformMatrix4fv(
           program->vertex_shader().tex_matrix_location(), 1, false, gl_matrix));
 
   ResourceProvider::ScopedReadLockGL lock(resource_provider_,
                                           quad->resource_id);
-  DCHECK_EQ(GL_TEXTURE0, ResourceProvider::GetActiveTextureUnit(gl_));
+  DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
   GLC(gl_, gl_->BindTexture(GL_TEXTURE_EXTERNAL_OES, lock.texture_id()));
 
   GLC(gl_, gl_->Uniform1i(program->fragment_shader().sampler_location(), 0));
 
   SetShaderOpacity(quad->opacity(),
                    program->fragment_shader().alpha_location());
   DrawQuadGeometry(frame,
                    quad->quadTransform(),
                    quad->rect,
                    program->vertex_shader().matrix_location());
@@ skipping 89 matching lines @@
 
   // Bind the program to the GL state.
   SetUseProgram(draw_cache_.program_id);
 
   // Bind the correct texture sampler location.
   GLC(gl_, gl_->Uniform1i(draw_cache_.sampler_location, 0));
 
   // Assume the current active textures is 0.
   ResourceProvider::ScopedReadLockGL locked_quad(resource_provider_,
                                                  draw_cache_.resource_id);
-  DCHECK_EQ(GL_TEXTURE0, ResourceProvider::GetActiveTextureUnit(gl_));
+  DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
   GLC(gl_, gl_->BindTexture(GL_TEXTURE_2D, locked_quad.texture_id()));
 
   COMPILE_ASSERT(sizeof(Float4) == 4 * sizeof(float), struct_is_densely_packed);
   COMPILE_ASSERT(sizeof(Float16) == 16 * sizeof(float),
                  struct_is_densely_packed);
 
   // Upload the tranforms for both points and uvs.
   GLC(gl_,
       gl_->UniformMatrix4fv(
           static_cast<int>(draw_cache_.matrix_location),
@@ skipping 128 matching lines @@
                        quad->io_surface_size.width(),
                        quad->io_surface_size.height()));
   }
 
   const float vertex_opacity[] = {quad->opacity(), quad->opacity(),
                                   quad->opacity(), quad->opacity()};
   GLC(gl_, gl_->Uniform1fv(binding.vertex_opacity_location, 4, vertex_opacity));
 
   ResourceProvider::ScopedReadLockGL lock(resource_provider_,
                                           quad->io_surface_resource_id);
-  DCHECK_EQ(GL_TEXTURE0, ResourceProvider::GetActiveTextureUnit(gl_));
+  DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
   GLC(gl_, gl_->BindTexture(GL_TEXTURE_RECTANGLE_ARB, lock.texture_id()));
 
   DrawQuadGeometry(
       frame, quad->quadTransform(), quad->rect, binding.matrix_location);
 
   GLC(gl_, gl_->BindTexture(GL_TEXTURE_RECTANGLE_ARB, 0));
 }
 
 void GLRenderer::FinishDrawingFrame(DrawingFrame* frame) {
   if (use_sync_query_) {
@@ skipping 132 matching lines @@
   } else {
     GLC(gl_,
         gl_->Uniform4f(program->vertex_shader().tex_transform_location(),
                        0.f,
                        0.f,
                        1.f,
                        1.f));
   }
 
   SetShaderOpacity(1.f, program->fragment_shader().alpha_location());
-  DCHECK_EQ(GL_TEXTURE0, ResourceProvider::GetActiveTextureUnit(gl_));
+  DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
   GLC(gl_, gl_->BindTexture(GL_TEXTURE_2D, texture_id));
   DrawQuadGeometry(
       frame, draw_matrix, rect, program->vertex_shader().matrix_location());
 }
 
 void GLRenderer::Finish() {
   TRACE_EVENT0("cc", "GLRenderer::Finish");
   GLC(gl_, gl_->Finish());
 }
 
@@ skipping 885 matching lines @@
     context_support_->ScheduleOverlayPlane(
         overlay.plane_z_order,
         overlay.transform,
         pending_overlay_resources_.back()->texture_id(),
         overlay.display_rect,
         overlay.uv_rect);
   }
 }
 
 }  // namespace cc