cc: Cache highp_threshold in TexCoordPrecisionRequired

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 <set>
 #include <string>
 #include <vector>
@@ skipping 97 matching lines @@
       shared_geometry_quad_(gfx::RectF(-0.5f, -0.5f, 1.0f, 1.0f)),
       output_surface_(output_surface),
       context_(output_surface->context3d()),
       is_viewport_changed_(false),
       is_backbuffer_discarded_(false),
       discard_backbuffer_when_not_visible_(false),
       is_using_bind_uniform_(false),
       visible_(true),
       is_scissor_enabled_(false),
       highp_threshold_min_(highp_threshold_min),
+      highp_threshold_cache_(0),
       on_demand_tile_raster_resource_id_(0) {
   DCHECK(context_);
 }
 
 bool GLRenderer::Initialize() {
   if (!context_->makeContextCurrent())
     return false;
 
   context_->pushGroupMarkerEXT("CompositorContext");
 
@@ skipping 616 matching lines @@
     Context()->bindTexture(GL_TEXTURE_2D, texture->getTextureHandle());
   } else {
     contents_resource_lock = make_scoped_ptr(
         new ResourceProvider::ScopedSamplerGL(resource_provider_,
                                               contents_texture->id(),
                                               GL_TEXTURE_2D,
                                               GL_LINEAR));
   }
 
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_,
+      context_, &highp_threshold_cache_, highp_threshold_min_,
       quad->shared_quad_state->visible_content_rect.bottom_right());
 
   int shader_quad_location = -1;
   int shader_edge_location = -1;
   int shader_mask_sampler_location = -1;
   int shader_mask_tex_coord_scale_location = -1;
   int shader_mask_tex_coord_offset_location = -1;
   int shader_matrix_location = -1;
   int shader_alpha_location = -1;
   int shader_color_matrix_location = -1;
@@ skipping 454 matching lines @@
   clamp_tex_rect.Inset(tex_clamp_x, tex_clamp_y, tex_clamp_x, tex_clamp_y);
 
   // Map clamping rectangle to unit square.
   float vertex_tex_translate_x = -clamp_geom_rect.x() / clamp_geom_rect.width();
   float vertex_tex_translate_y =
       -clamp_geom_rect.y() / clamp_geom_rect.height();
   float vertex_tex_scale_x = tile_rect.width() / clamp_geom_rect.width();
   float vertex_tex_scale_y = tile_rect.height() / clamp_geom_rect.height();
 
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_, quad->texture_size);
+      context_, &highp_threshold_cache_, highp_threshold_min_,
+      quad->texture_size);
 
   // Map to normalized texture coordinates.
   gfx::Size texture_size = quad->texture_size;
   float fragment_tex_translate_x = clamp_tex_rect.x() / texture_size.width();
   float fragment_tex_translate_y = clamp_tex_rect.y() / texture_size.height();
   float fragment_tex_scale_x = clamp_tex_rect.width() / texture_size.width();
   float fragment_tex_scale_y = clamp_tex_rect.height() / texture_size.height();
 
   gfx::Transform device_transform =
       frame->window_matrix * frame->projection_matrix * quad->quadTransform();
@@ skipping 97 matching lines @@
       tile_rect.size());
   DrawQuadGeometry(
       frame, quad->quadTransform(), centered_rect, uniforms.matrix_location);
 }
 
 void GLRenderer::DrawYUVVideoQuad(const DrawingFrame* frame,
                                   const YUVVideoDrawQuad* quad) {
   SetBlendEnabled(quad->ShouldDrawWithBlending());
 
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_,
+      context_, &highp_threshold_cache_, highp_threshold_min_,
       quad->shared_quad_state->visible_content_rect.bottom_right());
 
   const VideoYUVProgram* program = GetVideoYUVProgram(tex_coord_precision);
   DCHECK(program && (program->initialized() || IsContextLost()));
 
   GLC(Context(), Context()->activeTexture(GL_TEXTURE1));
   ResourceProvider::ScopedSamplerGL y_plane_lock(
       resource_provider_, quad->y_plane_resource_id, GL_TEXTURE_2D, GL_LINEAR);
   GLC(Context(), Context()->activeTexture(GL_TEXTURE2));
   ResourceProvider::ScopedSamplerGL u_plane_lock(
@@ skipping 51 matching lines @@
 
 void GLRenderer::DrawStreamVideoQuad(const DrawingFrame* frame,
                                      const StreamVideoDrawQuad* quad) {
   SetBlendEnabled(quad->ShouldDrawWithBlending());
 
   static float gl_matrix[16];
 
   DCHECK(capabilities_.using_egl_image);
 
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_,
+      context_, &highp_threshold_cache_, highp_threshold_min_,
       quad->shared_quad_state->visible_content_rect.bottom_right());
 
   const VideoStreamTextureProgram* program =
       GetVideoStreamTextureProgram(tex_coord_precision);
   SetUseProgram(program->program());
 
   ToGLMatrix(&gl_matrix[0], quad->matrix);
   GLC(Context(),
       Context()->uniformMatrix4fv(
           program->vertex_shader().tex_matrix_location(), 1, false, gl_matrix));
@@ skipping 153 matching lines @@
   // Clear the cache.
   draw_cache_.program_id = 0;
   draw_cache_.uv_xform_data.resize(0);
   draw_cache_.vertex_opacity_data.resize(0);
   draw_cache_.matrix_data.resize(0);
 }
 
 void GLRenderer::EnqueueTextureQuad(const DrawingFrame* frame,
                                     const TextureDrawQuad* quad) {
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_,
+      context_, &highp_threshold_cache_, highp_threshold_min_,
       quad->shared_quad_state->visible_content_rect.bottom_right());
 
   // Choose the correct texture program binding
   TexTransformTextureProgramBinding binding;
   if (quad->flipped)
     binding.Set(GetTextureProgramFlip(tex_coord_precision), Context());
   else
     binding.Set(GetTextureProgram(tex_coord_precision), Context());
 
   int resource_id = quad->resource_id;
@@ skipping 34 matching lines @@
   quad_rect_matrix = frame->projection_matrix * quad_rect_matrix;
 
   Float16 m;
   quad_rect_matrix.matrix().asColMajorf(m.data);
   draw_cache_.matrix_data.push_back(m);
 }
 
 void GLRenderer::DrawTextureQuad(const DrawingFrame* frame,
                                  const TextureDrawQuad* quad) {
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_,
+      context_, &highp_threshold_cache_, highp_threshold_min_,
       quad->shared_quad_state->visible_content_rect.bottom_right());
 
   TexTransformTextureProgramBinding binding;
   if (quad->flipped)
     binding.Set(GetTextureProgramFlip(tex_coord_precision), Context());
   else
     binding.Set(GetTextureProgram(tex_coord_precision), Context());
   SetUseProgram(binding.program_id);
   GLC(Context(), Context()->uniform1i(binding.sampler_location, 0));
   gfx::PointF uv0 = quad->uv_top_left;
@@ skipping 33 matching lines @@
 
   if (!quad->premultiplied_alpha)
     GLC(context_, context_->blendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA));
 }
 
 void GLRenderer::DrawIOSurfaceQuad(const DrawingFrame* frame,
                                    const IOSurfaceDrawQuad* quad) {
   SetBlendEnabled(quad->ShouldDrawWithBlending());
 
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_,
+      context_,  &highp_threshold_cache_, highp_threshold_min_,
       quad->shared_quad_state->visible_content_rect.bottom_right());
 
   TexTransformTextureProgramBinding binding;
   binding.Set(GetTextureIOSurfaceProgram(tex_coord_precision), Context());
 
   SetUseProgram(binding.program_id);
   GLC(Context(), Context()->uniform1i(binding.sampler_location, 0));
   if (quad->orientation == IOSurfaceDrawQuad::FLIPPED) {
     GLC(Context(),
         Context()->uniform4f(binding.tex_transform_location,
@@ skipping 132 matching lines @@
       context_->uniformMatrix4fv(matrix_location, 1, false, &gl_matrix[0]));
 
   GLC(context_, context_->drawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0));
 }
 
 void GLRenderer::CopyTextureToFramebuffer(const DrawingFrame* frame,
                                           int texture_id,
                                           gfx::Rect rect,
                                           const gfx::Transform& draw_matrix) {
   TexCoordPrecision tex_coord_precision = TexCoordPrecisionRequired(
-      context_, highp_threshold_min_, rect.bottom_right());
+      context_, &highp_threshold_cache_, highp_threshold_min_,
+      rect.bottom_right());
   const RenderPassProgram* program = GetRenderPassProgram(tex_coord_precision);
 
   GLC(Context(), Context()->bindTexture(GL_TEXTURE_2D, texture_id));
 
   SetUseProgram(program->program());
   GLC(Context(),
       Context()->uniform1i(program->fragment_shader().sampler_location(), 0));
   GLC(Context(),
       Context()->uniform4f(program->vertex_shader().tex_transform_location(),
                            0.0f,
@@ skipping 769 matching lines @@
     resource_provider_->DeleteResource(on_demand_tile_raster_resource_id_);
 
   ReleaseRenderPassTextures();
 }
 
 bool GLRenderer::IsContextLost() {
   return (context_->getGraphicsResetStatusARB() != GL_NO_ERROR);
 }
 
 }  // namespace cc