Add compositor support for half-float RGBA buffers and textures

gpu/command_buffer/service/feature_info.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 "gpu/command_buffer/service/feature_info.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
@@ skipping 90 matching lines @@
       glBindBuffer(GL_PIXEL_UNPACK_BUFFER, static_cast<GLuint>(orig_binding_));
     }
   }
 
  private:
     GLint orig_binding_;
 };
 
 }  // anonymous namespace.
 
-FeatureInfo::FeatureFlags::FeatureFlags()
-    : chromium_framebuffer_multisample(false),
-      chromium_sync_query(false),
-      use_core_framebuffer_multisample(false),
-      multisampled_render_to_texture(false),
-      use_img_for_multisampled_render_to_texture(false),
-      chromium_screen_space_antialiasing(false),
-      use_chromium_screen_space_antialiasing_via_shaders(false),
-      oes_standard_derivatives(false),
-      oes_egl_image_external(false),
-      nv_egl_stream_consumer_external(false),
-      oes_depth24(false),
-      oes_compressed_etc1_rgb8_texture(false),
-      packed_depth24_stencil8(false),
-      npot_ok(false),
-      enable_texture_float_linear(false),
-      enable_texture_half_float_linear(false),
-      angle_translated_shader_source(false),
-      angle_pack_reverse_row_order(false),
-      arb_texture_rectangle(false),
-      angle_instanced_arrays(false),
-      occlusion_query(false),
-      occlusion_query_boolean(false),
-      use_arb_occlusion_query2_for_occlusion_query_boolean(false),
-      use_arb_occlusion_query_for_occlusion_query_boolean(false),
-      native_vertex_array_object(false),
-      ext_texture_format_astc(false),
-      ext_texture_format_atc(false),
-      ext_texture_format_bgra8888(false),
-      ext_texture_format_dxt1(false),
-      ext_texture_format_dxt5(false),
-      enable_shader_name_hashing(false),
-      enable_samplers(false),
-      ext_draw_buffers(false),
-      nv_draw_buffers(false),
-      ext_frag_depth(false),
-      ext_shader_texture_lod(false),
-      use_async_readpixels(false),
-      map_buffer_range(false),
-      ext_discard_framebuffer(false),
-      angle_depth_texture(false),
-      is_swiftshader(false),
-      angle_texture_usage(false),
-      ext_texture_storage(false),
-      chromium_path_rendering(false),
-      chromium_framebuffer_mixed_samples(false),
-      blend_equation_advanced(false),
-      blend_equation_advanced_coherent(false),
-      ext_texture_rg(false),
-      chromium_image_ycbcr_420v(false),
-      chromium_image_ycbcr_422(false),
-      emulate_primitive_restart_fixed_index(false),
-      ext_render_buffer_format_bgra8888(false),
-      ext_multisample_compatibility(false),
-      ext_blend_func_extended(false),
-      ext_read_format_bgra(false),
-      desktop_srgb_support(false),
-      arb_es3_compatibility(false) {}
+FeatureInfo::FeatureFlags::FeatureFlags() {}
 
 FeatureInfo::FeatureInfo() {
   InitializeBasicState(base::CommandLine::InitializedForCurrentProcess()
                            ? base::CommandLine::ForCurrentProcess()
                            : nullptr);
 }
 
 FeatureInfo::FeatureInfo(
     const GpuDriverBugWorkarounds& gpu_driver_bug_workarounds)
     : workarounds_(gpu_driver_bug_workarounds) {
@@ skipping 103 matching lines @@
   validators_.texture_sized_color_renderable_internal_format.AddValue(GL_R16F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(GL_RG16F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(
       GL_RGBA16F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(GL_R32F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(GL_RG32F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(
       GL_RGBA32F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(
       GL_R11F_G11F_B10F);
+  feature_flags_.enable_color_buffer_float = true;
 }
 
 void FeatureInfo::EnableCHROMIUMColorBufferFloatRGBA() {
   if (!feature_flags_.chromium_color_buffer_float_rgba)
     return;
   validators_.texture_internal_format.AddValue(GL_RGBA32F);
   validators_.texture_sized_color_renderable_internal_format.AddValue(
       GL_RGBA32F);
   AddExtensionString("GL_CHROMIUM_color_buffer_float_rgba");
 }
@@ skipping 1290 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu