Handle GPU command buffer client side Get* caching.

gpu/command_buffer/client/gles2_implementation.cc

Index: gpu/command_buffer/client/gles2_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index 1327826e22ad1a0380d6ba0c2a02087ebf870ac1..766f5226a2c39f4eedb322f9a987bc9e80e5db9a 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -614,7 +614,22 @@ bool GLES2Implementation::GetHelper(GLenum pname, GLint* params) {
   // are invalid. It is not a problem for now, but once we allow resource
   // sharing in WebGL, we need to implement a mechanism to allow correct
   // client side binding points tracking.  crbug.com/465562.
+
+  // ES2 parameters.
   switch (pname) {
+    case GL_ACTIVE_TEXTURE:
+      *params = active_texture_unit_ + GL_TEXTURE0;
+      return true;
+    case GL_ARRAY_BUFFER_BINDING:
+      *params = bound_array_buffer_id_;
+      return true;
+    case GL_ELEMENT_ARRAY_BUFFER_BINDING:
+      *params =
+          vertex_array_object_manager_->bound_element_array_buffer();
+      return true;
+    case GL_FRAMEBUFFER_BINDING:
+      *params = bound_framebuffer_;
+      return true;
     case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
       *params = capabilities_.max_combined_texture_image_units;
       return true;
@@ -651,21 +666,8 @@ bool GLES2Implementation::GetHelper(GLenum pname, GLint* params) {
     case GL_NUM_SHADER_BINARY_FORMATS:
       *params = capabilities_.num_shader_binary_formats;
       return true;
-    case GL_ARRAY_BUFFER_BINDING:
-      *params = bound_array_buffer_id_;
-      return true;
-    case GL_ELEMENT_ARRAY_BUFFER_BINDING:
-      *params =
-          vertex_array_object_manager_->bound_element_array_buffer();
-      return true;
-    case GL_PIXEL_PACK_TRANSFER_BUFFER_BINDING_CHROMIUM:
-      *params = bound_pixel_pack_transfer_buffer_id_;
-      return true;
-    case GL_PIXEL_UNPACK_TRANSFER_BUFFER_BINDING_CHROMIUM:
-      *params = bound_pixel_unpack_transfer_buffer_id_;
-      return true;
-    case GL_ACTIVE_TEXTURE:
-      *params = active_texture_unit_ + GL_TEXTURE0;
+    case GL_RENDERBUFFER_BINDING:
+      *params = bound_renderbuffer_;
       return true;
     case GL_TEXTURE_BINDING_2D:
       *params = texture_units_[active_texture_unit_].bound_texture_2d;
@@ -673,32 +675,249 @@ bool GLES2Implementation::GetHelper(GLenum pname, GLint* params) {
     case GL_TEXTURE_BINDING_CUBE_MAP:
       *params = texture_units_[active_texture_unit_].bound_texture_cube_map;
       return true;
+
+    // Non-standard parameters.
     case GL_TEXTURE_BINDING_EXTERNAL_OES:
       *params =
           texture_units_[active_texture_unit_].bound_texture_external_oes;
       return true;
-    case GL_FRAMEBUFFER_BINDING:
-      *params = bound_framebuffer_;
+    case GL_PIXEL_PACK_TRANSFER_BUFFER_BINDING_CHROMIUM:
+      *params = bound_pixel_pack_transfer_buffer_id_;
+      return true;
+    case GL_PIXEL_UNPACK_TRANSFER_BUFFER_BINDING_CHROMIUM:
+      *params = bound_pixel_unpack_transfer_buffer_id_;
       return true;
     case GL_READ_FRAMEBUFFER_BINDING:
       if (IsChromiumFramebufferMultisampleAvailable()) {
         *params = bound_read_framebuffer_;
         return true;
       }
+      break;
+
+    // Non-cached parameters.
+    case GL_ALIASED_LINE_WIDTH_RANGE:
+    case GL_ALIASED_POINT_SIZE_RANGE:
+    case GL_ALPHA_BITS:
+    case GL_BLEND:
+    case GL_BLEND_COLOR:
+    case GL_BLEND_DST_ALPHA:
+    case GL_BLEND_DST_RGB:
+    case GL_BLEND_EQUATION_ALPHA:
+    case GL_BLEND_EQUATION_RGB:
+    case GL_BLEND_SRC_ALPHA:
+    case GL_BLEND_SRC_RGB:
+    case GL_BLUE_BITS:
+    case GL_COLOR_CLEAR_VALUE:
+    case GL_COLOR_WRITEMASK:
+    case GL_COMPRESSED_TEXTURE_FORMATS:
+    case GL_CULL_FACE:
+    case GL_CULL_FACE_MODE:
+    case GL_CURRENT_PROGRAM:
+    case GL_DEPTH_BITS:
+    case GL_DEPTH_CLEAR_VALUE:
+    case GL_DEPTH_FUNC:
+    case GL_DEPTH_RANGE:
+    case GL_DEPTH_TEST:
+    case GL_DEPTH_WRITEMASK:
+    case GL_DITHER:
+    case GL_FRONT_FACE:
+    case GL_GENERATE_MIPMAP_HINT:
+    case GL_GREEN_BITS:
+    case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
+    case GL_IMPLEMENTATION_COLOR_READ_TYPE:
+    case GL_LINE_WIDTH:
+    case GL_MAX_VIEWPORT_DIMS:
+    case GL_PACK_ALIGNMENT:
+    case GL_POLYGON_OFFSET_FACTOR:
+    case GL_POLYGON_OFFSET_FILL:
+    case GL_POLYGON_OFFSET_UNITS:
+    case GL_RED_BITS:
+    case GL_SAMPLE_ALPHA_TO_COVERAGE:
+    case GL_SAMPLE_BUFFERS:
+    case GL_SAMPLE_COVERAGE:
+    case GL_SAMPLE_COVERAGE_INVERT:
+    case GL_SAMPLE_COVERAGE_VALUE:
+    case GL_SAMPLES:
+    case GL_SCISSOR_BOX:
+    case GL_SCISSOR_TEST:
+    case GL_SHADER_COMPILER:
+    case GL_STENCIL_BACK_FAIL:
+    case GL_STENCIL_BACK_FUNC:
+    case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
+    case GL_STENCIL_BACK_PASS_DEPTH_PASS:
+    case GL_STENCIL_BACK_REF:
+    case GL_STENCIL_BACK_VALUE_MASK:
+    case GL_STENCIL_BACK_WRITEMASK:
+    case GL_STENCIL_BITS:
+    case GL_STENCIL_CLEAR_VALUE:
+    case GL_STENCIL_FAIL:
+    case GL_STENCIL_FUNC:
+    case GL_STENCIL_PASS_DEPTH_FAIL:
+    case GL_STENCIL_PASS_DEPTH_PASS:
+    case GL_STENCIL_REF:
+    case GL_STENCIL_TEST:
+    case GL_STENCIL_VALUE_MASK:
+    case GL_STENCIL_WRITEMASK:
+    case GL_SUBPIXEL_BITS:
+    case GL_UNPACK_ALIGNMENT:
+    case GL_VIEWPORT:
       return false;
-    case GL_RENDERBUFFER_BINDING:
-      *params = bound_renderbuffer_;
+    default:
+      break;
+  }
+
+  if (capabilities_.major_version < 3) {
+    return false;
+  }
+
+  // ES3 parameters.
+  switch (pname) {
+    case GL_MAJOR_VERSION:
+      *params = capabilities_.major_version;
       return true;
-    case GL_MAX_UNIFORM_BUFFER_BINDINGS:
-      *params = capabilities_.max_uniform_buffer_bindings;
+    case GL_MAX_3D_TEXTURE_SIZE:
+      *params = capabilities_.max_3d_texture_size;
+      return true;
+    case GL_MAX_ARRAY_TEXTURE_LAYERS:
+      *params = capabilities_.max_array_texture_layers;
+      return true;
+    case GL_MAX_COLOR_ATTACHMENTS:
+      *params = capabilities_.max_color_attachments;
+      return true;
+    case GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS:
+      *params = capabilities_.max_combined_fragment_uniform_components;
+      return true;
+    case GL_MAX_COMBINED_UNIFORM_BLOCKS:
+      *params = capabilities_.max_combined_uniform_blocks;
+      return true;
+    case GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS:
+      *params = capabilities_.max_combined_vertex_uniform_components;
+      return true;
+    case GL_MAX_DRAW_BUFFERS:
+      *params = capabilities_.max_draw_buffers;
+      return true;
+    case GL_MAX_ELEMENT_INDEX:
+      *params = capabilities_.max_element_index;
+      return true;
+    case GL_MAX_ELEMENTS_INDICES:
+      *params = capabilities_.max_elements_indices;
+      return true;
+    case GL_MAX_ELEMENTS_VERTICES:
+      *params = capabilities_.max_elements_vertices;
+      return true;
+    case GL_MAX_FRAGMENT_INPUT_COMPONENTS:
+      *params = capabilities_.max_fragment_input_components;
+      return true;
+    case GL_MAX_FRAGMENT_UNIFORM_BLOCKS:
+      *params = capabilities_.max_fragment_uniform_blocks;
+      return true;
+    case GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
+      *params = capabilities_.max_fragment_uniform_components;
+      return true;
+    case GL_MAX_PROGRAM_TEXEL_OFFSET:
+      *params = capabilities_.max_program_texel_offset;
+      return true;
+    case GL_MAX_SAMPLES:
+      *params = capabilities_.max_samples;
+      return true;
+    case GL_MAX_SERVER_WAIT_TIMEOUT:
+      *params = capabilities_.max_server_wait_timeout;
+      return true;
+    case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
+      *params = capabilities_.max_transform_feedback_interleaved_components;
       return true;
     case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
       *params = capabilities_.max_transform_feedback_separate_attribs;
       return true;
+    case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
+      *params = capabilities_.max_transform_feedback_separate_components;
+      return true;
+    case GL_MAX_UNIFORM_BLOCK_SIZE:
+      *params = capabilities_.max_uniform_block_size;
+      return true;
+    case GL_MAX_UNIFORM_BUFFER_BINDINGS:
+      *params = capabilities_.max_uniform_buffer_bindings;
+      return true;
+    case GL_MAX_VARYING_COMPONENTS:
+      *params = capabilities_.max_varying_components;
+      return true;
+    case GL_MAX_VERTEX_OUTPUT_COMPONENTS:
+      *params = capabilities_.max_vertex_output_components;
+      return true;
+    case GL_MAX_VERTEX_UNIFORM_BLOCKS:
+      *params = capabilities_.max_vertex_uniform_blocks;
+      return true;
+    case GL_MAX_VERTEX_UNIFORM_COMPONENTS:
+      *params = capabilities_.max_vertex_uniform_components;
+      return true;
+    case GL_MIN_PROGRAM_TEXEL_OFFSET:
+      *params = capabilities_.min_program_texel_offset;
+      return true;
+    case GL_MINOR_VERSION:
+      *params = capabilities_.minor_version;
+      return true;
+    case GL_NUM_EXTENSIONS:
+      *params = capabilities_.num_extensions;
+      return true;
+    case GL_NUM_PROGRAM_BINARY_FORMATS:
+      *params = capabilities_.num_program_binary_formats;
+      return true;
     case GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
       *params = capabilities_.uniform_buffer_offset_alignment;
       return true;
-    // TODO(zmo): Support ES3 pnames.
+
+    // Non-cached ES3 parameters.
+    case GL_COPY_READ_BUFFER_BINDING:
+    case GL_COPY_WRITE_BUFFER_BINDING:
+    case GL_DRAW_BUFFER0:
+    case GL_DRAW_BUFFER1:
+    case GL_DRAW_BUFFER2:
+    case GL_DRAW_BUFFER3:
+    case GL_DRAW_BUFFER4:
+    case GL_DRAW_BUFFER5:
+    case GL_DRAW_BUFFER6:
+    case GL_DRAW_BUFFER7:
+    case GL_DRAW_BUFFER8:
+    case GL_DRAW_BUFFER9:
+    case GL_DRAW_BUFFER10:
+    case GL_DRAW_BUFFER11:
+    case GL_DRAW_BUFFER12:
+    case GL_DRAW_BUFFER13:
+    case GL_DRAW_BUFFER14:
+    case GL_DRAW_BUFFER15:
+    case GL_DRAW_FRAMEBUFFER_BINDING:
+    case GL_FRAGMENT_SHADER_DERIVATIVE_HINT:
+    case GL_MAX_TEXTURE_LOD_BIAS:
+    case GL_PACK_ROW_LENGTH:
+    case GL_PACK_SKIP_PIXELS:
+    case GL_PACK_SKIP_ROWS:
+    case GL_PIXEL_PACK_BUFFER_BINDING:
+    case GL_PIXEL_UNPACK_BUFFER_BINDING:
+    case GL_PRIMITIVE_RESTART_FIXED_INDEX:
+    case GL_PROGRAM_BINARY_FORMATS:
+    case GL_RASTERIZER_DISCARD:
+    case GL_READ_BUFFER:
+    case GL_READ_FRAMEBUFFER_BINDING:
+    case GL_SAMPLER_BINDING:
+    case GL_SHADER_BINARY_FORMATS:
+    case GL_TEXTURE_BINDING_2D_ARRAY:
+    case GL_TEXTURE_BINDING_3D:
+    case GL_TRANSFORM_FEEDBACK_BINDING:
+    case GL_TRANSFORM_FEEDBACK_ACTIVE:
+    case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+    case GL_TRANSFORM_FEEDBACK_PAUSED:
+    case GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
+    case GL_TRANSFORM_FEEDBACK_BUFFER_START:
+    case GL_UNIFORM_BUFFER_BINDING:
+    case GL_UNIFORM_BUFFER_SIZE:
+    case GL_UNIFORM_BUFFER_START:
+    case GL_UNPACK_IMAGE_HEIGHT:
+    case GL_UNPACK_ROW_LENGTH:
+    case GL_UNPACK_SKIP_IMAGES:
+    case GL_UNPACK_SKIP_PIXELS:
+    case GL_UNPACK_SKIP_ROWS:
+    case GL_VERTEX_ARRAY_BINDING:
+      return false;
     default:
       return false;
   }