command_buffer: Support instanced path rendering in gpu command buffer

Implement support for instanced path rendering in gpu command buffer.
Exposes following new functions through command buffer:
glStencilFillPathInstancedCHROMIUM
glStencilStrokePathInstancedCHROMIUM
glCoverFillPathInstancedCHROMIUM
glCoverStrokePathInstancedCHROMIUM
glStencilThenCoverFillPathInstancedCHROMIUM
glStencilThenCoverStrokePathInstancedCHROMIUM

These functions are exposed as part of the CHROMIUM_path_rendering
GL ES extension.

Converts the NV_path_rendering functions that Skia calls to these
functions, passes the calls through the command buffer and then
calls the corresponding NV_path_rendering functions.

BUG=344330

Review URL: https://codereview.chromium.org/477623004

Cr-Commit-Position: refs/heads/master@{#356526}

1 files changed, 39 insertions, 0 deletions

diff --git a/gpu/command_buffer/common/gles2_cmd_utils.cc b/gpu/command_buffer/common/gles2_cmd_utils.cc
index 8417b06..0376425 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.cc
+++ b/gpu/command_buffer/common/gles2_cmd_utils.cc
@@ -739,6 +739,26 @@ size_t GLES2Util::GetGLTypeSizeForTexturesAndBuffers(uint32 type) {
   }
 }
 
+size_t GLES2Util::GetComponentCountForGLTransformType(uint32 type) {
+  switch (type) {
+    case GL_TRANSLATE_X_CHROMIUM:
+    case GL_TRANSLATE_Y_CHROMIUM:
+      return 1;
+    case GL_TRANSLATE_2D_CHROMIUM:
+      return 2;
+    case GL_TRANSLATE_3D_CHROMIUM:
+      return 3;
+    case GL_AFFINE_2D_CHROMIUM:
+    case GL_TRANSPOSE_AFFINE_2D_CHROMIUM:
+      return 6;
+    case GL_AFFINE_3D_CHROMIUM:
+    case GL_TRANSPOSE_AFFINE_3D_CHROMIUM:
+      return 12;
+    default:
+      return 0;
+  }
+}
+
 size_t GLES2Util::GetGLTypeSizeForPathCoordType(uint32 type) {
   switch (type) {
     case GL_BYTE:
@@ -756,6 +776,25 @@ size_t GLES2Util::GetGLTypeSizeForPathCoordType(uint32 type) {
   }
 }
 
+size_t GLES2Util::GetGLTypeSizeForGLPathNameType(uint32 type) {
+  switch (type) {
+    case GL_BYTE:
+      return sizeof(GLbyte);  // NOLINT
+    case GL_UNSIGNED_BYTE:
+      return sizeof(GLubyte);  // NOLINT
+    case GL_SHORT:
+      return sizeof(GLshort);  // NOLINT
+    case GL_UNSIGNED_SHORT:
+      return sizeof(GLushort);  // NOLINT
+    case GL_INT:
+      return sizeof(GLint);  // NOLINT
+    case GL_UNSIGNED_INT:
+      return sizeof(GLuint);  // NOLINT
+    default:
+      return 0;
+  }
+}
+
 uint32 GLES2Util::GLErrorToErrorBit(uint32 error) {
   switch (error) {
     case GL_INVALID_ENUM: