Make the "FormatMap" a static switch.

src/libANGLE/format_map_data.json

+{
+    "GL_RGBA": {
+        "GL_UNSIGNED_BYTE": "GL_RGBA8",
+        "GL_UNSIGNED_SHORT": "GL_RGBA16_EXT",
+        "GL_BYTE": "GL_RGBA8_SNORM",
+        "GL_SHORT": "GL_RGBA16_SNORM_EXT",
+        "GL_UNSIGNED_SHORT_4_4_4_4": "GL_RGBA4",
+        "GL_UNSIGNED_SHORT_5_5_5_1": "GL_RGB5_A1",
+        "GL_UNSIGNED_INT_2_10_10_10_REV": "GL_RGB10_A2",
+        "GL_FLOAT": "GL_RGBA32F",
+        "GL_HALF_FLOAT": "GL_RGBA16F",
+        "GL_HALF_FLOAT_OES": "GL_RGBA16F"
+    },
+    "GL_RGBA_INTEGER": {
+        "GL_UNSIGNED_BYTE": "GL_RGBA8UI",
+        "GL_BYTE": "GL_RGBA8I",
+        "GL_UNSIGNED_SHORT": "GL_RGBA16UI",
+        "GL_SHORT": "GL_RGBA16I",
+        "GL_UNSIGNED_INT": "GL_RGBA32UI",
+        "GL_INT": "GL_RGBA32I",
+        "GL_UNSIGNED_INT_2_10_10_10_REV": "GL_RGB10_A2UI"
+    },
+    "GL_RGB": {
+        "GL_UNSIGNED_BYTE": "GL_RGB8",
+        "GL_UNSIGNED_SHORT": "GL_RGB16_EXT",
+        "GL_BYTE": "GL_RGB8_SNORM",
+        "GL_SHORT": "GL_RGB16_SNORM_EXT",
+        "GL_UNSIGNED_SHORT_5_6_5": "GL_RGB565",
+        "GL_UNSIGNED_INT_10F_11F_11F_REV": "GL_R11F_G11F_B10F",
+        "GL_UNSIGNED_INT_5_9_9_9_REV": "GL_RGB9_E5",
+        "GL_FLOAT": "GL_RGB32F",
+        "GL_HALF_FLOAT": "GL_RGB16F",
+        "GL_HALF_FLOAT_OES": "GL_RGB16F"
+    },
+    "GL_RGB_INTEGER": {
+        "GL_UNSIGNED_BYTE": "GL_RGB8UI",
+        "GL_BYTE": "GL_RGB8I", "GL_UNSIGNED_SHORT": "GL_RGB16UI",
+        "GL_SHORT": "GL_RGB16I",
+        "GL_UNSIGNED_INT": "GL_RGB32UI",
+        "GL_INT": "GL_RGB32I"
+    },
+    "GL_RG": {
+        "GL_UNSIGNED_BYTE": "GL_RG8",
+        "GL_UNSIGNED_SHORT": "GL_RG16_EXT",
+        "GL_BYTE": "GL_RG8_SNORM",
+        "GL_SHORT": "GL_RG16_SNORM_EXT",
+        "GL_FLOAT": "GL_RG32F",
+        "GL_HALF_FLOAT": "GL_RG16F",
+        "GL_HALF_FLOAT_OES": "GL_RG16F"
+    },
+    "GL_RG_INTEGER": {
+        "GL_UNSIGNED_BYTE": "GL_RG8UI",
+        "GL_BYTE": "GL_RG8I",
+        "GL_UNSIGNED_SHORT": "GL_RG16UI",
+        "GL_SHORT": "GL_RG16I",
+        "GL_UNSIGNED_INT": "GL_RG32UI",
+        "GL_INT": "GL_RG32I"
+    },
+    "GL_RED": {
+        "GL_UNSIGNED_BYTE": "GL_R8",
+        "GL_UNSIGNED_SHORT": "GL_R16_EXT",
+        "GL_BYTE": "GL_R8_SNORM",
+        "GL_SHORT": "GL_R16_SNORM_EXT",
+        "GL_FLOAT": "GL_R32F",
+        "GL_HALF_FLOAT": "GL_R16F",
+        "GL_HALF_FLOAT_OES": "GL_R16F"
+    },
+    "GL_RED_INTEGER": {
+        "GL_UNSIGNED_BYTE": "GL_R8UI",
+        "GL_BYTE": "GL_R8I",
+        "GL_UNSIGNED_SHORT": "GL_R16UI",
+        "GL_SHORT": "GL_R16I",
+        "GL_UNSIGNED_INT": "GL_R32UI",
+        "GL_INT": "GL_R32I"
+    },
+    "GL_LUMINANCE_ALPHA": {
+        "GL_UNSIGNED_BYTE": "GL_LUMINANCE8_ALPHA8_EXT",
+        "GL_FLOAT": "GL_LUMINANCE_ALPHA32F_EXT",
+        "GL_HALF_FLOAT": "GL_LUMINANCE_ALPHA16F_EXT",
+        "GL_HALF_FLOAT_OES": "GL_LUMINANCE_ALPHA16F_EXT"
+    },
+    "GL_LUMINANCE": {
+        "GL_UNSIGNED_BYTE": "GL_LUMINANCE8_EXT",
+        "GL_FLOAT": "GL_LUMINANCE32F_EXT",
+        "GL_HALF_FLOAT": "GL_LUMINANCE16F_EXT",
+        "GL_HALF_FLOAT_OES": "GL_LUMINANCE16F_EXT"
+    },
+    "GL_ALPHA": {
+        "GL_UNSIGNED_BYTE": "GL_ALPHA8_EXT",
+        "GL_FLOAT": "GL_ALPHA32F_EXT",
+        "GL_HALF_FLOAT": "GL_ALPHA16F_EXT",
+        "GL_HALF_FLOAT_OES": "GL_ALPHA16F_EXT"
+    },
+    "GL_BGRA_EXT": {
+        "GL_UNSIGNED_BYTE": "GL_BGRA8_EXT",
+        "GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT": "GL_BGRA4_ANGLEX",
+        "GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT": "GL_BGR5_A1_ANGLEX",
+        "GL_UNSIGNED_SHORT_5_6_5": "GL_BGR565_ANGLEX"
+    },
+    "GL_SRGB_EXT": {
+        "GL_UNSIGNED_BYTE": "GL_SRGB8"
+    },
+    "GL_SRGB_ALPHA_EXT": {
+        "GL_UNSIGNED_BYTE": "GL_SRGB8_ALPHA8"
+    },
+    "GL_COMPRESSED_RGB_S3TC_DXT1_EXT": {
+        "GL_UNSIGNED_BYTE": "GL_COMPRESSED_RGB_S3TC_DXT1_EXT"
+    },
+    "GL_COMPRESSED_RGBA_S3TC_DXT1_EXT": {
+        "GL_UNSIGNED_BYTE": "GL_COMPRESSED_RGBA_S3TC_DXT1_EXT"
+    },
+    "GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE": {
+        "GL_UNSIGNED_BYTE": "GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE"
+    },
+    "GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE": {
+        "GL_UNSIGNED_BYTE": "GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE"
+    },
+    "GL_DEPTH_COMPONENT": {
+        "GL_UNSIGNED_SHORT": "GL_DEPTH_COMPONENT16",
+        "GL_UNSIGNED_INT": "GL_DEPTH_COMPONENT32_OES",
+        "GL_FLOAT": "GL_DEPTH_COMPONENT32F"
+    },
+    "GL_STENCIL": {
+        "GL_UNSIGNED_BYTE": "GL_STENCIL_INDEX8"
+    },
+    "GL_DEPTH_STENCIL": {
+        "GL_UNSIGNED_INT_24_8": "GL_DEPTH24_STENCIL8",
+        "GL_FLOAT_32_UNSIGNED_INT_24_8_REV": "GL_DEPTH32F_STENCIL8"
+    }
+}

src/libANGLE/gen_format_map.py

+#!/usr/bin/python
+# Copyright 2016 The ANGLE Project Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# gen_format_map.py:
+#  Code generation for GL format map. The format map matches between
+#  {format,type} and internal format.
+
+from datetime import date
+import sys
+
+sys.path.append('renderer')
+import angle_format
+
+template_cpp = """// GENERATED FILE - DO NOT EDIT.
+// Generated by {script_name} using data from {data_source_name}.
+//
+// Copyright {copyright_year} The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// format_map:
+//   Determining the sized internal format from a (format,type) pair.
+
+#include "angle_gl.h"
+#include "common/debug.h"
+
+namespace gl
+{{
+
+GLenum GetSizedFormatInternal(GLenum format, GLenum type)
+{{
+    switch (format)
+    {{
+{format_cases}        case GL_NONE:
+            return GL_NONE;
+
+        default:
+            break;
+    }}
+
+    UNREACHABLE();
+    return GL_NONE;
+}}
+
+}}  // namespace gl
+"""
+
+template_format_case = """        case {format}:
+            switch (type)
+            {{
+{type_cases}                default:
+                    break;
+            }}
+            break;
+
+"""
+
+template_type_case = """                case {type}:
+                    return {internal_format};
+"""
+
+def parse_type_case(type, internal_format):
+    return template_type_case.format(
+        type = type, internal_format = internal_format)
+
+def parse_format_case(format, type_map):
+    type_cases = ""
+    for type, internal_format in sorted(type_map.iteritems()):
+        type_cases += parse_type_case(type, internal_format)
+    return template_format_case.format(
+        format = format, type_cases = type_cases)
+
+input_script = 'format_map_data.json'
+
+format_map = angle_format.load_json(input_script)
+
+format_cases = ""
+
+for format, type_map in sorted(format_map.iteritems()):
+    format_cases += parse_format_case(format, type_map)
+
+with open('format_map_autogen.cpp', 'wt') as out_file:
+    output_cpp = template_cpp.format(
+        script_name = sys.argv[0],
+        data_source_name = input_script,
+        copyright_year = date.today().year,
+        format_cases = format_cases)
+    out_file.write(output_cpp)
+    out_file.close()

src/libGLESv2.gypi

@@ -153,6 +153,7 @@
             'libANGLE/angletypes.h',
             'libANGLE/angletypes.inl',
             'libANGLE/features.h',
+            'libANGLE/format_map_autogen.cpp',
             'libANGLE/formatutils.cpp',
             'libANGLE/formatutils.h',
             'libANGLE/histogram_macros.h',