| #!/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. |
| # |
| # angle_format.py: |
| # Utils for ANGLE formats. |
| |
| import json |
| import os |
| import re |
| |
| def reject_duplicate_keys(pairs): |
| found_keys = {} |
| for key, value in pairs: |
| if key in found_keys: |
| raise ValueError("duplicate key: %r" % (key,)) |
| else: |
| found_keys[key] = value |
| return found_keys |
| |
| def load_json(path): |
| with open(path) as map_file: |
| file_data = map_file.read() |
| map_file.close() |
| return json.loads(file_data, object_pairs_hook=reject_duplicate_keys) |
| |
| def load_forward_table(path): |
| pairs = load_json(path) |
| reject_duplicate_keys(pairs) |
| return { gl: angle for gl, angle in pairs } |
| |
| def load_inverse_table(path): |
| pairs = load_json(path) |
| reject_duplicate_keys(pairs) |
| return { angle: gl for gl, angle in pairs } |
| |
| def load_without_override(): |
| map_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'angle_format_map.json') |
| return load_forward_table(map_path) |
| |
| def load_with_override(override_path): |
| results = load_without_override() |
| overrides = load_json(override_path) |
| |
| for k, v in overrides.iteritems(): |
| results[k] = v |
| |
| return results |
| |
| def get_component_type(format_id): |
| if "SNORM" in format_id: |
| return "snorm" |
| elif "UNORM" in format_id: |
| return "unorm" |
| elif "FLOAT" in format_id: |
| return "float" |
| elif "UINT" in format_id: |
| return "uint" |
| elif "SINT" in format_id: |
| return "int" |
| elif format_id == "NONE": |
| return "none" |
| elif "SRGB" in format_id: |
| return "unorm" |
| elif format_id == "R9G9B9E5_SHAREDEXP": |
| return "float" |
| else: |
| raise ValueError("Unknown component type for " + format_id) |
| |
| def get_channel_tokens(format_id): |
| r = re.compile(r'([ABDGLRS][\d]+)') |
| return filter(r.match, r.split(format_id)) |
| |
| def get_channels(format_id): |
| channels = '' |
| tokens = get_channel_tokens(format_id) |
| if len(tokens) == 0: |
| return None |
| for token in tokens: |
| channels += token[0].lower() |
| |
| return channels |
| |
| def get_bits(format_id): |
| bits = {} |
| tokens = get_channel_tokens(format_id) |
| if len(tokens) == 0: |
| return None |
| for token in tokens: |
| bits[token[0]] = int(token[1:]) |
| return bits |
| |
| def get_format_info(format_id): |
| return get_component_type(format_id), get_bits(format_id), get_channels(format_id) |
| |
| # TODO(oetuaho): Expand this code so that it could generate the gl format info tables as well. |
| def gl_format_channels(internal_format): |
| if internal_format == 'GL_BGR5_A1_ANGLEX': |
| return 'bgra' |
| if internal_format == 'GL_R11F_G11F_B10F': |
| return 'rgb' |
| if internal_format == 'GL_RGB5_A1': |
| return 'rgba' |
| if internal_format.find('GL_RGB10_A2') == 0: |
| return 'rgba' |
| |
| channels_pattern = re.compile('GL_(COMPRESSED_)?(SIGNED_)?(ETC\d_)?([A-Z]+)') |
| match = re.search(channels_pattern, internal_format) |
| channels_string = match.group(4) |
| |
| if channels_string == 'ALPHA': |
| return 'a' |
| if channels_string == 'LUMINANCE': |
| if (internal_format.find('ALPHA') >= 0): |
| return 'la' |
| return 'l' |
| if channels_string == 'SRGB': |
| if (internal_format.find('ALPHA') >= 0): |
| return 'rgba' |
| return 'rgb' |
| if channels_string == 'DEPTH': |
| if (internal_format.find('STENCIL') >= 0): |
| return 'ds' |
| return 'd' |
| if channels_string == 'STENCIL': |
| return 's' |
| return channels_string.lower() |
| |
| def get_internal_format_initializer(internal_format, format_id): |
| gl_channels = gl_format_channels(internal_format) |
| gl_format_no_alpha = gl_channels == 'rgb' or gl_channels == 'l' |
| component_type, bits, channels = get_format_info(format_id) |
| |
| if not gl_format_no_alpha or channels != 'rgba': |
| return 'nullptr' |
| |
| elif 'BC1_' in format_id: |
| # BC1 is a special case since the texture data determines whether each block has an alpha channel or not. |
| # This if statement is hit by COMPRESSED_RGB_S3TC_DXT1, which is a bit of a mess. |
| # TODO(oetuaho): Look into whether COMPRESSED_RGB_S3TC_DXT1 works right in general. |
| # Reference: https://www.opengl.org/registry/specs/EXT/texture_compression_s3tc.txt |
| return 'nullptr' |
| |
| elif component_type == 'uint' and bits['R'] == 8: |
| return 'Initialize4ComponentData<GLubyte, 0x00, 0x00, 0x00, 0x01>' |
| elif component_type == 'unorm' and bits['R'] == 8: |
| return 'Initialize4ComponentData<GLubyte, 0x00, 0x00, 0x00, 0xFF>' |
| elif component_type == 'unorm' and bits['R'] == 16: |
| return 'Initialize4ComponentData<GLubyte, 0x0000, 0x0000, 0x0000, 0xFFFF>' |
| elif component_type == 'int' and bits['R'] == 8: |
| return 'Initialize4ComponentData<GLbyte, 0x00, 0x00, 0x00, 0x01>' |
| elif component_type == 'snorm' and bits['R'] == 8: |
| return 'Initialize4ComponentData<GLbyte, 0x00, 0x00, 0x00, 0x7F>' |
| elif component_type == 'snorm' and bits['R'] == 16: |
| return 'Initialize4ComponentData<GLushort, 0x0000, 0x0000, 0x0000, 0x7FFF>' |
| elif component_type == 'float' and bits['R'] == 16: |
| return 'Initialize4ComponentData<GLhalf, 0x0000, 0x0000, 0x0000, gl::Float16One>' |
| elif component_type == 'uint' and bits['R'] == 16: |
| return 'Initialize4ComponentData<GLushort, 0x0000, 0x0000, 0x0000, 0x0001>' |
| elif component_type == 'int' and bits['R'] == 16: |
| return 'Initialize4ComponentData<GLshort, 0x0000, 0x0000, 0x0000, 0x0001>' |
| elif component_type == 'float' and bits['R'] == 32: |
| return 'Initialize4ComponentData<GLfloat, 0x00000000, 0x00000000, 0x00000000, gl::Float32One>' |
| elif component_type == 'int' and bits['R'] == 32: |
| return 'Initialize4ComponentData<GLint, 0x00000000, 0x00000000, 0x00000000, 0x00000001>' |
| elif component_type == 'uint' and bits['R'] == 32: |
| return 'Initialize4ComponentData<GLuint, 0x00000000, 0x00000000, 0x00000000, 0x00000001>' |
| else: |
| raise ValueError('warning: internal format initializer could not be generated and may be needed for ' + internal_format) |
