gen_angle_format_table.py

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Author : Jamie Madill
Date : 2018-07-18 17:23:48
Hash : b436aac3
Message : Vulkan: Support inverted blit for depth/stencil. Depth/stencil formats are packed tightly when reading back Images with vkCmdCopyImageToBuffer. Same for the reverse. Thus we need to take this into account when doing our blitWithReadback implementation. This splits the depth/stencil blit into two separate steps. Fixes all the remaining blit failures in BlitFramebufferANGLETest. Bug: angleproject:2673 Change-Id: Ie9f43f782a82b5a0746d00122b24f81088d57c4c Reviewed-on: https://chromium-review.googlesource.com/1140740 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>
src/libANGLE/renderer/gen_angle_format_table.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_angle_format_table.py:
#  Code generation for ANGLE format map.
#

import angle_format
from datetime import date
import json
import math
import pprint
import re
import sys

template_autogen_h = """// 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.
//
// ANGLE format enumeration.

namespace angle
{{

enum class FormatID
{{
{angle_format_enum}
}};

constexpr uint32_t kNumANGLEFormats = {num_angle_formats};

}}  // namespace angle
"""

template_autogen_inl = """// 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.
//
// ANGLE Format table:
//   Queries for typed format information from the ANGLE format enum.

#include "libANGLE/renderer/Format.h"

#include "image_util/copyimage.h"
#include "image_util/generatemip.h"
#include "image_util/loadimage.h"

namespace angle
{{

static constexpr rx::FastCopyFunctionMap::Entry BGRAEntry = {{angle::FormatID::R8G8B8A8_UNORM,
                                                             CopyBGRA8ToRGBA8}};
static constexpr rx::FastCopyFunctionMap BGRACopyFunctions = {{&BGRAEntry, 1}};
static constexpr rx::FastCopyFunctionMap NoCopyFunctions;

constexpr Format g_formatInfoTable[] = {{
    // clang-format off
    {{ FormatID::NONE, GL_NONE, GL_NONE, nullptr, NoCopyFunctions, nullptr, nullptr, GL_NONE, 0, 0, 0, 0, 0, 0, 0, false }},
{angle_format_info_cases}    // clang-format on
}};

// static
FormatID Format::InternalFormatToID(GLenum internalFormat)
{{
    switch (internalFormat)
    {{
{angle_format_switch}
    }}
}}

// static
const Format &Format::Get(FormatID id)
{{
    return g_formatInfoTable[static_cast<size_t>(id)];
}}

}}  // namespace angle
"""

def is_depth_stencil(angle_format):
    if not 'channels' in angle_format or not angle_format['channels']:
        return False
    return 'd' in angle_format['channels'] or 's' in angle_format['channels']

def get_component_suffix(angle_format):
    if angle_format['componentType'] == 'float':
        return 'F'
    if angle_format['componentType'] == 'int' or angle_format['componentType'] == 'snorm':
        return 'S'
    return ""

def get_channel_struct(angle_format):
    if 'bits' not in angle_format or angle_format['bits'] is None:
        return None
    if 'BLOCK' in angle_format['id']:
        return None
    bits = angle_format['bits']

    if 'channelStruct' in angle_format:
        return angle_format['channelStruct']

    struct_name = ''
    component_suffix = get_component_suffix(angle_format)

    for channel in angle_format['channels']:
        if channel == 'r':
            struct_name += 'R{}'.format(bits['R'])
        if channel == 'g':
            struct_name += 'G{}'.format(bits['G'])
        if channel == 'b':
            struct_name += 'B{}'.format(bits['B'])
        if channel == 'a':
            struct_name += 'A{}'.format(bits['A'])
        if channel == 'l':
            struct_name += 'L{}'.format(bits['L'])
        if channel == 'd':
            struct_name += 'D{}'.format(bits['D']) + component_suffix
        if channel == 's':
            struct_name += 'S{}'.format(bits['S'])

    if not is_depth_stencil(angle_format):
        struct_name += component_suffix

    return struct_name

def get_mip_generation_function(angle_format):
    channel_struct = get_channel_struct(angle_format)
    if is_depth_stencil(angle_format) or channel_struct == None or "BLOCK" in angle_format["id"]:
        return 'nullptr'
    return 'GenerateMip<' + channel_struct + '>'

def get_color_read_write_component_type(angle_format):
    component_type_map = {
        'uint': 'GLuint',
        'int': 'GLint',
        'unorm': 'GLfloat',
        'snorm': 'GLfloat',
        'float': 'GLfloat'
    }
    return component_type_map[angle_format['componentType']]

def get_color_read_function(angle_format):
    channel_struct = get_channel_struct(angle_format)
    if channel_struct == None:
        return 'nullptr'

    if is_depth_stencil(angle_format):
        return 'ReadDepthStencil<' + channel_struct + '>'

    read_component_type = get_color_read_write_component_type(angle_format)
    return 'ReadColor<' + channel_struct + ', '+ read_component_type + '>'

def get_color_write_function(angle_format):
    channel_struct = get_channel_struct(angle_format)
    if channel_struct == None:
        return 'nullptr'

    if is_depth_stencil(angle_format):
        return 'WriteDepthStencil<' + channel_struct + '>'

    write_component_type = get_color_read_write_component_type(angle_format)
    return 'WriteColor<' + channel_struct + ', '+ write_component_type + '>'


format_entry_template = """    {{ FormatID::{id}, {glInternalFormat}, {fboImplementationInternalFormat}, {mipGenerationFunction}, {fastCopyFunctions}, {colorReadFunction}, {colorWriteFunction}, {namedComponentType}, {R}, {G}, {B}, {A}, {D}, {S}, {pixelBytes}, {isBlock} }},
"""

def get_named_component_type(component_type):
    if component_type == "snorm":
        return "GL_SIGNED_NORMALIZED"
    elif component_type == "unorm":
        return "GL_UNSIGNED_NORMALIZED"
    elif component_type == "float":
        return "GL_FLOAT"
    elif component_type == "uint":
        return "GL_UNSIGNED_INT"
    elif component_type == "int":
        return "GL_INT"
    elif component_type == "none":
        return "GL_NONE"
    else:
        raise ValueError("Unknown component type for " + component_type)

def json_to_table_data(format_id, json, angle_to_gl):

    table_data = ""

    parsed = {
        "id": format_id,
        "fastCopyFunctions": "NoCopyFunctions",
    }

    for k, v in json.iteritems():
        parsed[k] = v

    if "glInternalFormat" not in parsed:
        parsed["glInternalFormat"] = angle_to_gl[format_id]

    if "fboImplementationInternalFormat" not in parsed:
        parsed["fboImplementationInternalFormat"] = parsed["glInternalFormat"]

    if "componentType" not in parsed:
        parsed["componentType"] = angle_format.get_component_type(format_id)

    if "channels" not in parsed:
        parsed["channels"] = angle_format.get_channels(format_id)

    if "bits" not in parsed:
        parsed["bits"] = angle_format.get_bits(format_id)

    # Derived values.
    parsed["mipGenerationFunction"] = get_mip_generation_function(parsed)
    parsed["colorReadFunction"] = get_color_read_function(parsed)
    parsed["colorWriteFunction"] = get_color_write_function(parsed)

    for channel in angle_format.kChannels:
        if parsed["bits"] != None and channel in parsed["bits"]:
            parsed[channel] = parsed["bits"][channel]
        else:
            parsed[channel] = "0"

    parsed["namedComponentType"] = get_named_component_type(parsed["componentType"])

    if format_id == "B8G8R8A8_UNORM":
        parsed["fastCopyFunctions"] = "BGRACopyFunctions"

    sum_of_bits = 0
    for channel in angle_format.kChannels:
        sum_of_bits += int(parsed[channel])
    parsed["pixelBytes"] = sum_of_bits / 8
    parsed["isBlock"] = "true" if format_id.endswith("_BLOCK") else "false"

    return format_entry_template.format(**parsed)

def parse_angle_format_table(all_angle, json_data, angle_to_gl):
    table_data = ''
    for format_id in sorted(all_angle):
        if format_id != "NONE":
            format_info = json_data[format_id] if format_id in json_data else {}
            table_data += json_to_table_data(format_id, format_info, angle_to_gl)

    return table_data

def gen_enum_string(all_angle):
    enum_data = '    NONE'
    for format_id in sorted(all_angle):
        if format_id == 'NONE':
            continue
        enum_data += ',\n    ' + format_id
    return enum_data

case_template = """        case {gl_format}:
            return FormatID::{angle_format};
"""

def gen_map_switch_string(gl_to_angle):
    switch_data = '';
    for gl_format in sorted(gl_to_angle.keys()):
        angle_format = gl_to_angle[gl_format]
        switch_data += case_template.format(
            gl_format=gl_format,
            angle_format=angle_format)
    switch_data += "        default:\n"
    switch_data += "            return FormatID::NONE;"
    return switch_data;

gl_to_angle = angle_format.load_forward_table('angle_format_map.json')
angle_to_gl = angle_format.load_inverse_table('angle_format_map.json')
data_source_name = 'angle_format_data.json'
json_data = angle_format.load_json(data_source_name)
all_angle = angle_to_gl.keys()

angle_format_cases = parse_angle_format_table(
    all_angle, json_data, angle_to_gl)
switch_data = gen_map_switch_string(gl_to_angle)
output_cpp = template_autogen_inl.format(
    script_name = sys.argv[0],
    copyright_year = date.today().year,
    angle_format_info_cases = angle_format_cases,
    angle_format_switch = switch_data,
    data_source_name = data_source_name)
with open('Format_table_autogen.cpp', 'wt') as out_file:
    out_file.write(output_cpp)
    out_file.close()

enum_data = gen_enum_string(all_angle)
num_angle_formats = len(all_angle)
output_h = template_autogen_h.format(
    script_name = sys.argv[0],
    copyright_year = date.today().year,
    angle_format_enum = enum_data,
    data_source_name = data_source_name,
    num_angle_formats = num_angle_formats)
with open('FormatID_autogen.inc', 'wt') as out_file:
    out_file.write(output_h)
    out_file.close()
kc3-lang/angle/src/libANGLE/renderer/gen_angle_format_table.py

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kc3-lang/angle /src/libANGLE/renderer/gen_angle_format_table.py
