ExtensionBehavior.cpp

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Author : Austin Eng
Date : 2018-10-09 15:27:32
Hash : 7cf9cd24
Message : Add flags to shader translator to emulate gl_DrawID Adds support for translating gl_DrawID for implementation of GL_ANGLE_multi_draw. Currently the change only supports and allows emulation of the draw id using a uniform variable named `gl_DrawID`. This uniform is mapped in the translated shader to a hashed name that does not use the gl_ namespace Bug: chromium:890539 Change-Id: I08a246ca911e88e733ccdf22f1ed69dcae948e05 Reviewed-on: https://chromium-review.googlesource.com/c/1271957 Commit-Queue: Austin Eng <enga@chromium.org> Reviewed-by: Kai Ninomiya <kainino@chromium.org>

src/compiler/translator/ExtensionBehavior.cpp

//
// Copyright (c) 2017 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.
//
// ExtensionBehavior.cpp: Extension name enumeration and data structures for storing extension
// behavior.

#include "compiler/translator/ExtensionBehavior.h"

#include "common/debug.h"

#include <string.h>

#define LIST_EXTENSIONS(OP)                      \
    OP(ARB_texture_rectangle)                    \
    OP(ANGLE_texture_multisample)                \
    OP(ARM_shader_framebuffer_fetch)             \
    OP(EXT_blend_func_extended)                  \
    OP(EXT_draw_buffers)                         \
    OP(EXT_frag_depth)                           \
    OP(EXT_geometry_shader)                      \
    OP(EXT_shader_framebuffer_fetch)             \
    OP(EXT_shader_texture_lod)                   \
    OP(EXT_YUV_target)                           \
    OP(NV_EGL_stream_consumer_external)          \
    OP(NV_shader_framebuffer_fetch)              \
    OP(OES_EGL_image_external)                   \
    OP(OES_EGL_image_external_essl3)             \
    OP(OES_standard_derivatives)                 \
    OP(OES_texture_storage_multisample_2d_array) \
    OP(OVR_multiview)                            \
    OP(ANGLE_multi_draw)

namespace sh
{

#define RETURN_EXTENSION_NAME_CASE(ext) \
    case TExtension::ext:               \
        return "GL_" #ext;

const char *GetExtensionNameString(TExtension extension)
{
    switch (extension)
    {
        LIST_EXTENSIONS(RETURN_EXTENSION_NAME_CASE)
        default:
            UNREACHABLE();
            return "";
    }
}

#define RETURN_EXTENSION_IF_NAME_MATCHES(ext)  \
    if (strcmp(extWithoutGLPrefix, #ext) == 0) \
    {                                          \
        return TExtension::ext;                \
    }

TExtension GetExtensionByName(const char *extension)
{
    // If first characters of the extension don't equal "GL_", early out.
    if (strncmp(extension, "GL_", 3) != 0)
    {
        return TExtension::UNDEFINED;
    }
    const char *extWithoutGLPrefix = extension + 3;

    LIST_EXTENSIONS(RETURN_EXTENSION_IF_NAME_MATCHES)

    return TExtension::UNDEFINED;
}

const char *GetBehaviorString(TBehavior b)
{
    switch (b)
    {
        case EBhRequire:
            return "require";
        case EBhEnable:
            return "enable";
        case EBhWarn:
            return "warn";
        case EBhDisable:
            return "disable";
        default:
            return nullptr;
    }
}

bool IsExtensionEnabled(const TExtensionBehavior &extBehavior, TExtension extension)
{
    ASSERT(extension != TExtension::UNDEFINED);
    auto iter = extBehavior.find(extension);
    return iter != extBehavior.end() &&
           (iter->second == EBhEnable || iter->second == EBhRequire || iter->second == EBhWarn);
}

}  // namespace sh

kc3-lang/angle/src/compiler/translator/ExtensionBehavior.cpp

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kc3-lang/angle /src/compiler/translator/ExtensionBehavior.cpp