GLExtensions.hpp

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/*
 * Author: Sven Gothel <sgothel@jausoft.com>
 * Copyright Gothel Software e.K.
 *
 * SPDX-License-Identifier: MIT
 *
 * This Source Code Form is subject to the terms of the MIT License
 * If a copy of the MIT was not distributed with this file,
 * you can obtain one at https://opensource.org/license/mit/.
 */
#ifndef GAMP_RENDER_GL_GLEXTENSIONS_HPP_
#define GAMP_RENDER_GL_GLEXTENSIONS_HPP_
 
#include <string_view>
 
#include <gamp/render/gl/GLHeader.hpp>
 
namespace gamp::render::gl::texture {
    /** \addtogroup Gamp_GL
     *
     *  @{
     */
 
    /**
     * Class holding OpenGL extension strings, commonly used by Gamp's implementation.
     */
    class GLExtensions {
      public:
        constexpr static std::string_view VERSION_1_2 = "GL_VERSION_1_2";
        constexpr static std::string_view VERSION_1_4 = "GL_VERSION_1_4";
        constexpr static std::string_view VERSION_1_5 = "GL_VERSION_1_5";
        constexpr static std::string_view VERSION_2_0 = "GL_VERSION_2_0";
 
        constexpr static std::string_view GL_KHR_debug_     = "GL_KHR_debug";
        constexpr static std::string_view ARB_debug_output = "GL_ARB_debug_output";
        constexpr static std::string_view AMD_debug_output = "GL_AMD_debug_output";
 
        constexpr static std::string_view ARB_framebuffer_object      = "GL_ARB_framebuffer_object";
        constexpr static std::string_view OES_framebuffer_object      = "GL_OES_framebuffer_object";
        constexpr static std::string_view EXT_framebuffer_object      = "GL_EXT_framebuffer_object";
        constexpr static std::string_view EXT_framebuffer_blit        = "GL_EXT_framebuffer_blit";
        constexpr static std::string_view EXT_framebuffer_multisample = "GL_EXT_framebuffer_multisample";
        constexpr static std::string_view EXT_packed_depth_stencil    = "GL_EXT_packed_depth_stencil";
        constexpr static std::string_view OES_depth24                 = "GL_OES_depth24";
        constexpr static std::string_view OES_depth32                 = "GL_OES_depth32";
        constexpr static std::string_view OES_packed_depth_stencil    = "GL_OES_packed_depth_stencil";
        constexpr static std::string_view NV_fbo_color_attachments    = "GL_NV_fbo_color_attachments";
 
        constexpr static std::string_view ARB_ES2_compatibility   = "GL_ARB_ES2_compatibility";
        constexpr static std::string_view ARB_ES3_compatibility   = "GL_ARB_ES3_compatibility";
        constexpr static std::string_view ARB_ES3_1_compatibility = "GL_ARB_ES3_1_compatibility";
        constexpr static std::string_view ARB_ES3_2_compatibility = "GL_ARB_ES3_2_compatibility";
 
        constexpr static std::string_view EXT_abgr           = "GL_EXT_abgr";
        constexpr static std::string_view OES_rgb8_rgba8     = "GL_OES_rgb8_rgba8";
        constexpr static std::string_view OES_stencil1       = "GL_OES_stencil1";
        constexpr static std::string_view OES_stencil4       = "GL_OES_stencil4";
        constexpr static std::string_view OES_stencil8       = "GL_OES_stencil8";
        constexpr static std::string_view APPLE_float_pixels = "GL_APPLE_float_pixels";
 
        constexpr static std::string_view ARB_texture_non_power_of_two = "GL_ARB_texture_non_power_of_two";
        constexpr static std::string_view ARB_texture_rectangle        = "GL_ARB_texture_rectangle";
        constexpr static std::string_view EXT_texture_rectangle        = "GL_EXT_texture_rectangle";
        constexpr static std::string_view NV_texture_rectangle         = "GL_NV_texture_rectangle";
        constexpr static std::string_view EXT_texture_format_BGRA8888  = "GL_EXT_texture_format_BGRA8888";
        constexpr static std::string_view IMG_texture_format_BGRA8888  = "GL_IMG_texture_format_BGRA8888";
        constexpr static std::string_view EXT_texture_compression_s3tc = "GL_EXT_texture_compression_s3tc";
        constexpr static std::string_view NV_texture_compression_vtc   = "GL_NV_texture_compression_vtc";
        constexpr static std::string_view SGIS_generate_mipmap         = "GL_SGIS_generate_mipmap";
        constexpr static std::string_view OES_read_format              = "GL_OES_read_format";
        constexpr static std::string_view OES_single_precision         = "GL_OES_single_precision";
        constexpr static std::string_view OES_EGL_image_external       = "GL_OES_EGL_image_external";
        /** Required to be requested for OpenGL ES 2.0, <i>not</i> ES 3.0! */
        constexpr static std::string_view OES_standard_derivatives     = "GL_OES_standard_derivatives";
 
        constexpr static std::string_view ARB_gpu_shader_fp64  = "GL_ARB_gpu_shader_fp64";
        constexpr static std::string_view ARB_shader_objects   = "GL_ARB_shader_objects";
        constexpr static std::string_view ARB_geometry_shader4 = "GL_ARB_geometry_shader4";
 
        //
        // Aliased GLX/WGL/.. extensions
        //
 
        constexpr static std::string_view ARB_pixel_format = "GL_ARB_pixel_format";
        constexpr static std::string_view ARB_pbuffer      = "GL_ARB_pbuffer";
    };
 
    /**@}*/
 
}  // namespace gamp::render::gl
 
#endif /* GAMP_RENDER_GL_GLEXTENSIONS_HPP_ */