magnum/src/Magnum/Implementation/driverSpecific.cpp

/*
    This file is part of Magnum.

    Copyright © 2010, 2011, 2012, 2013, 2014, 2015
              Vladimír Vondruš <mosra@centrum.cz>

    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.
*/

#include "Magnum/Context.h"
#include "Magnum/Extensions.h"
#include "Magnum/Math/Range.h"

namespace Magnum {

auto Context::detectedDriver() -> DetectedDrivers {
    if(_detectedDrivers) return *_detectedDrivers;

    _detectedDrivers = DetectedDrivers{};

    #ifndef MAGNUM_TARGET_GLES
    const std::string vendor = vendorString();

    /* AMD binary desktop drivers */
    if(vendor.find("ATI Technologies Inc.") != std::string::npos)
        return *_detectedDrivers |= DetectedDriver::AMD;

    #ifdef CORRADE_TARGET_WINDOWS
    /* Intel Windows drivers */
    if(vendor.find("Intel") != std::string::npos)
        return *_detectedDrivers |= DetectedDriver::IntelWindows;
    #endif
    #endif

    #ifdef MAGNUM_TARGET_GLES2
    /* OpenGL ES 2.0 implementation using ANGLE. Taken from
       http://stackoverflow.com/a/20149090 */
    {
        Range1Di range;
        glGetIntegerv(GL_ALIASED_LINE_WIDTH_RANGE, range.data());
        if(range.min() == 1 && range.max() == 1)
            return *_detectedDrivers |= DetectedDriver::ProbablyAngle;
    }
    #endif

    return *_detectedDrivers;
}

void Context::setupDriverWorkarounds() {
    #define _setRequiredVersion(extension, version)                           \
        if(_extensionRequiredVersion[Extensions::extension::Index] < Version::version) \
            _extensionRequiredVersion[Extensions::extension::Index] = Version::version

    #ifndef MAGNUM_TARGET_GLES
    /* This extension causes crash in GLSL compiler on AMD linux drivers 13.251 */
    if(detectedDriver() & DetectedDriver::AMD)
        _setRequiredVersion(GL::ARB::explicit_uniform_location, None);

    #ifdef CORRADE_TARGET_WINDOWS
    /* On Windows Intel drivers ARB_shading_language_420pack is exposed in GLSL
       even that the extension (e.g. binding keyword) is not supported */
    if((detectedDriver() & DetectedDriver::IntelWindows) && !isExtensionSupported<Extensions::GL::ARB::shading_language_420pack>())
        _setRequiredVersion(GL::ARB::shading_language_420pack, None);
    #endif

    /* Layout qualifier causes compiler error with GLSL 1.20 on Mesa, GLSL 1.30
       on NVidia and 1.40 on Mac OS X */
    /** @todo Different version on different vendors? */
    _setRequiredVersion(GL::ARB::explicit_attrib_location, GL320);
    _setRequiredVersion(GL::ARB::explicit_uniform_location, GL320);
    _setRequiredVersion(GL::ARB::shading_language_420pack, GL320);
    #endif

    /* Disable extensions not available on NaCl */
    #ifdef CORRADE_TARGET_NACL
    _setRequiredVersion(GL::EXT::multi_draw_arrays, None);
    _setRequiredVersion(GL::EXT::debug_label, None);
    _setRequiredVersion(GL::EXT::debug_marker, None);
    _setRequiredVersion(GL::EXT::disjoint_timer_query, None);
    _setRequiredVersion(GL::EXT::separate_shader_objects, None);
    _setRequiredVersion(GL::EXT::multisampled_render_to_texture, None);
    _setRequiredVersion(GL::EXT::robustness, None);
    _setRequiredVersion(GL::KHR::debug, None);
    _setRequiredVersion(GL::NV::read_buffer_front, None);
    _setRequiredVersion(GL::OES::mapbuffer, None);
    _setRequiredVersion(GL::ANGLE::framebuffer_blit, None);
    _setRequiredVersion(GL::ANGLE::framebuffer_multisample, None);
    _setRequiredVersion(GL::ANGLE::instanced_arrays, None);
    _setRequiredVersion(GL::APPLE::framebuffer_multisample, None);
    _setRequiredVersion(GL::EXT::discard_framebuffer, None);
    _setRequiredVersion(GL::EXT::blend_minmax, None);
    _setRequiredVersion(GL::EXT::texture_storage, None);
    _setRequiredVersion(GL::EXT::map_buffer_range, None);
    _setRequiredVersion(GL::EXT::instanced_arrays, None);
    _setRequiredVersion(GL::EXT::draw_instanced, None);
    _setRequiredVersion(GL::NV::draw_buffers, None);
    _setRequiredVersion(GL::NV::fbo_color_attachments, None); // ??
    _setRequiredVersion(GL::NV::read_buffer, None);
    _setRequiredVersion(GL::NV::draw_instanced, None);
    _setRequiredVersion(GL::NV::framebuffer_blit, None);
    _setRequiredVersion(GL::NV::framebuffer_multisample, None);
    _setRequiredVersion(GL::NV::instanced_arrays, None);
    _setRequiredVersion(GL::OES::texture_3D, None);
    _setRequiredVersion(GL::OES::vertex_array_object, None);
    #endif

    #undef _setRequiredVersion
}

}