DeviceInfoGL.cpp
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/****************************************************************************
Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
http://www.cocos2d-x.org
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 "DeviceInfoGL.h"
#include "platform/CCGL.h"
CC_BACKEND_BEGIN
bool DeviceInfoGL::init()
{
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &_maxAttributes);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &_maxTextureSize);
glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &_maxTextureUnits);
_glExtensions = (const char*)glGetString(GL_EXTENSIONS);
return true;
}
const char* DeviceInfoGL::getVendor() const
{
return (const char*)glGetString(GL_VENDOR);
}
const char* DeviceInfoGL::getRenderer() const
{
return (const char*)glGetString(GL_RENDERER);
}
const char* DeviceInfoGL::getVersion() const
{
return (const char*)glGetString(GL_VERSION);
}
const char* DeviceInfoGL::getExtension() const
{
return _glExtensions.c_str();
}
bool DeviceInfoGL::checkForFeatureSupported(FeatureType feature)
{
bool featureSupported = false;
switch (feature)
{
case FeatureType::ETC1:
#ifdef GL_ETC1_RGB8_OES //GL_ETC1_RGB8_OES is not defined in old opengl version
featureSupported = checkForGLExtension("GL_OES_compressed_ETC1_RGB8_texture");
#endif
break;
case FeatureType::S3TC:
#ifdef GL_EXT_texture_compression_s3tc
featureSupported = checkForGLExtension("GL_EXT_texture_compression_s3tc");
#endif
break;
case FeatureType::AMD_COMPRESSED_ATC:
featureSupported = checkForGLExtension("GL_AMD_compressed_ATC_texture");
break;
case FeatureType::PVRTC:
featureSupported = checkForGLExtension("GL_IMG_texture_compression_pvrtc");
break;
case FeatureType::IMG_FORMAT_BGRA8888:
featureSupported = checkForGLExtension("GL_IMG_texture_format_BGRA8888");
break;
case FeatureType::DISCARD_FRAMEBUFFER:
featureSupported = checkForGLExtension("GL_EXT_discard_framebuffer");
break;
case FeatureType::PACKED_DEPTH_STENCIL:
featureSupported = checkForGLExtension("GL_OES_packed_depth_stencil");
break;
case FeatureType::VAO:
#ifdef CC_PLATFORM_PC
featureSupported = checkForGLExtension("vertex_array_object");
#else
featureSupported = checkForGLExtension("GL_OES_vertex_array_object");
#endif
break;
case FeatureType::MAPBUFFER:
featureSupported = checkForGLExtension("GL_OES_mapbuffer");
break;
case FeatureType::DEPTH24:
featureSupported = checkForGLExtension("GL_OES_depth24");
break;
default:
break;
}
return featureSupported;
}
bool DeviceInfoGL::checkForGLExtension(const std::string &searchName) const
{
return _glExtensions.find(searchName) != std::string::npos;
}
CC_BACKEND_END