Texture::Texture(const Image& image, MipmapGeneration mipmapGeneration, TextureFiltering filtering, bool clamp, const GLInfo& glInfo)
{
glGenTextures(1, &id);
Bind();
bool linearFiltering = (filtering == TextureFiltering::Linear);
GLint minFilterParam;
if (mipmapGeneration == MipmapGeneration::None)
{
minFilterParam = linearFiltering ? GL_LINEAR : GL_NEAREST;
}
else
{
minFilterParam = linearFiltering ? GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_LINEAR;
}
GLint magFilterParam = linearFiltering ? GL_LINEAR : GL_NEAREST;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilterParam);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilterParam);
GenerateMipmaps(image, mipmapGeneration, glInfo);
bool doClamp = (clamp && (GLEW_VERSION_1_2 || glewIsExtensionSupported("GL_EXT_texture_edge_clamp")));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, doClamp ? GL_CLAMP_TO_EDGE : GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, doClamp ? GL_CLAMP_TO_EDGE : GL_REPEAT);
}
void Texture::GenerateMipmaps(const Image& image, MipmapGeneration mipmapGeneration, const GLInfo& glInfo) const
{
Texture::SetUnpackAlignmentForPixelComponents(image.NumPixelComponents());
Texture::SendTextureData(image, 0);
if (mipmapGeneration == MipmapGeneration::Manual)
{
GenerateManualMipmaps(image);
return;
}
if (mipmapGeneration == MipmapGeneration::GLGenerateMipMap)
{
GLInfo::Vendor vendor = glInfo.GetVendor();
if ((vendor == GLInfo::Vendor::Microsoft) || (vendor == GLInfo::Vendor::Unknown))
{
GenerateMipmapsLegacy(image);
return;
}
bool vendorIsATI = (vendor == GLInfo::Vendor::ATI);
if (GLEW_VERSION_3_0)
{
if (vendorIsATI)
{
glEnable(GL_TEXTURE_2D);
}
glGenerateMipmap(GL_TEXTURE_2D);
return;
}
if (GLEW_VERSION_2_1 && glewIsExtensionSupported("GL_EXT_framebuffer_object"))
{
if (vendorIsATI)
{
glEnable(GL_TEXTURE_2D);
}
glGenerateMipmapEXT(GL_TEXTURE_2D);
return;
}
}
if (mipmapGeneration == MipmapGeneration::None)
{
return;
}
GenerateMipmapsLegacy(image);
}
void OpenGLRenderManager::initialise(OpenGLImageLoader* _loader)
{
MYGUI_PLATFORM_ASSERT(!mIsInitialise, getClassTypeName() << " initialised twice");
MYGUI_PLATFORM_LOG(Info, "* Initialise: " << getClassTypeName());
mVertexFormat = VertexColourType::ColourABGR;
mUpdate = false;
mImageLoader = _loader;
glewInit();
mPboIsSupported = glewIsExtensionSupported("GL_EXT_pixel_buffer_object") != 0;
MYGUI_PLATFORM_LOG(Info, getClassTypeName() << " successfully initialized");
mIsInitialise = true;
}
bool ceDeviceGL20::CheckExtension (const char* extension)
{
return glewIsExtensionSupported (extension);
}
