本文整理汇总了C++中Sampler::doComparison方法的典型用法代码示例。如果您正苦于以下问题：C++ Sampler::doComparison方法的具体用法？C++ Sampler::doComparison怎么用？C++ Sampler::doComparison使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Sampler的用法示例。
在下文中一共展示了Sampler::doComparison方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: syncSampler
void GLBackend::syncSampler(const Sampler& sampler, Texture::Type type, GLTexture* object) {
if (!object) return;
if (!object->_texture) return;
class GLFilterMode {
public:
GLint minFilter;
GLint magFilter;
};
static const GLFilterMode filterModes[] = {
{GL_NEAREST, GL_NEAREST}, //FILTER_MIN_MAG_POINT,
{GL_NEAREST, GL_LINEAR}, //FILTER_MIN_POINT_MAG_LINEAR,
{GL_LINEAR, GL_NEAREST}, //FILTER_MIN_LINEAR_MAG_POINT,
{GL_LINEAR, GL_LINEAR}, //FILTER_MIN_MAG_LINEAR,
{GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST}, //FILTER_MIN_MAG_MIP_POINT,
{GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST}, //FILTER_MIN_MAG_MIP_POINT,
{GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST}, //FILTER_MIN_MAG_POINT_MIP_LINEAR,
{GL_NEAREST_MIPMAP_NEAREST, GL_LINEAR}, //FILTER_MIN_POINT_MAG_LINEAR_MIP_POINT,
{GL_NEAREST_MIPMAP_LINEAR, GL_LINEAR}, //FILTER_MIN_POINT_MAG_MIP_LINEAR,
{GL_LINEAR_MIPMAP_NEAREST, GL_NEAREST}, //FILTER_MIN_LINEAR_MAG_MIP_POINT,
{GL_LINEAR_MIPMAP_LINEAR, GL_NEAREST}, //FILTER_MIN_LINEAR_MAG_POINT_MIP_LINEAR,
{GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR}, //FILTER_MIN_MAG_LINEAR_MIP_POINT,
{GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}, //FILTER_MIN_MAG_MIP_LINEAR,
{GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR} //FILTER_ANISOTROPIC,
};
auto fm = filterModes[sampler.getFilter()];
glTexParameteri(object->_target, GL_TEXTURE_MIN_FILTER, fm.minFilter);
glTexParameteri(object->_target, GL_TEXTURE_MAG_FILTER, fm.magFilter);
static const GLenum comparisonFuncs[] = {
GL_NEVER,
GL_LESS,
GL_EQUAL,
GL_LEQUAL,
GL_GREATER,
GL_NOTEQUAL,
GL_GEQUAL,
GL_ALWAYS };
if (sampler.doComparison()) {
glTexParameteri(object->_target, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
glTexParameteri(object->_target, GL_TEXTURE_COMPARE_FUNC, comparisonFuncs[sampler.getComparisonFunction()]);
} else {
glTexParameteri(object->_target, GL_TEXTURE_COMPARE_MODE, GL_NONE);
}
static const GLenum wrapModes[] = {
GL_REPEAT, // WRAP_REPEAT,
GL_MIRRORED_REPEAT, // WRAP_MIRROR,
GL_CLAMP_TO_EDGE, // WRAP_CLAMP,
GL_CLAMP_TO_BORDER, // WRAP_BORDER,
GL_MIRROR_CLAMP_TO_EDGE_EXT }; // WRAP_MIRROR_ONCE,
glTexParameteri(object->_target, GL_TEXTURE_WRAP_S, wrapModes[sampler.getWrapModeU()]);
glTexParameteri(object->_target, GL_TEXTURE_WRAP_T, wrapModes[sampler.getWrapModeV()]);
glTexParameteri(object->_target, GL_TEXTURE_WRAP_R, wrapModes[sampler.getWrapModeW()]);
glTexParameterfv(object->_target, GL_TEXTURE_BORDER_COLOR, (const float*) &sampler.getBorderColor());
glTexParameteri(object->_target, GL_TEXTURE_BASE_LEVEL, sampler.getMipOffset());
glTexParameterf(object->_target, GL_TEXTURE_MIN_LOD, (float) sampler.getMinMip());
glTexParameterf(object->_target, GL_TEXTURE_MAX_LOD, (sampler.getMaxMip() == Sampler::MAX_MIP_LEVEL ? 1000.f : sampler.getMaxMip()));
glTexParameterf(object->_target, GL_TEXTURE_MAX_ANISOTROPY_EXT, sampler.getMaxAnisotropy());
}