// TODO set texture unit upfront
Texture2D::Texture2D(GLsizei width, GLsizei height, GLuint mipmapLevels) {
glEnable(GL_TEXTURE_2D);
m_width = width;
m_height = height;
m_mipmapLevels = 8;
glGenTextures(1, &m_TBO);
bind();
glTexStorage2D(GL_TEXTURE_2D, m_mipmapLevels, GL_RGBA32F, m_width, m_height);
if(m_mipmapLevels > 0) {
setMagFilter(GL_LINEAR_MIPMAP_LINEAR);
setMinFilter(GL_LINEAR_MIPMAP_LINEAR);
} else {
setMagFilter(GL_LINEAR);
setMinFilter(GL_LINEAR);
}
setWrapModeS(GL_REPEAT);
setWrapModeT(GL_REPEAT);
}
SamplerState::SamplerState()
{
memset(this, 0, sizeof(SamplerState));
setMinFilter(GL_NEAREST_MIPMAP_LINEAR);
setMagFilter(GL_LINEAR);
setWrapS(GL_REPEAT);
setWrapT(GL_REPEAT);
setWrapR(GL_REPEAT);
setMaxAnisotropy(1.0f);
setMinLod(-1000.0f);
setMaxLod(1000.0f);
setCompareMode(GL_NONE);
setCompareFunc(GL_LEQUAL);
setSRGBDecode(GL_DECODE_EXT);
}
Sampler::Sampler
( unsigned int wrapModeS
, unsigned int wrapModeT
, unsigned int wrapModeR
, unsigned int minFilter
, unsigned int magFilter )
: id( createGLSampler() )
{
bind( Texture< 0 >::SETUP_UNIT );
setWrapModeS( wrapModeS );
setWrapModeT( wrapModeT );
setWrapModeR( wrapModeR );
setMinFilter( minFilter );
setMagFilter( magFilter );
}
PHRect PHGLTexture2D::loadFromData(uint8_t * buf, size_t w, size_t h, size_t bw, size_t bh, enum pixelFormat fmt, bool aa)
{
if (gm->hasCapability(PHGLCapabilityAppleLimitedNPOT))
{
bool pots = ((w & ~(w ^ (w-1))) == 0) && ((h & ~(h ^ (h-1))) == 0);
if (!pots)
{
aa = false;
}
}
bind_begin;
setWrapS(clampToEdge);
setWrapT(clampToEdge);
setMinFilter(aa?linearMipmapNearest:linear);
setMagFilter(linear);
setData(buf, bw, bh, fmt);
bind_end;
return PHRect(0, 0, w/float(bw), h/float(bh));
}
bool Texture2D::generateTextureHandle()
{
if (d->textureId > 0) {
m_error = "Refusing to overwrite existing texture handle.";
return false;
}
glGenTextures(1, &d->textureId);
if (d->textureId == 0) {
m_error = "Error generating texture handle.";
return false;
}
// Set up defaults to match the documentation:
setMinFilter(Linear);
setMagFilter(Linear);
setWrappingS(Repeat);
setWrappingT(Repeat);
return true;
}
