void Texture::set_data(const void* data_ptr)
{
set_mip_data(data_ptr, _size, 0);
CHECK_FOR_GL_ERROR;
if (_params.filter == TexFilter::Mipmapped) {
generate_mipmaps();
}
}
bool CImage::GenerateMipmaps(unsigned int nMipmaps)
{
// Compressed formats should have mipmaps packed in //
if(is_format_compressed(m_pixelFormat))
return false;
// We do not support non-square mipmapping at this time //
if(!is_power_of_2(m_imageWidth, m_imageHeight))
return false;
m_mipMapCount = gmin(get_mipmap_count_from_dim(gmax(gmax(m_imageWidth, m_imageHeight), m_depth)), nMipmaps);
m_pPixels = (unsigned char*)realloc(m_pPixels, GetSizeWithMipmaps());
unsigned char *dest, *src = m_pPixels;
int c = get_channel_count(m_pixelFormat);
int cSize = get_bytes_per_channel(m_pixelFormat);
if(IsCubemap())
{
int dim = m_imageWidth;
for(int i = 1; i < m_mipMapCount; ++i)
{
int sliceSize = dim * dim * c * cSize;
dest = src + 6 * sliceSize;
for(unsigned int s = 0; s < 6; ++s)
{
if(cSize == 1)
generate_mipmaps(src + s * sliceSize, dest + s * sliceSize / 4, dim, dim, 1, c);
else if(cSize == 2)
generate_mipmaps((unsigned short*)(src + s * sliceSize), (unsigned short*)(dest + s * sliceSize / 4), dim, dim, 1, c);
else
generate_mipmaps((float*)(src + s * sliceSize), (float*)(dest + s * sliceSize / 4), dim, dim, 1, c);
}
src = dest;
dim >>= 1;
}
}
else
{
void GL::Texture::setup(const void* data, GLenum type, int samples)
{
assert(_dimensions >= 1 && _dimensions <= 3);
GLenum targets[] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D};
GLenum wrap_enums[] = {GL_TEXTURE_WRAP_S,
GL_TEXTURE_WRAP_T,
GL_TEXTURE_WRAP_R};
_target = targets[_dimensions-1];
if (samples > 0) {
// Multisample textures don't support mipmapping.
assert(_min_filter != GL_NEAREST_MIPMAP_NEAREST);
assert(_min_filter != GL_LINEAR_MIPMAP_NEAREST);
assert(_min_filter != GL_NEAREST_MIPMAP_LINEAR);
assert(_min_filter != GL_LINEAR_MIPMAP_LINEAR);
assert(_dimensions == 2);
if (_dimensions == 2) {
_target = GL_TEXTURE_2D_MULTISAMPLE;
}
}
bind();
if (samples == 0) {
if (FLEXT_EXT_texture_filter_anisotropic) {
glTexParameterf(_target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
gl_config.max_anisotropy());
}
glTexParameteri(_target, GL_TEXTURE_MAG_FILTER, _mag_filter);
glTexParameteri(_target, GL_TEXTURE_MIN_FILTER, _min_filter);
for (int i = 0; i < _dimensions; ++i) {
glTexParameteri(_target, wrap_enums[i], _wrap_method);
}
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
switch (_dimensions) {
case 1:
glTexImage1D(GL_TEXTURE_1D, // target
0, // level
_internal_format, // internalFormat
_width, // size
0, // border
_format, // format
type, // type
data); // pixels
break;
case 2:
if (samples < 1) {
glTexImage2D(GL_TEXTURE_2D, // target
0, // level
_internal_format, // internalFormat
_width,_height, // size
0, // border
_format, // format
type, // type
data); // pixels
} else {
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, // target
samples, // samples
_internal_format, // internalFormat
_width,_height, // size
GL_FALSE); // fixedsamplelocations
}
break;
case 3:
glTexImage3D(GL_TEXTURE_3D, // target
0, // level
_internal_format, // internalFormat
_width,_height,_depth, // size
0, // border
_format, // format
type, // type
data); // pixels
break;
default:
assert(0);
// To keep the compiler quiet..
}
generate_mipmaps();
unbind();
}