swizzle = swiz;
}
+unsigned Texture::count_levels(unsigned size)
+{
+ unsigned n = 0;
+ for(; size; size>>=1, ++n) ;
+ return n;
+}
+
+void Texture::stage_pixels(void *staging, const void *data, size_t count)
+{
+ if(swizzle==RGBA_TO_RGB)
+ {
+ const uint32_t *src = static_cast<const uint32_t *>(data);
+ uint32_t *dst = static_cast<uint32_t *>(staging);
+ size_t i = 0;
+ for(; i+3<count; i+=4)
+ {
+ dst[0] = src[0]|0xFF000000;
+ dst[1] = (src[0]>>24)|(src[1]<<8)|0xFF000000;
+ dst[2] = (src[1]>>16)|(src[2]<<16)|0xFF000000;
+ dst[3] = (src[2]>>8)|0xFF000000;
+ src += 3;
+ dst += 4;
+ }
+
+ if(i<count)
+ {
+ const uint8_t *src_bytes = reinterpret_cast<const uint8_t *>(src);
+ for(; i<count; ++i)
+ {
+ *dst++ = src_bytes[0]|(src_bytes[1]<<8)|(src_bytes[2]<<16)|0xFF000000;
+ src_bytes += 3;
+ }
+ }
+ }
+ else
+ {
+ const char *src = static_cast<const char *>(data);
+ size_t data_size = count*get_pixel_size(storage_fmt);
+ copy(src, src+data_size, static_cast<char *>(staging));
+ }
+}
+
void Texture::load_image(const string &fn, unsigned lv)
{
Graphics::Image img;