void MipMapGenerator::generateMipMapCPU (Pixmap::ptr pixmap,int textureWidth,int textureHeight,bool disposePixmap) {
Gdx::gl->glTexImage2D(GL_TEXTURE_2D, 0, pixmap->getGLInternalFormat(), pixmap->getWidth(), pixmap->getHeight(), 0,
pixmap->getGLFormat(), pixmap->getGLType(), pixmap->getPixels());
if ((Gdx::gl20 == NULL) && textureWidth != textureHeight) {
throw std::runtime_error("texture width and height must be square when using mipmapping.");
}
int width = pixmap->getWidth() / 2;
int height = pixmap->getHeight() / 2;
int level = 1;
while (width > 0 && height > 0) {
Pixmap::ptr tmp(Pixmap::newFromRect(width, height, pixmap->getFormat(), pixmap->getType()));
tmp->drawPixmap(*pixmap, 0, 0, pixmap->getWidth(), pixmap->getHeight(), 0, 0, width, height);
if (level > 1 || disposePixmap) pixmap->dispose();
pixmap.swap(tmp);
Gdx::gl->glTexImage2D(GL_TEXTURE_2D, level, pixmap->getGLInternalFormat(), pixmap->getWidth(), pixmap->getHeight(), 0,
pixmap->getGLFormat(), pixmap->getGLType(), pixmap->getPixels());
width = pixmap->getWidth() / 2;
height = pixmap->getHeight() / 2;
level++;
}
pixmap->dispose();
}
PixmapTextureData::PixmapTextureData(Pixmap::ptr _pixmap,
const Pixmap::Format* format,
bool useMipMaps, bool disposePixmap)
: pixmap(_pixmap),
format(format == NULL ? _pixmap->getFormat() : *format),
_useMipMaps(useMipMaps),
_disposePixmap(disposePixmap)
{
}
