textures

I am rendering SVG using Cairo. The Cairo output format is ARGB. Then I put rendered image in a SDL_Surface so I can use it as a openGL texture. The rendered image was looking just fine when I use directly the SDL_Surface. But I had to use the surface as a texture in openGL because I needed some openGL function. The problem is, that all the color are flipped. OpenGL use RGBA and not ARGB. I was wondering if anybody could help me converting a SDL_Surface ARGB to RGBA. Usefull information: I used this tutorial to render my SVG. http://tuxpaint.org/presentations/sdl_svg_svgopen2009_kendrick.pdf

When I try to use mipmap filtering in LibGDX, none of the images appear. I'm new to LibGDX, and I have a simple 2d scene with three rotating, scaled circles. In order to anti-alias them, I wanted to use linear filtering. For advice, I looked to this article ,which said that, for heavily scaled images, a mipmap can be used to improve speed or quality. The first unexpected appearance was that, despite the fact that all of my images were scaled down, I would only see a linear filter if the magFilter was linear. In other words: This code will show a linear filter for minified images: parentTexture

I recently got three.js example from the official site working with my collada objects (.dae) using the ColladaLoader.js . Now my question is, how do i change the loaded collada object color attribute and add a custom texture?? I tried adding the texture with no luck yet. Here is my code (slightly changed from the original example): function load_model(el) { if ( ! Detector.webgl ) Detector.addGetWebGLMessage(); var container, stats; var camera, scene, renderer, objects; var particleLight, pointLight; var dae, skin; var loader = new THREE.ColladaLoader(); loader.options.convertUpAxis = true;

How can I make a text with texture instead of text color or gradient(for example png file)? Something like this . I understand the logic, that I should make text color transparency and put under the text bitmap. I think I can't achive this with a Textview . And I don't know how to do it with a canvas or OpenGL. Any ideas please? Here's a way of doing it using PorterDuffXfermode . public class MainActivity extends Activity { private EditText mEditText; private ImageView mImageView; private Bitmap mTexture; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate

I got a segfault when I tried to load a 771x768 image. Tried with a 24x24 and 768x768 image and they worked, no problem. Is this expected? Why wouldn't it just fail gracefully with a GL Error? The segmentation fault occurs in the glTexImage2D call. I am loading a PPM binary file so it is packed 24 bits per pixel. This odd number combined with an odd dimension probably produces a not-4-byte (or even 2-byte) aligned structure (and referencing outside of my exactly enough allocated buffer may be the cause of the error but gdb does not show me a memory address (which I could use to find out if