opengl-es-2.0

It seems this should be easy but I'm having a lot of difficulty using part of a texture with a point sprite. I have googled around extensively and turned up various answers but none of these deal with the specific issue I'm having. What I've learned so far: Basics of point sprite drawing How to deal with point sprites rendering as solid squares How to alter orientation of a point sprite How to use multiple textures with a point sprite , getting closer here.. That point sprites + sprite sheets has been done before, but is only possible in OpenGL ES 2.0 (not 1.0) Here is a diagram of what I'm

So, I have an OpenGL ES 2.0 app. It compiles and runs in the iPhone/iPad simulators, on a real iPhone/iPad, and under Windows using Imgtec's emulator libraries (i.e. PVRVframe ). In said app, I have one particular draw call that results in no pixels written to the target, even though all the state I can query looks sensible (viewport, depth test/stencil test/cull/blend off, framebuffer complete etc), and AFAICT I am submitting sensible vertex data. What I'm after at this point is a Pix / GPAD - like tool that will let me step through the scene and review state I cannot directly query from

I'm writing media player framework for Apple TV, using OpenGL ES and ffmpeg. Conversion to RGBA is required for rendering on OpenGL ES, soft convert using swscale is unbearably slow, so using information on the internet I came up with two ideas: using neon (like here ) or using fragment shaders and GL_LUMINANCE and GL_LUMINANCE_ALPHA. As I know almost nothing about OpenGL, the second option still doesn't work :) Can you give me any pointers how to proceed? Thank you in advance. It is most definitely worthwhile learning OpenGL ES2.0 shaders: You can load-balance between the GPU and CPU (e.g.

this is my opengl-es 2.0 code : { for (surfnum=0;surfnum<surftotal;surfnum++){ for (i=0;i<triNum[surfnum];i++){ GLfloat *Vertices[] = { triArray[surfnum][i].normpt1, triArray[surfnum][i].normpt2,triArray[surfnum][i].normpt3}; glGenBuffers(1, &ui32Vbo); glBindBuffer(GL_ARRAY_BUFFER, ui32Vbo); unsigned int uiSize = 3 * (sizeof(GLfloat) * 1); glBufferData(GL_ARRAY_BUFFER, uiSize,*Vertices, GL_STATIC_DRAW); } } } for(int i = 0; i < 80000; ++i) { glClear(GL_COLOR_BUFFER_BIT); int i32Location = glGetUniformLocation(uiProgramObject, "projmatrix"); glUniformMatrix4fv( i32Location, 1, GL_FALSE,

I have an OpenGL ES2.0 app that is working on devices running various Android versions from 2.2 up to 4.1. However I have been told that when running it on a Nexus 7 with Android 4.2 the 3D graphics in the App are all black. The Action Bar and dialogs work fine though. I have tried it on an emulated Nexus 7 with Intel Atom processor, HAX and GPU enabled running 4.2.2 and that works OK. I would have preferred to run the ARM image but that doesn't seem to include Open GL ES2.0 Does anyone have any insight into what might be causing this problem on the Nexus 7 and how to work around it? One