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Questions - opengl-es-3.0

Passing a GLTexture as an input to texImage2D in OpenGL ES 2.0

I am trying to build a texture packer, where multiple (possibly NPOT) textures can be packed into one mega Power-Of-Two Texture for better performance and better min / mag filtering. Is it possible to...
test-img

Georgi B. Nikolov

opengl-es

opengl-es-3.0

Votes: 0

Answers: 1

Latest Answer

Is it possible to pass a GLTexture to a tex(Sub)Image2D call in OpenGL ES 2.0? No. If you can't do it in software, the other option is to do it on the GPU as a render-to-texture operation.
test-img

solidpixel

OpenGLES 3.0 Cannot render to a texture larger than the screen size

I have made an image below to indicate my problem. I render my scene to an offscreen framebuffer with a texture the size of the screen. I then render said texture to a screen-filling quad. This produc...
test-img

JustAGuyWithALoaf

opengl-es

textures

framebuffer

opengl-es-3.0

Votes: 0

Answers: 1

Latest Answer

I found that I actually used an AABB somewhere else in the code to determine what to render; and this AABB was computed from the "small viewport's size". Stupid mistake.
test-img

JustAGuyWithALoaf

Android OpenGl ES 3.0 update VBO data on button click?

Is there any way to draw mesh dynamically. like on press of a button send new float array to openGL ES 30 VBO. currently i draw both rectangle and triangle STATIC in Native C++ they are visible, But w...
test-img

Kouki

android

c++

opengl-es-3.0

Votes: 0

Answers: 0

Convert Pixels Buffer type from 1555 to 5551 (C++, OpenGL ES)

I'm having a problem while converting OpenGL video plugin to support GLES 3.0 So far everything went well, except glTexSubImage2D the original code uses GL_UNSIGNED_SHORT_1_5_5_5_REV as pixels type wh...
test-img

Bashar Astifan

c++

opengl-es

opengl-es-3.0

Votes: 0

Answers: 1

Latest Answer

This should be what you're looking for. uint16_t Convert1555To5551(uint16_t pixel) { // extract rgba from 1555 (1 bit alpha, 5 bits blue, 5 bits green, 5 bits red) uint16_t a = pixel >>...
test-img

rdtsc

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