IPhone OpenGL ES incorrect alpha blending?

Found the problem. I've forgot to set opaque property of CAEAGLLayer of EAGLView to YES.

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I have a problem with incorrect alpha blending results with openGL ES on iPhone. This is my code for creating texture object: glGenTextures(1, &tex_name); glBindTexture(GL_TEXTURE_2D, tex_name); glTextImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_width, tex_height, GL_RGBA, GL_UNSIGNED_BYTE, tex_data); 'tex_data' is loaded from raw RGBA8888 data packed with zlib. It loads as it should, wich i've checked with a debugger.

This is my code for setting up texture before rendering: glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glBindTexture(GL_TEXTURE_2D, tex_name); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); I've uploaded a sample of what I've expected and what I've got here: sample . In the sample most of the texture in the bottom is pitch-black with 70% opacity. However openGL renders it as gray.

This problem affects all of my textures I use blend with. I've tested the code on windows with use of OGLES PVRVFrame and the results are as expected: black is rendered as black. C++ iphone opengl-es alphablending link|improve this question asked Jul 8 '09 at 22:37sfider10329 33% accept rate.

GlBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA) I think this just blends the two instead of blending both against the background. Sorry if I don't understand.

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