Hi, I have one problem.
In description of void glClear(GLbitfield mask); I have read this “Masking operations, such as glColorMask() and glIndexMask(), are also effective”. So I do this:
glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_TRUE); glClearColor(0,0,0,0.5); // unsigned byte (0,0,0,127) right? glClear(GL_COLOR_BUFFER_BIT); glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE); glCopyTexImage2D(GL_TEXTURE_2D,0,GL_RGBA,0,0,WindowWidth,WindowHeight,0); // my window is 1024x768 glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, pTextureData); // its rectangular texture, same resolution 1024x768, belive me :)
And then I try to look alpha component, for example, pTextureData its not equal to 127. Help me plz?