When I draw a gradient fill using OpenGL, the result looks striped, that is, it displays only with the fourth possible color.
The rendering buffer displays all the colors, but not in the actual output.
I am developing an iPhone 3G running iOS4.
Any ideas?
Peter
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GLint redBits, greenBits, blueBits;
glGetIntegerv (GL_RED_BITS, &redBits); // ==> 8
glGetIntegerv (GL_GREEN_BITS, &greenBits); // ==> 8
glGetIntegerv (GL_BLUE_BITS, &blueBits); // ==> 8
glDisable(GL_BLEND);
glDisable(GL_DITHER);
glDisable(GL_FOG);
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_2D);
glShadeModel(GL_SMOOTH);
const GLfloat vertices[] = {
0, 0,
320, 0,
0, 480,
320, 480,
};
const GLubyte colors[] = {
255, 255, 255, 255,
255, 255, 255, 255,
200, 200, 200, 255,
200, 200, 200, 255,
};
glVertexPointer(2, GL_FLOAT, 0, vertices);
glEnableClientState(GL_VERTEX_ARRAY);
glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
glEnableClientState(GL_COLOR_ARRAY);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);