glBlendColor — set the blend color
void glBlendColor( | GLfloat red, |
| GLfloat green, | |
| GLfloat blue, | |
GLfloat alpha); |
red, green, blue, alpha specify the components of GL_BLEND_COLOR
The GL_BLEND_COLOR may be used to calculate the source and destination blending factors. If destination framebuffer components use an unsigned normalized fixed-point representation, the constant color components are clamped to the range when computing the blend factors. See glBlendFunc for a complete description of the blending operations. Initially the GL_BLEND_COLOR is set to (0, 0, 0, 0).
glGet with an argument of GL_BLEND_COLOR
| OpenGL ES API Version | |||
|---|---|---|---|
| Function Name | 2.0 | 3.0 | 3.1 |
| glBlendColor | ✔ | ✔ | ✔ |
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