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. The color components are clamped to the range before being stored. See glBlendFunc for a complete description of the blending operations. Initially the GL_BLEND_COLOR is set to (0, 0, 0, 0).
The type of the red, green, blue, and alpha parameters was changed from GLclampf to GLfloat. This change is transparent to user code and is described in detail on the removedTypes page.
glGet with an argument of GL_BLEND_COLOR
| OpenGL Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glBlendColor | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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