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Showing content from https://www.khronos.org/opengles/sdk/docs/man3/html/glBlendColor.xhtml below:

OpenGL ES 3 Reference Pages

Name

glBlendColor — set the blend color

C Specification void glBlendColor( GLfloat red,   GLfloat green,   GLfloat blue,   GLfloat alpha);

 

Parameters
red, green, blue, alpha

specify the components of GL_BLEND_COLOR

Description

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 0 1 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).

Associated Gets

glGet with an argument of GL_BLEND_COLOR

API Version Support OpenGL ES API Version Function Name 2.0 3.0 glBlendColor ✔ ✔

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