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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>glBlendColorEXT</STRONG> - set the blend color <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG> void <STRONG>glBlendColorEXT</STRONG>( GLclampf <EM>red</EM>, GLclampf <EM>green</EM>, GLclampf <EM>blue</EM>, GLclampf <EM>alpha</EM> ) <STRONG>PARAMETERS</STRONG> <STRONG>GL_BLEND_COLOR_EXT</STRONG> <EM>red</EM>, <EM>green</EM>, <EM>blue</EM>, <EM>alpha</EM> specify the components of <STRONG>DESCRIPTION</STRONG> The <STRONG>GL_BLEND_COLOR_EXT</STRONG> may be used to calculate the source and destination blending factors. See <STRONG>glBlendFunc</STRONG> for a complete description of the blending operations. Initially the <STRONG>GL_BLEND_COLOR_EXT</STRONG> is set to (0,0,0,0). <STRONG>NOTES</STRONG> <STRONG>glBlendColorEXT</STRONG> is part of the <STRONG>EXT_blend_color</STRONG> extension, not part of the core GL command set. If <STRONG>GL_EXT_blend_color</STRONG> is included in the string returned by <STRONG>glGetString</STRONG>, when called with argument <STRONG>GL_EXTENSIONS</STRONG>, extension <STRONG>EXT_blend_color</STRONG> is supported by the connection. <STRONG>ERRORS</STRONG> <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glBlendColorEXT</STRONG> is executed between the execution of <STRONG>glBegin</STRONG> and the corresponding execution of <STRONG>glEnd</STRONG>. <STRONG>ASSOCIATED</STRONG> <STRONG>GETS</STRONG> <STRONG>glGet</STRONG> with an argument of <STRONG>GL_BLEND_COLOR_EXT</STRONG>. <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>glBlendFunc</STRONG>, <STRONG>glGetString</STRONG>.</PRE></BODY></HTML>⌨️ 快捷键说明
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