Part of the Khronos Group
OpenGL.org

The Industry's Foundation for High Performance Graphics

from games to virtual reality, mobile phones to supercomputers

Results 1 to 7 of 7

Thread: glBlendEquationSeparateRGBA

Threaded View

  1. #1
    Advanced Member Frequent Contributor
    Join Date
    Apr 2009
    Posts
    590

    glBlendFuncSeparateRGBA

    Currently, the alpha in color blending has far more flexible roles that the other channels, RGB. This is actually 2 parts:

    First part, a new function:

    Code :
    glBlendFuncSeparateRGBA(
    GLenum red_src_factor, GLenum red_dst_factor, 
    GLenum green_src_factor, GLenum green_dst_factor, 
    GLenum blue_src_factor, GLenum blue_dst_factor, 
    GLenum alpha_src_factor, GLenum alpha_dst_factor)

    which specifies the factors for blending separately for each color channel.

    In addition, a smash of new enumerations for using each of the channels, separately:

    Code :
    GL_SRC_RED, 
    GL_SRC1_RED,
    GL_DST_RED,
    GL_ONE_MINUS_SRC_RED,
    GL_ONE_MINUS_SRC1_RED,
    GL_ONE_MINUS_DST_RED,
     
    and similar ones for GREEN and BLUE.

    A logical convention for the using current non-alpha factors with the new function would be that to just use the component, for example passing GL_SRC for red_src_factor or red_dest_factor would be same as GL_SRC_RED, and so on.

    Naturally this extends to glBlendFunci as well.
    Last edited by kRogue; 05-13-2013 at 05:10 PM. Reason: Fix name mix up pointed out by Alfhonse and also, as pointed out by Alfhonse, mention glBlendfunci as well

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •