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mesa/st: initial attempt at RG support for gallium drivers

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passes all piglit RG tests with softpipe.
This commit is contained in:
Dave Airlie
2010-08-11 19:04:05 +10:00
parent f317713432
commit 71a079fb4e
4 changed files with 93 additions and 1 deletions
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10
src/mesa/state_tracker/st_atom_texture.c
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@@ -52,7 +52,7 @@
*
* \param format PIPE_FORMAT_*.
* \param swizzle Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
* \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA.
* \param depthmode One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA, GL_RED.
*/
static GLuint apply_depthmode(enum pipe_format format,
GLuint swizzle, GLenum depthmode)
@@ -96,6 +96,14 @@ static GLuint apply_depthmode(enum pipe_format format,
else if (swiz[i] < SWIZZLE_W)
swiz[i] = SWIZZLE_ZERO;
break;
case GL_RED:
/* Rewrite reads W to 1, XYZ to X00 */
for (i = 0; i < 4; i++)
if (swiz[i] == SWIZZLE_W)
swiz[i] = SWIZZLE_ONE;
else if (swiz[i] == SWIZZLE_Y || swiz[i] == SWIZZLE_Z)
swiz[i] = SWIZZLE_ZERO;
break;
}
return MAKE_SWIZZLE4(swiz[0], swiz[1], swiz[2], swiz[3]);