Mesa (master): u_format/rgtc: fix alpha values in returned texels.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 0c6ee788f225e978dab3c78e18b1cf26e37edfbd
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0c6ee788f225e978dab3c78e18b1cf26e37edfbd

Author: Dave Airlie <airlied at gmail.com>
Date:   Fri Dec 30 20:29:08 2011 +0000

u_format/rgtc: fix alpha values in returned texels.

This fixes fbo-generatemipmap-formats GL_EXT_texture_compression_rgtc
on llvmpipe.

Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/gallium/auxiliary/util/u_format_rgtc.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_format_rgtc.c b/src/gallium/auxiliary/util/u_format_rgtc.c
index 2371bab..ff04e37 100644
--- a/src/gallium/auxiliary/util/u_format_rgtc.c
+++ b/src/gallium/auxiliary/util/u_format_rgtc.c
@@ -42,6 +42,9 @@ void
 util_format_rgtc1_unorm_fetch_rgba_8unorm(uint8_t *dst, const uint8_t *src, unsigned i, unsigned j)
 {
    u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 1);
+   dst[1] = 0;
+   dst[2] = 0;
+   dst[3] = 255;
 }
 
 void
@@ -58,6 +61,9 @@ util_format_rgtc1_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride
             for(i = 0; i < bw; ++i) {
                uint8_t *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*comps;
 	       u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 1);
+	       dst[1] = 0;
+	       dst[2] = 0;
+	       dst[3] = 255;
 	    }
 	 }
 	 src += block_size;
@@ -229,6 +235,8 @@ util_format_rgtc2_unorm_fetch_rgba_8unorm(uint8_t *dst, const uint8_t *src, unsi
 {
    u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 2);
    u_format_unsigned_fetch_texel_rgtc(0, src + 8, i, j, dst + 1, 2);
+   dst[2] = 0;
+   dst[3] = 255;
 }
 
 void
@@ -246,7 +254,8 @@ util_format_rgtc2_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride
                uint8_t *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*comps;
 	       u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 2);
 	       u_format_unsigned_fetch_texel_rgtc(0, src + 8, i, j, dst + 1, 2);
-
+	       dst[2] = 0;
+	       dst[3] = 255;
 	    }
 	 }
 	 src += block_size;