diff options
Diffstat (limited to 'src/mesa/swrast/s_texture.c')
| -rw-r--r-- | src/mesa/swrast/s_texture.c | 46 |
1 files changed, 23 insertions, 23 deletions
diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c index 73e1b6718d..55c5277fd3 100644 --- a/src/mesa/swrast/s_texture.c +++ b/src/mesa/swrast/s_texture.c @@ -1,4 +1,4 @@ -/* $Id: s_texture.c,v 1.21 2001/03/28 20:40:52 gareth Exp $ */ +/* $Id: s_texture.c,v 1.22 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -320,10 +320,10 @@ sample_1d_linear(GLcontext *ctx, } { - const GLfloat a = FRAC(u); + const GLfloat a = FRAC(u + 1.0F); /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w0 = IROUND((1.0F-a) * WEIGHT_SCALE); - const GLint w1 = IROUND( a * WEIGHT_SCALE); + const GLint w0 = IROUND_POS((1.0F-a) * WEIGHT_SCALE); + const GLint w1 = IROUND_POS( a * WEIGHT_SCALE); GLchan t0[4], t1[4]; /* texels */ @@ -612,13 +612,13 @@ sample_2d_linear(GLcontext *ctx, } { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); + const GLfloat a = FRAC(u + 1.0F); /* add one in case u is just below 0 */ + const GLfloat b = FRAC(v + 1.0F); /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w00 = IROUND((1.0F-a) * (1.0F-b) * WEIGHT_SCALE); - const GLint w10 = IROUND( a * (1.0F-b) * WEIGHT_SCALE); - const GLint w01 = IROUND((1.0F-a) * b * WEIGHT_SCALE); - const GLint w11 = IROUND( a * b * WEIGHT_SCALE); + const GLint w00 = IROUND_POS((1.0F-a) * (1.0F-b) * WEIGHT_SCALE); + const GLint w10 = IROUND_POS( a * (1.0F-b) * WEIGHT_SCALE); + const GLint w01 = IROUND_POS((1.0F-a) * b * WEIGHT_SCALE); + const GLint w11 = IROUND_POS( a * b * WEIGHT_SCALE); GLchan t00[4]; GLchan t10[4]; GLchan t01[4]; @@ -1032,18 +1032,18 @@ sample_3d_linear(GLcontext *ctx, } { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); - const GLfloat c = FRAC(w); + const GLfloat a = FRAC(u + 1.0F); + const GLfloat b = FRAC(v + 1.0F); + const GLfloat c = FRAC(w + 1.0F); /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - GLint w000 = IROUND((1.0F-a) * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); - GLint w100 = IROUND( a * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); - GLint w010 = IROUND((1.0F-a) * b * (1.0F-c) * WEIGHT_SCALE); - GLint w110 = IROUND( a * b * (1.0F-c) * WEIGHT_SCALE); - GLint w001 = IROUND((1.0F-a) * (1.0F-b) * c * WEIGHT_SCALE); - GLint w101 = IROUND( a * (1.0F-b) * c * WEIGHT_SCALE); - GLint w011 = IROUND((1.0F-a) * b * c * WEIGHT_SCALE); - GLint w111 = IROUND( a * b * c * WEIGHT_SCALE); + GLint w000 = IROUND_POS((1.0F-a) * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); + GLint w100 = IROUND_POS( a * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); + GLint w010 = IROUND_POS((1.0F-a) * b * (1.0F-c) * WEIGHT_SCALE); + GLint w110 = IROUND_POS( a * b * (1.0F-c) * WEIGHT_SCALE); + GLint w001 = IROUND_POS((1.0F-a) * (1.0F-b) * c * WEIGHT_SCALE); + GLint w101 = IROUND_POS( a * (1.0F-b) * c * WEIGHT_SCALE); + GLint w011 = IROUND_POS((1.0F-a) * b * c * WEIGHT_SCALE); + GLint w111 = IROUND_POS( a * b * c * WEIGHT_SCALE); GLchan t000[4], t010[4], t001[4], t011[4]; GLchan t100[4], t110[4], t101[4], t111[4]; @@ -2531,8 +2531,8 @@ sample_depth_texture(const GLcontext *ctx, if (0) { /* compute a single weighted depth sample and do one comparison */ - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); + const GLfloat a = FRAC(u + 1.0F); + const GLfloat b = FRAC(v + 1.0F); const GLfloat w00 = (1.0F - a) * (1.0F - b); const GLfloat w10 = ( a) * (1.0F - b); const GLfloat w01 = (1.0F - a) * ( b); |