diff options
| author | Brian Paul <brianp@vmware.com> | 2010-02-05 12:57:11 -0700 |
|---|---|---|
| committer | Michal Krol <michal@vmware.com> | 2010-02-09 15:33:06 +0100 |
| commit | a1a441179bacdd33e83a48651c7a7a2cc4a8a665 (patch) | |
| tree | cfba98a3b3568156f6669979f54d6e89a6e1cf00 | |
| parent | fd6701029b15260ecf26d4139defc51cd8546ee7 (diff) | |
fix bug in perspective corrected interpolants for lines
| -rw-r--r-- | src/gallium/drivers/softpipe/sp_setup.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/src/gallium/drivers/softpipe/sp_setup.c b/src/gallium/drivers/softpipe/sp_setup.c index 9036f32c09..b8590a8cc2 100644 --- a/src/gallium/drivers/softpipe/sp_setup.c +++ b/src/gallium/drivers/softpipe/sp_setup.c @@ -908,7 +908,6 @@ line_persp_coeff(const struct setup_context *setup, uint i, const float v[2]) { - /* XXX double-check/verify this arithmetic */ const float a0 = v[0] * setup->vmin[0][3]; const float a1 = v[1] * setup->vmax[0][3]; const float da = a1 - a0; @@ -916,7 +915,7 @@ line_persp_coeff(const struct setup_context *setup, const float dady = da * setup->emaj.dy * setup->oneoverarea; coef->dadx[i] = dadx; coef->dady[i] = dady; - coef->a0[i] = (v[0] - /* XXX: <-- shouldn't that be a0? */ + coef->a0[i] = (a0 - (dadx * (setup->vmin[0][0] - setup->pixel_offset) + dady * (setup->vmin[0][1] - setup->pixel_offset))); } |