diff options
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_fs_exec.c')
| -rw-r--r-- | src/gallium/drivers/softpipe/sp_fs_exec.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/src/gallium/drivers/softpipe/sp_fs_exec.c b/src/gallium/drivers/softpipe/sp_fs_exec.c index 9ad30a7681..d5bd7a702f 100644 --- a/src/gallium/drivers/softpipe/sp_fs_exec.c +++ b/src/gallium/drivers/softpipe/sp_fs_exec.c @@ -44,9 +44,44 @@ struct sp_exec_fragment_shader { +/** + * Compute quad X,Y,Z,W for the four fragments in a quad. + * + * This should really be part of the compiled shader. + */ +void +sp_setup_pos_vector(const struct tgsi_interp_coef *coef, + float x, float y, + struct tgsi_exec_vector *quadpos) +{ + uint chan; + /* do X */ + quadpos->xyzw[0].f[0] = x; + quadpos->xyzw[0].f[1] = x + 1; + quadpos->xyzw[0].f[2] = x; + quadpos->xyzw[0].f[3] = x + 1; + + /* do Y */ + quadpos->xyzw[1].f[0] = y; + quadpos->xyzw[1].f[1] = y; + quadpos->xyzw[1].f[2] = y + 1; + quadpos->xyzw[1].f[3] = y + 1; + + /* do Z and W for all fragments in the quad */ + for (chan = 2; chan < 4; chan++) { + const float dadx = coef->dadx[chan]; + const float dady = coef->dady[chan]; + const float a0 = coef->a0[chan] + dadx * x + dady * y; + quadpos->xyzw[chan].f[0] = a0; + quadpos->xyzw[chan].f[1] = a0 + dadx; + quadpos->xyzw[chan].f[2] = a0 + dady; + quadpos->xyzw[chan].f[3] = a0 + dadx + dady; + } +} + static void -exec_prepare( struct sp_fragment_shader *base, +exec_prepare( const struct sp_fragment_shader *base, struct tgsi_exec_machine *machine, struct tgsi_sampler *samplers ) { @@ -63,7 +98,7 @@ exec_prepare( struct sp_fragment_shader *base, * interface: */ static unsigned -exec_run( struct sp_fragment_shader *base, +exec_run( const struct sp_fragment_shader *base, struct tgsi_exec_machine *machine, struct quad_header *quad ) { |