diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/state_tracker/st_mesa_to_tgsi.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c index 42f1c2017f8..f2a97ae293d 100644 --- a/src/mesa/state_tracker/st_mesa_to_tgsi.c +++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c @@ -751,10 +751,12 @@ compile_instruction( /** * Emit the TGSI instructions to adjust the WPOS pixel center convention + * Basically, add (adjX, adjY) to the fragment position. */ static void emit_adjusted_wpos( struct st_translate *t, - const struct gl_program *program, GLfloat value) + const struct gl_program *program, + GLfloat adjX, GLfloat adjY) { struct ureg_program *ureg = t->ureg; struct ureg_dst wpos_temp = ureg_DECL_temporary(ureg); @@ -764,7 +766,7 @@ emit_adjusted_wpos( struct st_translate *t, * The shader might also use gl_FragCoord.w and .z. */ ureg_ADD(ureg, wpos_temp, wpos_input, - ureg_imm4f(ureg, value, value, 0.0f, 0.0f)); + ureg_imm4f(ureg, adjX, adjY, 0.0f, 0.0f)); t->inputs[t->inputMapping[FRAG_ATTRIB_WPOS]] = ureg_src(wpos_temp); } @@ -870,7 +872,7 @@ emit_wpos(struct st_context *st, if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER); else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER)) - emit_adjusted_wpos(t, program, invert ? 0.5f : -0.5f); + emit_adjusted_wpos(t, program, 0.5f, invert ? 0.5f : -0.5f); else assert(0); } @@ -879,7 +881,7 @@ emit_wpos(struct st_context *st, } else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) { ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER); - emit_adjusted_wpos(t, program, invert ? -0.5f : 0.5f); + emit_adjusted_wpos(t, program, 0.5f, invert ? -0.5f : 0.5f); } else assert(0); |