Mesa (7.9): st/mesa: fix incorrect fragcoord.x translation
Brian Paul
brianp at kemper.freedesktop.org
Tue Feb 22 01:20:22 UTC 2011
Module: Mesa
Branch: 7.9
Commit: 0a218b00e7deeea0c217c5854eda0b667d98384a
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=0a218b00e7deeea0c217c5854eda0b667d98384a
Author: Brian Paul <brianp at vmware.com>
Date: Tue Jan 25 11:54:05 2011 -0700
st/mesa: fix incorrect fragcoord.x translation
emit_adjusted_wpos() needs separate x,y translation values. If we
invert Y, we don't want to effect X.
Part of the fix for http://bugs.freedesktop.org/show_bug.cgi?id=26795
NOTE: This is a candidate for the 7.9 and 7.10 branches.
(cherry picked from commit bb56631f0cb6b3fc552a72e0165816909bf6fdc9)
---
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 2712717..81980f7 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -739,10 +739,12 @@ 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);
@@ -752,7 +754,7 @@ 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);
}
@@ -858,7 +860,7 @@ 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);
}
@@ -867,7 +869,7 @@ 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);
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