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authorZack Rusin <zackr@vmware.com>2009-09-03 14:18:05 -0400
committerZack Rusin <zackr@vmware.com>2009-09-03 16:52:04 -0400
commit5571c4fe3650d062d9c469b774ff4930f43c4354 (patch)
treea445fcc0f216e962ed00cd12f3998c027dd5a1e5 /src
parent8c1d85cebe2a7f9aa9adf46deb698ee062cc33b7 (diff)
st/xorg: linear gradient shader
Diffstat (limited to 'src')
-rw-r--r--src/gallium/state_trackers/xorg/xorg_exa_tgsi.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c b/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c
index f9b10d8569..9fb1f3f6cb 100644
--- a/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c
+++ b/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c
@@ -86,6 +86,65 @@ vs_normalize_coords(struct ureg_program *ureg, struct ureg_src coords,
return ret;
}
+static void
+linear_gradient(struct ureg_program *ureg,
+ struct ureg_dst out,
+ struct ureg_src pos,
+ struct ureg_src sampler,
+ struct ureg_src coords,
+ struct ureg_src const0124,
+ struct ureg_src matrow0,
+ struct ureg_src matrow1,
+ struct ureg_src matrow2)
+{
+ struct ureg_dst temp0 = ureg_DECL_temporary(ureg);
+ struct ureg_dst temp1 = ureg_DECL_temporary(ureg);
+ struct ureg_dst temp2 = ureg_DECL_temporary(ureg);
+ struct ureg_dst temp3 = ureg_DECL_temporary(ureg);
+ struct ureg_dst temp4 = ureg_DECL_temporary(ureg);
+ struct ureg_dst temp5 = ureg_DECL_temporary(ureg);
+
+ ureg_MOV(ureg,
+ ureg_writemask(temp0, TGSI_WRITEMASK_XY), pos);
+ ureg_MOV(ureg,
+ ureg_writemask(temp0, TGSI_WRITEMASK_Z),
+ ureg_scalar(const0124, TGSI_SWIZZLE_Y));
+
+ ureg_DP3(ureg, temp1, matrow0, ureg_src(temp0));
+ ureg_DP3(ureg, temp2, matrow1, ureg_src(temp0));
+ ureg_DP3(ureg, temp3, matrow2, ureg_src(temp0));
+ ureg_RCP(ureg, temp3, ureg_src(temp3));
+ ureg_MUL(ureg, temp1, ureg_src(temp1), ureg_src(temp3));
+ ureg_MUL(ureg, temp2, ureg_src(temp2), ureg_src(temp3));
+
+ ureg_MOV(ureg, ureg_writemask(temp4, TGSI_WRITEMASK_X),
+ ureg_src(temp1));
+ ureg_MOV(ureg, ureg_writemask(temp4, TGSI_WRITEMASK_Y),
+ ureg_src(temp2));
+
+ ureg_MUL(ureg, temp0,
+ ureg_scalar(coords, TGSI_SWIZZLE_Y),
+ ureg_scalar(ureg_src(temp4), TGSI_SWIZZLE_Y));
+ ureg_MAD(ureg, temp1,
+ ureg_scalar(coords, TGSI_SWIZZLE_X),
+ ureg_scalar(ureg_src(temp4), TGSI_SWIZZLE_X),
+ ureg_src(temp0));
+
+ ureg_MUL(ureg, temp2,
+ ureg_src(temp1),
+ ureg_scalar(coords, TGSI_SWIZZLE_Z));
+
+ ureg_TEX(ureg, out,
+ TGSI_TEXTURE_1D, ureg_src(temp2), sampler);
+
+ ureg_release_temporary(ureg, temp0);
+ ureg_release_temporary(ureg, temp1);
+ ureg_release_temporary(ureg, temp2);
+ ureg_release_temporary(ureg, temp3);
+ ureg_release_temporary(ureg, temp4);
+ ureg_release_temporary(ureg, temp5);
+}
+
static void *
create_vs(struct pipe_context *pipe,
unsigned vs_traits)