From 5571c4fe3650d062d9c469b774ff4930f43c4354 Mon Sep 17 00:00:00 2001 From: Zack Rusin Date: Thu, 3 Sep 2009 14:18:05 -0400 Subject: st/xorg: linear gradient shader --- src/gallium/state_trackers/xorg/xorg_exa_tgsi.c | 59 +++++++++++++++++++++++++ 1 file changed, 59 insertions(+) (limited to 'src/gallium/state_trackers') diff --git a/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c b/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c index f9b10d85695..9fb1f3f6cbf 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) -- cgit v1.2.3