From 411d5063323ccdb85ec090f1c852fcc8e9cd0e64 Mon Sep 17 00:00:00 2001 From: Marek Olšák Date: Sat, 17 Apr 2010 02:43:47 +0200 Subject: r300/compiler: add emulation of all mirrored-clamp wrap modes for NPOT textures --- .../drivers/dri/r300/compiler/radeon_program_tex.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c') diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c index a8927acdff..0ca95d454b 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c @@ -233,7 +233,7 @@ int radeonTransformTEX( inst_frc->U.I.DstReg.Index = temp; inst_frc->U.I.DstReg.WriteMask = RC_MASK_XYZ; inst_frc->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; - } else if (wrapmode == RC_WRAP_MIRROR) { + } else if (wrapmode == RC_WRAP_MIRRORED_REPEAT) { /* * Function: * f(v) = 1 - abs(frac(v * 0.5) * 2 - 1) @@ -295,6 +295,22 @@ int radeonTransformTEX( inst_add->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_XYZ0; inst_add->U.I.SrcReg[1].Abs = 1; inst_add->U.I.SrcReg[1].Negate = RC_MASK_XYZ; + } else if (wrapmode == RC_WRAP_MIRRORED_CLAMP) { + /* + * Mirrored clamp modes are bloody simple, we just use abs + * to mirror [0, 1] into [-1, 0]. This works for + * all modes i.e. CLAMP, CLAMP_TO_EDGE, and CLAMP_TO_BORDER. + */ + struct rc_instruction *inst_mov; + + inst_mov = rc_insert_new_instruction(c, inst->Prev); + + inst_mov->U.I.Opcode = RC_OPCODE_MOV; + inst_mov->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_mov->U.I.DstReg.Index = temp; + inst_mov->U.I.DstReg.WriteMask = RC_MASK_XYZ; + inst_mov->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_mov->U.I.SrcReg[0].Abs = 1; } /* Preserve W for TXP/TXB. */ -- cgit v1.2.3