diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_fp.c | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_fp.c b/src/mesa/drivers/dri/i965/brw_wm_fp.c index 6df2c95d80c..fdacad0053c 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_fp.c +++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c @@ -554,12 +554,19 @@ static void precalc_lit( struct brw_wm_compile *c, } } + +/** + * Some TEX instructions require extra code, cube map coordinate + * normalization, or coordinate scaling for RECT textures, etc. + * This function emits those extra instructions and the TEX + * instruction itself. + */ static void precalc_tex( struct brw_wm_compile *c, const struct prog_instruction *inst ) { struct prog_src_register coord; struct prog_dst_register tmpcoord; - GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit]; + const GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit]; if (inst->TexSrcTarget == TEXTURE_CUBE_INDEX) { struct prog_instruction *out; @@ -569,9 +576,11 @@ static void precalc_tex( struct brw_wm_compile *c, struct prog_src_register tmp1src = src_reg_from_dst(tmp1); struct prog_src_register src0 = inst->SrcReg[0]; + /* find longest component of coord vector and normalize it */ tmpcoord = get_temp(c); coord = src_reg_from_dst(tmpcoord); + /* tmpcoord = src0 (i.e.: coord = src0) */ out = emit_op(c, OPCODE_MOV, tmpcoord, 0, 0, 0, @@ -581,6 +590,7 @@ static void precalc_tex( struct brw_wm_compile *c, out->SrcReg[0].NegateBase = 0; out->SrcReg[0].Abs = 1; + /* tmp0 = MAX(coord.X, coord.Y) */ emit_op(c, OPCODE_MAX, tmp0, 0, 0, 0, @@ -588,6 +598,7 @@ static void precalc_tex( struct brw_wm_compile *c, src_swizzle1(coord, Y), src_undef()); + /* tmp1 = MAX(tmp0, coord.Z) */ emit_op(c, OPCODE_MAX, tmp1, 0, 0, 0, @@ -595,6 +606,7 @@ static void precalc_tex( struct brw_wm_compile *c, src_swizzle1(coord, Z), src_undef()); + /* tmp0 = 1 / tmp1 */ emit_op(c, OPCODE_RCP, tmp0, 0, 0, 0, @@ -602,6 +614,7 @@ static void precalc_tex( struct brw_wm_compile *c, src_undef(), src_undef()); + /* tmpCoord = src0 * tmp0 */ emit_op(c, OPCODE_MUL, tmpcoord, 0, 0, 0, @@ -611,7 +624,8 @@ static void precalc_tex( struct brw_wm_compile *c, release_temp(c, tmp0); release_temp(c, tmp1); - } else if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) { + } + else if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) { struct prog_src_register scale = search_or_add_param5( c, STATE_INTERNAL, @@ -642,19 +656,9 @@ static void precalc_tex( struct brw_wm_compile *c, * conversion requires allocating a temporary variable which we * don't have the facility to do that late in the compilation. */ - if (!(c->key.yuvtex_mask & (1<<unit))) { - emit_op(c, - OPCODE_TEX, - inst->DstReg, - inst->SaturateMode, - unit, - inst->TexSrcTarget, - coord, - src_undef(), - src_undef()); - } - else { - GLboolean swap_uv = c->key.yuvtex_swap_mask & (1<<unit); + if (c->key.yuvtex_mask & (1 << unit)) { + /* convert ycbcr to RGBA */ + GLboolean swap_uv = c->key.yuvtex_swap_mask & (1<<unit); /* CONST C0 = { -.5, -.0625, -.5, 1.164 } @@ -734,6 +738,18 @@ static void precalc_tex( struct brw_wm_compile *c, release_temp(c, tmp); } + else { + /* ordinary RGBA tex instruction */ + emit_op(c, + OPCODE_TEX, + inst->DstReg, + inst->SaturateMode, + unit, + inst->TexSrcTarget, + coord, + src_undef(), + src_undef()); + } if ((inst->TexSrcTarget == TEXTURE_RECT_INDEX) || (inst->TexSrcTarget == TEXTURE_CUBE_INDEX)) |