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Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_lowering.h')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_lowering.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_lowering.h b/src/gallium/auxiliary/tgsi/tgsi_lowering.h new file mode 100644 index 00000000000..1b0daa96f0e --- /dev/null +++ b/src/gallium/auxiliary/tgsi/tgsi_lowering.h @@ -0,0 +1,89 @@ +/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */ + +/* + * Copyright (C) 2014 Rob Clark <[email protected]> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Authors: + * Rob Clark <[email protected]> + */ + +#ifndef FREEDRENO_LOWERING_H_ +#define FREEDRENO_LOWERING_H_ + +#include "pipe/p_shader_tokens.h" +#include "tgsi/tgsi_scan.h" + +struct fd_lowering_config { + /* For fragment shaders, generate a shader that emulates two + * sided color by inserting a BGCOLOR input for each COLOR + * input, and insert a CMP instruction to select the correct + * color to use based on the TGSI_SEMANTIC_FACE input. + * + * Note that drivers which use this to emulate two sided color + * will: + * a) need to generate (on demand) alternate shaders to use + * depending on the rasterizer state (ie. whether two + * sided shading enabled) + * b) expect to see the BGCOLOR semantic name in fragment + * shaders. During linkage, the driver should simply + * map VS.OUT.BGCOLOR[n] to FS.IN.BGCOLOR[n] (in the + * same was as linking other outs/ins). + */ + unsigned color_two_side : 1; + + /* TODO support for alpha_to_one as well?? */ + + /* Individual OPC lowerings, if lower_<opc> is TRUE then + * enable lowering of TGSI_OPCODE_<opc> + */ + unsigned lower_DST : 1; + unsigned lower_XPD : 1; + unsigned lower_SCS : 1; + unsigned lower_LRP : 1; + unsigned lower_FRC : 1; + unsigned lower_POW : 1; + unsigned lower_LIT : 1; + unsigned lower_EXP : 1; + unsigned lower_LOG : 1; + unsigned lower_DP4 : 1; + unsigned lower_DP3 : 1; + unsigned lower_DPH : 1; + unsigned lower_DP2 : 1; + unsigned lower_DP2A : 1; + + /* To emulate certain texture wrap modes, this can be used + * to saturate the specified tex coord to [0.0, 1.0]. The + * bits are according to sampler #, ie. if, for example: + * + * (conf->saturate_s & (1 << n)) + * + * is true, then the s coord for sampler n is saturated. + */ + unsigned saturate_s, saturate_t, saturate_r; +}; + +const struct tgsi_token * fd_transform_lowering( + const struct fd_lowering_config *config, + const struct tgsi_token *tokens, + struct tgsi_shader_info *info); + +#endif /* FREEDRENO_LOWERING_H_ */ |