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Member "mesa-20.1.8/src/gallium/auxiliary/tgsi/tgsi_lowering.h" (16 Sep 2020, 3291 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 /*
    2  * Copyright (C) 2014 Rob Clark <robclark@freedesktop.org>
    3  *
    4  * Permission is hereby granted, free of charge, to any person obtaining a
    5  * copy of this software and associated documentation files (the "Software"),
    6  * to deal in the Software without restriction, including without limitation
    7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
    8  * and/or sell copies of the Software, and to permit persons to whom the
    9  * Software is furnished to do so, subject to the following conditions:
   10  *
   11  * The above copyright notice and this permission notice (including the next
   12  * paragraph) shall be included in all copies or substantial portions of the
   13  * Software.
   14  *
   15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   21  * SOFTWARE.
   22  *
   23  * Authors:
   24  *    Rob Clark <robclark@freedesktop.org>
   25  */
   26 
   27 #ifndef TGSI_LOWERING_H_
   28 #define TGSI_LOWERING_H_
   29 
   30 #include "pipe/p_shader_tokens.h"
   31 #include "tgsi/tgsi_scan.h"
   32 
   33 struct tgsi_lowering_config
   34 {
   35    /* For fragment shaders, generate a shader that emulates two
   36     * sided color by inserting a BGCOLOR input for each COLOR
   37     * input, and insert a CMP instruction to select the correct
   38     * color to use based on the TGSI_SEMANTIC_FACE input.
   39     *
   40     * Note that drivers which use this to emulate two sided color
   41     * will:
   42     *  a) need to generate (on demand) alternate shaders to use
   43     *     depending on the rasterizer state (ie. whether two
   44     *     sided shading enabled)
   45     *  b) expect to see the BGCOLOR semantic name in fragment
   46     *     shaders.  During linkage, the driver should simply
   47     *     map VS.OUT.BGCOLOR[n] to FS.IN.BGCOLOR[n] (in the
   48     *     same was as linking other outs/ins).
   49     */
   50    unsigned color_two_side:1;
   51 
   52    /* TODO support for alpha_to_one as well?? */
   53 
   54    /* Individual OPC lowerings, if lower_<opc> is TRUE then
   55     * enable lowering of TGSI_OPCODE_<opc>
   56     */
   57    unsigned lower_DST:1;
   58    unsigned lower_LRP:1;
   59    unsigned lower_FRC:1;
   60    unsigned lower_POW:1;
   61    unsigned lower_LIT:1;
   62    unsigned lower_EXP:1;
   63    unsigned lower_LOG:1;
   64    unsigned lower_DP4:1;
   65    unsigned lower_DP3:1;
   66    unsigned lower_DP2:1;
   67    unsigned lower_FLR:1;
   68    unsigned lower_CEIL:1;
   69    unsigned lower_TRUNC:1;
   70 
   71    /* bitmask of (1 << TGSI_TEXTURE_type): */
   72    unsigned lower_TXP;
   73 
   74    /* To emulate certain texture wrap modes, this can be used
   75     * to saturate the specified tex coord to [0.0, 1.0].  The
   76     * bits are according to sampler #, ie. if, for example:
   77     *
   78     *   (conf->saturate_s & (1 << n))
   79     *
   80     * is true, then the s coord for sampler n is saturated.
   81     */
   82    unsigned saturate_s, saturate_t, saturate_r;
   83 };
   84 
   85 const struct tgsi_token *
   86 tgsi_transform_lowering(const struct tgsi_lowering_config *config,
   87                         const struct tgsi_token *tokens,
   88                         struct tgsi_shader_info *info);
   89 
   90 #endif /* FREEDRENO_LOWERING_H_ */