src/gallium/drivers/panfrost/nir/nir_lower_blend.h

   1 /*
   2  * Copyright Â 2019 Alyssa Rosenzweig
   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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef NIR_BLEND_H
  26 #define NIR_BLEND_H
  27
  28 #include "compiler/nir/nir.h"
  29 #include "pipe/p_format.h"
  30
  31 /* These structs encapsulates the blend state such that it can be lowered
  32  * cleanly
  33  */
  34
  35 typedef struct {
  36    enum blend_func func;
  37
  38    enum blend_factor src_factor;
  39    bool invert_src_factor;
  40
  41    enum blend_factor dst_factor;
  42    bool invert_dst_factor;
  43 } nir_lower_blend_channel;
  44
  45 typedef struct {
  46    struct {
  47       nir_lower_blend_channel rgb;
  48       nir_lower_blend_channel alpha;
  49
  50       /* 4-bit colormask. 0x0 for none, 0xF for RGBA, 0x1 for R */
  51       unsigned colormask;
  52    } rt[8];
  53 } nir_lower_blend_options;
  54
  55 void nir_lower_blend(nir_shader *shader, nir_lower_blend_options options);
  56
  57 void
  58 nir_lower_framebuffer(nir_shader *shader, enum pipe_format format,
  59                       unsigned gpu_id);
  60
  61 #endif