src/gallium/drivers/vc4/vc4_emit.c

   1 /*
   2  * Copyright © 2014 Broadcom
   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 #include "vc4_context.h"
  25
  26 void
  27 vc4_emit_state(struct pipe_context *pctx)
  28 {
  29         struct vc4_context *vc4 = vc4_context(pctx);
  30         struct vc4_job *job = vc4->job;
  31
  32         struct vc4_cl_out *bcl = cl_start(&job->bcl);
  33         if (vc4->dirty & (VC4_DIRTY_SCISSOR | VC4_DIRTY_VIEWPORT |
  34                           VC4_DIRTY_RASTERIZER)) {
  35                 float *vpscale = vc4->viewport.scale;
  36                 float *vptranslate = vc4->viewport.translate;
  37                 float vp_minx = -fabsf(vpscale[0]) + vptranslate[0];
  38                 float vp_maxx = fabsf(vpscale[0]) + vptranslate[0];
  39                 float vp_miny = -fabsf(vpscale[1]) + vptranslate[1];
  40                 float vp_maxy = fabsf(vpscale[1]) + vptranslate[1];
  41
  42                 /* Clip to the scissor if it's enabled, but still clip to the
  43                  * drawable regardless since that controls where the binner
  44                  * tries to put things.
  45                  *
  46                  * Additionally, always clip the rendering to the viewport,
  47                  * since the hardware does guardband clipping, meaning
  48                  * primitives would rasterize outside of the view volume.
  49                  */
  50                 uint32_t minx, miny, maxx, maxy;
  51                 if (!vc4->rasterizer->base.scissor) {
  52                         minx = MAX2(vp_minx, 0);
  53                         miny = MAX2(vp_miny, 0);
  54                         maxx = MIN2(vp_maxx, job->draw_width);
  55                         maxy = MIN2(vp_maxy, job->draw_height);
  56                 } else {
  57                         minx = MAX2(vp_minx, vc4->scissor.minx);
  58                         miny = MAX2(vp_miny, vc4->scissor.miny);
  59                         maxx = MIN2(vp_maxx, vc4->scissor.maxx);
  60                         maxy = MIN2(vp_maxy, vc4->scissor.maxy);
  61                 }
  62
  63                 cl_u8(&bcl, VC4_PACKET_CLIP_WINDOW);
  64                 cl_u16(&bcl, minx);
  65                 cl_u16(&bcl, miny);
  66                 cl_u16(&bcl, maxx - minx);
  67                 cl_u16(&bcl, maxy - miny);
  68
  69                 job->draw_min_x = MIN2(job->draw_min_x, minx);
  70                 job->draw_min_y = MIN2(job->draw_min_y, miny);
  71                 job->draw_max_x = MAX2(job->draw_max_x, maxx);
  72                 job->draw_max_y = MAX2(job->draw_max_y, maxy);
  73         }
  74
  75         if (vc4->dirty & (VC4_DIRTY_RASTERIZER |
  76                           VC4_DIRTY_ZSA |
  77                           VC4_DIRTY_COMPILED_FS)) {
  78                 uint8_t ez_enable_mask_out = ~0;
  79                 uint8_t rasosm_mask_out = ~0;
  80
  81                 /* HW-2905: If the RCL ends up doing a full-res load when
  82                  * multisampling, then early Z tracking may end up with values
  83                  * from the previous tile due to a HW bug.  Disable it to
  84                  * avoid that.
  85                  *
  86                  * We should be able to skip this when the Z is cleared, but I
  87                  * was seeing bad rendering on glxgears -samples 4 even in
  88                  * that case.
  89                  */
  90                 if (job->msaa || vc4->prog.fs->disable_early_z)
  91                         ez_enable_mask_out &= ~VC4_CONFIG_BITS_EARLY_Z;
  92
  93                 /* Don't set the rasterizer to oversample if we're doing our
  94                  * binning and load/stores in single-sample mode.  This is for
  95                  * the samples == 1 case, where vc4 doesn't do any
  96                  * multisampling behavior.
  97                  */
  98                 if (!job->msaa) {
  99                         rasosm_mask_out &=
 100                                 ~VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_4X;
 101                 }
 102
 103                 cl_u8(&bcl, VC4_PACKET_CONFIGURATION_BITS);
 104                 cl_u8(&bcl,
 105                       (vc4->rasterizer->config_bits[0] |
 106                        vc4->zsa->config_bits[0]) & rasosm_mask_out);
 107                 cl_u8(&bcl,
 108                       vc4->rasterizer->config_bits[1] |
 109                       vc4->zsa->config_bits[1]);
 110                 cl_u8(&bcl,
 111                       (vc4->rasterizer->config_bits[2] |
 112                        vc4->zsa->config_bits[2]) & ez_enable_mask_out);
 113         }
 114
 115         if (vc4->dirty & VC4_DIRTY_RASTERIZER) {
 116                 cl_u8(&bcl, VC4_PACKET_DEPTH_OFFSET);
 117                 cl_u16(&bcl, vc4->rasterizer->offset_factor);
 118                 cl_u16(&bcl, vc4->rasterizer->offset_units);
 119
 120                 cl_u8(&bcl, VC4_PACKET_POINT_SIZE);
 121                 cl_f(&bcl, vc4->rasterizer->point_size);
 122
 123                 cl_u8(&bcl, VC4_PACKET_LINE_WIDTH);
 124                 cl_f(&bcl, vc4->rasterizer->base.line_width);
 125         }
 126
 127         if (vc4->dirty & VC4_DIRTY_VIEWPORT) {
 128                 cl_u8(&bcl, VC4_PACKET_CLIPPER_XY_SCALING);
 129                 cl_f(&bcl, vc4->viewport.scale[0] * 16.0f);
 130                 cl_f(&bcl, vc4->viewport.scale[1] * 16.0f);
 131
 132                 cl_u8(&bcl, VC4_PACKET_CLIPPER_Z_SCALING);
 133                 cl_f(&bcl, vc4->viewport.translate[2]);
 134                 cl_f(&bcl, vc4->viewport.scale[2]);
 135
 136                 cl_u8(&bcl, VC4_PACKET_VIEWPORT_OFFSET);
 137                 cl_u16(&bcl, 16 * vc4->viewport.translate[0]);
 138                 cl_u16(&bcl, 16 * vc4->viewport.translate[1]);
 139         }
 140
 141         if (vc4->dirty & VC4_DIRTY_FLAT_SHADE_FLAGS) {
 142                 cl_u8(&bcl, VC4_PACKET_FLAT_SHADE_FLAGS);
 143                 cl_u32(&bcl, vc4->rasterizer->base.flatshade ?
 144                        vc4->prog.fs->color_inputs : 0);
 145         }
 146
 147         cl_end(&job->bcl, bcl);
 148 }