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
  31         struct vc4_cl_out *bcl = cl_start(&vc4->bcl);
  32         if (vc4->dirty & (VC4_DIRTY_SCISSOR | VC4_DIRTY_VIEWPORT |
  33                           VC4_DIRTY_RASTERIZER)) {
  34                 float *vpscale = vc4->viewport.scale;
  35                 float *vptranslate = vc4->viewport.translate;
  36                 float vp_minx = -fabsf(vpscale[0]) + vptranslate[0];
  37                 float vp_maxx = fabsf(vpscale[0]) + vptranslate[0];
  38                 float vp_miny = -fabsf(vpscale[1]) + vptranslate[1];
  39                 float vp_maxy = fabsf(vpscale[1]) + vptranslate[1];
  40
  41                 /* Clip to the scissor if it's enabled, but still clip to the
  42                  * drawable regardless since that controls where the binner
  43                  * tries to put things.
  44                  *
  45                  * Additionally, always clip the rendering to the viewport,
  46                  * since the hardware does guardband clipping, meaning
  47                  * primitives would rasterize outside of the view volume.
  48                  */
  49                 uint32_t minx, miny, maxx, maxy;
  50                 if (!vc4->rasterizer->base.scissor) {
  51                         minx = MAX2(vp_minx, 0);
  52                         miny = MAX2(vp_miny, 0);
  53                         maxx = MIN2(vp_maxx, vc4->draw_width);
  54                         maxy = MIN2(vp_maxy, vc4->draw_height);
  55                 } else {
  56                         minx = MAX2(vp_minx, vc4->scissor.minx);
  57                         miny = MAX2(vp_miny, vc4->scissor.miny);
  58                         maxx = MIN2(vp_maxx, vc4->scissor.maxx);
  59                         maxy = MIN2(vp_maxy, vc4->scissor.maxy);
  60                 }
  61
  62                 cl_u8(&bcl, VC4_PACKET_CLIP_WINDOW);
  63                 cl_u16(&bcl, minx);
  64                 cl_u16(&bcl, miny);
  65                 cl_u16(&bcl, maxx - minx);
  66                 cl_u16(&bcl, maxy - miny);
  67
  68                 vc4->draw_min_x = MIN2(vc4->draw_min_x, minx);
  69                 vc4->draw_min_y = MIN2(vc4->draw_min_y, miny);
  70                 vc4->draw_max_x = MAX2(vc4->draw_max_x, maxx);
  71                 vc4->draw_max_y = MAX2(vc4->draw_max_y, maxy);
  72         }
  73
  74         if (vc4->dirty & (VC4_DIRTY_RASTERIZER | VC4_DIRTY_ZSA)) {
  75                 uint8_t ez_enable_mask_out = ~0;
  76
  77                 /* HW-2905: If the RCL ends up doing a full-res load when
  78                  * multisampling, then early Z tracking may end up with values
  79                  * from the previous tile due to a HW bug.  Disable it to
  80                  * avoid that.
  81                  *
  82                  * We should be able to skip this when the Z is cleared, but I
  83                  * was seeing bad rendering on glxgears -samples 4 even in
  84                  * that case.
  85                  */
  86                 if (vc4->msaa)
  87                         ez_enable_mask_out &= ~VC4_CONFIG_BITS_EARLY_Z;
  88
  89                 cl_u8(&bcl, VC4_PACKET_CONFIGURATION_BITS);
  90                 cl_u8(&bcl,
  91                       vc4->rasterizer->config_bits[0] |
  92                       vc4->zsa->config_bits[0]);
  93                 cl_u8(&bcl,
  94                       vc4->rasterizer->config_bits[1] |
  95                       vc4->zsa->config_bits[1]);
  96                 cl_u8(&bcl,
  97                       (vc4->rasterizer->config_bits[2] |
  98                        vc4->zsa->config_bits[2]) & ez_enable_mask_out);
  99         }
 100
 101         if (vc4->dirty & VC4_DIRTY_RASTERIZER) {
 102                 cl_u8(&bcl, VC4_PACKET_DEPTH_OFFSET);
 103                 cl_u16(&bcl, vc4->rasterizer->offset_factor);
 104                 cl_u16(&bcl, vc4->rasterizer->offset_units);
 105
 106                 cl_u8(&bcl, VC4_PACKET_POINT_SIZE);
 107                 cl_f(&bcl, vc4->rasterizer->point_size);
 108
 109                 cl_u8(&bcl, VC4_PACKET_LINE_WIDTH);
 110                 cl_f(&bcl, vc4->rasterizer->base.line_width);
 111         }
 112
 113         if (vc4->dirty & VC4_DIRTY_VIEWPORT) {
 114                 cl_u8(&bcl, VC4_PACKET_CLIPPER_XY_SCALING);
 115                 cl_f(&bcl, vc4->viewport.scale[0] * 16.0f);
 116                 cl_f(&bcl, vc4->viewport.scale[1] * 16.0f);
 117
 118                 cl_u8(&bcl, VC4_PACKET_CLIPPER_Z_SCALING);
 119                 cl_f(&bcl, vc4->viewport.translate[2]);
 120                 cl_f(&bcl, vc4->viewport.scale[2]);
 121
 122                 cl_u8(&bcl, VC4_PACKET_VIEWPORT_OFFSET);
 123                 cl_u16(&bcl, 16 * vc4->viewport.translate[0]);
 124                 cl_u16(&bcl, 16 * vc4->viewport.translate[1]);
 125         }
 126
 127         if (vc4->dirty & VC4_DIRTY_FLAT_SHADE_FLAGS) {
 128                 cl_u8(&bcl, VC4_PACKET_FLAT_SHADE_FLAGS);
 129                 cl_u32(&bcl, vc4->rasterizer->base.flatshade ?
 130                        vc4->prog.fs->color_inputs : 0);
 131         }
 132
 133         cl_end(&vc4->bcl, bcl);
 134 }