src/gallium/drivers/etnaviv/etnaviv_rasterizer.c

   1 /*
   2  * Copyright (c) 2012-2015 Etnaviv Project
   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, sub license,
   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
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the 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 NON-INFRINGEMENT. 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "etnaviv_rasterizer.h"
  25 #include "etnaviv_context.h"
  26 #include "etnaviv_screen.h"
  27
  28 #include "hw/common.xml.h"
  29
  30 #include "etnaviv_translate.h"
  31 #include "util/u_math.h"
  32 #include "util/u_memory.h"
  33
  34 void *
  35 etna_rasterizer_state_create(struct pipe_context *pctx,
  36                              const struct pipe_rasterizer_state *so)
  37 {
  38    struct etna_rasterizer_state *cs;
  39    struct etna_context *ctx = etna_context(pctx);
  40
  41     /* Disregard flatshading on GC880+, as a HW bug there seem to disable all
  42      * varying interpolation if it's enabled */
  43    bool flatshade = ctx->screen->model < 880 ? so->flatshade : false;
  44
  45    if (so->fill_front != so->fill_back)
  46       DBG("Different front and back fill mode not supported");
  47
  48    cs = CALLOC_STRUCT(etna_rasterizer_state);
  49    if (!cs)
  50       return NULL;
  51
  52    cs->base = *so;
  53
  54    cs->PA_CONFIG = (flatshade ? VIVS_PA_CONFIG_SHADE_MODEL_FLAT : VIVS_PA_CONFIG_SHADE_MODEL_SMOOTH) |
  55                    translate_cull_face(so->cull_face, so->front_ccw) |
  56                    translate_polygon_mode(so->fill_front) |
  57                    COND(so->point_quad_rasterization, VIVS_PA_CONFIG_POINT_SPRITE_ENABLE) |
  58                    COND(so->point_size_per_vertex, VIVS_PA_CONFIG_POINT_SIZE_ENABLE) |
  59                    COND(VIV_FEATURE(ctx->screen, chipMinorFeatures1, WIDE_LINE), VIVS_PA_CONFIG_WIDE_LINE);
  60    cs->PA_LINE_WIDTH = fui(so->line_width / 2.0f);
  61    cs->PA_POINT_SIZE = fui(so->point_size / 2.0f);
  62    cs->SE_DEPTH_SCALE = fui(so->offset_scale);
  63    cs->SE_DEPTH_BIAS = fui(so->offset_units) / 65535.0f;
  64    cs->SE_CONFIG = COND(so->line_last_pixel, VIVS_SE_CONFIG_LAST_PIXEL_ENABLE);
  65    /* XXX anything else? */
  66    /* XXX bottom_edge_rule */
  67    cs->PA_SYSTEM_MODE =
  68       COND(so->half_pixel_center, VIVS_PA_SYSTEM_MODE_UNK0 | VIVS_PA_SYSTEM_MODE_UNK4);
  69
  70    /* so->scissor overrides the scissor, defaulting to the whole framebuffer,
  71     * with the scissor state */
  72    cs->scissor = so->scissor;
  73
  74    /* point size per vertex adds a vertex shader output */
  75    cs->point_size_per_vertex = so->point_size_per_vertex;
  76
  77    assert(!so->clip_halfz); /* could be supported with shader magic, actually
  78                                D3D z is default on older gc */
  79
  80    return cs;
  81 }