text: /*
   * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
   * Copyright © 2018 Google, Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   *
   * Authors:
   *    Rob Clark <robclark@freedesktop.org>
   */
  
  
  #include "pipe/p_state.h"
  #include "util/u_string.h"
  #include "util/u_memory.h"
  
  #include "fd6_rasterizer.h"
  #include "fd6_context.h"
  #include "fd6_format.h"
  #include "fd6_pack.h"
  
  struct fd_ringbuffer *
  __fd6_setup_rasterizer_stateobj(struct fd_context *ctx,
  		const struct pipe_rasterizer_state *cso, bool primitive_restart)
  {
  	struct fd_ringbuffer *ring = fd_ringbuffer_new_object(ctx->pipe, 18 * 4);
  	float psize_min, psize_max;
  
  	if (cso->point_size_per_vertex) {
  		psize_min = util_get_min_point_size(cso);
  		psize_max = 4092;
  	} else {
  		/* Force the point size to be as if the vertex output was disabled. */
  		psize_min = cso->point_size;
  		psize_max = cso->point_size;
  	}
  
  	OUT_REG(ring,
  		A6XX_GRAS_CL_CNTL(
  			.znear_clip_disable = !cso->depth_clip_near,
  			.zfar_clip_disable = !cso->depth_clip_far,
  			.unk5 = !cso->depth_clip_near || !cso->depth_clip_far,
  			.vp_clip_code_ignore = 1,
  			.zero_gb_scale_z = cso->clip_halfz
  			));
  
  	OUT_REG(ring,
  		A6XX_GRAS_SU_CNTL(
  			.linehalfwidth = cso->line_width / 2.0,
  			.poly_offset = cso->offset_tri,
  			.msaa_enable = cso->multisample,
  			.cull_front = cso->cull_face & PIPE_FACE_FRONT,
  			.cull_back = cso->cull_face & PIPE_FACE_BACK,
  			.front_cw = !cso->front_ccw,
  		));
  
  	OUT_REG(ring,
  		A6XX_GRAS_SU_POINT_MINMAX(
  			.min = psize_min,
  			.max = psize_max,
  		),
  		A6XX_GRAS_SU_POINT_SIZE(
  			cso->point_size
  		));
  
  	OUT_REG(ring,
  		A6XX_GRAS_SU_POLY_OFFSET_SCALE(
  			cso->offset_scale
  		),
  		A6XX_GRAS_SU_POLY_OFFSET_OFFSET(
  			cso->offset_units
  		),
  		A6XX_GRAS_SU_POLY_OFFSET_OFFSET_CLAMP(
  			cso->offset_clamp
  		));
  
  	OUT_REG(ring,
  		A6XX_PC_PRIMITIVE_CNTL_0(
  			.provoking_vtx_last = !cso->flatshade_first,
  			.primitive_restart = primitive_restart,
  		));
  
  	enum a6xx_polygon_mode mode = POLYMODE6_TRIANGLES;
  	switch (cso->fill_front) {
  	case PIPE_POLYGON_MODE_POINT:
  		mode = POLYMODE6_POINTS;
  		break;
  	case PIPE_POLYGON_MODE_LINE:
  		mode = POLYMODE6_LINES;
  		break;
  	default:
  		assert(cso->fill_front == PIPE_POLYGON_MODE_FILL);
  		break;
  	}
  
  	OUT_REG(ring, A6XX_VPC_POLYGON_MODE(mode));
  	OUT_REG(ring, A6XX_PC_POLYGON_MODE(mode));
  
  	return ring;
  }
  
  void *
  fd6_rasterizer_state_create(struct pipe_context *pctx,
  		const struct pipe_rasterizer_state *cso)
  {
  	struct fd6_rasterizer_stateobj *so;
  
  	so = CALLOC_STRUCT(fd6_rasterizer_stateobj);
  	if (!so)
  		return NULL;
  
  	so->base = *cso;
  
  	return so;
  }
  
  void
  fd6_rasterizer_state_delete(struct pipe_context *pctx, void *hwcso)
  {
  	struct fd6_rasterizer_stateobj *so = hwcso;
  
  	for (unsigned i = 0; i < ARRAY_SIZE(so->stateobjs); i++)
  		if (so->stateobjs[i])
  			fd_ringbuffer_del(so->stateobjs[i]);
  
  	FREE(hwcso);
  }
  
  