1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #include "pipe/p_defines.h" 29 #include "util/u_memory.h" 30 #include "lp_context.h" 31 #include "lp_state.h" 32 #include "lp_setup.h" 33 #include "draw/draw_context.h" 34 35 struct lp_rast_state { 36 struct pipe_rasterizer_state lp_state; 37 struct pipe_rasterizer_state draw_state; 38 }; 39 40 /* State which might be handled in either the draw module or locally. 41 * This function is used to turn that state off in one of the two 42 * places. 43 */ 44 static void 45 clear_flags(struct pipe_rasterizer_state *rast) 46 { 47 rast->light_twoside = 0; 48 rast->offset_tri = 0; 49 rast->offset_line = 0; 50 rast->offset_point = 0; 51 rast->offset_units = 0.0f; 52 rast->offset_scale = 0.0f; 53 } 54 55 56 57 static void * 58 llvmpipe_create_rasterizer_state(struct pipe_context *pipe, 59 const struct pipe_rasterizer_state *rast) 60 { 61 boolean need_pipeline; 62 63 /* Partition rasterizer state into what we want the draw module to 64 * handle, and what we'll look after ourselves. 65 */ 66 struct lp_rast_state *state = MALLOC_STRUCT(lp_rast_state); 67 if (!state) 68 return NULL; 69 70 memcpy(&state->draw_state, rast, sizeof *rast); 71 memcpy(&state->lp_state, rast, sizeof *rast); 72 73 /* We rely on draw module to do unfilled polyons, AA lines and 74 * points and stipple. 75 * 76 * Over time, reduce this list of conditions, and expand the list 77 * of flags which get cleared in clear_flags(). 78 */ 79 need_pipeline = (rast->fill_front != PIPE_POLYGON_MODE_FILL || 80 rast->fill_back != PIPE_POLYGON_MODE_FILL || 81 rast->point_smooth || 82 rast->line_smooth || 83 rast->line_stipple_enable || 84 rast->poly_stipple_enable); 85 86 /* If not using the pipeline, clear out the flags which we can 87 * handle ourselves. If we *are* using the pipeline, do everything 88 * on the pipeline and clear those flags on our internal copy of 89 * the state. 90 */ 91 if (need_pipeline) 92 clear_flags(&state->lp_state); 93 else 94 clear_flags(&state->draw_state); 95 96 return state; 97 } 98 99 100 101 static void 102 llvmpipe_bind_rasterizer_state(struct pipe_context *pipe, void *handle) 103 { 104 struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); 105 const struct lp_rast_state *state = 106 (const struct lp_rast_state *) handle; 107 108 if (state) { 109 llvmpipe->rasterizer = &state->lp_state; 110 draw_set_rasterizer_state(llvmpipe->draw, &state->draw_state, handle); 111 112 /* XXX: just pass lp_state directly to setup. 113 */ 114 lp_setup_set_triangle_state( llvmpipe->setup, 115 state->lp_state.cull_face, 116 state->lp_state.front_ccw, 117 state->lp_state.scissor, 118 state->lp_state.half_pixel_center, 119 state->lp_state.bottom_edge_rule); 120 lp_setup_set_flatshade_first( llvmpipe->setup, 121 state->lp_state.flatshade_first); 122 lp_setup_set_line_state( llvmpipe->setup, 123 state->lp_state.line_width); 124 lp_setup_set_point_state( llvmpipe->setup, 125 state->lp_state.point_size, 126 state->lp_state.point_size_per_vertex, 127 state->lp_state.sprite_coord_enable, 128 state->lp_state.sprite_coord_mode); 129 } 130 else { 131 llvmpipe->rasterizer = NULL; 132 draw_set_rasterizer_state(llvmpipe->draw, NULL, handle); 133 } 134 135 llvmpipe->dirty |= LP_NEW_RASTERIZER; 136 } 137 138 139 static void 140 llvmpipe_delete_rasterizer_state(struct pipe_context *pipe, 141 void *rasterizer) 142 { 143 FREE( rasterizer ); 144 } 145 146 147 148 void 149 llvmpipe_init_rasterizer_funcs(struct llvmpipe_context *llvmpipe) 150 { 151 llvmpipe->pipe.create_rasterizer_state = llvmpipe_create_rasterizer_state; 152 llvmpipe->pipe.bind_rasterizer_state = llvmpipe_bind_rasterizer_state; 153 llvmpipe->pipe.delete_rasterizer_state = llvmpipe_delete_rasterizer_state; 154 } 155