/************************************************************************** * * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * 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, sub license, 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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: * Keith Whitwell */ #include "pipe/p_util.h" #include "draw_context.h" #include "draw_private.h" struct draw_context *draw_create( void ) { struct draw_context *draw = CALLOC_STRUCT( draw_context ); /* create pipeline stages */ draw->pipeline.unfilled = draw_unfilled_stage( draw ); draw->pipeline.twoside = draw_twoside_stage( draw ); draw->pipeline.offset = draw_offset_stage( draw ); draw->pipeline.clip = draw_clip_stage( draw ); draw->pipeline.flatshade = draw_flatshade_stage( draw ); draw->pipeline.cull = draw_cull_stage( draw ); draw->pipeline.feedback = draw_feedback_stage( draw ); draw->pipeline.validate = draw_validate_stage( draw ); draw->pipeline.first = draw->pipeline.validate; ASSIGN_4V( draw->plane[0], -1, 0, 0, 1 ); ASSIGN_4V( draw->plane[1], 1, 0, 0, 1 ); ASSIGN_4V( draw->plane[2], 0, -1, 0, 1 ); ASSIGN_4V( draw->plane[3], 0, 1, 0, 1 ); ASSIGN_4V( draw->plane[4], 0, 0, 1, 1 ); /* yes these are correct */ ASSIGN_4V( draw->plane[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */ draw->nr_planes = 6; /* Statically allocate maximum sized vertices for the cache - could be cleverer... */ { int i; char *tmp = malloc(Elements(draw->vcache.vertex) * MAX_VERTEX_SIZE); for (i = 0; i < Elements(draw->vcache.vertex); i++) draw->vcache.vertex[i] = (struct vertex_header *)(tmp + i * MAX_VERTEX_SIZE); } draw->attrib_front0 = -1; draw->attrib_back0 = -1; draw->attrib_front1 = -1; draw->attrib_back1 = -1; draw_vertex_cache_invalidate( draw ); return draw; } void draw_destroy( struct draw_context *draw ) { free( draw->vcache.vertex[0] ); /* Frees all the vertices. */ free( draw ); } void draw_flush( struct draw_context *draw ) { if (draw->drawing) draw_do_flush( draw, DRAW_FLUSH_DRAW ); } void draw_set_feedback_state( struct draw_context *draw, const struct pipe_feedback_state *feedback ) { draw_flush( draw ); draw->feedback = *feedback; } /** * Register new primitive rasterization/rendering state. * This causes the drawing pipeline to be rebuilt. */ void draw_set_rasterizer_state( struct draw_context *draw, const struct pipe_rasterizer_state *raster ) { draw_flush( draw ); draw->rasterizer = raster; } /** * Plug in the primitive rendering/rasterization stage. * This is provided by the device driver. */ void draw_set_rasterize_stage( struct draw_context *draw, struct draw_stage *stage ) { draw_flush( draw ); draw->pipeline.rasterize = stage; } /** * Set the draw module's clipping state. */ void draw_set_clip_state( struct draw_context *draw, const struct pipe_clip_state *clip ) { draw_flush( draw ); assert(clip->nr <= PIPE_MAX_CLIP_PLANES); memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0])); draw->nr_planes = 6 + clip->nr; /* bitmask of the enabled user-defined clip planes */ draw->user_clipmask = ((1 << clip->nr) - 1) << 6; } /** * Set the draw module's viewport state. */ void draw_set_viewport_state( struct draw_context *draw, const struct pipe_viewport_state *viewport ) { draw_flush( draw ); draw->viewport = *viewport; /* struct copy */ } void draw_set_vertex_buffer(struct draw_context *draw, unsigned attr, const struct pipe_vertex_buffer *buffer) { draw_flush( draw ); assert(attr < PIPE_ATTRIB_MAX); draw->vertex_buffer[attr] = *buffer; } void draw_set_vertex_element(struct draw_context *draw, unsigned attr, const struct pipe_vertex_element *element) { draw_flush( draw ); assert(attr < PIPE_ATTRIB_MAX); draw->vertex_element[attr] = *element; } /** * Tell drawing context where to find mapped vertex buffers. */ void draw_set_mapped_vertex_buffer(struct draw_context *draw, unsigned attr, const void *buffer) { draw_flush( draw ); draw->mapped_vbuffer[attr] = buffer; } void draw_set_mapped_constant_buffer(struct draw_context *draw, const void *buffer) { draw_flush( draw ); draw->mapped_constants = buffer; } void draw_set_mapped_feedback_buffer(struct draw_context *draw, uint index, void *buffer, uint size) { draw_flush( draw ); assert(index < PIPE_MAX_FEEDBACK_ATTRIBS); draw->mapped_feedback_buffer[index] = buffer; draw->mapped_feedback_buffer_size[index] = size; /* in bytes */ } /** * Allocate space for temporary post-transform vertices, such as for clipping. */ void draw_alloc_tmps( struct draw_stage *stage, unsigned nr ) { stage->nr_tmps = nr; if (nr) { ubyte *store = (ubyte *) malloc(MAX_VERTEX_SIZE * nr); unsigned i; stage->tmp = (struct vertex_header **) malloc(sizeof(struct vertex_header *) * nr); for (i = 0; i < nr; i++) stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE); } } void draw_free_tmps( struct draw_stage *stage ) { if (stage->tmp) { free(stage->tmp[0]); free(stage->tmp); } }