/************************************************************************** * * 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. * **************************************************************************/ /** * Interface between 'draw' module's output and the llvmpipe rasterizer/setup * code. When the 'draw' module has finished filling a vertex buffer, the * draw_arrays() functions below will be called. Loop over the vertices and * call the point/line/tri setup functions. * * Authors * Brian Paul */ #include "lp_setup_context.h" #include "lp_context.h" #include "draw/draw_vbuf.h" #include "draw/draw_vertex.h" #include "util/u_memory.h" #define LP_MAX_VBUF_INDEXES 1024 #define LP_MAX_VBUF_SIZE 4096 /** cast wrapper */ static struct lp_setup_context * lp_setup_context(struct vbuf_render *vbr) { return (struct lp_setup_context *) vbr; } static const struct vertex_info * lp_setup_get_vertex_info(struct vbuf_render *vbr) { struct lp_setup_context *setup = lp_setup_context(vbr); /* Vertex size/info depends on the latest state. * The draw module may have issued additional state-change commands. */ lp_setup_update_state(setup, FALSE); return setup->vertex_info; } static boolean lp_setup_allocate_vertices(struct vbuf_render *vbr, ushort vertex_size, ushort nr_vertices) { struct lp_setup_context *setup = lp_setup_context(vbr); unsigned size = vertex_size * nr_vertices; if (setup->vertex_buffer_size < size) { align_free(setup->vertex_buffer); setup->vertex_buffer = align_malloc(size, 16); setup->vertex_buffer_size = size; } setup->vertex_size = vertex_size; setup->nr_vertices = nr_vertices; return setup->vertex_buffer != NULL; } static void lp_setup_release_vertices(struct vbuf_render *vbr) { /* keep the old allocation for next time */ } static void * lp_setup_map_vertices(struct vbuf_render *vbr) { struct lp_setup_context *setup = lp_setup_context(vbr); return setup->vertex_buffer; } static void lp_setup_unmap_vertices(struct vbuf_render *vbr, ushort min_index, ushort max_index ) { struct lp_setup_context *setup = lp_setup_context(vbr); assert( setup->vertex_buffer_size >= (max_index+1) * setup->vertex_size ); /* do nothing */ } static void lp_setup_set_primitive(struct vbuf_render *vbr, unsigned prim) { lp_setup_context(vbr)->prim = prim; } typedef const float (*const_float4_ptr)[4]; static INLINE const_float4_ptr get_vert( const void *vertex_buffer, int index, int stride ) { return (const_float4_ptr)((char *)vertex_buffer + index * stride); } /** * draw elements / indexed primitives */ static void lp_setup_draw_elements(struct vbuf_render *vbr, const ushort *indices, uint nr) { struct lp_setup_context *setup = lp_setup_context(vbr); const unsigned stride = setup->vertex_info->size * sizeof(float); const void *vertex_buffer = setup->vertex_buffer; const boolean flatshade_first = setup->flatshade_first; unsigned i; assert(setup->setup.variant); if (!lp_setup_update_state(setup, TRUE)) return; switch (setup->prim) { case PIPE_PRIM_POINTS: for (i = 0; i < nr; i++) { setup->point( setup, get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_LINES: for (i = 1; i < nr; i += 2) { setup->line( setup, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_LINE_STRIP: for (i = 1; i < nr; i ++) { setup->line( setup, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_LINE_LOOP: for (i = 1; i < nr; i ++) { setup->line( setup, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } if (nr) { setup->line( setup, get_vert(vertex_buffer, indices[nr-1], stride), get_vert(vertex_buffer, indices[0], stride) ); } break; case PIPE_PRIM_TRIANGLES: for (i = 2; i < nr; i += 3) { setup->triangle( setup, get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } break; case PIPE_PRIM_TRIANGLE_STRIP: if (flatshade_first) { for (i = 2; i < nr; i += 1) { /* emit first triangle vertex as first triangle vertex */ setup->triangle( setup, get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i+(i&1)-1], stride), get_vert(vertex_buffer, indices[i-(i&1)], stride) ); } } else { for (i = 2; i < nr; i += 1) { /* emit last triangle vertex as last triangle vertex */ setup->triangle( setup, get_vert(vertex_buffer, indices[i+(i&1)-2], stride), get_vert(vertex_buffer, indices[i-(i&1)-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } } break; case PIPE_PRIM_TRIANGLE_FAN: if (flatshade_first) { for (i = 2; i < nr; i += 1) { /* emit first non-spoke vertex as first vertex */ setup->triangle( setup, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride), get_vert(vertex_buffer, indices[0], stride) ); } } else { for (i = 2; i < nr; i += 1) { /* emit last non-spoke vertex as last vertex */ setup->triangle( setup, get_vert(vertex_buffer, indices[0], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } } break; case PIPE_PRIM_QUADS: /* GL quads don't follow provoking vertex convention */ if (flatshade_first) { /* emit last quad vertex as first triangle vertex */ for (i = 3; i < nr; i += 4) { setup->triangle( setup, get_vert(vertex_buffer, indices[i-0], stride), get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-2], stride) ); setup->triangle( setup, get_vert(vertex_buffer, indices[i-0], stride), get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-1], stride) ); } } else { /* emit last quad vertex as last triangle vertex */ for (i = 3; i < nr; i += 4) { setup->triangle( setup, get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-0], stride) ); setup->triangle( setup, get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } } break; case PIPE_PRIM_QUAD_STRIP: /* GL quad strips don't follow provoking vertex convention */ if (flatshade_first) { /* emit last quad vertex as first triangle vertex */ for (i = 3; i < nr; i += 2) { setup->triangle( setup, get_vert(vertex_buffer, indices[i-0], stride), get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-2], stride) ); setup->triangle( setup, get_vert(vertex_buffer, indices[i-0], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-3], stride) ); } } else { /* emit last quad vertex as last triangle vertex */ for (i = 3; i < nr; i += 2) { setup->triangle( setup, get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-2], stride), get_vert(vertex_buffer, indices[i-0], stride) ); setup->triangle( setup, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-3], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } } break; case PIPE_PRIM_POLYGON: /* Almost same as tri fan but the _first_ vertex specifies the flat * shading color. */ if (flatshade_first) { /* emit first polygon vertex as first triangle vertex */ for (i = 2; i < nr; i += 1) { setup->triangle( setup, get_vert(vertex_buffer, indices[0], stride), get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride) ); } } else { /* emit first polygon vertex as last triangle vertex */ for (i = 2; i < nr; i += 1) { setup->triangle( setup, get_vert(vertex_buffer, indices[i-1], stride), get_vert(vertex_buffer, indices[i-0], stride), get_vert(vertex_buffer, indices[0], stride) ); } } break; default: assert(0); } } /** * This function is hit when the draw module is working in pass-through mode. * It's up to us to convert the vertex array into point/line/tri prims. */ static void lp_setup_draw_arrays(struct vbuf_render *vbr, uint start, uint nr) { struct lp_setup_context *setup = lp_setup_context(vbr); const unsigned stride = setup->vertex_info->size * sizeof(float); const void *vertex_buffer = (void *) get_vert(setup->vertex_buffer, start, stride); const boolean flatshade_first = setup->flatshade_first; unsigned i; if (!lp_setup_update_state(setup, TRUE)) return; switch (setup->prim) { case PIPE_PRIM_POINTS: for (i = 0; i < nr; i++) { setup->point( setup, get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_LINES: for (i = 1; i < nr; i += 2) { setup->line( setup, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_LINE_STRIP: for (i = 1; i < nr; i ++) { setup->line( setup, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_LINE_LOOP: for (i = 1; i < nr; i ++) { setup->line( setup, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } if (nr) { setup->line( setup, get_vert(vertex_buffer, nr-1, stride), get_vert(vertex_buffer, 0, stride) ); } break; case PIPE_PRIM_TRIANGLES: for (i = 2; i < nr; i += 3) { setup->triangle( setup, get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } break; case PIPE_PRIM_TRIANGLE_STRIP: if (flatshade_first) { for (i = 2; i < nr; i++) { /* emit first triangle vertex as first triangle vertex */ setup->triangle( setup, get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i+(i&1)-1, stride), get_vert(vertex_buffer, i-(i&1), stride) ); } } else { for (i = 2; i < nr; i++) { /* emit last triangle vertex as last triangle vertex */ setup->triangle( setup, get_vert(vertex_buffer, i+(i&1)-2, stride), get_vert(vertex_buffer, i-(i&1)-1, stride), get_vert(vertex_buffer, i-0, stride) ); } } break; case PIPE_PRIM_TRIANGLE_FAN: if (flatshade_first) { for (i = 2; i < nr; i += 1) { /* emit first non-spoke vertex as first vertex */ setup->triangle( setup, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride), get_vert(vertex_buffer, 0, stride) ); } } else { for (i = 2; i < nr; i += 1) { /* emit last non-spoke vertex as last vertex */ setup->triangle( setup, get_vert(vertex_buffer, 0, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } } break; case PIPE_PRIM_QUADS: /* GL quads don't follow provoking vertex convention */ if (flatshade_first) { /* emit last quad vertex as first triangle vertex */ for (i = 3; i < nr; i += 4) { setup->triangle( setup, get_vert(vertex_buffer, i-0, stride), get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-2, stride) ); setup->triangle( setup, get_vert(vertex_buffer, i-0, stride), get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-1, stride) ); } } else { /* emit last quad vertex as last triangle vertex */ for (i = 3; i < nr; i += 4) { setup->triangle( setup, get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-0, stride) ); setup->triangle( setup, get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } } break; case PIPE_PRIM_QUAD_STRIP: /* GL quad strips don't follow provoking vertex convention */ if (flatshade_first) { /* emit last quad vertex as first triangle vertex */ for (i = 3; i < nr; i += 2) { setup->triangle( setup, get_vert(vertex_buffer, i-0, stride), get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-2, stride) ); setup->triangle( setup, get_vert(vertex_buffer, i-0, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-3, stride) ); } } else { /* emit last quad vertex as last triangle vertex */ for (i = 3; i < nr; i += 2) { setup->triangle( setup, get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-2, stride), get_vert(vertex_buffer, i-0, stride) ); setup->triangle( setup, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-3, stride), get_vert(vertex_buffer, i-0, stride) ); } } break; case PIPE_PRIM_POLYGON: /* Almost same as tri fan but the _first_ vertex specifies the flat * shading color. */ if (flatshade_first) { /* emit first polygon vertex as first triangle vertex */ for (i = 2; i < nr; i += 1) { setup->triangle( setup, get_vert(vertex_buffer, 0, stride), get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride) ); } } else { /* emit first polygon vertex as last triangle vertex */ for (i = 2; i < nr; i += 1) { setup->triangle( setup, get_vert(vertex_buffer, i-1, stride), get_vert(vertex_buffer, i-0, stride), get_vert(vertex_buffer, 0, stride) ); } } break; default: assert(0); } } static void lp_setup_vbuf_destroy(struct vbuf_render *vbr) { struct lp_setup_context *setup = lp_setup_context(vbr); if (setup->vertex_buffer) { align_free(setup->vertex_buffer); setup->vertex_buffer = NULL; } lp_setup_destroy(setup); } static void lp_setup_so_info(struct vbuf_render *vbr, uint primitives, uint vertices, uint prim_generated) { struct lp_setup_context *setup = lp_setup_context(vbr); struct llvmpipe_context *lp = llvmpipe_context(setup->pipe); lp->so_stats.num_primitives_written += primitives; lp->so_stats.primitives_storage_needed = vertices * 4 /*sizeof(float|int32)*/ * 4 /*x,y,z,w*/; lp->num_primitives_generated += prim_generated; } /** * Create the post-transform vertex handler for the given context. */ void lp_setup_init_vbuf(struct lp_setup_context *setup) { setup->base.max_indices = LP_MAX_VBUF_INDEXES; setup->base.max_vertex_buffer_bytes = LP_MAX_VBUF_SIZE; setup->base.get_vertex_info = lp_setup_get_vertex_info; setup->base.allocate_vertices = lp_setup_allocate_vertices; setup->base.map_vertices = lp_setup_map_vertices; setup->base.unmap_vertices = lp_setup_unmap_vertices; setup->base.set_primitive = lp_setup_set_primitive; setup->base.draw_elements = lp_setup_draw_elements; setup->base.draw_arrays = lp_setup_draw_arrays; setup->base.release_vertices = lp_setup_release_vertices; setup->base.destroy = lp_setup_vbuf_destroy; setup->base.set_stream_output_info = lp_setup_so_info; }