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| /************************************************************************** |
| * |
| * Copyright 2007 VMware, Inc. |
| * 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 VMWARE 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * \file |
| * Vertex buffer drawing stage. |
| * |
| * \author Jose Fonseca <jfonseca@vmware.com> |
| * \author Keith Whitwell <keithw@vmware.com> |
| */ |
| |
| |
| #include "util/u_debug.h" |
| #include "util/u_math.h" |
| #include "util/u_memory.h" |
| |
| #include "draw_vbuf.h" |
| #include "draw_private.h" |
| #include "draw_vertex.h" |
| #include "draw_pipe.h" |
| #include "translate/translate.h" |
| #include "translate/translate_cache.h" |
| |
| |
| /** |
| * Vertex buffer emit stage. |
| */ |
| struct vbuf_stage { |
| struct draw_stage stage; /**< This must be first (base class) */ |
| |
| struct vbuf_render *render; |
| |
| const struct vertex_info *vinfo; |
| |
| /** Vertex size in bytes */ |
| unsigned vertex_size; |
| |
| struct translate *translate; |
| |
| /* FIXME: we have no guarantee that 'unsigned' is 32bit */ |
| |
| /** Vertices in hardware format */ |
| unsigned *vertices; |
| unsigned *vertex_ptr; |
| unsigned max_vertices; |
| unsigned nr_vertices; |
| |
| /** Indices */ |
| ushort *indices; |
| unsigned max_indices; |
| unsigned nr_indices; |
| |
| /* Cache point size somewhere it's address won't change: |
| */ |
| float point_size; |
| |
| struct translate_cache *cache; |
| }; |
| |
| |
| /** |
| * Basically a cast wrapper. |
| */ |
| static INLINE struct vbuf_stage * |
| vbuf_stage( struct draw_stage *stage ) |
| { |
| assert(stage); |
| return (struct vbuf_stage *)stage; |
| } |
| |
| |
| static void vbuf_flush_vertices( struct vbuf_stage *vbuf ); |
| static void vbuf_alloc_vertices( struct vbuf_stage *vbuf ); |
| |
| |
| static INLINE boolean |
| overflow( void *map, void *ptr, unsigned bytes, unsigned bufsz ) |
| { |
| unsigned long used = (unsigned long) ((char *)ptr - (char *)map); |
| return (used + bytes) > bufsz; |
| } |
| |
| |
| static INLINE void |
| check_space( struct vbuf_stage *vbuf, unsigned nr ) |
| { |
| if (vbuf->nr_vertices + nr > vbuf->max_vertices || |
| vbuf->nr_indices + nr > vbuf->max_indices) |
| { |
| vbuf_flush_vertices( vbuf ); |
| vbuf_alloc_vertices( vbuf ); |
| } |
| } |
| |
| |
| |
| |
| /** |
| * Extract the needed fields from post-transformed vertex and emit |
| * a hardware(driver) vertex. |
| * Recall that the vertices are constructed by the 'draw' module and |
| * have a couple of slots at the beginning (1-dword header, 4-dword |
| * clip pos) that we ignore here. We only use the vertex->data[] fields. |
| */ |
| static INLINE ushort |
| emit_vertex( struct vbuf_stage *vbuf, |
| struct vertex_header *vertex ) |
| { |
| if (vertex->vertex_id == UNDEFINED_VERTEX_ID && vbuf->vertex_ptr) { |
| /* Hmm - vertices are emitted one at a time - better make sure |
| * set_buffer is efficient. Consider a special one-shot mode for |
| * translate. |
| */ |
| /* Note: we really do want data[0] here, not data[pos]: |
| */ |
| vbuf->translate->set_buffer(vbuf->translate, 0, vertex->data[0], 0, ~0); |
| vbuf->translate->run(vbuf->translate, 0, 1, 0, 0, vbuf->vertex_ptr); |
| |
| if (0) draw_dump_emitted_vertex(vbuf->vinfo, (uint8_t *)vbuf->vertex_ptr); |
| |
| vbuf->vertex_ptr += vbuf->vertex_size/4; |
| vertex->vertex_id = vbuf->nr_vertices++; |
| } |
| |
| return (ushort)vertex->vertex_id; |
| } |
| |
| |
| static void |
| vbuf_tri( struct draw_stage *stage, |
| struct prim_header *prim ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| unsigned i; |
| |
| check_space( vbuf, 3 ); |
| |
| for (i = 0; i < 3; i++) { |
| vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); |
| } |
| } |
| |
| |
| static void |
| vbuf_line( struct draw_stage *stage, |
| struct prim_header *prim ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| unsigned i; |
| |
| check_space( vbuf, 2 ); |
| |
| for (i = 0; i < 2; i++) { |
| vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); |
| } |
| } |
| |
| |
| static void |
| vbuf_point( struct draw_stage *stage, |
| struct prim_header *prim ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| |
| check_space( vbuf, 1 ); |
| |
| vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] ); |
| } |
| |
| |
| |
| |
| /** |
| * Set the prim type for subsequent vertices. |
| * This may result in a new vertex size. The existing vbuffer (if any) |
| * will be flushed if needed and a new one allocated. |
| */ |
| static void |
| vbuf_start_prim( struct vbuf_stage *vbuf, uint prim ) |
| { |
| struct translate_key hw_key; |
| unsigned dst_offset; |
| unsigned i; |
| |
| vbuf->render->set_primitive(vbuf->render, prim); |
| |
| /* Must do this after set_primitive() above: |
| * |
| * XXX: need some state managment to track when this needs to be |
| * recalculated. The driver should tell us whether there was a |
| * state change. |
| */ |
| vbuf->vinfo = vbuf->render->get_vertex_info(vbuf->render); |
| vbuf->vertex_size = vbuf->vinfo->size * sizeof(float); |
| |
| /* Translate from pipeline vertices to hw vertices. |
| */ |
| dst_offset = 0; |
| |
| for (i = 0; i < vbuf->vinfo->num_attribs; i++) { |
| unsigned emit_sz = 0; |
| unsigned src_buffer = 0; |
| enum pipe_format output_format; |
| unsigned src_offset = (vbuf->vinfo->attrib[i].src_index * 4 * sizeof(float) ); |
| |
| output_format = draw_translate_vinfo_format(vbuf->vinfo->attrib[i].emit); |
| emit_sz = draw_translate_vinfo_size(vbuf->vinfo->attrib[i].emit); |
| |
| /* doesn't handle EMIT_OMIT */ |
| assert(emit_sz != 0); |
| |
| if (vbuf->vinfo->attrib[i].emit == EMIT_1F_PSIZE) { |
| src_buffer = 1; |
| src_offset = 0; |
| } |
| |
| hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL; |
| hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
| hw_key.element[i].input_buffer = src_buffer; |
| hw_key.element[i].input_offset = src_offset; |
| hw_key.element[i].instance_divisor = 0; |
| hw_key.element[i].output_format = output_format; |
| hw_key.element[i].output_offset = dst_offset; |
| |
| dst_offset += emit_sz; |
| } |
| |
| hw_key.nr_elements = vbuf->vinfo->num_attribs; |
| hw_key.output_stride = vbuf->vertex_size; |
| |
| /* Don't bother with caching at this stage: |
| */ |
| if (!vbuf->translate || |
| translate_key_compare(&vbuf->translate->key, &hw_key) != 0) |
| { |
| translate_key_sanitize(&hw_key); |
| vbuf->translate = translate_cache_find(vbuf->cache, &hw_key); |
| |
| vbuf->translate->set_buffer(vbuf->translate, 1, &vbuf->point_size, 0, ~0); |
| } |
| |
| vbuf->point_size = vbuf->stage.draw->rasterizer->point_size; |
| |
| /* Allocate new buffer? |
| */ |
| assert(vbuf->vertices == NULL); |
| vbuf_alloc_vertices(vbuf); |
| } |
| |
| |
| static void |
| vbuf_first_tri( struct draw_stage *stage, |
| struct prim_header *prim ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| |
| vbuf_flush_vertices( vbuf ); |
| vbuf_start_prim(vbuf, PIPE_PRIM_TRIANGLES); |
| stage->tri = vbuf_tri; |
| stage->tri( stage, prim ); |
| } |
| |
| |
| static void |
| vbuf_first_line( struct draw_stage *stage, |
| struct prim_header *prim ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| |
| vbuf_flush_vertices( vbuf ); |
| vbuf_start_prim(vbuf, PIPE_PRIM_LINES); |
| stage->line = vbuf_line; |
| stage->line( stage, prim ); |
| } |
| |
| |
| static void |
| vbuf_first_point( struct draw_stage *stage, |
| struct prim_header *prim ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| |
| vbuf_flush_vertices(vbuf); |
| vbuf_start_prim(vbuf, PIPE_PRIM_POINTS); |
| stage->point = vbuf_point; |
| stage->point( stage, prim ); |
| } |
| |
| |
| |
| /** |
| * Flush existing vertex buffer and allocate a new one. |
| */ |
| static void |
| vbuf_flush_vertices( struct vbuf_stage *vbuf ) |
| { |
| if(vbuf->vertices) { |
| |
| vbuf->render->unmap_vertices( vbuf->render, 0, vbuf->nr_vertices - 1 ); |
| |
| if (vbuf->nr_indices) |
| { |
| vbuf->render->draw_elements(vbuf->render, |
| vbuf->indices, |
| vbuf->nr_indices ); |
| |
| vbuf->nr_indices = 0; |
| } |
| |
| /* Reset temporary vertices ids */ |
| if(vbuf->nr_vertices) |
| draw_reset_vertex_ids( vbuf->stage.draw ); |
| |
| /* Free the vertex buffer */ |
| vbuf->render->release_vertices( vbuf->render ); |
| |
| vbuf->max_vertices = vbuf->nr_vertices = 0; |
| vbuf->vertex_ptr = vbuf->vertices = NULL; |
| } |
| |
| /* Reset point/line/tri function pointers. |
| * If (for example) we transition from points to tris and back to points |
| * again, we need to call the vbuf_first_point() function again to flush |
| * the triangles before drawing more points. This can happen when drawing |
| * with front polygon mode = filled and back polygon mode = line or point. |
| */ |
| vbuf->stage.point = vbuf_first_point; |
| vbuf->stage.line = vbuf_first_line; |
| vbuf->stage.tri = vbuf_first_tri; |
| } |
| |
| |
| static void |
| vbuf_alloc_vertices( struct vbuf_stage *vbuf ) |
| { |
| if (vbuf->vertex_ptr) { |
| assert(!vbuf->nr_indices); |
| assert(!vbuf->vertices); |
| } |
| |
| /* Allocate a new vertex buffer */ |
| vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size; |
| |
| if(vbuf->max_vertices >= UNDEFINED_VERTEX_ID) |
| vbuf->max_vertices = UNDEFINED_VERTEX_ID - 1; |
| |
| /* Must always succeed -- driver gives us a |
| * 'max_vertex_buffer_bytes' which it guarantees it can allocate, |
| * and it will flush itself if necessary to do so. If this does |
| * fail, we are basically without usable hardware. |
| */ |
| vbuf->render->allocate_vertices(vbuf->render, |
| (ushort) vbuf->vertex_size, |
| (ushort) vbuf->max_vertices); |
| |
| vbuf->vertices = (uint *) vbuf->render->map_vertices( vbuf->render ); |
| |
| vbuf->vertex_ptr = vbuf->vertices; |
| } |
| |
| |
| |
| static void |
| vbuf_flush( struct draw_stage *stage, unsigned flags ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| |
| vbuf_flush_vertices( vbuf ); |
| } |
| |
| |
| static void |
| vbuf_reset_stipple_counter( struct draw_stage *stage ) |
| { |
| /* XXX: Need to do something here for hardware with linestipple. |
| */ |
| (void) stage; |
| } |
| |
| |
| static void vbuf_destroy( struct draw_stage *stage ) |
| { |
| struct vbuf_stage *vbuf = vbuf_stage( stage ); |
| |
| if(vbuf->indices) |
| align_free( vbuf->indices ); |
| |
| if (vbuf->render) |
| vbuf->render->destroy( vbuf->render ); |
| |
| if (vbuf->cache) |
| translate_cache_destroy(vbuf->cache); |
| |
| FREE( stage ); |
| } |
| |
| |
| /** |
| * Create a new primitive vbuf/render stage. |
| */ |
| struct draw_stage *draw_vbuf_stage( struct draw_context *draw, |
| struct vbuf_render *render ) |
| { |
| struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage); |
| if (vbuf == NULL) |
| goto fail; |
| |
| vbuf->stage.draw = draw; |
| vbuf->stage.name = "vbuf"; |
| vbuf->stage.point = vbuf_first_point; |
| vbuf->stage.line = vbuf_first_line; |
| vbuf->stage.tri = vbuf_first_tri; |
| vbuf->stage.flush = vbuf_flush; |
| vbuf->stage.reset_stipple_counter = vbuf_reset_stipple_counter; |
| vbuf->stage.destroy = vbuf_destroy; |
| |
| vbuf->render = render; |
| vbuf->max_indices = MIN2(render->max_indices, UNDEFINED_VERTEX_ID-1); |
| |
| vbuf->indices = (ushort *) align_malloc( vbuf->max_indices * |
| sizeof(vbuf->indices[0]), |
| 16 ); |
| if (!vbuf->indices) |
| goto fail; |
| |
| vbuf->cache = translate_cache_create(); |
| if (!vbuf->cache) |
| goto fail; |
| |
| |
| vbuf->vertices = NULL; |
| vbuf->vertex_ptr = vbuf->vertices; |
| |
| return &vbuf->stage; |
| |
| fail: |
| if (vbuf) |
| vbuf_destroy(&vbuf->stage); |
| |
| return NULL; |
| } |