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path: root/src/gallium/auxiliary/draw/draw_pipe_vbuf.c
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Diffstat (limited to 'src/gallium/auxiliary/draw/draw_pipe_vbuf.c')
-rw-r--r--src/gallium/auxiliary/draw/draw_pipe_vbuf.c496
1 files changed, 496 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_vbuf.c b/src/gallium/auxiliary/draw/draw_pipe_vbuf.c
new file mode 100644
index 0000000000..5ead25efff
--- /dev/null
+++ b/src/gallium/auxiliary/draw/draw_pipe_vbuf.c
@@ -0,0 +1,496 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Vertex buffer drawing stage.
+ *
+ * \author José Fonseca <jrfonsec@tungstengraphics.com>
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include "pipe/p_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_indices( struct vbuf_stage *vbuf );
+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_flush_vertices(vbuf);
+ vbuf_alloc_vertices(vbuf);
+ }
+
+ if (vbuf->nr_indices + nr > vbuf->max_indices )
+ vbuf_flush_indices(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) {
+ /* 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);
+ vbuf->translate->run(vbuf->translate, 0, 1, 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_set_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);
+
+ if (vbuf->vertex_size != vbuf->vinfo->size * sizeof(float)) {
+ vbuf_flush_vertices(vbuf);
+ 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;
+ unsigned output_format;
+ unsigned src_offset = (vbuf->vinfo->attrib[i].src_index * 4 * sizeof(float) );
+
+ switch (vbuf->vinfo->attrib[i].emit) {
+ case EMIT_4F:
+ output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+ emit_sz = 4 * sizeof(float);
+ break;
+ case EMIT_3F:
+ output_format = PIPE_FORMAT_R32G32B32_FLOAT;
+ emit_sz = 3 * sizeof(float);
+ break;
+ case EMIT_2F:
+ output_format = PIPE_FORMAT_R32G32_FLOAT;
+ emit_sz = 2 * sizeof(float);
+ break;
+ case EMIT_1F:
+ output_format = PIPE_FORMAT_R32_FLOAT;
+ emit_sz = 1 * sizeof(float);
+ break;
+ case EMIT_1F_PSIZE:
+ output_format = PIPE_FORMAT_R32_FLOAT;
+ emit_sz = 1 * sizeof(float);
+ src_buffer = 1;
+ src_offset = 0;
+ break;
+ case EMIT_4UB:
+ output_format = PIPE_FORMAT_B8G8R8A8_UNORM;
+ emit_sz = 4 * sizeof(ubyte);
+ break;
+ default:
+ assert(0);
+ output_format = PIPE_FORMAT_NONE;
+ emit_sz = 0;
+ break;
+ }
+
+ 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].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->vinfo->size * 4;
+
+ /* 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);
+ }
+
+ vbuf->point_size = vbuf->stage.draw->rasterizer->point_size;
+
+ /* Allocate new buffer?
+ */
+ if (!vbuf->vertices)
+ 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_indices( vbuf );
+ stage->tri = vbuf_tri;
+ vbuf_set_prim(vbuf, PIPE_PRIM_TRIANGLES);
+ 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_indices( vbuf );
+ stage->line = vbuf_line;
+ vbuf_set_prim(vbuf, PIPE_PRIM_LINES);
+ 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_indices( vbuf );
+ stage->point = vbuf_point;
+ vbuf_set_prim(vbuf, PIPE_PRIM_POINTS);
+ stage->point( stage, prim );
+}
+
+
+static void
+vbuf_flush_indices( struct vbuf_stage *vbuf )
+{
+ if(!vbuf->nr_indices)
+ return;
+
+ assert((uint) (vbuf->vertex_ptr - vbuf->vertices) ==
+ vbuf->nr_vertices * vbuf->vertex_size / sizeof(unsigned));
+
+ vbuf->render->draw(vbuf->render, vbuf->indices, vbuf->nr_indices);
+
+ vbuf->nr_indices = 0;
+}
+
+
+/**
+ * Flush existing vertex buffer and allocate a new one.
+ *
+ * XXX: We separate flush-on-index-full and flush-on-vb-full, but may
+ * raise issues uploading vertices if the hardware wants to flush when
+ * we flush.
+ */
+static void
+vbuf_flush_vertices( struct vbuf_stage *vbuf )
+{
+ if(vbuf->vertices) {
+ vbuf_flush_indices(vbuf);
+
+ /* 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->vertices,
+ vbuf->vertex_size,
+ vbuf->nr_vertices);
+ vbuf->max_vertices = vbuf->nr_vertices = 0;
+ vbuf->vertex_ptr = vbuf->vertices = NULL;
+
+ }
+}
+
+
+static void
+vbuf_alloc_vertices( struct vbuf_stage *vbuf )
+{
+ assert(!vbuf->nr_indices);
+ assert(!vbuf->vertices);
+
+ /* Allocate a new vertex buffer */
+ vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size;
+
+ /* even number */
+ vbuf->max_vertices = vbuf->max_vertices & ~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.
+ */
+ assert(vbuf->max_vertices < UNDEFINED_VERTEX_ID);
+
+ vbuf->vertices = (uint *) vbuf->render->allocate_vertices(vbuf->render,
+ (ushort) vbuf->vertex_size,
+ (ushort) vbuf->max_vertices);
+ vbuf->vertex_ptr = vbuf->vertices;
+}
+
+
+
+static void
+vbuf_flush( struct draw_stage *stage, unsigned flags )
+{
+ struct vbuf_stage *vbuf = vbuf_stage( stage );
+
+ vbuf_flush_indices( vbuf );
+
+ stage->point = vbuf_first_point;
+ stage->line = vbuf_first_line;
+ stage->tri = vbuf_first_tri;
+
+ if (flags & DRAW_FLUSH_BACKEND)
+ 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.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 = MAX2(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;
+}
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