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path: root/src/gallium/drivers/softpipe/sp_prim_vbuf.c
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Diffstat (limited to 'src/gallium/drivers/softpipe/sp_prim_vbuf.c')
-rw-r--r--src/gallium/drivers/softpipe/sp_prim_vbuf.c405
1 files changed, 405 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_prim_vbuf.c b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
new file mode 100644
index 0000000000..425e13cd28
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
@@ -0,0 +1,405 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * Post-transform vertex buffering. This is an optional part of the
+ * softpipe rendering pipeline.
+ * Probably not desired in general, but useful for testing/debuggin.
+ * Enabled/Disabled with SP_VBUF env var.
+ *
+ * Authors
+ * Brian Paul
+ */
+
+
+#include "sp_context.h"
+#include "sp_state.h"
+#include "sp_prim_vbuf.h"
+#include "sp_prim_setup.h"
+#include "sp_setup.h"
+#include "draw/draw_context.h"
+#include "draw/draw_vbuf.h"
+#include "util/u_memory.h"
+
+
+#define SP_MAX_VBUF_INDEXES 1024
+#define SP_MAX_VBUF_SIZE 4096
+
+typedef const float (*cptrf4)[4];
+
+/**
+ * Subclass of vbuf_render.
+ */
+struct softpipe_vbuf_render
+{
+ struct vbuf_render base;
+ struct softpipe_context *softpipe;
+ uint prim;
+ uint vertex_size;
+ void *vertex_buffer;
+};
+
+
+/** cast wrapper */
+static struct softpipe_vbuf_render *
+softpipe_vbuf_render(struct vbuf_render *vbr)
+{
+ return (struct softpipe_vbuf_render *) vbr;
+}
+
+
+static const struct vertex_info *
+sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ return softpipe_get_vbuf_vertex_info(cvbr->softpipe);
+}
+
+
+static void *
+sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
+ ushort vertex_size, ushort nr_vertices)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ assert(!cvbr->vertex_buffer);
+ cvbr->vertex_buffer = align_malloc(vertex_size * nr_vertices, 16);
+ cvbr->vertex_size = vertex_size;
+ return cvbr->vertex_buffer;
+}
+
+
+static void
+sp_vbuf_release_vertices(struct vbuf_render *vbr, void *vertices,
+ unsigned vertex_size, unsigned vertices_used)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ align_free(vertices);
+ assert(vertices == cvbr->vertex_buffer);
+ cvbr->vertex_buffer = NULL;
+}
+
+
+static boolean
+sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+
+ /* XXX: break this dependency - make setup_context live under
+ * softpipe, rename the old "setup" draw stage to something else.
+ */
+ struct setup_context *setup_ctx = sp_draw_setup_context(cvbr->softpipe->setup);
+
+ setup_prepare( setup_ctx );
+
+
+
+ cvbr->prim = prim;
+ return TRUE;
+
+}
+
+
+static INLINE cptrf4 get_vert( const void *vertex_buffer,
+ int index,
+ int stride )
+{
+ return (cptrf4)((char *)vertex_buffer + index * stride);
+}
+
+
+static void
+sp_vbuf_draw(struct vbuf_render *vbr, const ushort *indices, uint nr)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ struct softpipe_context *softpipe = cvbr->softpipe;
+ unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
+ unsigned i;
+ const void *vertex_buffer = cvbr->vertex_buffer;
+
+ /* XXX: break this dependency - make setup_context live under
+ * softpipe, rename the old "setup" draw stage to something else.
+ */
+ struct draw_stage *setup = softpipe->setup;
+ struct setup_context *setup_ctx = sp_draw_setup_context(softpipe->setup);
+
+
+ switch (cvbr->prim) {
+ case PIPE_PRIM_POINTS:
+ for (i = 0; i < nr; i++) {
+ setup_point( setup_ctx,
+ get_vert(vertex_buffer, indices[i-0], stride) );
+ }
+ break;
+
+ case PIPE_PRIM_LINES:
+ for (i = 1; i < nr; i += 2) {
+ setup_line( setup_ctx,
+ 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_ctx,
+ 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_ctx,
+ get_vert(vertex_buffer, indices[i-1], stride),
+ get_vert(vertex_buffer, indices[i-0], stride) );
+ }
+ if (nr) {
+ setup_line( setup_ctx,
+ 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_tri( setup_ctx,
+ 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:
+ for (i = 2; i < nr; i += 1) {
+ setup_tri( setup_ctx,
+ 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:
+ case PIPE_PRIM_POLYGON:
+ for (i = 2; i < nr; i += 1) {
+ setup_tri( setup_ctx,
+ 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:
+ for (i = 3; i < nr; i += 4) {
+ setup_tri( setup_ctx,
+ 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_tri( setup_ctx,
+ 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:
+ for (i = 3; i < nr; i += 2) {
+ setup_tri( setup_ctx,
+ 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_tri( setup_ctx,
+ 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;
+ default:
+ assert(0);
+ }
+
+ /* XXX: why are we calling this??? If we had to call something, it
+ * would be a function in sp_setup.c:
+ */
+ sp_draw_flush( setup );
+}
+
+
+/**
+ * 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
+sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ struct softpipe_context *softpipe = cvbr->softpipe;
+ struct draw_stage *setup = softpipe->setup;
+ const void *vertex_buffer = NULL;
+ const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
+ unsigned i;
+ struct setup_context *setup_ctx = sp_draw_setup_context(setup);
+
+ vertex_buffer = (void *)get_vert(cvbr->vertex_buffer, start, stride);
+
+ switch (cvbr->prim) {
+ case PIPE_PRIM_POINTS:
+ for (i = 0; i < nr; i++) {
+ setup_point( setup_ctx,
+ get_vert(vertex_buffer, i-0, stride) );
+ }
+ break;
+
+ case PIPE_PRIM_LINES:
+ for (i = 1; i < nr; i += 2) {
+ setup_line( setup_ctx,
+ 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_ctx,
+ 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_ctx,
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-0, stride) );
+ }
+ if (nr) {
+ setup_line( setup_ctx,
+ 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_tri( setup_ctx,
+ 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:
+ for (i = 2; i < nr; i += 1) {
+ setup_tri( setup_ctx,
+ 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:
+ case PIPE_PRIM_POLYGON:
+ for (i = 2; i < nr; i += 1) {
+ setup_tri( setup_ctx,
+ 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:
+ for (i = 3; i < nr; i += 4) {
+ setup_tri( setup_ctx,
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-0, stride));
+
+ setup_tri( setup_ctx,
+ 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:
+ for (i = 3; i < nr; i += 2) {
+ setup_tri( setup_ctx,
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-2, stride),
+ get_vert(vertex_buffer, i-0, stride));
+
+ setup_tri( setup_ctx,
+ get_vert(vertex_buffer, i-1, stride),
+ get_vert(vertex_buffer, i-3, stride),
+ get_vert(vertex_buffer, i-0, stride));
+ }
+ break;
+ default:
+ assert(0);
+ }
+}
+
+
+
+static void
+sp_vbuf_destroy(struct vbuf_render *vbr)
+{
+ struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+ cvbr->softpipe->vbuf_render = NULL;
+ FREE(cvbr);
+}
+
+
+/**
+ * Initialize the post-transform vertex buffer information for the given
+ * context.
+ */
+void
+sp_init_vbuf(struct softpipe_context *sp)
+{
+ assert(sp->draw);
+
+ sp->vbuf_render = CALLOC_STRUCT(softpipe_vbuf_render);
+
+ sp->vbuf_render->base.max_indices = SP_MAX_VBUF_INDEXES;
+ sp->vbuf_render->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
+
+ sp->vbuf_render->base.get_vertex_info = sp_vbuf_get_vertex_info;
+ sp->vbuf_render->base.allocate_vertices = sp_vbuf_allocate_vertices;
+ sp->vbuf_render->base.set_primitive = sp_vbuf_set_primitive;
+ sp->vbuf_render->base.draw = sp_vbuf_draw;
+ sp->vbuf_render->base.draw_arrays = sp_vbuf_draw_arrays;
+ sp->vbuf_render->base.release_vertices = sp_vbuf_release_vertices;
+ sp->vbuf_render->base.destroy = sp_vbuf_destroy;
+
+ sp->vbuf_render->softpipe = sp;
+
+ sp->vbuf = draw_vbuf_stage(sp->draw, &sp->vbuf_render->base);
+
+ draw_set_rasterize_stage(sp->draw, sp->vbuf);
+
+ draw_set_render(sp->draw, &sp->vbuf_render->base);
+}
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