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path: root/src/mesa/pipe/softpipe/sp_draw.c
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Diffstat (limited to 'src/mesa/pipe/softpipe/sp_draw.c')
-rw-r--r--src/mesa/pipe/softpipe/sp_draw.c696
1 files changed, 696 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/sp_draw.c b/src/mesa/pipe/softpipe/sp_draw.c
new file mode 100644
index 0000000000..5813e37776
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_draw.c
@@ -0,0 +1,696 @@
+/**************************************************************************
+ *
+ * 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 <keith@tungstengraphics.com>
+ */
+
+#include "imports.h"
+
+#include "tnl/t_context.h"
+
+#include "sp_context.h"
+#include "sp_prim.h"
+#include "sp_headers.h"
+#include "sp_draw.h"
+
+/* This file is a temporary set of hooks to allow us to use the tnl/
+ * and vf/ modules until we have replacements in pipe.
+ */
+
+
+struct draw_context
+{
+ struct softpipe_context *softpipe;
+
+ struct vf_attr_map attrs[VF_ATTRIB_MAX];
+ GLuint nr_attrs;
+ GLuint vertex_size;
+ struct vertex_fetch *vf;
+
+ GLubyte *verts;
+ GLuint nr_vertices;
+ GLboolean in_vb;
+
+ GLenum prim;
+
+ /* Helper for tnl:
+ */
+ GLvector4f header;
+};
+
+
+static struct vertex_header *get_vertex( struct draw_context *pipe,
+ GLuint i )
+{
+ return (struct vertex_header *)(pipe->verts + i * pipe->vertex_size);
+}
+
+
+
+static void draw_allocate_vertices( struct draw_context *draw,
+ GLuint nr_vertices )
+{
+ draw->nr_vertices = nr_vertices;
+ draw->verts = MALLOC( nr_vertices * draw->vertex_size );
+
+ draw->softpipe->prim.first->begin( draw->softpipe->prim.first );
+}
+
+static void draw_set_prim( struct draw_context *draw,
+ GLenum prim )
+{
+ draw->prim = prim;
+
+ /* Not done yet - need to force edgeflags to 1 in strip/fan
+ * primitives.
+ */
+#if 0
+ switch (prim) {
+ case GL_TRIANGLES:
+ case GL_POLYGON:
+ case GL_QUADS:
+ case GL_QUAD_STRIP: /* yes, we need this */
+ respect_edgeflags( pipe, GL_TRUE );
+ break;
+
+ default:
+ respect_edgeflags( pipe, GL_FALSE );
+ break;
+ }
+#endif
+}
+
+
+
+static void do_quad( struct prim_stage *first,
+ struct vertex_header *v0,
+ struct vertex_header *v1,
+ struct vertex_header *v2,
+ struct vertex_header *v3 )
+{
+ struct prim_header prim;
+
+ {
+ GLuint tmp = v1->edgeflag;
+ v1->edgeflag = 0;
+
+ prim.v[0] = v0;
+ prim.v[1] = v1;
+ prim.v[2] = v3;
+ first->tri( first, &prim );
+
+ v1->edgeflag = tmp;
+ }
+
+ {
+ GLuint tmp = v3->edgeflag;
+ v3->edgeflag = 0;
+
+ prim.v[0] = v1;
+ prim.v[1] = v2;
+ prim.v[2] = v3;
+ first->tri( first, &prim );
+
+ v3->edgeflag = tmp;
+ }
+}
+
+
+
+
+static void draw_indexed_prim( struct draw_context *draw,
+ const GLuint *elts,
+ GLuint count )
+{
+ struct prim_stage * const first = draw->softpipe->prim.first;
+ struct prim_header prim;
+ GLuint i;
+
+ prim.det = 0; /* valid from cull stage onwards */
+ prim.v[0] = 0;
+ prim.v[1] = 0;
+ prim.v[2] = 0;
+
+ switch (draw->prim) {
+ case GL_POINTS:
+ for (i = 0; i < count; i ++) {
+ prim.v[0] = get_vertex( draw, elts[i] );
+
+ first->point( first, &prim );
+ }
+ break;
+
+ case GL_LINES:
+ for (i = 0; i+1 < count; i += 2) {
+ prim.v[0] = get_vertex( draw, elts[i + 0] );
+ prim.v[1] = get_vertex( draw, elts[i + 1] );
+
+ first->line( first, &prim );
+ }
+ break;
+
+ case GL_LINE_LOOP:
+ if (count >= 2) {
+ for (i = 1; i < count; i++) {
+ prim.v[0] = get_vertex( draw, elts[i-1] );
+ prim.v[1] = get_vertex( draw, elts[i] );
+ first->line( first, &prim );
+ }
+
+ prim.v[0] = get_vertex( draw, elts[count-1] );
+ prim.v[1] = get_vertex( draw, elts[0] );
+ first->line( first, &prim );
+ }
+ break;
+
+ case GL_LINE_STRIP:
+ /* I'm guessing it will be necessary to have something like a
+ * render->reset_line_stipple() method to properly support
+ * splitting strips into primitives like this. Alternately we
+ * could just scan ahead to find individual clipped lines and
+ * otherwise leave the strip intact - that might be better, but
+ * require more complex code here.
+ */
+ if (count >= 2) {
+ prim.v[0] = 0;
+ prim.v[1] = get_vertex( draw, elts[0] );
+
+ for (i = 1; i < count; i++) {
+ prim.v[0] = prim.v[1];
+ prim.v[1] = get_vertex( draw, elts[i] );
+
+ first->line( first, &prim );
+ }
+ }
+ break;
+
+ case GL_TRIANGLES:
+ for (i = 0; i+2 < count; i += 3) {
+ prim.v[0] = get_vertex( draw, elts[i + 0] );
+ prim.v[1] = get_vertex( draw, elts[i + 1] );
+ prim.v[2] = get_vertex( draw, elts[i + 2] );
+
+ first->tri( first, &prim );
+ }
+ break;
+
+ case GL_TRIANGLE_STRIP:
+ for (i = 0; i+2 < count; i++) {
+ if (i & 1) {
+ prim.v[0] = get_vertex( draw, elts[i + 1] );
+ prim.v[1] = get_vertex( draw, elts[i + 0] );
+ prim.v[2] = get_vertex( draw, elts[i + 2] );
+ }
+ else {
+ prim.v[0] = get_vertex( draw, elts[i + 0] );
+ prim.v[1] = get_vertex( draw, elts[i + 1] );
+ prim.v[2] = get_vertex( draw, elts[i + 2] );
+ }
+
+ first->tri( first, &prim );
+ }
+ break;
+
+ case GL_TRIANGLE_FAN:
+ if (count >= 3) {
+ prim.v[0] = get_vertex( draw, elts[0] );
+ prim.v[1] = 0;
+ prim.v[2] = get_vertex( draw, elts[1] );
+
+ for (i = 0; i+2 < count; i++) {
+ prim.v[1] = prim.v[2];
+ prim.v[2] = get_vertex( draw, elts[i+2] );
+
+ first->tri( first, &prim );
+ }
+ }
+ break;
+
+ case GL_QUADS:
+ for (i = 0; i+3 < count; i += 4) {
+ do_quad( first,
+ get_vertex( draw, elts[i + 0] ),
+ get_vertex( draw, elts[i + 1] ),
+ get_vertex( draw, elts[i + 2] ),
+ get_vertex( draw, elts[i + 3] ));
+ }
+ break;
+
+ case GL_QUAD_STRIP:
+ for (i = 0; i+3 < count; i += 2) {
+ do_quad( first,
+ get_vertex( draw, elts[i + 2] ),
+ get_vertex( draw, elts[i + 0] ),
+ get_vertex( draw, elts[i + 1] ),
+ get_vertex( draw, elts[i + 3] ));
+ }
+ break;
+
+
+ case GL_POLYGON:
+ if (count >= 3) {
+ prim.v[0] = 0;
+ prim.v[1] = get_vertex( draw, elts[1] );
+ prim.v[2] = get_vertex( draw, elts[0] );
+
+ for (i = 0; i+2 < count; i++) {
+ prim.v[0] = prim.v[1];
+ prim.v[1] = get_vertex( draw, elts[i+2] );
+
+ first->tri( first, &prim );
+ }
+ }
+ break;
+
+ default:
+ assert(0);
+ break;
+ }
+}
+
+static void draw_prim( struct draw_context *draw,
+ GLuint start,
+ GLuint count )
+{
+ struct prim_stage * const first = draw->softpipe->prim.first;
+ struct prim_header prim;
+ GLuint i;
+
+// _mesa_printf("%s (%d) %d/%d\n", __FUNCTION__, draw->prim, start, count );
+
+ prim.det = 0; /* valid from cull stage onwards */
+ prim.v[0] = 0;
+ prim.v[1] = 0;
+ prim.v[2] = 0;
+
+ switch (draw->prim) {
+ case GL_POINTS:
+ for (i = 0; i < count; i ++) {
+ prim.v[0] = get_vertex( draw, start + i );
+ first->point( first, &prim );
+ }
+ break;
+
+ case GL_LINES:
+ for (i = 0; i+1 < count; i += 2) {
+ prim.v[0] = get_vertex( draw, start + i + 0 );
+ prim.v[1] = get_vertex( draw, start + i + 1 );
+
+ first->line( first, &prim );
+ }
+ break;
+
+ case GL_LINE_LOOP:
+ if (count >= 2) {
+ for (i = 1; i < count; i++) {
+ prim.v[0] = get_vertex( draw, start + i - 1 );
+ prim.v[1] = get_vertex( draw, start + i );
+ first->line( first, &prim );
+ }
+
+ prim.v[0] = get_vertex( draw, start + count - 1 );
+ prim.v[1] = get_vertex( draw, start + 0 );
+ first->line( first, &prim );
+ }
+ break;
+
+ case GL_LINE_STRIP:
+ if (count >= 2) {
+ prim.v[0] = 0;
+ prim.v[1] = get_vertex( draw, start + 0 );
+
+ for (i = 1; i < count; i++) {
+ prim.v[0] = prim.v[1];
+ prim.v[1] = get_vertex( draw, start + i );
+
+ first->line( first, &prim );
+ }
+ }
+ break;
+
+ case GL_TRIANGLES:
+ for (i = 0; i+2 < count; i += 3) {
+ prim.v[0] = get_vertex( draw, start + i + 0 );
+ prim.v[1] = get_vertex( draw, start + i + 1 );
+ prim.v[2] = get_vertex( draw, start + i + 2 );
+
+ first->tri( first, &prim );
+ }
+ break;
+
+ case GL_TRIANGLE_STRIP:
+ for (i = 0; i+2 < count; i++) {
+ if (i & 1) {
+ prim.v[0] = get_vertex( draw, start + i + 1 );
+ prim.v[1] = get_vertex( draw, start + i + 0 );
+ prim.v[2] = get_vertex( draw, start + i + 2 );
+ }
+ else {
+ prim.v[0] = get_vertex( draw, start + i + 0 );
+ prim.v[1] = get_vertex( draw, start + i + 1 );
+ prim.v[2] = get_vertex( draw, start + i + 2 );
+ }
+
+ first->tri( first, &prim );
+ }
+ break;
+
+ case GL_TRIANGLE_FAN:
+ if (count >= 3) {
+ prim.v[0] = get_vertex( draw, start + 0 );
+ prim.v[1] = 0;
+ prim.v[2] = get_vertex( draw, start + 1 );
+
+ for (i = 0; i+2 < count; i++) {
+ prim.v[1] = prim.v[2];
+ prim.v[2] = get_vertex( draw, start + i + 2 );
+
+ first->tri( first, &prim );
+ }
+ }
+ break;
+
+
+ case GL_QUADS:
+ for (i = 0; i+3 < count; i += 4) {
+ do_quad( first,
+ get_vertex( draw, start + i + 0 ),
+ get_vertex( draw, start + i + 1 ),
+ get_vertex( draw, start + i + 2 ),
+ get_vertex( draw, start + i + 3 ));
+ }
+ break;
+
+ case GL_QUAD_STRIP:
+ for (i = 0; i+3 < count; i += 2) {
+ do_quad( first,
+ get_vertex( draw, start + i + 2 ),
+ get_vertex( draw, start + i + 0 ),
+ get_vertex( draw, start + i + 1 ),
+ get_vertex( draw, start + i + 3 ));
+ }
+ break;
+
+ case GL_POLYGON:
+ if (count >= 3) {
+ prim.v[0] = 0;
+ prim.v[1] = get_vertex( draw, start + 1 );
+ prim.v[2] = get_vertex( draw, start + 0 );
+
+ for (i = 0; i+2 < count; i++) {
+ prim.v[0] = prim.v[1];
+ prim.v[1] = get_vertex( draw, start + i + 2 );
+
+ first->tri( first, &prim );
+ }
+ }
+ break;
+
+ default:
+ assert(0);
+ break;
+ }
+}
+
+
+static void draw_release_vertices( struct draw_context *draw )
+{
+ draw->softpipe->prim.first->end( draw->softpipe->prim.first );
+
+ FREE(draw->verts);
+ draw->verts = NULL;
+}
+
+
+struct header_dword {
+ GLuint clipmask:12;
+ GLuint edgeflag:1;
+ GLuint pad:19;
+};
+
+
+static void
+build_vertex_headers( struct draw_context *draw,
+ struct vertex_buffer *VB )
+{
+ if (draw->header.storage == NULL) {
+ draw->header.stride = sizeof(GLfloat);
+ draw->header.size = 1;
+ draw->header.storage = ALIGN_MALLOC( VB->Size * sizeof(GLfloat), 32 );
+ draw->header.data = draw->header.storage;
+ draw->header.count = 0;
+ draw->header.flags = VEC_SIZE_1 | VEC_MALLOC;
+ }
+
+ /* Build vertex header attribute.
+ *
+ */
+
+ {
+ GLuint i;
+ struct header_dword *header = (struct header_dword *)draw->header.storage;
+
+ /* yes its a hack
+ */
+ assert(sizeof(*header) == sizeof(GLfloat));
+
+ draw->header.count = VB->Count;
+
+ if (VB->EdgeFlag) {
+ for (i = 0; i < VB->Count; i++) {
+ header[i].clipmask = VB->ClipMask[i];
+ header[i].edgeflag = VB->EdgeFlag[i];
+ header[i].pad = 0;
+ }
+ }
+ else if (VB->ClipOrMask) {
+ for (i = 0; i < VB->Count; i++) {
+ header[i].clipmask = VB->ClipMask[i];
+ header[i].edgeflag = 0;
+ header[i].pad = 0;
+ }
+ }
+ else {
+ for (i = 0; i < VB->Count; i++) {
+ header[i].clipmask = 0;
+ header[i].edgeflag = 0;
+ header[i].pad = 0;
+ }
+ }
+ }
+
+ VB->AttribPtr[VF_ATTRIB_VERTEX_HEADER] = &draw->header;
+}
+
+
+
+
+
+static GLuint draw_prim_info(GLenum mode, GLuint *first, GLuint *incr)
+{
+ switch (mode) {
+ case GL_POINTS:
+ *first = 1;
+ *incr = 1;
+ return 0;
+ case GL_LINES:
+ *first = 2;
+ *incr = 2;
+ return 0;
+ case GL_LINE_STRIP:
+ *first = 2;
+ *incr = 1;
+ return 0;
+ case GL_LINE_LOOP:
+ *first = 2;
+ *incr = 1;
+ return 1;
+ case GL_TRIANGLES:
+ *first = 3;
+ *incr = 3;
+ return 0;
+ case GL_TRIANGLE_STRIP:
+ *first = 3;
+ *incr = 1;
+ return 0;
+ case GL_TRIANGLE_FAN:
+ case GL_POLYGON:
+ *first = 3;
+ *incr = 1;
+ return 1;
+ case GL_QUADS:
+ *first = 4;
+ *incr = 4;
+ return 0;
+ case GL_QUAD_STRIP:
+ *first = 4;
+ *incr = 2;
+ return 0;
+ default:
+ assert(0);
+ *first = 1;
+ *incr = 1;
+ return 0;
+ }
+}
+
+
+static GLuint trim( GLuint count, GLuint first, GLuint incr )
+{
+ if (count < first)
+ return 0;
+ else
+ return count - (count - first) % incr;
+}
+
+
+/* This is a hack & will all go away.
+ */
+void draw_vb(struct draw_context *draw,
+ struct vertex_buffer *VB )
+{
+ GLuint i;
+
+ VB->AttribPtr[VF_ATTRIB_POS] = VB->NdcPtr;
+ VB->AttribPtr[VF_ATTRIB_BFC0] = VB->ColorPtr[1];
+ VB->AttribPtr[VF_ATTRIB_BFC1] = VB->SecondaryColorPtr[1];
+ VB->AttribPtr[VF_ATTRIB_CLIP_POS] = VB->ClipPtr;
+
+ /* Build vertex headers:
+ */
+ build_vertex_headers( draw, VB );
+
+ draw->in_vb = 1;
+
+ /* Allocate the vertices:
+ */
+ draw_allocate_vertices( draw, VB->Count );
+
+ /* Bind the vb outputs:
+ */
+ vf_set_sources( draw->vf, VB->AttribPtr, 0 );
+
+ /* Build the hardware or prim-pipe vertices:
+ */
+ vf_emit_vertices( draw->vf, VB->Count, draw->verts );
+
+
+ for (i = 0; i < VB->PrimitiveCount; i++) {
+
+ GLenum mode = VB->Primitive[i].mode;
+ GLuint start = VB->Primitive[i].start;
+ GLuint length, first, incr;
+
+ /* Trim the primitive down to a legal size.
+ */
+ draw_prim_info( mode, &first, &incr );
+ length = trim( VB->Primitive[i].count, first, incr );
+
+ if (!length)
+ continue;
+
+ if (draw->prim != mode)
+ draw_set_prim( draw, mode );
+
+ if (VB->Elts) {
+ draw_indexed_prim( draw,
+ VB->Elts + start,
+ length );
+ }
+ else {
+ draw_prim( draw,
+ start,
+ length );
+ }
+ }
+
+ draw_release_vertices( draw );
+ draw->verts = NULL;
+ draw->in_vb = 0;
+}
+
+void draw_set_viewport( struct draw_context *draw,
+ const GLfloat *scale,
+ const GLfloat *translate )
+{
+ assert(!draw->in_vb);
+ vf_set_vp_scale_translate( draw->vf, scale, translate );
+}
+
+
+
+struct draw_context *draw_create( struct softpipe_context *softpipe )
+{
+ struct draw_context *draw = CALLOC_STRUCT( draw_context );
+ draw->softpipe = softpipe;
+ draw->vf = vf_create( GL_TRUE );
+
+ return draw;
+}
+
+
+void draw_destroy( struct draw_context *draw )
+{
+ if (draw->header.storage)
+ ALIGN_FREE( draw->header.storage );
+
+ vf_destroy( draw->vf );
+
+ FREE( draw );
+}
+
+#define EMIT_ATTR( ATTR, STYLE ) \
+do { \
+ draw->attrs[draw->nr_attrs].attrib = ATTR; \
+ draw->attrs[draw->nr_attrs].format = STYLE; \
+ draw->nr_attrs++; \
+} while (0)
+
+
+void draw_set_vertex_attributes( struct draw_context *draw,
+ const GLuint *attrs,
+ GLuint nr_attrs )
+{
+ GLuint i;
+
+ draw->nr_attrs = 0;
+
+ EMIT_ATTR(VF_ATTRIB_VERTEX_HEADER, EMIT_1F);
+ EMIT_ATTR(VF_ATTRIB_CLIP_POS, EMIT_4F);
+
+ assert(attrs[0] == VF_ATTRIB_POS);
+ EMIT_ATTR(attrs[0], EMIT_4F_VIEWPORT);
+
+ for (i = 1; i < nr_attrs; i++)
+ EMIT_ATTR(attrs[i], EMIT_4F);
+
+ draw->vertex_size = vf_set_vertex_attributes( draw->vf, draw->attrs, draw->nr_attrs, 0 );
+}
+
+
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