summaryrefslogtreecommitdiffstats
path: root/src/mesa/pipe/draw/draw_stipple.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/pipe/draw/draw_stipple.c')
-rw-r--r--src/mesa/pipe/draw/draw_stipple.c239
1 files changed, 0 insertions, 239 deletions
diff --git a/src/mesa/pipe/draw/draw_stipple.c b/src/mesa/pipe/draw/draw_stipple.c
deleted file mode 100644
index 506f33512c8..00000000000
--- a/src/mesa/pipe/draw/draw_stipple.c
+++ /dev/null
@@ -1,239 +0,0 @@
-/**************************************************************************
- *
- * 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 <[email protected]>
- */
-
-/* Implement line stipple by cutting lines up into smaller lines.
- * There are hundreds of ways to implement line stipple, this is one
- * choice that should work in all situations, requires no state
- * manipulations, but with a penalty in terms of large amounts of
- * generated geometry.
- */
-
-
-#include "pipe/p_util.h"
-#include "pipe/p_defines.h"
-#include "pipe/p_shader_tokens.h"
-#include "draw_private.h"
-
-
-/** Subclass of draw_stage */
-struct stipple_stage {
- struct draw_stage stage;
- float counter;
- uint pattern;
- uint factor;
-};
-
-
-static INLINE struct stipple_stage *
-stipple_stage(struct draw_stage *stage)
-{
- return (struct stipple_stage *) stage;
-}
-
-
-/**
- * Compute interpolated vertex attributes for 'dst' at position 't'
- * between 'v0' and 'v1'.
- * XXX using linear interpolation for all attribs at this time.
- */
-static void
-screen_interp( struct draw_context *draw,
- struct vertex_header *dst,
- float t,
- const struct vertex_header *v0,
- const struct vertex_header *v1 )
-{
- uint attr;
- for (attr = 0; attr < draw->num_vs_outputs; attr++) {
- const float *val0 = v0->data[attr];
- const float *val1 = v1->data[attr];
- float *newv = dst->data[attr];
- uint i;
- for (i = 0; i < 4; i++) {
- newv[i] = val0[i] + t * (val1[i] - val0[i]);
- }
- }
-}
-
-
-static void
-emit_segment(struct draw_stage *stage, struct prim_header *header,
- float t0, float t1)
-{
- struct vertex_header *v0new = dup_vert(stage, header->v[0], 0);
- struct vertex_header *v1new = dup_vert(stage, header->v[1], 1);
- struct prim_header newprim = *header;
-
- if (t0 > 0.0) {
- screen_interp( stage->draw, v0new, t0, header->v[0], header->v[1] );
- newprim.v[0] = v0new;
- }
-
- if (t1 < 1.0) {
- screen_interp( stage->draw, v1new, t1, header->v[0], header->v[1] );
- newprim.v[1] = v1new;
- }
-
- stage->next->line( stage->next, &newprim );
-}
-
-
-static INLINE unsigned
-stipple_test(int counter, ushort pattern, int factor)
-{
- int b = (counter / factor) & 0xf;
- return (1 << b) & pattern;
-}
-
-
-static void
-stipple_line(struct draw_stage *stage, struct prim_header *header)
-{
- struct stipple_stage *stipple = stipple_stage(stage);
- struct vertex_header *v0 = header->v[0];
- struct vertex_header *v1 = header->v[1];
- const float *pos0 = v0->data[0];
- const float *pos1 = v1->data[0];
- float start = 0;
- int state = 0;
-
- float x0 = pos0[0];
- float x1 = pos1[0];
- float y0 = pos0[1];
- float y1 = pos1[1];
-
- float dx = x0 > x1 ? x0 - x1 : x1 - x0;
- float dy = y0 > y1 ? y0 - y1 : y1 - y0;
-
- float length = MAX2(dx, dy);
- int i;
-
- /* XXX ToDo: intead of iterating pixel-by-pixel, use a look-up table.
- */
- for (i = 0; i < length; i++) {
- int result = stipple_test( (int) stipple->counter+i,
- (ushort) stipple->pattern, stipple->factor );
- if (result != state) {
- /* changing from "off" to "on" or vice versa */
- if (state) {
- if (start != i) {
- /* finishing an "on" segment */
- emit_segment( stage, header, start / length, i / length );
- }
- }
- else {
- /* starting an "on" segment */
- start = (float) i;
- }
- state = result;
- }
- }
-
- if (state && start < length)
- emit_segment( stage, header, start / length, 1.0 );
-
- stipple->counter += length;
-}
-
-
-static void
-reset_stipple_counter(struct draw_stage *stage)
-{
- struct stipple_stage *stipple = stipple_stage(stage);
- stipple->counter = 0;
- stage->next->reset_stipple_counter( stage->next );
-}
-
-
-static void
-stipple_first_line(struct draw_stage *stage,
- struct prim_header *header)
-{
- struct stipple_stage *stipple = stipple_stage(stage);
- struct draw_context *draw = stage->draw;
-
- stipple->pattern = draw->rasterizer->line_stipple_pattern;
- stipple->factor = draw->rasterizer->line_stipple_factor + 1;
-
- stage->line = stipple_line;
- stage->line( stage, header );
-}
-
-
-static void
-stipple_flush(struct draw_stage *stage, unsigned flags)
-{
- stage->line = stipple_first_line;
- stage->next->flush( stage->next, flags );
-}
-
-
-static void
-passthrough_point(struct draw_stage *stage, struct prim_header *header)
-{
- stage->next->point( stage->next, header );
-}
-
-
-static void
-passthrough_tri(struct draw_stage *stage, struct prim_header *header)
-{
- stage->next->tri(stage->next, header);
-}
-
-
-static void
-stipple_destroy( struct draw_stage *stage )
-{
- draw_free_temp_verts( stage );
- FREE( stage );
-}
-
-
-/**
- * Create line stippler stage
- */
-struct draw_stage *draw_stipple_stage( struct draw_context *draw )
-{
- struct stipple_stage *stipple = CALLOC_STRUCT(stipple_stage);
-
- draw_alloc_temp_verts( &stipple->stage, 2 );
-
- stipple->stage.draw = draw;
- stipple->stage.next = NULL;
- stipple->stage.point = passthrough_point;
- stipple->stage.line = stipple_first_line;
- stipple->stage.tri = passthrough_tri;
- stipple->stage.reset_stipple_counter = reset_stipple_counter;
- stipple->stage.flush = stipple_flush;
- stipple->stage.destroy = stipple_destroy;
-
- return &stipple->stage;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 05:16:57 +0000