1 /*
2 * Copyright © 2014 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23 #include "glamor_priv.h"
24 #include "glamor_program.h"
25 #include "glamor_transform.h"
26 #include "glamor_prepare.h"
27
28 static const glamor_facet glamor_facet_poly_segment = {
29 .name = "poly_segment",
30 .vs_vars = "attribute vec2 primitive;\n",
31 .vs_exec = (" vec2 pos = vec2(0.0,0.0);\n"
32 GLAMOR_POS(gl_Position, primitive.xy)),
33 };
34
35 static Bool
glamor_poly_segment_solid_gl(DrawablePtr drawable,GCPtr gc,int nseg,xSegment * segs)36 glamor_poly_segment_solid_gl(DrawablePtr drawable, GCPtr gc,
37 int nseg, xSegment *segs)
38 {
39 ScreenPtr screen = drawable->pScreen;
40 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
41 PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
42 glamor_pixmap_private *pixmap_priv;
43 glamor_program *prog;
44 int off_x, off_y;
45 xSegment *v;
46 char *vbo_offset;
47 int box_index;
48 int add_last;
49 Bool ret = FALSE;
50
51 pixmap_priv = glamor_get_pixmap_private(pixmap);
52 if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
53 goto bail;
54
55 add_last = 0;
56 if (gc->capStyle != CapNotLast)
57 add_last = 1;
58
59 glamor_make_current(glamor_priv);
60
61 prog = glamor_use_program_fill(pixmap, gc,
62 &glamor_priv->poly_segment_program,
63 &glamor_facet_poly_segment);
64
65 if (!prog)
66 goto bail;
67
68 /* Set up the vertex buffers for the points */
69
70 v = glamor_get_vbo_space(drawable->pScreen,
71 (nseg << add_last) * sizeof (xSegment),
72 &vbo_offset);
73
74 glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
75 glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
76 sizeof(DDXPointRec), vbo_offset);
77
78 if (add_last) {
79 int i, j;
80 for (i = 0, j=0; i < nseg; i++) {
81 v[j++] = segs[i];
82 v[j].x1 = segs[i].x2;
83 v[j].y1 = segs[i].y2;
84 v[j].x2 = segs[i].x2+1;
85 v[j].y2 = segs[i].y2;
86 j++;
87 }
88 } else
89 memcpy(v, segs, nseg * sizeof (xSegment));
90
91 glamor_put_vbo_space(screen);
92
93 glEnable(GL_SCISSOR_TEST);
94
95 glamor_pixmap_loop(pixmap_priv, box_index) {
96 int nbox = RegionNumRects(gc->pCompositeClip);
97 BoxPtr box = RegionRects(gc->pCompositeClip);
98
99 if (!glamor_set_destination_drawable(drawable, box_index, TRUE, TRUE,
100 prog->matrix_uniform, &off_x, &off_y))
101 goto bail;
102
103 while (nbox--) {
104 glScissor(box->x1 + off_x,
105 box->y1 + off_y,
106 box->x2 - box->x1,
107 box->y2 - box->y1);
108 box++;
109 glDrawArrays(GL_LINES, 0, nseg << (1 + add_last));
110 }
111 }
112
113 ret = TRUE;
114
115 glDisable(GL_SCISSOR_TEST);
116 glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
117
118 bail:
119 return ret;
120 }
121
122 static Bool
glamor_poly_segment_gl(DrawablePtr drawable,GCPtr gc,int nseg,xSegment * segs)123 glamor_poly_segment_gl(DrawablePtr drawable, GCPtr gc,
124 int nseg, xSegment *segs)
125 {
126 if (gc->lineWidth != 0)
127 return FALSE;
128
129 switch (gc->lineStyle) {
130 case LineSolid:
131 return glamor_poly_segment_solid_gl(drawable, gc, nseg, segs);
132 case LineOnOffDash:
133 return glamor_poly_segment_dash_gl(drawable, gc, nseg, segs);
134 case LineDoubleDash:
135 if (gc->fillStyle == FillTiled)
136 return glamor_poly_segment_solid_gl(drawable, gc, nseg, segs);
137 else
138 return glamor_poly_segment_dash_gl(drawable, gc, nseg, segs);
139 default:
140 return FALSE;
141 }
142 }
143
144 static void
glamor_poly_segment_bail(DrawablePtr drawable,GCPtr gc,int nseg,xSegment * segs)145 glamor_poly_segment_bail(DrawablePtr drawable, GCPtr gc,
146 int nseg, xSegment *segs)
147 {
148 glamor_fallback("to %p (%c)\n", drawable,
149 glamor_get_drawable_location(drawable));
150
151 if (gc->lineWidth == 0) {
152 if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) &&
153 glamor_prepare_access_gc(gc)) {
154 fbPolySegment(drawable, gc, nseg, segs);
155 }
156 glamor_finish_access_gc(gc);
157 glamor_finish_access(drawable);
158 } else
159 miPolySegment(drawable, gc, nseg, segs);
160 }
161
162 void
glamor_poly_segment(DrawablePtr drawable,GCPtr gc,int nseg,xSegment * segs)163 glamor_poly_segment(DrawablePtr drawable, GCPtr gc,
164 int nseg, xSegment *segs)
165 {
166 if (glamor_poly_segment_gl(drawable, gc, nseg, segs))
167 return;
168
169 glamor_poly_segment_bail(drawable, gc, nseg, segs);
170 }
171