1 /*
2 * Copyright © 2009 Intel Corporation
3 * Copyright © 1998 Keith Packard
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 *
24 * Authors:
25 * Zhigang Gong <zhigang.gong@linux.intel.com>
26 *
27 */
28
29 #include "glamor_priv.h"
30 #include "glamor_transform.h"
31
32 static const glamor_facet glamor_facet_point = {
33 .name = "poly_point",
34 .vs_vars = "attribute vec2 primitive;\n",
35 .vs_exec = GLAMOR_POS(gl_Position, primitive),
36 };
37
38 static Bool
glamor_poly_point_gl(DrawablePtr drawable,GCPtr gc,int mode,int npt,DDXPointPtr ppt)39 glamor_poly_point_gl(DrawablePtr drawable, GCPtr gc, int mode, int npt, DDXPointPtr ppt)
40 {
41 ScreenPtr screen = drawable->pScreen;
42 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
43 PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
44 glamor_program *prog = &glamor_priv->point_prog;
45 glamor_pixmap_private *pixmap_priv;
46 int off_x, off_y;
47 GLshort *vbo_ppt;
48 char *vbo_offset;
49 int box_index;
50 Bool ret = FALSE;
51
52 pixmap_priv = glamor_get_pixmap_private(pixmap);
53 if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
54 goto bail;
55
56 glamor_make_current(glamor_priv);
57
58 if (prog->failed)
59 goto bail;
60
61 if (!prog->prog) {
62 if (!glamor_build_program(screen, prog,
63 &glamor_facet_point,
64 &glamor_fill_solid,
65 NULL, NULL))
66 goto bail;
67 }
68
69 if (!glamor_use_program(pixmap, gc, prog, NULL))
70 goto bail;
71
72 vbo_ppt = glamor_get_vbo_space(screen, npt * (2 * sizeof (INT16)), &vbo_offset);
73 glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
74 glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE, 0, vbo_offset);
75 if (mode == CoordModePrevious) {
76 int n = npt;
77 INT16 x = 0, y = 0;
78 while (n--) {
79 vbo_ppt[0] = (x += ppt->x);
80 vbo_ppt[1] = (y += ppt->y);
81 vbo_ppt += 2;
82 ppt++;
83 }
84 } else
85 memcpy(vbo_ppt, ppt, npt * (2 * sizeof (INT16)));
86 glamor_put_vbo_space(screen);
87
88 glEnable(GL_SCISSOR_TEST);
89
90 glamor_pixmap_loop(pixmap_priv, box_index) {
91 int nbox = RegionNumRects(gc->pCompositeClip);
92 BoxPtr box = RegionRects(gc->pCompositeClip);
93
94 if (!glamor_set_destination_drawable(drawable, box_index, TRUE, TRUE,
95 prog->matrix_uniform, &off_x, &off_y))
96 goto bail;
97
98 while (nbox--) {
99 glScissor(box->x1 + off_x,
100 box->y1 + off_y,
101 box->x2 - box->x1,
102 box->y2 - box->y1);
103 box++;
104 glDrawArrays(GL_POINTS, 0, npt);
105 }
106 }
107
108 ret = TRUE;
109
110 bail:
111 glDisable(GL_SCISSOR_TEST);
112 glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
113
114 return ret;
115 }
116
117 void
glamor_poly_point(DrawablePtr drawable,GCPtr gc,int mode,int npt,DDXPointPtr ppt)118 glamor_poly_point(DrawablePtr drawable, GCPtr gc, int mode, int npt,
119 DDXPointPtr ppt)
120 {
121 if (glamor_poly_point_gl(drawable, gc, mode, npt, ppt))
122 return;
123 miPolyPoint(drawable, gc, mode, npt, ppt);
124 }
125