glamor_points.c revision 1b5d61b8 
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
32static 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
38static Bool
39glamor_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
110bail:
111    glDisable(GL_SCISSOR_TEST);
112    glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
113
114    return ret;
115}
116
117void
118glamor_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