glamor_rects.c revision 1b5d61b8 
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
27static const glamor_facet glamor_facet_polyfillrect_130 = {
28    .name = "poly_fill_rect",
29    .version = 130,
30    .vs_vars = "attribute vec4 primitive;\n",
31    .vs_exec = ("       vec2 pos = primitive.zw * vec2(gl_VertexID&1, (gl_VertexID&2)>>1);\n"
32                GLAMOR_POS(gl_Position, (primitive.xy + pos))),
33};
34
35static const glamor_facet glamor_facet_polyfillrect_120 = {
36    .name = "poly_fill_rect",
37    .vs_vars = "attribute vec2 primitive;\n",
38    .vs_exec = ("        vec2 pos = vec2(0,0);\n"
39                GLAMOR_POS(gl_Position, primitive.xy)),
40};
41
42static Bool
43glamor_poly_fill_rect_gl(DrawablePtr drawable,
44                         GCPtr gc, int nrect, xRectangle *prect)
45{
46    ScreenPtr screen = drawable->pScreen;
47    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
48    PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
49    glamor_pixmap_private *pixmap_priv;
50    glamor_program *prog;
51    int off_x, off_y;
52    GLshort *v;
53    char *vbo_offset;
54    int box_index;
55    Bool ret = FALSE;
56    BoxRec bounds = glamor_no_rendering_bounds();
57
58    pixmap_priv = glamor_get_pixmap_private(pixmap);
59    if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
60        goto bail;
61
62    glamor_make_current(glamor_priv);
63
64    if (nrect < 100) {
65        bounds = glamor_start_rendering_bounds();
66        for (int i = 0; i < nrect; i++)
67            glamor_bounds_union_rect(&bounds, &prect[i]);
68    }
69
70    if (glamor_priv->glsl_version >= 130) {
71        prog = glamor_use_program_fill(pixmap, gc,
72                                       &glamor_priv->poly_fill_rect_program,
73                                       &glamor_facet_polyfillrect_130);
74
75        if (!prog)
76            goto bail;
77
78        /* Set up the vertex buffers for the points */
79
80        v = glamor_get_vbo_space(drawable->pScreen, nrect * sizeof (xRectangle), &vbo_offset);
81
82        glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
83        glVertexAttribDivisor(GLAMOR_VERTEX_POS, 1);
84        glVertexAttribPointer(GLAMOR_VERTEX_POS, 4, GL_SHORT, GL_FALSE,
85                              4 * sizeof (short), vbo_offset);
86
87        memcpy(v, prect, nrect * sizeof (xRectangle));
88
89        glamor_put_vbo_space(screen);
90    } else {
91        int n;
92
93        prog = glamor_use_program_fill(pixmap, gc,
94                                       &glamor_priv->poly_fill_rect_program,
95                                       &glamor_facet_polyfillrect_120);
96
97        if (!prog)
98            goto bail;
99
100        /* Set up the vertex buffers for the points */
101
102        v = glamor_get_vbo_space(drawable->pScreen, nrect * 8 * sizeof (short), &vbo_offset);
103
104        glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
105        glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
106                              2 * sizeof (short), vbo_offset);
107
108        for (n = 0; n < nrect; n++) {
109            v[0] = prect->x;                v[1] = prect->y;
110            v[2] = prect->x;                v[3] = prect->y + prect->height;
111            v[4] = prect->x + prect->width; v[5] = prect->y + prect->height;
112            v[6] = prect->x + prect->width; v[7] = prect->y;
113            prect++;
114            v += 8;
115        }
116
117        glamor_put_vbo_space(screen);
118    }
119
120    glEnable(GL_SCISSOR_TEST);
121
122    glamor_pixmap_loop(pixmap_priv, box_index) {
123        int nbox = RegionNumRects(gc->pCompositeClip);
124        BoxPtr box = RegionRects(gc->pCompositeClip);
125
126        if (!glamor_set_destination_drawable(drawable, box_index, TRUE, FALSE,
127                                             prog->matrix_uniform, &off_x, &off_y))
128            goto bail;
129
130        while (nbox--) {
131            BoxRec scissor = {
132                .x1 = max(box->x1, bounds.x1 + drawable->x),
133                .y1 = max(box->y1, bounds.y1 + drawable->y),
134                .x2 = min(box->x2, bounds.x2 + drawable->x),
135                .y2 = min(box->y2, bounds.y2 + drawable->y),
136            };
137
138            box++;
139
140            if (scissor.x1 >= scissor.x2 || scissor.y1 >= scissor.y2)
141                continue;
142
143            glScissor(scissor.x1 + off_x,
144                      scissor.y1 + off_y,
145                      scissor.x2 - scissor.x1,
146                      scissor.y2 - scissor.y1);
147            if (glamor_priv->glsl_version >= 130)
148                glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, nrect);
149            else {
150                glamor_glDrawArrays_GL_QUADS(glamor_priv, nrect);
151            }
152        }
153    }
154
155    ret = TRUE;
156
157bail:
158    glDisable(GL_SCISSOR_TEST);
159    if (glamor_priv->glsl_version >= 130)
160        glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
161    glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
162
163    return ret;
164}
165
166static void
167glamor_poly_fill_rect_bail(DrawablePtr drawable,
168                           GCPtr gc, int nrect, xRectangle *prect)
169{
170    glamor_fallback("to %p (%c)\n", drawable,
171                    glamor_get_drawable_location(drawable));
172    if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) &&
173        glamor_prepare_access_gc(gc)) {
174        fbPolyFillRect(drawable, gc, nrect, prect);
175    }
176    glamor_finish_access_gc(gc);
177    glamor_finish_access(drawable);
178}
179
180void
181glamor_poly_fill_rect(DrawablePtr drawable,
182                      GCPtr gc, int nrect, xRectangle *prect)
183{
184    if (glamor_poly_fill_rect_gl(drawable, gc, nrect, prect))
185        return;
186    glamor_poly_fill_rect_bail(drawable, gc, nrect, prect);
187}
188