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@gmail.com>
26 *
27 */
28
29 #include "glamor_priv.h"
30 #include <dixfontstr.h>
31 #include "glamor_transform.h"
32
33 static const glamor_facet glamor_facet_poly_glyph_blt = {
34 .name = "poly_glyph_blt",
35 .vs_vars = "attribute vec2 primitive;\n",
36 .vs_exec = (" vec2 pos = vec2(0,0);\n"
37 GLAMOR_POS(gl_Position, primitive)),
38 };
39
40 static Bool
glamor_poly_glyph_blt_gl(DrawablePtr drawable,GCPtr gc,int start_x,int y,unsigned int nglyph,CharInfoPtr * ppci,void * pglyph_base)41 glamor_poly_glyph_blt_gl(DrawablePtr drawable, GCPtr gc,
42 int start_x, int y, unsigned int nglyph,
43 CharInfoPtr *ppci, void *pglyph_base)
44 {
45 ScreenPtr screen = drawable->pScreen;
46 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
47 PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
48 glamor_pixmap_private *pixmap_priv;
49 glamor_program *prog;
50 RegionPtr clip = gc->pCompositeClip;
51 int box_index;
52 Bool ret = FALSE;
53
54 pixmap_priv = glamor_get_pixmap_private(pixmap);
55 if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
56 goto bail;
57
58 glamor_make_current(glamor_priv);
59
60 prog = glamor_use_program_fill(pixmap, gc,
61 &glamor_priv->poly_glyph_blt_progs,
62 &glamor_facet_poly_glyph_blt);
63 if (!prog)
64 goto bail;
65
66 glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
67
68 start_x += drawable->x;
69 y += drawable->y;
70
71 glamor_pixmap_loop(pixmap_priv, box_index) {
72 int x;
73 int n;
74 int num_points, max_points;
75 INT16 *points = NULL;
76 int off_x, off_y;
77 char *vbo_offset;
78
79 if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
80 prog->matrix_uniform, &off_x, &off_y))
81 goto bail;
82
83 max_points = 500;
84 num_points = 0;
85 x = start_x;
86 for (n = 0; n < nglyph; n++) {
87 CharInfoPtr charinfo = ppci[n];
88 int w = GLYPHWIDTHPIXELS(charinfo);
89 int h = GLYPHHEIGHTPIXELS(charinfo);
90 uint8_t *glyphbits = FONTGLYPHBITS(NULL, charinfo);
91
92 if (w && h) {
93 int glyph_x = x + charinfo->metrics.leftSideBearing;
94 int glyph_y = y - charinfo->metrics.ascent;
95 int glyph_stride = GLYPHWIDTHBYTESPADDED(charinfo);
96 int xx, yy;
97
98 for (yy = 0; yy < h; yy++) {
99 uint8_t *glyph = glyphbits;
100 for (xx = 0; xx < w; glyph += ((xx&7) == 7), xx++) {
101 int pt_x_i = glyph_x + xx;
102 int pt_y_i = glyph_y + yy;
103
104 if (!(*glyph & (1 << (xx & 7))))
105 continue;
106
107 if (!RegionContainsPoint(clip, pt_x_i, pt_y_i, NULL))
108 continue;
109
110 if (!num_points) {
111 points = glamor_get_vbo_space(screen,
112 max_points *
113 (2 * sizeof (INT16)),
114 &vbo_offset);
115
116 glVertexAttribPointer(GLAMOR_VERTEX_POS,
117 2, GL_SHORT,
118 GL_FALSE, 0, vbo_offset);
119 }
120
121 *points++ = pt_x_i;
122 *points++ = pt_y_i;
123 num_points++;
124
125 if (num_points == max_points) {
126 glamor_put_vbo_space(screen);
127 glDrawArrays(GL_POINTS, 0, num_points);
128 num_points = 0;
129 }
130 }
131 glyphbits += glyph_stride;
132 }
133 }
134 x += charinfo->metrics.characterWidth;
135 }
136
137 if (num_points) {
138 glamor_put_vbo_space(screen);
139 glDrawArrays(GL_POINTS, 0, num_points);
140 }
141 }
142
143 glamor_pixmap_invalid(pixmap);
144
145 ret = TRUE;
146
147 bail:
148 glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
149
150 return ret;
151 }
152
153 void
glamor_poly_glyph_blt(DrawablePtr drawable,GCPtr gc,int start_x,int y,unsigned int nglyph,CharInfoPtr * ppci,void * pglyph_base)154 glamor_poly_glyph_blt(DrawablePtr drawable, GCPtr gc,
155 int start_x, int y, unsigned int nglyph,
156 CharInfoPtr *ppci, void *pglyph_base)
157 {
158 if (GLAMOR_PREFER_GL() &&
159 glamor_poly_glyph_blt_gl(drawable, gc, start_x, y, nglyph, ppci,
160 pglyph_base))
161 return;
162 miPolyGlyphBlt(drawable, gc, start_x, y, nglyph,
163 ppci, pglyph_base);
164 }
165
166 static Bool
glamor_push_pixels_gl(GCPtr gc,PixmapPtr bitmap,DrawablePtr drawable,int w,int h,int x,int y)167 glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap,
168 DrawablePtr drawable, int w, int h, int x, int y)
169 {
170 ScreenPtr screen = drawable->pScreen;
171 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
172 PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
173 glamor_pixmap_private *pixmap_priv;
174 uint8_t *bitmap_data = bitmap->devPrivate.ptr;
175 int bitmap_stride = bitmap->devKind;
176 glamor_program *prog;
177 RegionPtr clip = gc->pCompositeClip;
178 int box_index;
179 int yy, xx;
180 int num_points;
181 INT16 *points = NULL;
182 char *vbo_offset;
183 Bool ret = FALSE;
184
185 if (w * h > MAXINT / (2 * sizeof(float)))
186 goto bail;
187
188 pixmap_priv = glamor_get_pixmap_private(pixmap);
189 if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
190 goto bail;
191
192 glamor_make_current(glamor_priv);
193
194 prog = glamor_use_program_fill(pixmap, gc,
195 &glamor_priv->poly_glyph_blt_progs,
196 &glamor_facet_poly_glyph_blt);
197 if (!prog)
198 goto bail;
199
200 glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
201
202 points = glamor_get_vbo_space(screen, w * h * sizeof(INT16) * 2,
203 &vbo_offset);
204 num_points = 0;
205
206 /* Note that because fb sets miTranslate in the GC, our incoming X
207 * and Y are in screen coordinate space (same for spans, but not
208 * other operations).
209 */
210
211 for (yy = 0; yy < h; yy++) {
212 uint8_t *bitmap_row = bitmap_data + yy * bitmap_stride;
213 for (xx = 0; xx < w; xx++) {
214 if (bitmap_row[xx / 8] & (1 << xx % 8) &&
215 RegionContainsPoint(clip,
216 x + xx,
217 y + yy,
218 NULL)) {
219 *points++ = x + xx;
220 *points++ = y + yy;
221 num_points++;
222 }
223 }
224 }
225 glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT,
226 GL_FALSE, 0, vbo_offset);
227
228 glamor_put_vbo_space(screen);
229
230 glamor_pixmap_loop(pixmap_priv, box_index) {
231 if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
232 prog->matrix_uniform, NULL, NULL))
233 goto bail;
234
235 glDrawArrays(GL_POINTS, 0, num_points);
236 }
237
238 glamor_pixmap_invalid(pixmap);
239
240 ret = TRUE;
241
242 bail:
243 glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
244
245 return ret;
246 }
247
248 void
glamor_push_pixels(GCPtr pGC,PixmapPtr pBitmap,DrawablePtr pDrawable,int w,int h,int x,int y)249 glamor_push_pixels(GCPtr pGC, PixmapPtr pBitmap,
250 DrawablePtr pDrawable, int w, int h, int x, int y)
251 {
252 if (GLAMOR_PREFER_GL() &&
253 glamor_push_pixels_gl(pGC, pBitmap, pDrawable, w, h, x, y))
254 return;
255
256 miPushPixels(pGC, pBitmap, pDrawable, w, h, x, y);
257 }
258