glamor_glyphblt.c (8518B)
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 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 ret = TRUE; 144 145 bail: 146 glDisableVertexAttribArray(GLAMOR_VERTEX_POS); 147 148 return ret; 149 } 150 151 void 152 glamor_poly_glyph_blt(DrawablePtr drawable, GCPtr gc, 153 int start_x, int y, unsigned int nglyph, 154 CharInfoPtr *ppci, void *pglyph_base) 155 { 156 if (glamor_poly_glyph_blt_gl(drawable, gc, start_x, y, nglyph, ppci, 157 pglyph_base)) 158 return; 159 miPolyGlyphBlt(drawable, gc, start_x, y, nglyph, 160 ppci, pglyph_base); 161 } 162 163 static Bool 164 glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap, 165 DrawablePtr drawable, int w, int h, int x, int y) 166 { 167 ScreenPtr screen = drawable->pScreen; 168 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); 169 PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable); 170 glamor_pixmap_private *pixmap_priv; 171 uint8_t *bitmap_data = bitmap->devPrivate.ptr; 172 int bitmap_stride = bitmap->devKind; 173 glamor_program *prog; 174 RegionPtr clip = gc->pCompositeClip; 175 int box_index; 176 int yy, xx; 177 int num_points; 178 INT16 *points = NULL; 179 char *vbo_offset; 180 Bool ret = FALSE; 181 182 if (w * h > MAXINT / (2 * sizeof(float))) 183 goto bail; 184 185 pixmap_priv = glamor_get_pixmap_private(pixmap); 186 if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv)) 187 goto bail; 188 189 glamor_make_current(glamor_priv); 190 191 prog = glamor_use_program_fill(pixmap, gc, 192 &glamor_priv->poly_glyph_blt_progs, 193 &glamor_facet_poly_glyph_blt); 194 if (!prog) 195 goto bail; 196 197 glEnableVertexAttribArray(GLAMOR_VERTEX_POS); 198 199 points = glamor_get_vbo_space(screen, w * h * sizeof(INT16) * 2, 200 &vbo_offset); 201 num_points = 0; 202 203 /* Note that because fb sets miTranslate in the GC, our incoming X 204 * and Y are in screen coordinate space (same for spans, but not 205 * other operations). 206 */ 207 208 for (yy = 0; yy < h; yy++) { 209 uint8_t *bitmap_row = bitmap_data + yy * bitmap_stride; 210 for (xx = 0; xx < w; xx++) { 211 if (bitmap_row[xx / 8] & (1 << xx % 8) && 212 RegionContainsPoint(clip, 213 x + xx, 214 y + yy, 215 NULL)) { 216 *points++ = x + xx; 217 *points++ = y + yy; 218 num_points++; 219 } 220 } 221 } 222 glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, 223 GL_FALSE, 0, vbo_offset); 224 225 glamor_put_vbo_space(screen); 226 227 glamor_pixmap_loop(pixmap_priv, box_index) { 228 if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE, 229 prog->matrix_uniform, NULL, NULL)) 230 goto bail; 231 232 glDrawArrays(GL_POINTS, 0, num_points); 233 } 234 235 ret = TRUE; 236 237 bail: 238 glDisableVertexAttribArray(GLAMOR_VERTEX_POS); 239 240 return ret; 241 } 242 243 void 244 glamor_push_pixels(GCPtr pGC, PixmapPtr pBitmap, 245 DrawablePtr pDrawable, int w, int h, int x, int y) 246 { 247 if (glamor_push_pixels_gl(pGC, pBitmap, pDrawable, w, h, x, y)) 248 return; 249 250 miPushPixels(pGC, pBitmap, pDrawable, w, h, x, y); 251 }