glamor/glamor_glyphblt.c

   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 = "in vec2 primitive;\n",
  36     .vs_exec = ("       vec2 pos = vec2(0,0);\n"
  37                 GLAMOR_DEFAULT_POINT_SIZE
  38                 GLAMOR_POS(gl_Position, primitive)),
  39 };
  40
  41 static Bool
  42 glamor_poly_glyph_blt_gl(DrawablePtr drawable, GCPtr gc,
  43                          int start_x, int y, unsigned int nglyph,
  44                          CharInfoPtr *ppci, void *pglyph_base)
  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     RegionPtr clip = gc->pCompositeClip;
  52     int box_index;
  53     Bool ret = FALSE;
  54
  55     pixmap_priv = glamor_get_pixmap_private(pixmap);
  56     if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
  57         goto bail;
  58
  59     glamor_make_current(glamor_priv);
  60
  61     prog = glamor_use_program_fill(drawable, gc,
  62                                    &glamor_priv->poly_glyph_blt_progs,
  63                                    &glamor_facet_poly_glyph_blt);
  64     if (!prog)
  65         goto bail;
  66
  67     glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
  68
  69     start_x += drawable->x;
  70     y += drawable->y;
  71
  72     glamor_pixmap_loop(pixmap_priv, box_index) {
  73         int x;
  74         int n;
  75         int num_points, max_points;
  76         INT16 *points = NULL;
  77         int off_x, off_y;
  78         char *vbo_offset;
  79
  80         if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
  81                                               prog->matrix_uniform, &off_x, &off_y))
  82             goto bail;
  83
  84         max_points = 500;
  85         num_points = 0;
  86         x = start_x;
  87         for (n = 0; n < nglyph; n++) {
  88             CharInfoPtr charinfo = ppci[n];
  89             int w = GLYPHWIDTHPIXELS(charinfo);
  90             int h = GLYPHHEIGHTPIXELS(charinfo);
  91             uint8_t *glyphbits = FONTGLYPHBITS(NULL, charinfo);
  92
  93             if (w && h) {
  94                 int glyph_x = x + charinfo->metrics.leftSideBearing;
  95                 int glyph_y = y - charinfo->metrics.ascent;
  96                 int glyph_stride = GLYPHWIDTHBYTESPADDED(charinfo);
  97                 int xx, yy;
  98
  99                 for (yy = 0; yy < h; yy++) {
 100                     uint8_t *glyph = glyphbits;
 101                     for (xx = 0; xx < w; glyph += ((xx&7) == 7), xx++) {
 102                         int pt_x_i = glyph_x + xx;
 103                         int pt_y_i = glyph_y + yy;
 104
 105 #if BITMAP_BIT_ORDER == MSBFirst
 106                         if (!(*glyph & (128 >> (xx & 7))))
 107 #else
 108                         if (!(*glyph & (1 << (xx & 7))))
 109 #endif
 110                             continue;
 111
 112                         if (!RegionContainsPoint(clip, pt_x_i, pt_y_i, NULL))
 113                             continue;
 114
 115                         if (!num_points) {
 116                             points = glamor_get_vbo_space(screen,
 117                                                           max_points *
 118                                                           (2 * sizeof (INT16)),
 119                                                           &vbo_offset);
 120
 121                             glVertexAttribPointer(GLAMOR_VERTEX_POS,
 122                                                   2, GL_SHORT,
 123                                                   GL_FALSE, 0, vbo_offset);
 124                         }
 125
 126                         *points++ = pt_x_i;
 127                         *points++ = pt_y_i;
 128                         num_points++;
 129
 130                         if (num_points == max_points) {
 131                             glamor_put_vbo_space(screen);
 132                             glDrawArrays(GL_POINTS, 0, num_points);
 133                             num_points = 0;
 134                         }
 135                     }
 136                     glyphbits += glyph_stride;
 137                 }
 138             }
 139             x += charinfo->metrics.characterWidth;
 140         }
 141
 142         if (num_points) {
 143             glamor_put_vbo_space(screen);
 144             glDrawArrays(GL_POINTS, 0, num_points);
 145         }
 146     }
 147
 148     ret = TRUE;
 149
 150 bail:
 151     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 152
 153     return ret;
 154 }
 155
 156 void
 157 glamor_poly_glyph_blt(DrawablePtr drawable, GCPtr gc,
 158                       int start_x, int y, unsigned int nglyph,
 159                       CharInfoPtr *ppci, void *pglyph_base)
 160 {
 161     if (glamor_poly_glyph_blt_gl(drawable, gc, start_x, y, nglyph, ppci,
 162                                  pglyph_base))
 163         return;
 164     miPolyGlyphBlt(drawable, gc, start_x, y, nglyph,
 165                    ppci, pglyph_base);
 166 }
 167
 168 static Bool
 169 glamor_push_pixels_gl(GCPtr gc, PixmapPtr bitmap,
 170                       DrawablePtr drawable, int w, int h, int x, int y)
 171 {
 172     ScreenPtr screen = drawable->pScreen;
 173     glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
 174     PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
 175     glamor_pixmap_private *pixmap_priv;
 176     uint8_t *bitmap_data = bitmap->devPrivate.ptr;
 177     int bitmap_stride = bitmap->devKind;
 178     glamor_program *prog;
 179     RegionPtr clip = gc->pCompositeClip;
 180     int box_index;
 181     int yy, xx;
 182     int num_points;
 183     INT16 *points = NULL;
 184     char *vbo_offset;
 185     Bool ret = FALSE;
 186
 187     if (w * h > MAXINT / (2 * sizeof(float)))
 188         goto bail;
 189
 190     pixmap_priv = glamor_get_pixmap_private(pixmap);
 191     if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
 192         goto bail;
 193
 194     glamor_make_current(glamor_priv);
 195
 196     prog = glamor_use_program_fill(drawable, gc,
 197                                    &glamor_priv->poly_glyph_blt_progs,
 198                                    &glamor_facet_poly_glyph_blt);
 199     if (!prog)
 200         goto bail;
 201
 202     glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
 203
 204     points = glamor_get_vbo_space(screen, w * h * sizeof(INT16) * 2,
 205                                   &vbo_offset);
 206     num_points = 0;
 207
 208     /* Note that because fb sets miTranslate in the GC, our incoming X
 209      * and Y are in screen coordinate space (same for spans, but not
 210      * other operations).
 211      */
 212
 213     for (yy = 0; yy < h; yy++) {
 214         uint8_t *bitmap_row = bitmap_data + yy * bitmap_stride;
 215         for (xx = 0; xx < w; xx++) {
 216 #if BITMAP_BIT_ORDER == MSBFirst
 217             if (bitmap_row[xx / 8] & (128 >> xx % 8) &&
 218 #else
 219             if (bitmap_row[xx / 8] & (1 << xx % 8) &&
 220 #endif
 221                 RegionContainsPoint(clip,
 222                                     x + xx,
 223                                     y + yy,
 224                                     NULL)) {
 225                 *points++ = x + xx;
 226                 *points++ = y + yy;
 227                 num_points++;
 228             }
 229         }
 230     }
 231     glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT,
 232                           GL_FALSE, 0, vbo_offset);
 233
 234     glamor_put_vbo_space(screen);
 235
 236     glamor_pixmap_loop(pixmap_priv, box_index) {
 237         if (!glamor_set_destination_drawable(drawable, box_index, FALSE, TRUE,
 238                                              prog->matrix_uniform, NULL, NULL))
 239             goto bail;
 240
 241         glDrawArrays(GL_POINTS, 0, num_points);
 242     }
 243
 244     ret = TRUE;
 245
 246 bail:
 247     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 248
 249     return ret;
 250 }
 251
 252 void
 253 glamor_push_pixels(GCPtr pGC, PixmapPtr pBitmap,
 254                    DrawablePtr pDrawable, int w, int h, int x, int y)
 255 {
 256     if (glamor_push_pixels_gl(pGC, pBitmap, pDrawable, w, h, x, y))
 257         return;
 258
 259     miPushPixels(pGC, pBitmap, pDrawable, w, h, x, y);
 260 }