ui/qemu-pixman.c

   1 /*
   2  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   3  * See the COPYING file in the top-level directory.
   4  */
   5
   6 #include "qemu/osdep.h"
   7 #include "qemu-common.h"
   8 #include "ui/console.h"
   9
  10 PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format)
  11 {
  12     PixelFormat pf;
  13     uint8_t bpp;
  14
  15     bpp = pf.bits_per_pixel = PIXMAN_FORMAT_BPP(format);
  16     pf.bytes_per_pixel = PIXMAN_FORMAT_BPP(format) / 8;
  17     pf.depth = PIXMAN_FORMAT_DEPTH(format);
  18
  19     pf.abits = PIXMAN_FORMAT_A(format);
  20     pf.rbits = PIXMAN_FORMAT_R(format);
  21     pf.gbits = PIXMAN_FORMAT_G(format);
  22     pf.bbits = PIXMAN_FORMAT_B(format);
  23
  24     switch (PIXMAN_FORMAT_TYPE(format)) {
  25     case PIXMAN_TYPE_ARGB:
  26         pf.ashift = pf.bbits + pf.gbits + pf.rbits;
  27         pf.rshift = pf.bbits + pf.gbits;
  28         pf.gshift = pf.bbits;
  29         pf.bshift = 0;
  30         break;
  31     case PIXMAN_TYPE_ABGR:
  32         pf.ashift = pf.rbits + pf.gbits + pf.bbits;
  33         pf.bshift = pf.rbits + pf.gbits;
  34         pf.gshift = pf.rbits;
  35         pf.rshift = 0;
  36         break;
  37     case PIXMAN_TYPE_BGRA:
  38         pf.bshift = bpp - pf.bbits;
  39         pf.gshift = bpp - (pf.bbits + pf.gbits);
  40         pf.rshift = bpp - (pf.bbits + pf.gbits + pf.rbits);
  41         pf.ashift = 0;
  42         break;
  43     case PIXMAN_TYPE_RGBA:
  44         pf.rshift = bpp - pf.rbits;
  45         pf.gshift = bpp - (pf.rbits + pf.gbits);
  46         pf.bshift = bpp - (pf.rbits + pf.gbits + pf.bbits);
  47         pf.ashift = 0;
  48         break;
  49     default:
  50         g_assert_not_reached();
  51         break;
  52     }
  53
  54     pf.amax = (1 << pf.abits) - 1;
  55     pf.rmax = (1 << pf.rbits) - 1;
  56     pf.gmax = (1 << pf.gbits) - 1;
  57     pf.bmax = (1 << pf.bbits) - 1;
  58     pf.amask = pf.amax << pf.ashift;
  59     pf.rmask = pf.rmax << pf.rshift;
  60     pf.gmask = pf.gmax << pf.gshift;
  61     pf.bmask = pf.bmax << pf.bshift;
  62
  63     return pf;
  64 }
  65
  66 pixman_format_code_t qemu_default_pixman_format(int bpp, bool native_endian)
  67 {
  68     if (native_endian) {
  69         switch (bpp) {
  70         case 15:
  71             return PIXMAN_x1r5g5b5;
  72         case 16:
  73             return PIXMAN_r5g6b5;
  74         case 24:
  75             return PIXMAN_r8g8b8;
  76         case 32:
  77             return PIXMAN_x8r8g8b8;
  78         }
  79     } else {
  80         switch (bpp) {
  81         case 24:
  82             return PIXMAN_b8g8r8;
  83         case 32:
  84             return PIXMAN_b8g8r8x8;
  85         break;
  86         }
  87     }
  88     return 0;
  89 }
  90
  91 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
  92 {
  93     int type = PIXMAN_TYPE_OTHER;
  94
  95     if (rshift > gshift && gshift > bshift) {
  96         if (bshift == 0) {
  97             type = PIXMAN_TYPE_ARGB;
  98         } else {
  99 #if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 21, 8)
 100             type = PIXMAN_TYPE_RGBA;
 101 #endif
 102         }
 103     } else if (rshift < gshift && gshift < bshift) {
 104         if (rshift == 0) {
 105             type = PIXMAN_TYPE_ABGR;
 106         } else {
 107 #if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 16, 0)
 108             type = PIXMAN_TYPE_BGRA;
 109 #endif
 110         }
 111     }
 112     return type;
 113 }
 114
 115 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
 116 {
 117     pixman_format_code_t format;
 118     int type;
 119
 120     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
 121     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
 122                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
 123     if (!pixman_format_supported_source(format)) {
 124         return 0;
 125     }
 126     return format;
 127 }
 128
 129 /*
 130  * Return true for known-good pixman conversions.
 131  *
 132  * UIs using pixman for format conversion can hook this into
 133  * DisplayChangeListenerOps->dpy_gfx_check_format
 134  */
 135 bool qemu_pixman_check_format(DisplayChangeListener *dcl,
 136                               pixman_format_code_t format)
 137 {
 138     switch (format) {
 139     /* 32 bpp */
 140     case PIXMAN_x8r8g8b8:
 141     case PIXMAN_a8r8g8b8:
 142     case PIXMAN_b8g8r8x8:
 143     case PIXMAN_b8g8r8a8:
 144     /* 24 bpp */
 145     case PIXMAN_r8g8b8:
 146     case PIXMAN_b8g8r8:
 147     /* 16 bpp */
 148     case PIXMAN_x1r5g5b5:
 149     case PIXMAN_r5g6b5:
 150         return true;
 151     default:
 152         return false;
 153     }
 154 }
 155
 156 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
 157                                            int width)
 158 {
 159     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
 160     assert(image != NULL);
 161     return image;
 162 }
 163
 164 /* fill linebuf from framebuffer */
 165 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
 166                               int width, int x, int y)
 167 {
 168     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
 169                            x, y, 0, 0, 0, 0, width, 1);
 170 }
 171
 172 /* copy linebuf to framebuffer */
 173 void qemu_pixman_linebuf_copy(pixman_image_t *fb, int width, int x, int y,
 174                               pixman_image_t *linebuf)
 175 {
 176     pixman_image_composite(PIXMAN_OP_SRC, linebuf, NULL, fb,
 177                            0, 0, 0, 0, x, y, width, 1);
 178 }
 179
 180 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
 181                                           pixman_image_t *image)
 182 {
 183     return pixman_image_create_bits(format,
 184                                     pixman_image_get_width(image),
 185                                     pixman_image_get_height(image),
 186                                     NULL,
 187                                     pixman_image_get_stride(image));
 188 }
 189
 190 void qemu_pixman_image_unref(pixman_image_t *image)
 191 {
 192     if (image == NULL) {
 193         return;
 194     }
 195     pixman_image_unref(image);
 196 }
 197
 198 pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color)
 199 {
 200     pixman_color_t c;
 201
 202     c.red   = ((color & pf->rmask) >> pf->rshift) << (16 - pf->rbits);
 203     c.green = ((color & pf->gmask) >> pf->gshift) << (16 - pf->gbits);
 204     c.blue  = ((color & pf->bmask) >> pf->bshift) << (16 - pf->bbits);
 205     c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);
 206     return c;
 207 }
 208
 209 pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,
 210                                                unsigned int ch)
 211 {
 212     pixman_image_t *glyph;
 213     uint8_t *data;
 214     bool bit;
 215     int x, y;
 216
 217     glyph = pixman_image_create_bits(PIXMAN_a8, 8, height,
 218                                      NULL, 0);
 219     data = (uint8_t *)pixman_image_get_data(glyph);
 220
 221     font += height * ch;
 222     for (y = 0; y < height; y++, font++) {
 223         for (x = 0; x < 8; x++, data++) {
 224             bit = (*font) & (1 << (7-x));
 225             *data = bit ? 0xff : 0x00;
 226         }
 227     }
 228     return glyph;
 229 }
 230
 231 void qemu_pixman_glyph_render(pixman_image_t *glyph,
 232                               pixman_image_t *surface,
 233                               pixman_color_t *fgcol,
 234                               pixman_color_t *bgcol,
 235                               int x, int y, int cw, int ch)
 236 {
 237     pixman_image_t *ifg = pixman_image_create_solid_fill(fgcol);
 238     pixman_image_t *ibg = pixman_image_create_solid_fill(bgcol);
 239
 240     pixman_image_composite(PIXMAN_OP_SRC, ibg, NULL, surface,
 241                            0, 0, 0, 0,
 242                            cw * x, ch * y,
 243                            cw, ch);
 244     pixman_image_composite(PIXMAN_OP_OVER, ifg, glyph, surface,
 245                            0, 0, 0, 0,
 246                            cw * x, ch * y,
 247                            cw, ch);
 248     pixman_image_unref(ifg);
 249     pixman_image_unref(ibg);
 250 }