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-common.h"
   7 #include "ui/console.h"
   8
   9 PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format)
  10 {
  11     PixelFormat pf;
  12     uint8_t bpp;
  13
  14     bpp = pf.bits_per_pixel = PIXMAN_FORMAT_BPP(format);
  15     pf.bytes_per_pixel = PIXMAN_FORMAT_BPP(format) / 8;
  16     pf.depth = PIXMAN_FORMAT_DEPTH(format);
  17
  18     pf.abits = PIXMAN_FORMAT_A(format);
  19     pf.rbits = PIXMAN_FORMAT_R(format);
  20     pf.gbits = PIXMAN_FORMAT_G(format);
  21     pf.bbits = PIXMAN_FORMAT_B(format);
  22
  23     switch (PIXMAN_FORMAT_TYPE(format)) {
  24     case PIXMAN_TYPE_ARGB:
  25         pf.ashift = pf.bbits + pf.gbits + pf.rbits;
  26         pf.rshift = pf.bbits + pf.gbits;
  27         pf.gshift = pf.bbits;
  28         pf.bshift = 0;
  29         break;
  30     case PIXMAN_TYPE_ABGR:
  31         pf.ashift = pf.rbits + pf.gbits + pf.bbits;
  32         pf.bshift = pf.rbits + pf.gbits;
  33         pf.gshift = pf.rbits;
  34         pf.rshift = 0;
  35         break;
  36     case PIXMAN_TYPE_BGRA:
  37         pf.bshift = bpp - pf.bbits;
  38         pf.gshift = bpp - (pf.bbits + pf.gbits);
  39         pf.rshift = bpp - (pf.bbits + pf.gbits + pf.rbits);
  40         pf.ashift = 0;
  41         break;
  42     case PIXMAN_TYPE_RGBA:
  43         pf.rshift = bpp - pf.rbits;
  44         pf.gshift = bpp - (pf.rbits + pf.gbits);
  45         pf.bshift = bpp - (pf.rbits + pf.gbits + pf.bbits);
  46         pf.ashift = 0;
  47         break;
  48     default:
  49         g_assert_not_reached();
  50         break;
  51     }
  52
  53     pf.amax = (1 << pf.abits) - 1;
  54     pf.rmax = (1 << pf.rbits) - 1;
  55     pf.gmax = (1 << pf.gbits) - 1;
  56     pf.bmax = (1 << pf.bbits) - 1;
  57     pf.amask = pf.amax << pf.ashift;
  58     pf.rmask = pf.rmax << pf.rshift;
  59     pf.gmask = pf.gmax << pf.gshift;
  60     pf.bmask = pf.bmax << pf.bshift;
  61
  62     return pf;
  63 }
  64
  65 pixman_format_code_t qemu_default_pixman_format(int bpp, bool native_endian)
  66 {
  67     if (native_endian) {
  68         switch (bpp) {
  69         case 15:
  70             return PIXMAN_x1r5g5b5;
  71         case 16:
  72             return PIXMAN_r5g6b5;
  73         case 24:
  74             return PIXMAN_r8g8b8;
  75         case 32:
  76             return PIXMAN_x8r8g8b8;
  77         }
  78     } else {
  79         switch (bpp) {
  80         case 24:
  81             return PIXMAN_b8g8r8;
  82         case 32:
  83             return PIXMAN_b8g8r8x8;
  84         break;
  85         }
  86     }
  87     return 0;
  88 }
  89
  90 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
  91 {
  92     int type = PIXMAN_TYPE_OTHER;
  93
  94     if (rshift > gshift && gshift > bshift) {
  95         if (bshift == 0) {
  96             type = PIXMAN_TYPE_ARGB;
  97         } else {
  98 #if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 21, 8)
  99             type = PIXMAN_TYPE_RGBA;
 100 #endif
 101         }
 102     } else if (rshift < gshift && gshift < bshift) {
 103         if (rshift == 0) {
 104             type = PIXMAN_TYPE_ABGR;
 105         } else {
 106 #if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 16, 0)
 107             type = PIXMAN_TYPE_BGRA;
 108 #endif
 109         }
 110     }
 111     return type;
 112 }
 113
 114 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
 115 {
 116     pixman_format_code_t format;
 117     int type;
 118
 119     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
 120     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
 121                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
 122     if (!pixman_format_supported_source(format)) {
 123         return 0;
 124     }
 125     return format;
 126 }
 127
 128 /*
 129  * Return true for known-good pixman conversions.
 130  *
 131  * UIs using pixman for format conversion can hook this into
 132  * DisplayChangeListenerOps->dpy_gfx_check_format
 133  */
 134 bool qemu_pixman_check_format(DisplayChangeListener *dcl,
 135                               pixman_format_code_t format)
 136 {
 137     switch (format) {
 138     /* 32 bpp */
 139     case PIXMAN_x8r8g8b8:
 140     case PIXMAN_a8r8g8b8:
 141     case PIXMAN_b8g8r8x8:
 142     case PIXMAN_b8g8r8a8:
 143     /* 24 bpp */
 144     case PIXMAN_r8g8b8:
 145     case PIXMAN_b8g8r8:
 146     /* 16 bpp */
 147     case PIXMAN_x1r5g5b5:
 148     case PIXMAN_r5g6b5:
 149         return true;
 150     default:
 151         return false;
 152     }
 153 }
 154
 155 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
 156                                            int width)
 157 {
 158     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
 159     assert(image != NULL);
 160     return image;
 161 }
 162
 163 /* fill linebuf from framebuffer */
 164 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
 165                               int width, int x, int y)
 166 {
 167     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
 168                            x, y, 0, 0, 0, 0, width, 1);
 169 }
 170
 171 /* copy linebuf to framebuffer */
 172 void qemu_pixman_linebuf_copy(pixman_image_t *fb, int width, int x, int y,
 173                               pixman_image_t *linebuf)
 174 {
 175     pixman_image_composite(PIXMAN_OP_SRC, linebuf, NULL, fb,
 176                            0, 0, 0, 0, x, y, width, 1);
 177 }
 178
 179 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
 180                                           pixman_image_t *image)
 181 {
 182     pixman_image_t *mirror;
 183
 184     mirror = pixman_image_create_bits(format,
 185                                       pixman_image_get_width(image),
 186                                       pixman_image_get_height(image),
 187                                       NULL,
 188                                       pixman_image_get_stride(image));
 189     return mirror;
 190 }
 191
 192 void qemu_pixman_image_unref(pixman_image_t *image)
 193 {
 194     if (image == NULL) {
 195         return;
 196     }
 197     pixman_image_unref(image);
 198 }
 199
 200 pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color)
 201 {
 202     pixman_color_t c;
 203
 204     c.red   = ((color & pf->rmask) >> pf->rshift) << (16 - pf->rbits);
 205     c.green = ((color & pf->gmask) >> pf->gshift) << (16 - pf->gbits);
 206     c.blue  = ((color & pf->bmask) >> pf->bshift) << (16 - pf->bbits);
 207     c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);
 208     return c;
 209 }
 210
 211 pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,
 212                                                unsigned int ch)
 213 {
 214     pixman_image_t *glyph;
 215     uint8_t *data;
 216     bool bit;
 217     int x, y;
 218
 219     glyph = pixman_image_create_bits(PIXMAN_a8, 8, height,
 220                                      NULL, 0);
 221     data = (uint8_t *)pixman_image_get_data(glyph);
 222
 223     font += height * ch;
 224     for (y = 0; y < height; y++, font++) {
 225         for (x = 0; x < 8; x++, data++) {
 226             bit = (*font) & (1 << (7-x));
 227             *data = bit ? 0xff : 0x00;
 228         }
 229     }
 230     return glyph;
 231 }
 232
 233 void qemu_pixman_glyph_render(pixman_image_t *glyph,
 234                               pixman_image_t *surface,
 235                               pixman_color_t *fgcol,
 236                               pixman_color_t *bgcol,
 237                               int x, int y, int cw, int ch)
 238 {
 239     pixman_image_t *ifg = pixman_image_create_solid_fill(fgcol);
 240     pixman_image_t *ibg = pixman_image_create_solid_fill(bgcol);
 241
 242     pixman_image_composite(PIXMAN_OP_SRC, ibg, NULL, surface,
 243                            0, 0, 0, 0,
 244                            cw * x, ch * y,
 245                            cw, ch);
 246     pixman_image_composite(PIXMAN_OP_OVER, ifg, glyph, surface,
 247                            0, 0, 0, 0,
 248                            cw * x, ch * y,
 249                            cw, ch);
 250     pixman_image_unref(ifg);
 251     pixman_image_unref(ibg);
 252 }