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 "ui/console.h"
   8 #include "standard-headers/drm/drm_fourcc.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 /* Note: drm is little endian, pixman is native endian */
  92 pixman_format_code_t qemu_drm_format_to_pixman(uint32_t drm_format)
  93 {
  94     static const struct {
  95         uint32_t drm_format;
  96         pixman_format_code_t pixman;
  97     } map[] = {
  98         { DRM_FORMAT_RGB888,   PIXMAN_LE_r8g8b8   },
  99         { DRM_FORMAT_ARGB8888, PIXMAN_LE_a8r8g8b8 },
 100         { DRM_FORMAT_XRGB8888, PIXMAN_LE_x8r8g8b8 }
 101     };
 102     int i;
 103
 104     for (i = 0; i < ARRAY_SIZE(map); i++) {
 105         if (drm_format == map[i].drm_format) {
 106             return map[i].pixman;
 107         }
 108     }
 109     return 0;
 110 }
 111
 112 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
 113 {
 114     int type = PIXMAN_TYPE_OTHER;
 115
 116     if (rshift > gshift && gshift > bshift) {
 117         if (bshift == 0) {
 118             type = PIXMAN_TYPE_ARGB;
 119         } else {
 120             type = PIXMAN_TYPE_RGBA;
 121         }
 122     } else if (rshift < gshift && gshift < bshift) {
 123         if (rshift == 0) {
 124             type = PIXMAN_TYPE_ABGR;
 125         } else {
 126             type = PIXMAN_TYPE_BGRA;
 127         }
 128     }
 129     return type;
 130 }
 131
 132 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
 133 {
 134     pixman_format_code_t format;
 135     int type;
 136
 137     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
 138     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
 139                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
 140     if (!pixman_format_supported_source(format)) {
 141         return 0;
 142     }
 143     return format;
 144 }
 145
 146 /*
 147  * Return true for known-good pixman conversions.
 148  *
 149  * UIs using pixman for format conversion can hook this into
 150  * DisplayChangeListenerOps->dpy_gfx_check_format
 151  */
 152 bool qemu_pixman_check_format(DisplayChangeListener *dcl,
 153                               pixman_format_code_t format)
 154 {
 155     switch (format) {
 156     /* 32 bpp */
 157     case PIXMAN_x8r8g8b8:
 158     case PIXMAN_a8r8g8b8:
 159     case PIXMAN_b8g8r8x8:
 160     case PIXMAN_b8g8r8a8:
 161     /* 24 bpp */
 162     case PIXMAN_r8g8b8:
 163     case PIXMAN_b8g8r8:
 164     /* 16 bpp */
 165     case PIXMAN_x1r5g5b5:
 166     case PIXMAN_r5g6b5:
 167         return true;
 168     default:
 169         return false;
 170     }
 171 }
 172
 173 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
 174                                            int width)
 175 {
 176     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
 177     assert(image != NULL);
 178     return image;
 179 }
 180
 181 /* fill linebuf from framebuffer */
 182 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
 183                               int width, int x, int y)
 184 {
 185     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
 186                            x, y, 0, 0, 0, 0, width, 1);
 187 }
 188
 189 /* copy linebuf to framebuffer */
 190 void qemu_pixman_linebuf_copy(pixman_image_t *fb, int width, int x, int y,
 191                               pixman_image_t *linebuf)
 192 {
 193     pixman_image_composite(PIXMAN_OP_SRC, linebuf, NULL, fb,
 194                            0, 0, 0, 0, x, y, width, 1);
 195 }
 196
 197 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
 198                                           pixman_image_t *image)
 199 {
 200     return pixman_image_create_bits(format,
 201                                     pixman_image_get_width(image),
 202                                     pixman_image_get_height(image),
 203                                     NULL,
 204                                     pixman_image_get_stride(image));
 205 }
 206
 207 void qemu_pixman_image_unref(pixman_image_t *image)
 208 {
 209     if (image == NULL) {
 210         return;
 211     }
 212     pixman_image_unref(image);
 213 }
 214
 215 pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color)
 216 {
 217     pixman_color_t c;
 218
 219     c.red   = ((color & pf->rmask) >> pf->rshift) << (16 - pf->rbits);
 220     c.green = ((color & pf->gmask) >> pf->gshift) << (16 - pf->gbits);
 221     c.blue  = ((color & pf->bmask) >> pf->bshift) << (16 - pf->bbits);
 222     c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);
 223     return c;
 224 }
 225
 226 pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,
 227                                                unsigned int ch)
 228 {
 229     pixman_image_t *glyph;
 230     uint8_t *data;
 231     bool bit;
 232     int x, y;
 233
 234     glyph = pixman_image_create_bits(PIXMAN_a8, 8, height,
 235                                      NULL, 0);
 236     data = (uint8_t *)pixman_image_get_data(glyph);
 237
 238     font += height * ch;
 239     for (y = 0; y < height; y++, font++) {
 240         for (x = 0; x < 8; x++, data++) {
 241             bit = (*font) & (1 << (7-x));
 242             *data = bit ? 0xff : 0x00;
 243         }
 244     }
 245     return glyph;
 246 }
 247
 248 void qemu_pixman_glyph_render(pixman_image_t *glyph,
 249                               pixman_image_t *surface,
 250                               pixman_color_t *fgcol,
 251                               pixman_color_t *bgcol,
 252                               int x, int y, int cw, int ch)
 253 {
 254     pixman_image_t *ifg = pixman_image_create_solid_fill(fgcol);
 255     pixman_image_t *ibg = pixman_image_create_solid_fill(bgcol);
 256
 257     pixman_image_composite(PIXMAN_OP_SRC, ibg, NULL, surface,
 258                            0, 0, 0, 0,
 259                            cw * x, ch * y,
 260                            cw, ch);
 261     pixman_image_composite(PIXMAN_OP_OVER, ifg, glyph, surface,
 262                            0, 0, 0, 0,
 263                            cw * x, ch * y,
 264                            cw, ch);
 265     pixman_image_unref(ifg);
 266     pixman_image_unref(ibg);
 267 }