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 static const struct {
  93     uint32_t drm_format;
  94     pixman_format_code_t pixman_format;
  95 } drm_format_pixman_map[] = {
  96     { DRM_FORMAT_RGB888,   PIXMAN_LE_r8g8b8   },
  97     { DRM_FORMAT_ARGB8888, PIXMAN_LE_a8r8g8b8 },
  98     { DRM_FORMAT_XRGB8888, PIXMAN_LE_x8r8g8b8 }
  99 };
 100
 101 pixman_format_code_t qemu_drm_format_to_pixman(uint32_t drm_format)
 102 {
 103     int i;
 104
 105     for (i = 0; i < ARRAY_SIZE(drm_format_pixman_map); i++) {
 106         if (drm_format == drm_format_pixman_map[i].drm_format) {
 107             return drm_format_pixman_map[i].pixman_format;
 108         }
 109     }
 110     return 0;
 111 }
 112
 113 uint32_t qemu_pixman_to_drm_format(pixman_format_code_t pixman_format)
 114 {
 115     int i;
 116
 117     for (i = 0; i < ARRAY_SIZE(drm_format_pixman_map); i++) {
 118         if (pixman_format == drm_format_pixman_map[i].pixman_format) {
 119             return drm_format_pixman_map[i].drm_format;
 120         }
 121     }
 122     return 0;
 123 }
 124
 125 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
 126 {
 127     int type = PIXMAN_TYPE_OTHER;
 128
 129     if (rshift > gshift && gshift > bshift) {
 130         if (bshift == 0) {
 131             type = PIXMAN_TYPE_ARGB;
 132         } else {
 133             type = PIXMAN_TYPE_RGBA;
 134         }
 135     } else if (rshift < gshift && gshift < bshift) {
 136         if (rshift == 0) {
 137             type = PIXMAN_TYPE_ABGR;
 138         } else {
 139             type = PIXMAN_TYPE_BGRA;
 140         }
 141     }
 142     return type;
 143 }
 144
 145 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
 146 {
 147     pixman_format_code_t format;
 148     int type;
 149
 150     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
 151     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
 152                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
 153     if (!pixman_format_supported_source(format)) {
 154         return 0;
 155     }
 156     return format;
 157 }
 158
 159 /*
 160  * Return true for known-good pixman conversions.
 161  *
 162  * UIs using pixman for format conversion can hook this into
 163  * DisplayChangeListenerOps->dpy_gfx_check_format
 164  */
 165 bool qemu_pixman_check_format(DisplayChangeListener *dcl,
 166                               pixman_format_code_t format)
 167 {
 168     switch (format) {
 169     /* 32 bpp */
 170     case PIXMAN_x8r8g8b8:
 171     case PIXMAN_a8r8g8b8:
 172     case PIXMAN_b8g8r8x8:
 173     case PIXMAN_b8g8r8a8:
 174     /* 24 bpp */
 175     case PIXMAN_r8g8b8:
 176     case PIXMAN_b8g8r8:
 177     /* 16 bpp */
 178     case PIXMAN_x1r5g5b5:
 179     case PIXMAN_r5g6b5:
 180         return true;
 181     default:
 182         return false;
 183     }
 184 }
 185
 186 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
 187                                            int width)
 188 {
 189     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
 190     assert(image != NULL);
 191     return image;
 192 }
 193
 194 /* fill linebuf from framebuffer */
 195 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
 196                               int width, int x, int y)
 197 {
 198     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
 199                            x, y, 0, 0, 0, 0, width, 1);
 200 }
 201
 202 /* copy linebuf to framebuffer */
 203 void qemu_pixman_linebuf_copy(pixman_image_t *fb, int width, int x, int y,
 204                               pixman_image_t *linebuf)
 205 {
 206     pixman_image_composite(PIXMAN_OP_SRC, linebuf, NULL, fb,
 207                            0, 0, 0, 0, x, y, width, 1);
 208 }
 209
 210 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
 211                                           pixman_image_t *image)
 212 {
 213     return pixman_image_create_bits(format,
 214                                     pixman_image_get_width(image),
 215                                     pixman_image_get_height(image),
 216                                     NULL,
 217                                     pixman_image_get_stride(image));
 218 }
 219
 220 void qemu_pixman_image_unref(pixman_image_t *image)
 221 {
 222     if (image == NULL) {
 223         return;
 224     }
 225     pixman_image_unref(image);
 226 }
 227
 228 pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color)
 229 {
 230     pixman_color_t c;
 231
 232     c.red   = ((color & pf->rmask) >> pf->rshift) << (16 - pf->rbits);
 233     c.green = ((color & pf->gmask) >> pf->gshift) << (16 - pf->gbits);
 234     c.blue  = ((color & pf->bmask) >> pf->bshift) << (16 - pf->bbits);
 235     c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);
 236     return c;
 237 }
 238
 239 pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,
 240                                                unsigned int ch)
 241 {
 242     pixman_image_t *glyph;
 243     uint8_t *data;
 244     bool bit;
 245     int x, y;
 246
 247     glyph = pixman_image_create_bits(PIXMAN_a8, 8, height,
 248                                      NULL, 0);
 249     data = (uint8_t *)pixman_image_get_data(glyph);
 250
 251     font += height * ch;
 252     for (y = 0; y < height; y++, font++) {
 253         for (x = 0; x < 8; x++, data++) {
 254             bit = (*font) & (1 << (7-x));
 255             *data = bit ? 0xff : 0x00;
 256         }
 257     }
 258     return glyph;
 259 }
 260
 261 void qemu_pixman_glyph_render(pixman_image_t *glyph,
 262                               pixman_image_t *surface,
 263                               pixman_color_t *fgcol,
 264                               pixman_color_t *bgcol,
 265                               int x, int y, int cw, int ch)
 266 {
 267     pixman_image_t *ifg = pixman_image_create_solid_fill(fgcol);
 268     pixman_image_t *ibg = pixman_image_create_solid_fill(bgcol);
 269
 270     pixman_image_composite(PIXMAN_OP_SRC, ibg, NULL, surface,
 271                            0, 0, 0, 0,
 272                            cw * x, ch * y,
 273                            cw, ch);
 274     pixman_image_composite(PIXMAN_OP_OVER, ifg, glyph, surface,
 275                            0, 0, 0, 0,
 276                            cw * x, ch * y,
 277                            cw, ch);
 278     pixman_image_unref(ifg);
 279     pixman_image_unref(ibg);
 280 }