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 #include "standard-headers/drm/drm_fourcc.h"
  10
  11 PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format)
  12 {
  13     PixelFormat pf;
  14     uint8_t bpp;
  15
  16     bpp = pf.bits_per_pixel = PIXMAN_FORMAT_BPP(format);
  17     pf.bytes_per_pixel = PIXMAN_FORMAT_BPP(format) / 8;
  18     pf.depth = PIXMAN_FORMAT_DEPTH(format);
  19
  20     pf.abits = PIXMAN_FORMAT_A(format);
  21     pf.rbits = PIXMAN_FORMAT_R(format);
  22     pf.gbits = PIXMAN_FORMAT_G(format);
  23     pf.bbits = PIXMAN_FORMAT_B(format);
  24
  25     switch (PIXMAN_FORMAT_TYPE(format)) {
  26     case PIXMAN_TYPE_ARGB:
  27         pf.ashift = pf.bbits + pf.gbits + pf.rbits;
  28         pf.rshift = pf.bbits + pf.gbits;
  29         pf.gshift = pf.bbits;
  30         pf.bshift = 0;
  31         break;
  32     case PIXMAN_TYPE_ABGR:
  33         pf.ashift = pf.rbits + pf.gbits + pf.bbits;
  34         pf.bshift = pf.rbits + pf.gbits;
  35         pf.gshift = pf.rbits;
  36         pf.rshift = 0;
  37         break;
  38     case PIXMAN_TYPE_BGRA:
  39         pf.bshift = bpp - pf.bbits;
  40         pf.gshift = bpp - (pf.bbits + pf.gbits);
  41         pf.rshift = bpp - (pf.bbits + pf.gbits + pf.rbits);
  42         pf.ashift = 0;
  43         break;
  44     case PIXMAN_TYPE_RGBA:
  45         pf.rshift = bpp - pf.rbits;
  46         pf.gshift = bpp - (pf.rbits + pf.gbits);
  47         pf.bshift = bpp - (pf.rbits + pf.gbits + pf.bbits);
  48         pf.ashift = 0;
  49         break;
  50     default:
  51         g_assert_not_reached();
  52         break;
  53     }
  54
  55     pf.amax = (1 << pf.abits) - 1;
  56     pf.rmax = (1 << pf.rbits) - 1;
  57     pf.gmax = (1 << pf.gbits) - 1;
  58     pf.bmax = (1 << pf.bbits) - 1;
  59     pf.amask = pf.amax << pf.ashift;
  60     pf.rmask = pf.rmax << pf.rshift;
  61     pf.gmask = pf.gmax << pf.gshift;
  62     pf.bmask = pf.bmax << pf.bshift;
  63
  64     return pf;
  65 }
  66
  67 pixman_format_code_t qemu_default_pixman_format(int bpp, bool native_endian)
  68 {
  69     if (native_endian) {
  70         switch (bpp) {
  71         case 15:
  72             return PIXMAN_x1r5g5b5;
  73         case 16:
  74             return PIXMAN_r5g6b5;
  75         case 24:
  76             return PIXMAN_r8g8b8;
  77         case 32:
  78             return PIXMAN_x8r8g8b8;
  79         }
  80     } else {
  81         switch (bpp) {
  82         case 24:
  83             return PIXMAN_b8g8r8;
  84         case 32:
  85             return PIXMAN_b8g8r8x8;
  86         break;
  87         }
  88     }
  89     return 0;
  90 }
  91
  92 /* Note: drm is little endian, pixman is native endian */
  93 pixman_format_code_t qemu_drm_format_to_pixman(uint32_t drm_format)
  94 {
  95     static const struct {
  96         uint32_t drm_format;
  97         pixman_format_code_t pixman;
  98     } map[] = {
  99         { DRM_FORMAT_RGB888,   PIXMAN_LE_r8g8b8   },
 100         { DRM_FORMAT_ARGB8888, PIXMAN_LE_a8r8g8b8 },
 101         { DRM_FORMAT_XRGB8888, PIXMAN_LE_x8r8g8b8 }
 102     };
 103     int i;
 104
 105     for (i = 0; i < ARRAY_SIZE(map); i++) {
 106         if (drm_format == map[i].drm_format) {
 107             return map[i].pixman;
 108         }
 109     }
 110     return 0;
 111 }
 112
 113 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
 114 {
 115     int type = PIXMAN_TYPE_OTHER;
 116
 117     if (rshift > gshift && gshift > bshift) {
 118         if (bshift == 0) {
 119             type = PIXMAN_TYPE_ARGB;
 120         } else {
 121             type = PIXMAN_TYPE_RGBA;
 122         }
 123     } else if (rshift < gshift && gshift < bshift) {
 124         if (rshift == 0) {
 125             type = PIXMAN_TYPE_ABGR;
 126         } else {
 127             type = PIXMAN_TYPE_BGRA;
 128         }
 129     }
 130     return type;
 131 }
 132
 133 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
 134 {
 135     pixman_format_code_t format;
 136     int type;
 137
 138     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
 139     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
 140                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
 141     if (!pixman_format_supported_source(format)) {
 142         return 0;
 143     }
 144     return format;
 145 }
 146
 147 /*
 148  * Return true for known-good pixman conversions.
 149  *
 150  * UIs using pixman for format conversion can hook this into
 151  * DisplayChangeListenerOps->dpy_gfx_check_format
 152  */
 153 bool qemu_pixman_check_format(DisplayChangeListener *dcl,
 154                               pixman_format_code_t format)
 155 {
 156     switch (format) {
 157     /* 32 bpp */
 158     case PIXMAN_x8r8g8b8:
 159     case PIXMAN_a8r8g8b8:
 160     case PIXMAN_b8g8r8x8:
 161     case PIXMAN_b8g8r8a8:
 162     /* 24 bpp */
 163     case PIXMAN_r8g8b8:
 164     case PIXMAN_b8g8r8:
 165     /* 16 bpp */
 166     case PIXMAN_x1r5g5b5:
 167     case PIXMAN_r5g6b5:
 168         return true;
 169     default:
 170         return false;
 171     }
 172 }
 173
 174 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
 175                                            int width)
 176 {
 177     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
 178     assert(image != NULL);
 179     return image;
 180 }
 181
 182 /* fill linebuf from framebuffer */
 183 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
 184                               int width, int x, int y)
 185 {
 186     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
 187                            x, y, 0, 0, 0, 0, width, 1);
 188 }
 189
 190 /* copy linebuf to framebuffer */
 191 void qemu_pixman_linebuf_copy(pixman_image_t *fb, int width, int x, int y,
 192                               pixman_image_t *linebuf)
 193 {
 194     pixman_image_composite(PIXMAN_OP_SRC, linebuf, NULL, fb,
 195                            0, 0, 0, 0, x, y, width, 1);
 196 }
 197
 198 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
 199                                           pixman_image_t *image)
 200 {
 201     return pixman_image_create_bits(format,
 202                                     pixman_image_get_width(image),
 203                                     pixman_image_get_height(image),
 204                                     NULL,
 205                                     pixman_image_get_stride(image));
 206 }
 207
 208 void qemu_pixman_image_unref(pixman_image_t *image)
 209 {
 210     if (image == NULL) {
 211         return;
 212     }
 213     pixman_image_unref(image);
 214 }
 215
 216 pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color)
 217 {
 218     pixman_color_t c;
 219
 220     c.red   = ((color & pf->rmask) >> pf->rshift) << (16 - pf->rbits);
 221     c.green = ((color & pf->gmask) >> pf->gshift) << (16 - pf->gbits);
 222     c.blue  = ((color & pf->bmask) >> pf->bshift) << (16 - pf->bbits);
 223     c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);
 224     return c;
 225 }
 226
 227 pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,
 228                                                unsigned int ch)
 229 {
 230     pixman_image_t *glyph;
 231     uint8_t *data;
 232     bool bit;
 233     int x, y;
 234
 235     glyph = pixman_image_create_bits(PIXMAN_a8, 8, height,
 236                                      NULL, 0);
 237     data = (uint8_t *)pixman_image_get_data(glyph);
 238
 239     font += height * ch;
 240     for (y = 0; y < height; y++, font++) {
 241         for (x = 0; x < 8; x++, data++) {
 242             bit = (*font) & (1 << (7-x));
 243             *data = bit ? 0xff : 0x00;
 244         }
 245     }
 246     return glyph;
 247 }
 248
 249 void qemu_pixman_glyph_render(pixman_image_t *glyph,
 250                               pixman_image_t *surface,
 251                               pixman_color_t *fgcol,
 252                               pixman_color_t *bgcol,
 253                               int x, int y, int cw, int ch)
 254 {
 255     pixman_image_t *ifg = pixman_image_create_solid_fill(fgcol);
 256     pixman_image_t *ibg = pixman_image_create_solid_fill(bgcol);
 257
 258     pixman_image_composite(PIXMAN_OP_SRC, ibg, NULL, surface,
 259                            0, 0, 0, 0,
 260                            cw * x, ch * y,
 261                            cw, ch);
 262     pixman_image_composite(PIXMAN_OP_OVER, ifg, glyph, surface,
 263                            0, 0, 0, 0,
 264                            cw * x, ch * y,
 265                            cw, ch);
 266     pixman_image_unref(ifg);
 267     pixman_image_unref(ibg);
 268 }