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