diff options
Diffstat (limited to 'com32/lib/sys/vesa/background.c')
| -rw-r--r-- | com32/lib/sys/vesa/background.c | 55 |
1 files changed, 38 insertions, 17 deletions
diff --git a/com32/lib/sys/vesa/background.c b/com32/lib/sys/vesa/background.c index 2e5b108f..2dccfce9 100644 --- a/com32/lib/sys/vesa/background.c +++ b/com32/lib/sys/vesa/background.c @@ -239,29 +239,50 @@ static int read_jpeg_file(FILE *fp, uint8_t *header, int len) return rv; } +/* Simple grey Gaussian hole, enough to look interesting */ +static void default_background(void) +{ + int x, y, dx, dy, dy2; + uint8_t *bgptr = (uint8_t *)&__vesacon_background; + uint8_t c; + + for (y = 0, dy = -VIDEO_Y_SIZE/2; y < VIDEO_Y_SIZE; y++, dy++) { + dy2 = dy*dy; + for (x = 0, dx = -VIDEO_X_SIZE/2; x < VIDEO_X_SIZE; x++, dx++) { + c = ((dx*dx+dy2) >> 11) + 88; + *bgptr++ = c; + *bgptr++ = c; + *bgptr++ = c; + bgptr++; /* Dummy alpha */ + } + } +} + int vesacon_load_background(const char *filename) { - FILE *fp; + FILE *fp = NULL; uint8_t header[8]; int rv = 1; - if (!filename) { - draw_background(); - return 0; - } - - fp = fopen(filename, "r"); + if (__vesacon_pixel_format == PXF_NONE) + return 0; /* Not in graphics mode */ - if (!fp) - goto err; - - if (fread(header, 1, 8, fp) != 8) - goto err; - - if (!png_sig_cmp(header, 0, 8)) { - rv = read_png_file(fp); - } else if (!jpeg_sig_cmp(header, 8)) { - rv = read_jpeg_file(fp, header, 8); + if (!filename) { + default_background(); + } else { + fp = fopen(filename, "r"); + + if (!fp) + goto err; + + if (fread(header, 1, 8, fp) != 8) + goto err; + + if (!png_sig_cmp(header, 0, 8)) { + rv = read_png_file(fp); + } else if (!jpeg_sig_cmp(header, 8)) { + rv = read_jpeg_file(fp, header, 8); + } } /* This actually displays the stuff */ |