diff options
| -rw-r--r-- | platform/x11/x11_image.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/platform/x11/x11_image.c b/platform/x11/x11_image.c index 4f2db2e8..329a58b8 100644 --- a/platform/x11/x11_image.c +++ b/platform/x11/x11_image.c @@ -688,6 +688,66 @@ ximage_convert_bgr233(PARAMS) } } +static void +ximage_convert_generic(PARAMS) +{ + unsigned long rm, gm, bm, rs, gs, bs, rx, bx, gx; + unsigned long pixel; + unsigned long r, g, b; + int x, y; + + rm = info.visual.red_mask; + gm = info.visual.green_mask; + bm = info.visual.blue_mask; + + rs = ffs(rm) - 1; + gs = ffs(gm) - 1; + bs = ffs(bm) - 1; + + rx = ffs(~(rm >> rs)) - 1; + gx = ffs(~(gm >> gs)) - 1; + bx = ffs(~(bm >> bs)) - 1; + + for (y = 0; y < h; y++) { + for (x = 0; x < w; x++) { + r = src[4*x + 0]; + g = src[4*x + 1]; + b = src[4*x + 2]; + + /* adjust precision */ + if (rx < 8) r >>= (8 - rx); else if (rx > 8) r <<= (rx - 8); + if (gx < 8) g >>= (8 - gx); else if (gx > 8) g <<= (gx - 8); + if (bx < 8) b >>= (8 - bx); else if (bx > 8) b <<= (bx - 8); + + pixel = (r << rs) | (g << gs) | (b << bs); + + if (ImageByteOrder(info.display) == MSBFirst) { + if (info.bitsperpixel > 16) { + dst[4*x + 0] = (pixel >> 24) & 0xFF; + dst[4*x + 1] = (pixel >> 16) & 0xFF; + dst[4*x + 2] = (pixel >> 8) & 0xFF; + dst[4*x + 3] = (pixel) & 0xFF; + } else if (info.bitsperpixel > 8) { + dst[2*x + 0] = (pixel >> 8) & 0xFF; + dst[2*x + 1] = (pixel) & 0xFF; + } + } else { + if (info.bitsperpixel > 16) { + dst[4*x + 0] = (pixel) & 0xFF; + dst[4*x + 1] = (pixel >> 8) & 0xFF; + dst[4*x + 2] = (pixel >> 16) & 0xFF; + dst[4*x + 3] = (pixel >> 24) & 0xFF; + } else if (info.bitsperpixel > 8) { + dst[2*x + 0] = (pixel) & 0xFF; + dst[2*x + 1] = (pixel >> 8) & 0xFF; + } + } + } + src += srcstride; + dst += dststride; + } +} + ximage_convert_func_t ximage_convert_funcs[] = { ximage_convert_argb8888, ximage_convert_bgra8888, @@ -700,4 +760,5 @@ ximage_convert_func_t ximage_convert_funcs[] = { ximage_convert_rgb555, ximage_convert_rgb555_br, ximage_convert_bgr233, + ximage_convert_generic }; |