From de307661b6ce96e61e20a123b00297dbc57d5d85 Mon Sep 17 00:00:00 2001 From: Derek Foreman Date: Wed, 19 Mar 2003 23:26:54 +0000 Subject: added depth reduction and startup for true color visuals 16bpp should now work --- render/color.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) (limited to 'render/color.c') diff --git a/render/color.c b/render/color.c index 0cf7b226..10ad5e3b 100644 --- a/render/color.c +++ b/render/color.c @@ -58,3 +58,48 @@ void color_free(color_rgb *c) XFreeGC(ob_display, c->gc); free(c); } + +void reduce_depth(pixel32 *data, XImage *im) +{ + // since pixel32 is the largest possible pixel size, we can share the array + int r, g, b; + int x,y; + pixel16 *p = (pixel16*) data; + switch (im->bits_per_pixel) { + case 32: + if ((render_red_offset != default_red_shift) || + (render_blue_offset != default_blue_shift) || + (render_green_offset != default_green_shift)) { + for (y = 0; y < im->height; y++) { + for (x = 0; x < im->width; x++) { + r = (data[x] >> default_red_shift) & 0xFF; + g = (data[x] >> default_green_shift) & 0xFF; + b = (data[x] >> default_blue_shift) & 0xFF; + data[x] = (r << render_red_offset) + (g << render_green_offset) + + (b << render_blue_offset); + } + data += im->width; + } + } + break; + case 16: + for (y = 0; y < im->height; y++) { + for (x = 0; x < im->width; x++) { + r = (data[x] >> default_red_shift) & 0xFF; + r = r >> render_red_shift; + g = (data[x] >> default_green_shift) & 0xFF; + g = g >> render_green_shift; + b = (data[x] >> default_blue_shift) & 0xFF; + b = b >> render_blue_shift; + p[x] = (r << render_red_offset) + + (g << render_green_offset) + + (b << render_blue_offset); + } + data += im->width; + p += im->bytes_per_line/2; + } + break; + default: + g_message("your bit depth is currently unhandled\n"); + } +} -- cgit v1.2.3