Commit yaboot 1.3.0

[yaboot.git] / second / gui / pcx.c

diff --git a/second/gui/pcx.c b/second/gui/pcx.c
new file mode 100644 (file)
index 0000000..0509777
--- /dev/null
+++ b/second/gui/pcx.c
@@ -0,0 +1,31 @@
+/* Crude PCX file loading and display for 640x480 image at boot */
+
+unsigned char *pcxColormap(unsigned char *gfx_file, int gfx_len)
+{
+  return(gfx_file + gfx_len - 768);
+}
+
+extern void scrPutPixel( int x, int y, unsigned char c );
+
+static void inline do_putpixel(int offset, unsigned char c)
+{
+   scrPutPixel(offset % 640, offset / 640, c);
+}
+
+void pcxDisplay(unsigned char *gfx_file, unsigned gfx_len)
+{
+  int offset, file_offset, i, c, f;
+
+  for(offset = 0, file_offset = 128; offset < 640 * 480 && file_offset < gfx_len - 769; file_offset++)
+  {
+     if(((c = gfx_file[file_offset]) & 0xc0) == 0xc0)
+     {
+        f = gfx_file[++file_offset];
+        c &= 0x3f;
+        for(i = 0; i < c; ++i)
+           do_putpixel(offset++, f);
+     }
+     else
+        do_putpixel(offset++, c);
+  }
+}