Commit yaboot 1.3.0

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

diff --git a/second/gui/video.c b/second/gui/video.c
new file mode 100644 (file)
index 0000000..b3bd572
--- /dev/null
+++ b/second/gui/video.c
@@ -0,0 +1,147 @@
+#include "prom.h"
+
+#define WINDOW_X_SIZE 640
+#define WINDOW_Y_SIZE 480
+
+
+static prom_handle videodev;
+static prom_handle videop;
+static int Xres, Yres;
+static int Xstart, Ystart;
+static int rowbytes;
+static int zoom;
+static unsigned char *address;
+
+static int scrSetColorMap( unsigned char color,
+       unsigned char r, unsigned char g, unsigned char b );
+
+
+int scrOpen()
+{
+  int result = 0;
+ 
+  videodev = (prom_handle)call_prom( "open", 1, 1, "screen" );
+  if( videodev == PROM_INVALID_HANDLE )
+     return(-1);
+  videop = (prom_handle)call_prom( "instance-to-package", 1, 1, videodev );
+  if( videop == PROM_INVALID_HANDLE )
+     return(-1);
+
+  result |= prom_getprop(videop, "width", &Xres, 4 );
+  result |= prom_getprop(videop, "height", &Yres, 4 );
+  result |= prom_getprop(videop, "address", &address, 4 );
+  result |= prom_getprop(videop, "linebytes", &rowbytes, 4 );
+
+  prom_map (address, address, rowbytes * Xres);
+
+#if DEBUG
+  prom_printf("width     : %d\n", Xres);
+  prom_printf("height    : %d\n", Yres);
+  prom_printf("address   : 0x%08lx\n", address);
+  prom_printf("linebytes : %d\n", rowbytes);
+  prom_printf("result    : %d\n", result);
+#endif
+ 
+  if( result < 0 )
+     return( -1 );
+
+  zoom = Xres / WINDOW_X_SIZE > Yres / WINDOW_Y_SIZE ? Yres / WINDOW_Y_SIZE : Xres / WINDOW_X_SIZE;
+
+  Xstart = Xres / 2 - WINDOW_X_SIZE / 2 * zoom;
+  Ystart = Yres / 2 - WINDOW_Y_SIZE / 2 * zoom;
+
+#if DEBUG
+  prom_printf("zoom      : %d\n", zoom);
+  prom_printf("Xstart    : %d\n", Xstart);
+  prom_printf("Ystart    : %d\n", Ystart);
+#endif
+
+  return( 0 );
+}
+
+
+void scrClear( unsigned char c )
+{
+  int x, y;
+
+  for (y = 0; y < Yres; y++)
+       for (x = 0; x < Xres; x++)
+               address[y * rowbytes + x] = c;
+}
+
+
+void scrClose()
+{
+  call_prom( "close", 1, 0, videodev );
+  videodev = 0;
+}
+
+
+void scrReset()
+{
+  int c;
+  extern unsigned char color_table_red[],
+                       color_table_green[],
+                       color_table_blue[];
+
+  for( c = 0; c < 16; ++c )
+     scrSetColorMap( c, color_table_red[c],
+                        color_table_green[c],
+                        color_table_blue[c] );
+//  scrClose();
+}
+
+static void inline do_pix( int x, int y, unsigned char c )
+{
+  address[ y * rowbytes + x ] = c;
+}
+
+
+void scrPutPixel( int x, int y, unsigned char c )
+{
+  int zx, zy;
+
+  for( zy = 0; zy < zoom; ++zy )
+     for( zx = 0; zx < zoom; ++zx )
+        do_pix( x * zoom + zx + Xstart, y * zoom + zy + Ystart, c );
+}
+
+
+int scrSetColorMap( unsigned char color, unsigned char r, unsigned char g, unsigned char b )
+{
+  int result;
+
+  result = (int)call_prom( "call-method", 6, 1, "color!", videodev, color, b, g, r );
+
+  return( result );
+}
+
+
+void scrFillColorMap( unsigned char r, unsigned char g, unsigned char b )
+{
+  int c;
+
+  for( c = 0; c < 256; ++c )
+     scrSetColorMap( c, r, g, b );
+}
+
+
+void scrSetEntireColorMap( unsigned char *map )
+{
+  int c;
+
+  for( c = 0; c < 256; ++c )
+     scrSetColorMap( c, map[c * 3], map[c * 3 + 1], map[c * 3 + 2] );
+}
+
+
+void scrFadeColorMap( unsigned char *first, unsigned char *last, int rate )
+{
+  int inc, c;
+
+  for( inc = 0; inc < 256; inc += rate )
+     for( c = 0; c < 256; ++c )
+        scrSetColorMap( c, first[c * 3 + 0] * (255 - inc) / 255 + last[c * 3 + 0] * inc / 255,
+                           first[c * 3 + 1] * (255 - inc) / 255 + last[c * 3 + 1] * inc / 255,
+                           first[c * 3 + 2] * (255 - inc) / 255 + last[c * 3 + 2] * inc / 255 );
+}