stdvga: Rename CGA palette functions

Rename stdvga_set_border_color() to stdvga_set_cga_background_color()
and stdvga_set_palette() to stdvga_set_cga_palette().  These functions
implement compatibility for old CGA cards - rename them so they are
not confused with the functions that manipulte the VGA palette.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 14 insertions, 9 deletions

diff --git a/vgasrc/stdvga.c b/vgasrc/stdvga.c
index da67af4..eac0357 100644
--- a/vgasrc/stdvga.c
+++ b/vgasrc/stdvga.c
@@ -18,19 +18,32 @@
  * Attribute control
  ****************************************************************/
 
+// Emulate CGA background setting via VGA palette index registers
 void
-stdvga_set_border_color(u8 color)
+stdvga_set_cga_background_color(u8 color)
 {
+    // Set the background color (via palette index 0)
     u8 v1 = color & 0x0f;
     if (v1 & 0x08)
         v1 += 0x08;
     stdvga_attr_write(0x00, v1);
 
+    // Dim/brighten foreground (see pal_cga[] in stdvgamodes.c)
     int i;
     for (i = 1; i < 4; i++)
         stdvga_attr_mask(i, 0x10, color & 0x10);
 }
 
+// Emulate CGA palette setting by altering VGA palette index registers
+void
+stdvga_set_cga_palette(u8 palid)
+{
+    // Switch foreground colors (see pal_cga[] in stdvgamodes.c)
+    int i;
+    for (i = 1; i < 4; i++)
+        stdvga_attr_mask(i, 0x01, palid & 0x01);
+}
+
 void
 stdvga_set_overscan_border_color(u8 color)
 {
@@ -44,14 +57,6 @@ stdvga_get_overscan_border_color(void)
 }
 
 void
-stdvga_set_palette(u8 palid)
-{
-    int i;
-    for (i = 1; i < 4; i++)
-        stdvga_attr_mask(i, 0x01, palid & 0x01);
-}
-
-void
 stdvga_set_all_palette_reg(u16 seg, u8 *data_far)
 {
     int i;