VGA: Replace biosfn_load_text_* with vgafb_load_font().

The functions font loading functions are nearly identical - replace
    with one common function.

3 files changed, 30 insertions, 65 deletions

diff --git a/vgasrc/vga.c b/vgasrc/vga.c
index fd4ae28..0909c32 100644
--- a/vgasrc/vga.c
+++ b/vgasrc/vga.c
@@ -7,6 +7,7 @@
 
 
 // TODO:
+//  * remove recursion from biosfn_write_teletype()
 //  * review correctness of converted asm by comparing with RBIL
 //  * refactor redundant code into sub-functions
 //  * See if there is a method to the in/out stuff that can be encapsulated.
@@ -14,8 +15,6 @@
 //  * verify all funcs static
 //
 //  * convert vbe/clext code
-//
-//  * extract hw code from bios interfaces
 
 #include "bregs.h" // struct bregs
 #include "biosvar.h" // GET_BDA
@@ -774,20 +773,20 @@ handle_1010(struct bregs *regs)
 static void
 handle_101100(struct bregs *regs)
 {
-    biosfn_load_text_user_pat(regs->es, regs->bp
-                              , regs->cx, regs->dx, regs->bl, regs->bh);
+    vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
+                    , regs->dx, regs->bl, regs->bh);
 }
 
 static void
 handle_101101(struct bregs *regs)
 {
-    biosfn_load_text_8_14_pat(regs->bl);
+    vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
 }
 
 static void
 handle_101102(struct bregs *regs)
 {
-    biosfn_load_text_8_8_pat(regs->bl);
+    vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
 }
 
 static void
@@ -799,35 +798,35 @@ handle_101103(struct bregs *regs)
 static void
 handle_101104(struct bregs *regs)
 {
-    biosfn_load_text_8_16_pat(regs->bl);
+    vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
 }
 
 static void
 handle_101110(struct bregs *regs)
 {
-    biosfn_load_text_user_pat(regs->es, regs->bp
-                              , regs->cx, regs->dx, regs->bl, regs->bh);
+    vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
+                    , regs->dx, regs->bl, regs->bh);
     set_scan_lines(regs->bh);
 }
 
 static void
 handle_101111(struct bregs *regs)
 {
-    biosfn_load_text_8_14_pat(regs->bl);
+    vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
     set_scan_lines(14);
 }
 
 static void
 handle_101112(struct bregs *regs)
 {
-    biosfn_load_text_8_8_pat(regs->bl);
+    vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
     set_scan_lines(8);
 }
 
 static void
 handle_101114(struct bregs *regs)
 {
-    biosfn_load_text_8_16_pat(regs->bl);
+    vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
     set_scan_lines(16);
 }
 
diff --git a/vgasrc/vgafb.c b/vgasrc/vgafb.c
index 6e10702..605a3b6 100644
--- a/vgasrc/vgafb.c
+++ b/vgasrc/vgafb.c
@@ -9,6 +9,16 @@
 #include "util.h" // memset_far
 #include "vgatables.h" // find_vga_entry
 
+// TODO
+//  * extract hw code from framebuffer code
+//  * use clear_screen() in scroll code
+//  * merge car/attr/with_attr into one param
+//  * merge page/x/y into one param
+//  * combine biosfn_write_char_attr/_only()
+//  * read/write_char should take a position; should not take count
+//  * remove vmode_g->class (integrate into vmode_g->memmodel)
+//  * normalize params (don't use AX/BX/CX/etc.)
+
 // XXX
 inline void
 memcpy16_far(u16 d_seg, void *d_far, u16 s_seg, const void *s_far, size_t len)
@@ -604,57 +614,15 @@ biosfn_read_pixel(u8 BH, u16 CX, u16 DX, u16 *AX)
  ****************************************************************/
 
 void
-biosfn_load_text_user_pat(u16 ES, u16 BP, u16 CX, u16 DX, u8 BL, u8 BH)
-{
-    get_font_access();
-    u16 blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
-    u16 i;
-    for (i = 0; i < CX; i++) {
-        void *src_far = (void*)(BP + i * BH);
-        void *dest_far = (void*)(blockaddr + (DX + i) * 32);
-        memcpy_far(SEG_GRAPH, dest_far, ES, src_far, BH);
-    }
-    release_font_access();
-}
-
-void
-biosfn_load_text_8_14_pat(u8 BL)
-{
-    get_font_access();
-    u16 blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
-    u16 i;
-    for (i = 0; i < 0x100; i++) {
-        u16 src = i * 14;
-        void *dest_far = (void*)(blockaddr + i * 32);
-        memcpy_far(SEG_GRAPH, dest_far, get_global_seg(), &vgafont14[src], 14);
-    }
-    release_font_access();
-}
-
-void
-biosfn_load_text_8_8_pat(u8 BL)
+vgafb_load_font(u16 seg, void *src_far, u16 count
+                , u16 start, u8 destflags, u8 fontsize)
 {
     get_font_access();
-    u16 blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
+    u16 blockaddr = ((destflags & 0x03) << 14) + ((destflags & 0x04) << 11);
+    void *dest_far = (void*)(blockaddr + start*32);
     u16 i;
-    for (i = 0; i < 0x100; i++) {
-        u16 src = i * 8;
-        void *dest_far = (void*)(blockaddr + i * 32);
-        memcpy_far(SEG_GRAPH, dest_far, get_global_seg(), &vgafont8[src], 8);
-    }
-    release_font_access();
-}
-
-void
-biosfn_load_text_8_16_pat(u8 BL)
-{
-    get_font_access();
-    u16 blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
-    u16 i;
-    for (i = 0; i < 0x100; i++) {
-        u16 src = i * 16;
-        void *dest_far = (void*)(blockaddr + i * 32);
-        memcpy_far(SEG_GRAPH, dest_far, get_global_seg(), &vgafont16[src], 16);
-    }
+    for (i = 0; i < count; i++)
+        memcpy_far(SEG_GRAPH, dest_far + i*32
+                   , seg, src_far + i*fontsize, fontsize);
     release_font_access();
 }
diff --git a/vgasrc/vgatables.h b/vgasrc/vgatables.h
index 03ea613..df09686 100644
--- a/vgasrc/vgatables.h
+++ b/vgasrc/vgatables.h
@@ -172,10 +172,8 @@ void biosfn_write_char_only(u8 car, u8 page, u8 attr, u16 count);
 void biosfn_read_char_attr(u8 page, u16 *car);
 void biosfn_write_pixel(u8 BH, u8 AL, u16 CX, u16 DX);
 void biosfn_read_pixel(u8 BH, u16 CX, u16 DX, u16 *AX);
-void biosfn_load_text_user_pat(u16 ES, u16 BP, u16 CX, u16 DX, u8 BL, u8 BH);
-void biosfn_load_text_8_14_pat(u8 BL);
-void biosfn_load_text_8_8_pat(u8 BL);
-void biosfn_load_text_8_16_pat(u8 BL);
+void vgafb_load_font(u16 seg, void *src_far, u16 count
+                     , u16 start, u8 destflags, u8 fontsize);
 
 // vgaio.c
 void vgahw_screen_disable();