vgabios: Unify page size calculations; remove page size from vgamode_s.

[seabios.git] / vgasrc / vgafb.c

diff --git a/vgasrc/vgafb.c b/vgasrc/vgafb.c
index 85e4ab3e9fbc6d26479625c04c517de3036992c4..b93373821a01f1f249b48134b8d4b118b230d998 100644 (file)
--- a/vgasrc/vgafb.c
+++ b/vgasrc/vgafb.c
@@ -75,7 +75,7 @@ scroll_cga(struct vgamode_s *vmode_g, int nblines, int attr
             , struct cursorpos ul, struct cursorpos lr)
 {
     int cheight = GET_GLOBAL(vmode_g->cheight) / 2;
-    int cwidth = GET_GLOBAL(vmode_g->pixbits);
+    int cwidth = GET_GLOBAL(vmode_g->depth);
     int stride = GET_BDA(video_cols) * cwidth;
     void *src_far, *dest_far;
     if (nblines >= 0) {
@@ -139,10 +139,8 @@ scroll_text(struct vgamode_s *vmode_g, int nblines, int attr
 {
     int cheight = 1;
     int cwidth = 2;
-    u16 nbrows = GET_BDA(video_rows) + 1;
-    u16 nbcols = GET_BDA(video_cols);
-    int stride = nbcols * cwidth;
-    void *src_far, *dest_far = (void*)SCREEN_MEM_START(nbcols, nbrows, ul.page);
+    int stride = GET_BDA(video_cols) * cwidth;
+    void *src_far, *dest_far = (void*)(GET_BDA(video_pagesize) * ul.page);
     if (nblines >= 0) {
         dest_far += ul.y * cheight * stride + ul.x * cwidth;
         src_far = dest_far + nblines * cheight * stride;
@@ -176,18 +174,17 @@ vgafb_scroll(int nblines, int attr, struct cursorpos ul, struct cursorpos lr)
 
     // FIXME gfx mode not complete
     switch (GET_GLOBAL(vmode_g->memmodel)) {
-    case CTEXT:
-    case MTEXT:
+    case MM_TEXT:
         scroll_text(vmode_g, nblines, attr, ul, lr);
         break;
-    case PLANAR4:
-    case PLANAR1:
+    case MM_PLANAR:
         scroll_pl4(vmode_g, nblines, attr, ul, lr);
         break;
-    case CGA:
+    case MM_CGA:
         scroll_cga(vmode_g, nblines, attr, ul, lr);
         break;
-    case LINEAR8:
+    case MM_DIRECT:
+    case MM_PACKED:
         scroll_lin(vmode_g, nblines, attr, ul, lr);
         break;
     }
@@ -254,7 +251,7 @@ write_gfx_char_cga(struct vgamode_s *vmode_g
         return;
 
     u8 *fdata_g = vgafont8;
-    u8 bpp = GET_GLOBAL(vmode_g->pixbits);
+    u8 bpp = GET_GLOBAL(vmode_g->depth);
     u16 addr = (cp.x * bpp) + cp.y * 320;
     u16 src = ca.car * 8;
     u8 i;
@@ -331,12 +328,9 @@ static void
 write_text_char(struct vgamode_s *vmode_g
                 , struct cursorpos cp, struct carattr ca)
 {
-    // Get the dimensions
-    u16 nbrows = GET_BDA(video_rows) + 1;
-    u16 nbcols = GET_BDA(video_cols);
-
     // Compute the address
-    void *address_far = (void*)(SCREEN_MEM_START(nbcols, nbrows, cp.page)
+    u16 nbcols = GET_BDA(video_cols);
+    void *address_far = (void*)(GET_BDA(video_pagesize) * cp.page
                                 + (cp.x + cp.y * nbcols) * 2);
 
     if (ca.use_attr) {
@@ -357,18 +351,17 @@ vgafb_write_char(struct cursorpos cp, struct carattr ca)
 
     // FIXME gfx mode not complete
     switch (GET_GLOBAL(vmode_g->memmodel)) {
-    case CTEXT:
-    case MTEXT:
+    case MM_TEXT:
         write_text_char(vmode_g, cp, ca);
         break;
-    case PLANAR4:
-    case PLANAR1:
+    case MM_PLANAR:
         write_gfx_char_pl4(vmode_g, cp, ca);
         break;
-    case CGA:
+    case MM_CGA:
         write_gfx_char_cga(vmode_g, cp, ca);
         break;
-    case LINEAR8:
+    case MM_DIRECT:
+    case MM_PACKED:
         write_gfx_char_lin(vmode_g, cp, ca);
         break;
     }
@@ -382,18 +375,15 @@ vgafb_read_char(struct cursorpos cp)
     if (!vmode_g)
         goto fail;
 
-    if (!(GET_GLOBAL(vmode_g->memmodel) & TEXT)) {
+    if (GET_GLOBAL(vmode_g->memmodel) != MM_TEXT) {
         // FIXME gfx mode
         dprintf(1, "Read char in graphics mode\n");
         goto fail;
     }
 
-    // Get the dimensions
-    u16 nbrows = GET_BDA(video_rows) + 1;
-    u16 nbcols = GET_BDA(video_cols);
-
     // Compute the address
-    u16 *address_far = (void*)(SCREEN_MEM_START(nbcols, nbrows, cp.page)
+    u16 nbcols = GET_BDA(video_cols);
+    u16 *address_far = (void*)(GET_BDA(video_pagesize) * cp.page
                                + (cp.x + cp.y * nbcols) * 2);
     u16 v = GET_FARVAR(GET_GLOBAL(vmode_g->sstart), *address_far);
     struct carattr ca = {v, v>>8, 0};
@@ -416,13 +406,10 @@ vgafb_write_pixel(u8 color, u16 x, u16 y)
     struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
     if (!vmode_g)
         return;
-    if (GET_GLOBAL(vmode_g->memmodel) & TEXT)
-        return;
 
     u8 *addr_far, mask, attr, data;
     switch (GET_GLOBAL(vmode_g->memmodel)) {
-    case PLANAR4:
-    case PLANAR1:
+    case MM_PLANAR:
         addr_far = (void*)(x / 8 + y * GET_BDA(video_cols));
         mask = 0x80 >> (x & 0x07);
         stdvga_grdc_write(0x08, mask);
@@ -435,15 +422,15 @@ vgafb_write_pixel(u8 color, u16 x, u16 y)
         stdvga_grdc_write(0x05, 0x00);
         stdvga_grdc_write(0x03, 0x00);
         break;
-    case CGA:
-        if (GET_GLOBAL(vmode_g->pixbits) == 2)
+    case MM_CGA:
+        if (GET_GLOBAL(vmode_g->depth) == 2)
             addr_far = (void*)((x >> 2) + (y >> 1) * 80);
         else
             addr_far = (void*)((x >> 3) + (y >> 1) * 80);
         if (y & 1)
             addr_far += 0x2000;
         data = GET_FARVAR(SEG_CTEXT, *addr_far);
-        if (GET_GLOBAL(vmode_g->pixbits) == 2) {
+        if (GET_GLOBAL(vmode_g->depth) == 2) {
             attr = (color & 0x03) << ((3 - (x & 0x03)) * 2);
             mask = 0x03 << ((3 - (x & 0x03)) * 2);
         } else {
@@ -458,10 +445,13 @@ vgafb_write_pixel(u8 color, u16 x, u16 y)
         }
         SET_FARVAR(SEG_CTEXT, *addr_far, data);
         break;
-    case LINEAR8:
+    case MM_DIRECT:
+    case MM_PACKED:
         addr_far = (void*)(x + y * (GET_BDA(video_cols) * 8));
         SET_FARVAR(SEG_GRAPH, *addr_far, color);
         break;
+    case MM_TEXT:
+        return;
     }
 }
 
@@ -472,13 +462,10 @@ vgafb_read_pixel(u16 x, u16 y)
     struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
     if (!vmode_g)
         return 0;
-    if (GET_GLOBAL(vmode_g->memmodel) & TEXT)
-        return 0;
 
     u8 *addr_far, mask, attr=0, data, i;
     switch (GET_GLOBAL(vmode_g->memmodel)) {
-    case PLANAR4:
-    case PLANAR1:
+    case MM_PLANAR:
         addr_far = (void*)(x / 8 + y * GET_BDA(video_cols));
         mask = 0x80 >> (x & 0x07);
         attr = 0x00;
@@ -489,20 +476,23 @@ vgafb_read_pixel(u16 x, u16 y)
                 attr |= (0x01 << i);
         }
         break;
-    case CGA:
+    case MM_CGA:
         addr_far = (void*)((x >> 2) + (y >> 1) * 80);
         if (y & 1)
             addr_far += 0x2000;
         data = GET_FARVAR(SEG_CTEXT, *addr_far);
-        if (GET_GLOBAL(vmode_g->pixbits) == 2)
+        if (GET_GLOBAL(vmode_g->depth) == 2)
             attr = (data >> ((3 - (x & 0x03)) * 2)) & 0x03;
         else
             attr = (data >> (7 - (x & 0x07))) & 0x01;
         break;
-    case LINEAR8:
+    case MM_DIRECT:
+    case MM_PACKED:
         addr_far = (void*)(x + y * (GET_BDA(video_cols) * 8));
         attr = GET_FARVAR(SEG_GRAPH, *addr_far);
         break;
+    case MM_TEXT:
+        return 0;
     }
     return attr;
 }