diff options
Diffstat (limited to 'vgasrc/stdvga.c')
| -rw-r--r-- | vgasrc/stdvga.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/vgasrc/stdvga.c b/vgasrc/stdvga.c index 9d8f556f..da67af41 100644 --- a/vgasrc/stdvga.c +++ b/vgasrc/stdvga.c @@ -275,6 +275,14 @@ stdvga_set_window(struct vgamode_s *curmode_g, int window, int val) return -1; } +// Minimum framebuffer bytes between each vertical line for given mode +int +stdvga_minimum_linelength(struct vgamode_s *vmode_g) +{ + return DIV_ROUND_UP(GET_GLOBAL(vmode_g->width) * vga_bpp(vmode_g), 8); +} + +// Return number of framebuffer bytes between start of each vertical line int stdvga_get_linelength(struct vgamode_s *curmode_g) { @@ -282,6 +290,7 @@ stdvga_get_linelength(struct vgamode_s *curmode_g) return val * 8 / stdvga_vram_ratio(curmode_g); } +// Set number of framebuffer bytes between start of each vertical line int stdvga_set_linelength(struct vgamode_s *curmode_g, int val) { @@ -290,6 +299,7 @@ stdvga_set_linelength(struct vgamode_s *curmode_g, int val) return 0; } +// Return framebuffer offset of first byte of displayed content int stdvga_get_displaystart(struct vgamode_s *curmode_g) { @@ -299,6 +309,7 @@ stdvga_get_displaystart(struct vgamode_s *curmode_g) return addr * 4 / stdvga_vram_ratio(curmode_g); } +// Set framebuffer offset of first byte of displayed content int stdvga_set_displaystart(struct vgamode_s *curmode_g, int val) { @@ -321,11 +332,6 @@ stdvga_set_dacformat(struct vgamode_s *curmode_g, int val) return -1; } -int -stdvga_get_linesize(struct vgamode_s *vmode_g) -{ - return DIV_ROUND_UP(GET_GLOBAL(vmode_g->width) * vga_bpp(vmode_g), 8); -} /**************************************************************** * Save/Restore state |