static adv_error vgaline_mode_generate_text(vgaline_video_mode* mode, const adv_crtc* crtc, unsigned flags)
{
mode->is_text = 1;
mode->crtc = *crtc;
if (crtc->hde % 9 == 0 && crtc->hrs % 9 == 0 && crtc->hre % 9 == 0 && crtc->ht % 9 == 0) {
mode->font_x = 9;
} else if (crtc->hde % 8 == 0 && crtc->hrs % 2 == 0 && crtc->hre % 2 == 0 && crtc->ht % 2 == 0) {
mode->font_x = 8;
} else {
error_nolog_set("Unsupported horizontal crtc values. Only multiple of 8 or 9 pixels are supported.\n");
return -1;
}
if (video_mode_generate_check("vgaline", vgaline_flags(), 1, 1024, crtc, flags)!=0)
return -1;
mode->font_y = crtc->vde / 25;
if (mode->font_y >= 16)
mode->font_y = 16;
else if (mode->font_y >= 14)
mode->font_y = 14;
else
mode->font_y = 8;
return 0;
}
static adv_error none_mode_generate(none_video_mode* mode, const adv_crtc* crtc, unsigned flags)
{
assert(none_is_active());
if (video_mode_generate_check("none", none_flags(), 8, 2048, crtc, flags) != 0)
return -1;
mode->crtc = *crtc;
mode->index = flags & MODE_FLAGS_INDEX_MASK;
return 0;
}
static adv_error vgaline_mode_generate_graphics(vgaline_video_mode* mode, const adv_crtc* crtc, unsigned flags)
{
if (video_mode_generate_check("vgaline", vgaline_flags(), 2, 1024, crtc, flags)!=0)
return -1;
if (crtc->hde * crtc->vde > 64 * 1024) {
error_nolog_set("Mode to big for the VGA memory.\n");
return -1;
}
mode->is_text = 0;
mode->crtc = *crtc;
mode->font_x = 0;
mode->font_y = 0;
return 0;
}
adv_error fb_mode_generate(fb_video_mode* mode, const adv_crtc* crtc, unsigned flags)
{
assert(fb_is_active());
if (crtc_is_fake(crtc)) {
error_nolog_set("Not programmable modes are not supported.\n");
return -1;
}
if (video_mode_generate_check("fb", fb_flags(), 8, 2048, crtc, flags)!=0)
return -1;
mode->crtc = *crtc;
mode->index = flags & MODE_FLAGS_INDEX_MASK;
return 0;
}
