Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

The boot loader (BIOS IA32 only) now chooses the default video mode by looking at the

Browse Source 
EDID info from the monitor if available through VESA/DDC.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19588 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2006-12-21 14:20:17 +00:00
parent bdb64116e9
commit d2de13bdd4
1 changed files with 56 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
src/system/boot/platform/bios_ia32/video.cpp
View File

@ -88,6 +88,27 @@ add_video_mode(video_mode *videoMode)
}
//! Finds a video mode with the given resolution, prefers 16 bit modes
static video_mode *
find_video_mode(int32 width, int32 height)
{
video_mode *found = NULL;
video_mode *mode = NULL;
while ((mode = (video_mode *)list_get_next_item(&sModeList, mode)) != NULL) {
if (mode->width == width && mode->height == height) {
// prefer 16 bit mode
if (mode->bits_per_pixel == 16)
return mode;
if (found == NULL || found->bits_per_pixel < mode->bits_per_pixel)
found = mode;
}
}
return found;
}
static video_mode *
find_video_mode(int32 width, int32 height, int32 depth)
{
@ -792,13 +813,45 @@ platform_init_video(void)
return B_ERROR;
}
sMode = sDefaultMode;
TRACE(("VESA compatible graphics!\n"));
edid1_info info;
vesa_get_edid(&info);
if (vesa_get_edid(&info) == B_OK) {
// we got EDID information from the monitor, try to find a new default mode
video_mode *defaultMode = NULL;
// try detailed timing first
for (int32 i = 0; i < EDID1_NUM_DETAILED_MONITOR_DESC; i++) {
edid1_detailed_monitor &monitor = info.detailed_monitor[i];
if (monitor.monitor_desc_type == edid1_is_detailed_timing) {
defaultMode = find_video_mode(monitor.data.detailed_timing.h_active,
monitor.data.detailed_timing.v_active);
if (defaultMode != NULL)
break;
}
}
if (defaultMode == NULL) {
// try standard timings next
for (int32 i = 0; i < EDID1_NUM_STD_TIMING; i++) {
if (info.std_timing[i].h_size <= 256)
continue;
defaultMode = find_video_mode(info.std_timing[i].h_size,
info.std_timing[i].v_size);
if (defaultMode != NULL)
break;
}
}
if (defaultMode != NULL) {
// We found a new default mode to use!
sDefaultMode = defaultMode;
}
}
sMode = sDefaultMode;
return B_OK;
}