}
}
-// Sets the screen resolution to the specified value, if possible.
-// If the specified value is not valid, displays a warning with the valid
-// modes on UEFI systems, or silently fails on EFI 1.x systems. Note that
-// this function attempts to set ANY screen resolution, even 0x0 or
-// ridiculously large values.
+// Sets the screen resolution to the specified value, if possible. If *ScreenHeight
+// is 0 and GOP mode is detected, assume that *ScreenWidth contains a GOP mode
+// number rather than a horizontal resolution. If the specified resolution is not
+// valid, displays a warning with the valid modes on GOP (UEFI) systems, or silently
+// fails on UGA (EFI 1.x) systems. Note that this function attempts to set ANY screen
+// resolution, even 0x0 or ridiculously large values.
+// Upon success, returns actual screen resolution in *ScreenWidth and *ScreenHeight.
+// These values are unchanged upon failure.
// Returns TRUE if successful, FALSE if not.
-BOOLEAN egSetScreenSize(IN UINTN ScreenWidth, IN UINTN ScreenHeight) {
- EFI_STATUS Status = EFI_SUCCESS;
- EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info;
- UINT32 ModeNum = 0;
- UINTN Size;
- BOOLEAN ModeSet = FALSE;
- UINT32 UGAWidth, UGAHeight, UGADepth, UGARefreshRate;
+BOOLEAN egSetScreenSize(IN OUT UINTN *ScreenWidth, IN OUT UINTN *ScreenHeight) {
+ EFI_STATUS Status = EFI_SUCCESS;
+ EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info;
+ UINT32 ModeNum = 0;
+ UINTN Size;
+ BOOLEAN ModeSet = FALSE;
+ UINT32 UGAWidth, UGAHeight, UGADepth, UGARefreshRate;
if (GraphicsOutput != NULL) { // GOP mode (UEFI)
- // Do a loop through the modes to see if the specified one is available;
- // and if so, switch to it....
- while ((Status == EFI_SUCCESS) && (!ModeSet)) {
+ if (*ScreenHeight == 0) { // User specified a mode number (stored in *ScreenWidth); use it directly
+ ModeNum = (UINT32) *ScreenWidth;
Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
- if ((Status == EFI_SUCCESS) && (Size >= sizeof(*Info)) &&
- (Info->HorizontalResolution == ScreenWidth) && (Info->VerticalResolution == ScreenHeight)) {
+ if (Status == EFI_SUCCESS) {
Status = refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum);
- ModeSet = (Status == EFI_SUCCESS);
- } // if
- ModeNum++;
- } // while()
+ if (Status == EFI_SUCCESS) {
+ ModeSet = TRUE;
+ *ScreenWidth = Info->HorizontalResolution;
+ *ScreenHeight = Info->VerticalResolution;
+ }
+ }
+ } else { // User specified width & height; must find mode
+ // Do a loop through the modes to see if the specified one is available;
+ // and if so, switch to it....
+ while ((Status == EFI_SUCCESS) && (!ModeSet)) {
+ Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
+ if ((Status == EFI_SUCCESS) && (Size >= sizeof(*Info)) &&
+ (Info->HorizontalResolution == *ScreenWidth) && (Info->VerticalResolution == *ScreenHeight)) {
+ Status = refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum);
+ ModeSet = (Status == EFI_SUCCESS);
+ } // if
+ ModeNum++;
+ } // while()
+ } // if/else
if (ModeSet) {
- egScreenWidth = ScreenWidth;
- egScreenHeight = ScreenHeight;
+ egScreenWidth = *ScreenWidth;
+ egScreenHeight = *ScreenHeight;
} else {// If unsuccessful, display an error message for the user....
SwitchToText(FALSE);
- Print(L"Error setting graphics mode %d x %d; using default mode!\nAvailable modes are:\n", ScreenWidth, ScreenHeight);
+ Print(L"Error setting graphics mode %d x %d; using default mode!\nAvailable modes are:\n", *ScreenWidth, *ScreenHeight);
ModeNum = 0;
do {
Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
- if (Status == EFI_SUCCESS) {
+ if ((Status == EFI_SUCCESS) && (Info != NULL)) {
Print(L"Mode %d: %d x %d\n", ModeNum, Info->HorizontalResolution, Info->VerticalResolution);
} // else
} while ((ModeNum++ < 10) || (Status == EFI_SUCCESS));
// Try to use current color depth & refresh rate for new mode. Maybe not the best choice
// in all cases, but I don't know how to probe for alternatives....
Status = refit_call5_wrapper(UgaDraw->GetMode, UgaDraw, &UGAWidth, &UGAHeight, &UGADepth, &UGARefreshRate);
- Status = refit_call5_wrapper(UgaDraw->SetMode, UgaDraw, ScreenWidth, ScreenHeight, UGADepth, UGARefreshRate);
+ Status = refit_call5_wrapper(UgaDraw->SetMode, UgaDraw, *ScreenWidth, *ScreenHeight, UGADepth, UGARefreshRate);
if (Status == EFI_SUCCESS) {
- egScreenWidth = ScreenWidth;
- egScreenHeight = ScreenHeight;
+ egScreenWidth = *ScreenWidth;
+ egScreenHeight = *ScreenHeight;
ModeSet = TRUE;
} else {
// TODO: Find a list of supported modes and display it.
UsedMode = RequestedMode;
} else {
SwitchToText(FALSE);
- Print(L"Error setting text mode %d; available modes are:\n", ST->ConOut->Mode->Mode);
+ Print(L"Error setting text mode %d; available modes are:\n", RequestedMode);
do {
Status = refit_call4_wrapper(ST->ConOut->QueryMode, ST->ConOut, i, &Width, &Height);
if (Status == EFI_SUCCESS)
#
#textmode 2
-# Set the screen's video resolution. Pass this option two values,
-# corresponding to the X and Y resolutions. Note that not all resolutions
-# are supported. On UEFI systems, passing an incorrect value results in a
-# message being shown on the screen to that effect, along with a list of
-# supported modes. On EFI 1.x systems (e.g., Macintoshes), setting an
-# incorrect mode silently fails. On both types of systems, setting an
-# incorrect resolution results in the default resolution being used.
-# A resolution of 1024x768 usually works, but higher values often don't.
+# Set the screen's video resolution. Pass this option either:
+# * two values, corresponding to the X and Y resolutions
+# * one value, corresponding to a GOP (UEFI) video mode
+# Note that not all resolutions are supported. On UEFI systems, passing
+# an incorrect value results in a message being shown on the screen to
+# that effect, along with a list of supported modes. On EFI 1.x systems
+# (e.g., Macintoshes), setting an incorrect mode silently fails. On both
+# types of systems, setting an incorrect resolution results in the default
+# resolution being used. A resolution of 1024x768 usually works, but higher
+# values often don't.
# Default is "0 0" (use the system default resolution, usually 800x600).
#
#resolution 1024 768
+#resolution 3
# Launch specified OSes in graphics mode. By default, rEFInd switches
# to text mode and displays basic pre-launch information when launching