* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/*
+ * Modifications copyright (c) 2012 Roderick W. Smith
+ *
+ * Modifications distributed under the terms of the GNU General Public
+ * License (GPL) version 3 (GPLv3), a copy of which must be distributed
+ * with this source code or binaries made from it.
+ *
+ */
#include "libegint.h"
#include "../refind/screen.h"
#define LibLocateProtocol EfiLibLocateProtocol
#endif
-// Scan for at least this many text-mode and graphics-mode display modes, even
-// if the first modes are invalid. The number of text modes scanned must be at
-// least 3 on some computers to properly list all the available modes when the
-// user specifies an invalid value, since mode 1 (numbered from 0) is often
-// invalid, but mode 2 (the third one) is usually valid. AFAIK, gaps never
-// occur in graphics modes, although I've heard of one case that makes me think
-// some exceptions may occur.
-#define MIN_SCAN_TEXT_MODES 3
-#define MIN_SCAN_GRAPHICS_MODES 1
-
// Console defines and variables
static EFI_GUID ConsoleControlProtocolGuid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
// Screen handling
//
-VOID egInitScreen(VOID)
-{
+// Make the necessary system calls to identify the current graphics mode.
+// Stores the results in the file-global variables egScreenWidth,
+// egScreenHeight, and egHasGraphics. The first two of these will be
+// unchanged if neither GraphicsOutput nor UgaDraw is a valid pointer.
+static VOID egDetermineScreenSize(VOID) {
EFI_STATUS Status = EFI_SUCCESS;
UINT32 UGAWidth, UGAHeight, UGADepth, UGARefreshRate;
- // get protocols
- Status = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **) &ConsoleControl);
- if (EFI_ERROR(Status))
- ConsoleControl = NULL;
-
- Status = LibLocateProtocol(&UgaDrawProtocolGuid, (VOID **) &UgaDraw);
- if (EFI_ERROR(Status))
- UgaDraw = NULL;
-
- Status = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **) &GraphicsOutput);
- if (EFI_ERROR(Status))
- GraphicsOutput = NULL;
-
// get screen size
egHasGraphics = FALSE;
if (GraphicsOutput != NULL) {
egHasGraphics = TRUE;
}
}
+} // static VOID egDetermineScreenSize()
+
+VOID egGetScreenSize(OUT UINTN *ScreenWidth, OUT UINTN *ScreenHeight)
+{
+ egDetermineScreenSize();
+
+ if (ScreenWidth != NULL)
+ *ScreenWidth = egScreenWidth;
+ if (ScreenHeight != NULL)
+ *ScreenHeight = egScreenHeight;
+}
+
+VOID egInitScreen(VOID)
+{
+ EFI_STATUS Status = EFI_SUCCESS;
+
+ // get protocols
+ Status = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **) &ConsoleControl);
+ if (EFI_ERROR(Status))
+ ConsoleControl = NULL;
+
+ Status = LibLocateProtocol(&UgaDrawProtocolGuid, (VOID **) &UgaDraw);
+ if (EFI_ERROR(Status))
+ UgaDraw = NULL;
+
+ Status = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **) &GraphicsOutput);
+ if (EFI_ERROR(Status))
+ GraphicsOutput = NULL;
+
+ egDetermineScreenSize();
}
+// Convert a graphics mode (in *ModeWidth) to a width and height (returned in
+// *ModeWidth and *Height, respectively).
+// Returns TRUE if successful, FALSE if not (invalid mode, typically)
+BOOLEAN egGetResFromMode(UINTN *ModeWidth, UINTN *Height) {
+ UINTN Size;
+ EFI_STATUS Status;
+ EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info = NULL;
+
+ if ((ModeWidth != NULL) && (Height != NULL)) {
+ Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, *ModeWidth, &Size, &Info);
+ if ((Status == EFI_SUCCESS) && (Info != NULL)) {
+ *ModeWidth = Info->HorizontalResolution;
+ *Height = Info->VerticalResolution;
+ return TRUE;
+ }
+ }
+ return FALSE;
+} // BOOLEAN egGetResFromMode()
+
// 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
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 ModeNum = 0;
UINT32 UGAWidth, UGAHeight, UGADepth, UGARefreshRate;
+ BOOLEAN ModeSet = FALSE;
+
+ if ((ScreenWidth == NULL) || (ScreenHeight == NULL))
+ return FALSE;
if (GraphicsOutput != NULL) { // GOP mode (UEFI)
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) {
- Status = refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum);
- if (Status == EFI_SUCCESS) {
- ModeSet = TRUE;
- *ScreenWidth = Info->HorizontalResolution;
- *ScreenHeight = Info->VerticalResolution;
- }
+ if (egGetResFromMode(ScreenWidth, ScreenHeight) &&
+ (refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum) == EFI_SUCCESS)) {
+ ModeSet = TRUE;
}
- } else { // User specified width & height; must find mode
+
+ // User specified width & height; must find mode...
+ } else {
// Do a loop through the modes to see if the specified one is available;
// and if so, switch to it....
do {
Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
- if ((Status == EFI_SUCCESS) && (Size >= sizeof(*Info)) &&
+ if ((Status == EFI_SUCCESS) && (Size >= sizeof(*Info) && (Info != NULL)) &&
(Info->HorizontalResolution == *ScreenWidth) && (Info->VerticalResolution == *ScreenHeight)) {
Status = refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum);
ModeSet = (Status == EFI_SUCCESS);
} // if
- } while (((++ModeNum < MIN_SCAN_GRAPHICS_MODES) || (Status == EFI_SUCCESS)) && !ModeSet);
-// 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()
+ } while ((++ModeNum < GraphicsOutput->Mode->MaxMode) && !ModeSet);
} // if/else
if (ModeSet) {
if ((Status == EFI_SUCCESS) && (Info != NULL)) {
Print(L"Mode %d: %d x %d\n", ModeNum, Info->HorizontalResolution, Info->VerticalResolution);
} // else
- } while ((++ModeNum < MIN_SCAN_GRAPHICS_MODES) || (Status == EFI_SUCCESS));
-// Status = EFI_SUCCESS;
-// while (Status == EFI_SUCCESS) {
-// Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
-// if ((Status == EFI_SUCCESS) && (Size >= sizeof(*Info))) {
-// Print(L"Mode %d: %d x %d\n", ModeNum, Info->HorizontalResolution, Info->VerticalResolution);
-// } // else
-// ModeNum++;
-// } // while()
+ } while (++ModeNum < GraphicsOutput->Mode->MaxMode);
PauseForKey();
SwitchToGraphics();
- } // if()
+ } // if GOP mode (UEFI)
} else if (UgaDraw != NULL) { // UGA mode (EFI 1.x)
// Try to use current color depth & refresh rate for new mode. Maybe not the best choice
// This is just a placeholder until something better can be done....
Print(L"Error setting graphics mode %d x %d; unsupported mode!\n");
} // if/else
- } // if/else if
+ } // if/else if UGA mode (EFI 1.x)
return (ModeSet);
} // BOOLEAN egSetScreenSize()
-VOID egGetScreenSize(OUT UINTN *ScreenWidth, OUT UINTN *ScreenHeight)
-{
- if (ScreenWidth != NULL)
- *ScreenWidth = egScreenWidth;
- if (ScreenHeight != NULL)
- *ScreenHeight = egScreenHeight;
-}
-
-// Set a text mode
-// Returns the mode that was actually set.
-UINT32 egSetTextMode(UINT32 RequestedMode) {
+// Set a text mode.
+// Returns TRUE if the mode actually changed, FALSE otherwise.
+// Note that a FALSE return value can mean either an error or no change
+// necessary.
+BOOLEAN egSetTextMode(UINT32 RequestedMode) {
UINTN i = 0, Width, Height;
- UINT32 UsedMode = ST->ConOut->Mode->Mode;
EFI_STATUS Status;
+ BOOLEAN ChangedIt = FALSE;
- if (RequestedMode != ST->ConOut->Mode->Mode) {
+ if ((RequestedMode != DONT_CHANGE_TEXT_MODE) && (RequestedMode != ST->ConOut->Mode->Mode)) {
+// SwitchToGraphics();
Status = refit_call2_wrapper(ST->ConOut->SetMode, ST->ConOut, RequestedMode);
if (Status == EFI_SUCCESS) {
- UsedMode = RequestedMode;
+ ChangedIt = TRUE;
} else {
SwitchToText(FALSE);
- Print(L"Error setting text mode %d; available modes are:\n", RequestedMode);
+ Print(L"\nError 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)
- Print(L"Mode: %d: %d x %d\n", i, Width, Height);
- } while ((++i < MIN_SCAN_TEXT_MODES) || (Status == EFI_SUCCESS));
+ Print(L"Mode %d: %d x %d\n", i, Width, Height);
+ } while (++i < ST->ConOut->Mode->MaxMode);
+ Print(L"Mode %d: Use default mode\n", DONT_CHANGE_TEXT_MODE);
PauseForKey();
SwitchToGraphics();
} // if/else successful change
} // if need to change mode
- return UsedMode;
-} // UINT32 egSetTextMode()
+ return ChangedIt;
+} // BOOLEAN egSetTextMode()
CHAR16 * egScreenDescription(VOID)
{