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-rw-r--r--UefiMonitorTest/UefiMonitorTest.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/UefiMonitorTest/UefiMonitorTest.c b/UefiMonitorTest/UefiMonitorTest.c
index 084a8b9..f84c00a 100644
--- a/UefiMonitorTest/UefiMonitorTest.c
+++ b/UefiMonitorTest/UefiMonitorTest.c
@@ -22,6 +22,51 @@ CONST EFI_PIXEL_BITMASK mBgrPixelMasks = {
STATIC
VOID
+ParseGraphicsPixelFormat (
+ IN CONST EFI_PIXEL_BITMASK *BitMask,
+ OUT UINT32 *PixelWidth,
+ OUT INT8 *PixelShl,
+ OUT INT8 *PixelShr
+ )
+{
+ UINT8 Index;
+ UINT32 *Masks;
+ UINT32 MergedMasks;
+
+ MergedMasks = 0;
+ Masks = (UINT32 *)BitMask;
+ for (Index = 0; Index < 3; Index++) {
+ ASSERT ((MergedMasks & Masks[Index]) == 0);
+
+ PixelShl[Index] = (INT8)HighBitSet32 (Masks[Index]) - 23 + (Index * 8);
+ if (PixelShl[Index] < 0) {
+ PixelShr[Index] = -PixelShl[Index];
+ PixelShl[Index] = 0;
+ } else {
+ PixelShr[Index] = 0;
+ }
+
+ DEBUG ((
+ DEBUG_INFO,
+ "Index %d: shl:%d shr:%d mask:%08x\n",
+ Index,
+ PixelShl[Index],
+ PixelShr[Index],
+ Masks[Index]
+ ));
+
+ MergedMasks = (UINT32)(MergedMasks | Masks[Index]);
+ }
+
+ MergedMasks = (UINT32)(MergedMasks | Masks[3]);
+
+ ASSERT (MergedMasks != 0);
+ *PixelWidth = (UINT32)((HighBitSet32 (MergedMasks) + 7) / 8);
+ DEBUG ((DEBUG_INFO, "Bytes per pixel: %d\n", *PixelWidth));
+}
+
+STATIC
+VOID
PrepareGraphicsInfo (
IN GRAPHICS_CONTEXT *Graphics,
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop