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MdeModulePkg/FrameBufferBltLib: Use dynamic allocated line buffer

Browse Source 
https://bugzilla.tianocore.org/show_bug.cgi?id=339

The patch uses dynamic allocated line buffer to reduce memory usage
of frame buffer configure. (Original implementation uses 0x4000
bytes for line buffer.)

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Ruiyu Ni 2017-01-11 15:16:39 +08:00
parent 5af29d0d86
commit 1d71d0c777
1 changed files with 12 additions and 12 deletions

24
MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c

@ -26,12 +26,12 @@ struct FRAME_BUFFER_CONFIGURE {
UINTN BytesPerPixel;
UINTN WidthInPixels;
UINTN Height;
UINT8 LineBuffer[SIZE_4KB * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL)];
UINT8 *FrameBuffer;
EFI_GRAPHICS_PIXEL_FORMAT PixelFormat;
EFI_PIXEL_BITMASK PixelMasks;
INT8 PixelShl[4]; // R-G-B-Rsvd
INT8 PixelShr[4]; // R-G-B-Rsvd
UINT8 LineBuffer[0];
};
CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
@ -123,15 +123,6 @@ FrameBufferBltConfigure (
return RETURN_INVALID_PARAMETER;
}
if (*ConfigureSize < sizeof (FRAME_BUFFER_CONFIGURE)) {
*ConfigureSize = sizeof (FRAME_BUFFER_CONFIGURE);
return RETURN_BUFFER_TOO_SMALL;
}
if (Configure == NULL) {
return RETURN_INVALID_PARAMETER;
}
switch (FrameBufferInfo->PixelFormat) {
case PixelRedGreenBlueReserved8BitPerColor:
BitMask = &mRgbPixelMasks;
@ -156,6 +147,17 @@ FrameBufferBltConfigure (
FrameBufferBltLibConfigurePixelFormat (BitMask, &BytesPerPixel, PixelShl, PixelShr);
if (*ConfigureSize < sizeof (FRAME_BUFFER_CONFIGURE)
+ FrameBufferInfo->HorizontalResolution * BytesPerPixel) {
*ConfigureSize = sizeof (FRAME_BUFFER_CONFIGURE)
+ FrameBufferInfo->HorizontalResolution * BytesPerPixel;
return RETURN_BUFFER_TOO_SMALL;
}
if (Configure == NULL) {
return RETURN_INVALID_PARAMETER;
}
CopyMem (&Configure->PixelMasks, BitMask, sizeof (*BitMask));
CopyMem (Configure->PixelShl, PixelShl, sizeof (PixelShl));
CopyMem (Configure->PixelShr, PixelShr, sizeof (PixelShr));
@ -166,8 +168,6 @@ FrameBufferBltConfigure (
Configure->Height = (UINTN) FrameBufferInfo->VerticalResolution;
Configure->WidthInBytes = Configure->WidthInPixels * Configure->BytesPerPixel;
ASSERT (Configure->WidthInBytes < sizeof (Configure->LineBuffer));
return RETURN_SUCCESS;
}