MdeModulePkg/FrameBufferBltLib: Use dynamic allocated line buffer

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>

1 files changed, 12 insertions, 12 deletions

diff --git a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
index 5f6eddc..011d9c5 100644
--- a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
+++ b/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;

 }