-/**\r
- Convert a *.BMP graphics image to a GOP blt buffer. If a NULL Blt buffer\r
- is passed in a GopBlt buffer will be allocated by this routine. If a GopBlt\r
- buffer is passed in it will be used if it is big enough.\r
-\r
- Caution: This function may receive untrusted input.\r
-\r
- @param[in] BmpImage Pointer to BMP file\r
- @param[in] BmpImageSize Number of bytes in BmpImage\r
- @param[in, out] GopBlt Buffer containing GOP version of BmpImage.\r
- @param[in, out] GopBltSize Size of GopBlt in bytes.\r
- @param[out] PixelHeight Height of GopBlt/BmpImage in pixels\r
- @param[out] PixelWidth Width of GopBlt/BmpImage in pixels\r
-\r
- @retval EFI_SUCCESS GopBlt and GopBltSize are returned.\r
- @retval EFI_UNSUPPORTED BmpImage is not a valid *.BMP image\r
- @retval EFI_BUFFER_TOO_SMALL The passed in GopBlt buffer is not big enough.\r
- GopBltSize will contain the required size.\r
- @retval EFI_OUT_OF_RESOURCES No enough buffer to allocate.\r
-\r
-**/\r
-STATIC\r
-EFI_STATUS\r
-ConvertBmpToGopBlt (\r
- IN VOID *BmpImage,\r
- IN UINTN BmpImageSize,\r
- IN OUT VOID **GopBlt,\r
- IN OUT UINTN *GopBltSize,\r
- OUT UINTN *PixelHeight,\r
- OUT UINTN *PixelWidth\r
- )\r
-{\r
- UINT8 *Image;\r
- UINT8 *ImageHeader;\r
- BMP_IMAGE_HEADER *BmpHeader;\r
- BMP_COLOR_MAP *BmpColorMap;\r
- EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer;\r
- EFI_GRAPHICS_OUTPUT_BLT_PIXEL *Blt;\r
- UINT64 BltBufferSize;\r
- UINTN Index;\r
- UINTN Height;\r
- UINTN Width;\r
- UINTN ImageIndex;\r
- UINT32 DataSizePerLine;\r
- BOOLEAN IsAllocated;\r
- UINT32 ColorMapNum;\r
-\r
- if (sizeof (BMP_IMAGE_HEADER) > BmpImageSize) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- BmpHeader = (BMP_IMAGE_HEADER *) BmpImage;\r
-\r
- if (BmpHeader->CharB != 'B' || BmpHeader->CharM != 'M') {\r
- return EFI_UNSUPPORTED;\r
- }\r
-\r
- //\r
- // Doesn't support compress.\r
- //\r
- if (BmpHeader->CompressionType != 0) {\r
- return EFI_UNSUPPORTED;\r
- }\r
-\r
- //\r
- // Only support BITMAPINFOHEADER format.\r
- // BITMAPFILEHEADER + BITMAPINFOHEADER = BMP_IMAGE_HEADER\r
- //\r
- if (BmpHeader->HeaderSize != sizeof (BMP_IMAGE_HEADER) - OFFSET_OF(BMP_IMAGE_HEADER, HeaderSize)) {\r
- return EFI_UNSUPPORTED;\r
- }\r
-\r
- //\r
- // The data size in each line must be 4 byte alignment.\r
- //\r
- DataSizePerLine = ((BmpHeader->PixelWidth * BmpHeader->BitPerPixel + 31) >> 3) & (~0x3);\r
- BltBufferSize = MultU64x32 (DataSizePerLine, BmpHeader->PixelHeight);\r
- if (BltBufferSize > (UINT32) ~0) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if ((BmpHeader->Size != BmpImageSize) ||\r
- (BmpHeader->Size < BmpHeader->ImageOffset) ||\r
- (BmpHeader->Size - BmpHeader->ImageOffset != BmpHeader->PixelHeight * DataSizePerLine)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- //\r
- // Calculate Color Map offset in the image.\r
- //\r
- Image = BmpImage;\r
- BmpColorMap = (BMP_COLOR_MAP *) (Image + sizeof (BMP_IMAGE_HEADER));\r
- if (BmpHeader->ImageOffset < sizeof (BMP_IMAGE_HEADER)) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
-\r
- if (BmpHeader->ImageOffset > sizeof (BMP_IMAGE_HEADER)) {\r
- switch (BmpHeader->BitPerPixel) {\r
- case 1:\r
- ColorMapNum = 2;\r
- break;\r
- case 4:\r
- ColorMapNum = 16;\r
- break;\r
- case 8:\r
- ColorMapNum = 256;\r
- break;\r
- default:\r
- ColorMapNum = 0;\r
- break;\r
- }\r
- //\r
- // BMP file may has padding data between the bmp header section and the bmp data section.\r
- //\r
- if (BmpHeader->ImageOffset - sizeof (BMP_IMAGE_HEADER) < sizeof (BMP_COLOR_MAP) * ColorMapNum) {\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- }\r
-\r
- //\r
- // Calculate graphics image data address in the image\r
- //\r
- Image = ((UINT8 *) BmpImage) + BmpHeader->ImageOffset;\r
- ImageHeader = Image;\r
-\r
- //\r
- // Calculate the BltBuffer needed size.\r
- //\r
- BltBufferSize = MultU64x32 ((UINT64) BmpHeader->PixelWidth, BmpHeader->PixelHeight);\r
- //\r
- // Ensure the BltBufferSize * sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL) doesn't overflow\r
- //\r
- if (BltBufferSize > DivU64x32 ((UINTN) ~0, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL))) {\r
- return EFI_UNSUPPORTED;\r
- }\r
- BltBufferSize = MultU64x32 (BltBufferSize, sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL));\r
-\r
- IsAllocated = FALSE;\r
- if (*GopBlt == NULL) {\r
- //\r
- // GopBlt is not allocated by caller.\r
- //\r
- *GopBltSize = (UINTN) BltBufferSize;\r
- *GopBlt = AllocatePool (*GopBltSize);\r
- IsAllocated = TRUE;\r
- if (*GopBlt == NULL) {\r
- return EFI_OUT_OF_RESOURCES;\r
- }\r
- } else {\r
- //\r
- // GopBlt has been allocated by caller.\r
- //\r
- if (*GopBltSize < (UINTN) BltBufferSize) {\r
- *GopBltSize = (UINTN) BltBufferSize;\r
- return EFI_BUFFER_TOO_SMALL;\r
- }\r
- }\r
-\r
- *PixelWidth = BmpHeader->PixelWidth;\r
- *PixelHeight = BmpHeader->PixelHeight;\r
-\r
- //\r
- // Convert image from BMP to Blt buffer format\r
- //\r
- BltBuffer = *GopBlt;\r
- for (Height = 0; Height < BmpHeader->PixelHeight; Height++) {\r
- Blt = &BltBuffer[(BmpHeader->PixelHeight - Height - 1) * BmpHeader->PixelWidth];\r
- for (Width = 0; Width < BmpHeader->PixelWidth; Width++, Image++, Blt++) {\r
- switch (BmpHeader->BitPerPixel) {\r
- case 1:\r
- //\r
- // Convert 1-bit (2 colors) BMP to 24-bit color\r
- //\r
- for (Index = 0; Index < 8 && Width < BmpHeader->PixelWidth; Index++) {\r
- Blt->Red = BmpColorMap[((*Image) >> (7 - Index)) & 0x1].Red;\r
- Blt->Green = BmpColorMap[((*Image) >> (7 - Index)) & 0x1].Green;\r
- Blt->Blue = BmpColorMap[((*Image) >> (7 - Index)) & 0x1].Blue;\r
- Blt++;\r
- Width++;\r
- }\r
-\r
- Blt--;\r
- Width--;\r
- break;\r
-\r
- case 4:\r
- //\r
- // Convert 4-bit (16 colors) BMP Palette to 24-bit color\r
- //\r
- Index = (*Image) >> 4;\r
- Blt->Red = BmpColorMap[Index].Red;\r
- Blt->Green = BmpColorMap[Index].Green;\r
- Blt->Blue = BmpColorMap[Index].Blue;\r
- if (Width < (BmpHeader->PixelWidth - 1)) {\r
- Blt++;\r
- Width++;\r
- Index = (*Image) & 0x0f;\r
- Blt->Red = BmpColorMap[Index].Red;\r
- Blt->Green = BmpColorMap[Index].Green;\r
- Blt->Blue = BmpColorMap[Index].Blue;\r
- }\r
- break;\r
-\r
- case 8:\r
- //\r
- // Convert 8-bit (256 colors) BMP Palette to 24-bit color\r
- //\r
- Blt->Red = BmpColorMap[*Image].Red;\r
- Blt->Green = BmpColorMap[*Image].Green;\r
- Blt->Blue = BmpColorMap[*Image].Blue;\r
- break;\r
-\r
- case 24:\r
- //\r
- // It is 24-bit BMP.\r
- //\r
- Blt->Blue = *Image++;\r
- Blt->Green = *Image++;\r
- Blt->Red = *Image;\r
- break;\r
-\r
- case 32:\r
- //\r
- // it is 32-bit BMP. Skip pixel's highest byte\r
- //\r
- Blt->Blue = *Image++;\r
- Blt->Green = *Image++;\r
- Blt->Red = *Image++;\r
- break;\r
-\r
- default:\r
- //\r
- // Other bit format BMP is not supported.\r
- //\r
- if (IsAllocated) {\r
- FreePool (*GopBlt);\r
- *GopBlt = NULL;\r
- }\r
- return EFI_UNSUPPORTED;\r
- };\r
-\r
- }\r
-\r
- ImageIndex = (UINTN) Image - (UINTN) ImageHeader;\r
- if ((ImageIndex % 4) != 0) {\r
- //\r
- // Bmp Image starts each row on a 32-bit boundary!\r
- //\r
- Image = Image + (4 - (ImageIndex % 4));\r
- }\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-\r