mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-26 16:47:40 +01:00
297 lines
9.7 KiB
C
297 lines
9.7 KiB
C
/*
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* libeg/load_bmp.c
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* Loading function for BMP images
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*
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* Copyright (c) 2006 Christoph Pfisterer
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the name of Christoph Pfisterer nor the names of the
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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//#include "libegint.h"
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#include "picopng.h"
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#define DBG(...)
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// BMP structures
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#pragma pack(1)
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typedef struct {
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UINT8 Blue;
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UINT8 Green;
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UINT8 Red;
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UINT8 Alpha;
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} BMP_COLOR_MAP;
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typedef struct {
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CHAR8 CharB;
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CHAR8 CharM;
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UINT32 Size;
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UINT16 Reserved[2];
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UINT32 ImageOffset;
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UINT32 HeaderSize;
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INT32 PixelWidth;
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INT32 PixelHeight;
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UINT16 Planes; // Must be 1
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UINT16 BitPerPixel; // 1, 4, 8, 24, or 32
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UINT32 CompressionType;
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UINT32 ImageSize; // Compressed image size in bytes
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UINT32 XPixelsPerMeter;
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UINT32 YPixelsPerMeter;
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UINT32 NumberOfColors;
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UINT32 ImportantColors;
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} BMP_IMAGE_HEADER;
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#pragma pack()
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//
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// Load BMP image
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//
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EG_IMAGE * egDecodeBMP(IN UINT8 *FileData, IN UINTN FileDataLength, IN BOOLEAN WantAlpha)
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{
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EG_IMAGE *NewImage;
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BMP_IMAGE_HEADER *BmpHeader;
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BMP_COLOR_MAP *BmpColorMap;
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INT32 x, y;
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INT32 RealPixelHeight, RealPixelWidth;
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UINT8 *ImagePtr;
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UINT8 *ImagePtrBase;
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UINTN ImageLineOffset;
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UINT8 ImageValue = 0;
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UINT8 AlphaValue;
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EFI_UGA_PIXEL *PixelPtr;
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UINTN Index, BitIndex;
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// read and check header
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if (FileDataLength < sizeof(BMP_IMAGE_HEADER) || FileData == NULL)
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return NULL;
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BmpHeader = (BMP_IMAGE_HEADER *) FileData;
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if (BmpHeader->CharB != 'B' || BmpHeader->CharM != 'M')
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return NULL;
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if (BmpHeader->BitPerPixel != 1 && BmpHeader->BitPerPixel != 4 &&
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BmpHeader->BitPerPixel != 8 && BmpHeader->BitPerPixel != 24 &&
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BmpHeader->BitPerPixel != 32)
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return NULL;
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// 32-bit images are always stored uncompressed
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if (BmpHeader->CompressionType > 0 && BmpHeader->BitPerPixel != 32)
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return NULL;
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// calculate parameters
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ImageLineOffset = BmpHeader->PixelWidth;
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if (BmpHeader->BitPerPixel == 32)
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ImageLineOffset *= 4;
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else if (BmpHeader->BitPerPixel == 24)
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ImageLineOffset *= 3;
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else if (BmpHeader->BitPerPixel == 1)
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ImageLineOffset = (ImageLineOffset + 7) >> 3;
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else if (BmpHeader->BitPerPixel == 4)
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ImageLineOffset = (ImageLineOffset + 1) >> 1;
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if ((ImageLineOffset % 4) != 0)
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ImageLineOffset = ImageLineOffset + (4 - (ImageLineOffset % 4));
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// check bounds
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RealPixelHeight = BmpHeader->PixelHeight > 0 ? BmpHeader->PixelHeight : -BmpHeader->PixelHeight;
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RealPixelWidth = BmpHeader->PixelWidth > 0 ? BmpHeader->PixelWidth : -BmpHeader->PixelWidth;
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if (BmpHeader->ImageOffset + ImageLineOffset * RealPixelHeight > FileDataLength)
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return NULL;
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// allocate image structure and buffer
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NewImage = egCreateImage(RealPixelWidth, RealPixelHeight, WantAlpha);
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if (NewImage == NULL)
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return NULL;
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AlphaValue = WantAlpha ? 255 : 0;
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// convert image
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BmpColorMap = (BMP_COLOR_MAP *)(FileData + sizeof(BMP_IMAGE_HEADER));
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ImagePtrBase = FileData + BmpHeader->ImageOffset;
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for (y = 0; y < RealPixelHeight; y++) {
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ImagePtr = ImagePtrBase;
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ImagePtrBase += ImageLineOffset;
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// vertically mirror
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if (BmpHeader->PixelHeight != RealPixelHeight) {
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PixelPtr = NewImage->PixelData + y * RealPixelWidth;
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} else {
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PixelPtr = NewImage->PixelData + (RealPixelHeight - 1 - y) * RealPixelWidth;
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}
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switch (BmpHeader->BitPerPixel) {
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case 1:
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for (x = 0; x < RealPixelWidth; x++) {
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BitIndex = x & 0x07;
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if (BitIndex == 0)
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ImageValue = *ImagePtr++;
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Index = (ImageValue >> (7 - BitIndex)) & 0x01;
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PixelPtr->Blue = BmpColorMap[Index].Blue;
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PixelPtr->Green = BmpColorMap[Index].Green;
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PixelPtr->Red = BmpColorMap[Index].Red;
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PixelPtr->Reserved = AlphaValue;
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PixelPtr++;
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}
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break;
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case 4:
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for (x = 0; x <= RealPixelWidth - 2; x += 2) {
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ImageValue = *ImagePtr++;
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Index = ImageValue >> 4;
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PixelPtr->Blue = BmpColorMap[Index].Blue;
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PixelPtr->Green = BmpColorMap[Index].Green;
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PixelPtr->Red = BmpColorMap[Index].Red;
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PixelPtr->Reserved = AlphaValue;
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PixelPtr++;
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Index = ImageValue & 0x0f;
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PixelPtr->Blue = BmpColorMap[Index].Blue;
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PixelPtr->Green = BmpColorMap[Index].Green;
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PixelPtr->Red = BmpColorMap[Index].Red;
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PixelPtr->Reserved = AlphaValue;
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PixelPtr++;
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}
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if (x < RealPixelWidth) {
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ImageValue = *ImagePtr++;
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Index = ImageValue >> 4;
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PixelPtr->Blue = BmpColorMap[Index].Blue;
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PixelPtr->Green = BmpColorMap[Index].Green;
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PixelPtr->Red = BmpColorMap[Index].Red;
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PixelPtr->Reserved = AlphaValue;
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PixelPtr++;
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}
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break;
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case 8:
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for (x = 0; x < RealPixelWidth; x++) {
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Index = *ImagePtr++;
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PixelPtr->Blue = BmpColorMap[Index].Blue;
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PixelPtr->Green = BmpColorMap[Index].Green;
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PixelPtr->Red = BmpColorMap[Index].Red;
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PixelPtr->Reserved = AlphaValue;
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PixelPtr++;
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}
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break;
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case 24:
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for (x = 0; x < RealPixelWidth; x++) {
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PixelPtr->Blue = *ImagePtr++;
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PixelPtr->Green = *ImagePtr++;
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PixelPtr->Red = *ImagePtr++;
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PixelPtr->Reserved = AlphaValue;
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PixelPtr++;
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}
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break;
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case 32:
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for (x = 0; x < RealPixelWidth; x++) {
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PixelPtr->Blue = *ImagePtr++;
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PixelPtr->Green = *ImagePtr++;
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PixelPtr->Red = *ImagePtr++;
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PixelPtr->Reserved = *ImagePtr++;
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if (!WantAlpha)
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PixelPtr->Reserved = 255 - PixelPtr->Reserved;
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PixelPtr++;
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}
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}
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}
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return NewImage;
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}
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//
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// Save BMP image
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//
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VOID egEncodeBMP(IN EG_IMAGE *Image, OUT UINT8 **FileDataReturn, OUT UINTN *FileDataLengthReturn)
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{
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BMP_IMAGE_HEADER *BmpHeader;
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UINT8 *FileData;
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UINT64 FileDataLength;
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UINT8 *ImagePtr;
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UINT8 *ImagePtrBase;
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UINT64 ImageLineOffset;
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EFI_UGA_PIXEL *PixelPtr;
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INT64 x, y;
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ImageLineOffset = MultU64x32(Image->Width, 3);
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// if ((ImageLineOffset % 4) != 0)
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// ImageLineOffset = ImageLineOffset + (4 - (ImageLineOffset % 4));
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if ((ImageLineOffset & 3) != 0) {
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ImageLineOffset = ImageLineOffset + (4 - (ImageLineOffset & 3));
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}
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// allocate buffer for file data
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FileDataLength = sizeof(BMP_IMAGE_HEADER) + MultU64x64(Image->Height, ImageLineOffset);
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FileData = AllocateZeroPool((UINTN)FileDataLength);
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if (FileData == NULL) {
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Print(L"Error allocate %d bytes\n", FileDataLength);
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*FileDataReturn = NULL;
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*FileDataLengthReturn = 0;
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return;
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}
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// fill header
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BmpHeader = (BMP_IMAGE_HEADER *)FileData;
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BmpHeader->CharB = 'B';
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BmpHeader->CharM = 'M';
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BmpHeader->Size = (UINT32)FileDataLength;
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BmpHeader->ImageOffset = sizeof(BMP_IMAGE_HEADER);
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BmpHeader->HeaderSize = 40;
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BmpHeader->PixelWidth = (UINT32)Image->Width;
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BmpHeader->PixelHeight = (UINT32)Image->Height;
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BmpHeader->Planes = 1;
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BmpHeader->BitPerPixel = 24;
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BmpHeader->CompressionType = 0;
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BmpHeader->XPixelsPerMeter = 0xb13;
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BmpHeader->YPixelsPerMeter = 0xb13;
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// fill pixel buffer
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ImagePtrBase = FileData + BmpHeader->ImageOffset;
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for (y = 0; y < Image->Height; y++) {
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ImagePtr = ImagePtrBase;
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ImagePtrBase += ImageLineOffset;
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// PixelPtr = Image->PixelData + (Image->Height - 1 - y) * Image->Width;
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PixelPtr = Image->PixelData + (INT32)(Image->Height - 1 - y) * (INT32)Image->Width;
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for (x = 0; x < Image->Width; x++) {
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*ImagePtr++ = PixelPtr->Blue;
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*ImagePtr++ = PixelPtr->Green;
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*ImagePtr++ = PixelPtr->Red;
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PixelPtr++;
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}
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}
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*FileDataReturn = FileData;
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*FileDataLengthReturn = (UINTN)FileDataLength;
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}
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/* EOF */
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