VOID egDrawImageArea(IN EG_IMAGE *Image,
IN UINTN AreaPosX, IN UINTN AreaPosY,
IN UINTN AreaWidth, IN UINTN AreaHeight,
IN UINTN ScreenPosX, IN UINTN ScreenPosY)
{
if (!egHasGraphics)
return;
egRestrictImageArea(Image, AreaPosX, AreaPosY, &AreaWidth, &AreaHeight);
if (AreaWidth == 0)
return;
if (Image->HasAlpha) {
Image->HasAlpha = FALSE;
egSetPlane(PLPTR(Image, a), 0, Image->Width * Image->Height);
}
if (GraphicsOutput != NULL) {
GraphicsOutput->Blt(GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)Image->PixelData, EfiBltBufferToVideo,
AreaPosX, AreaPosY, ScreenPosX, ScreenPosY, AreaWidth, AreaHeight, Image->Width * 4);
} else if (UgaDraw != NULL) {
UgaDraw->Blt(UgaDraw, (EFI_UGA_PIXEL *)Image->PixelData, EfiUgaBltBufferToVideo,
AreaPosX, AreaPosY, ScreenPosX, ScreenPosY, AreaWidth, AreaHeight, Image->Width * 4);
}
}
VOID egDrawImage(IN EG_IMAGE *Image, IN UINTN ScreenPosX, IN UINTN ScreenPosY)
{
if (!egHasGraphics)
return;
if (Image->HasAlpha) {
Image->HasAlpha = FALSE;
egSetPlane(PLPTR(Image, a), 0, Image->Width * Image->Height);
}
if (GraphicsOutput != NULL) {
refit_call10_wrapper(GraphicsOutput->Blt, GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)Image->PixelData, EfiBltBufferToVideo,
0, 0, ScreenPosX, ScreenPosY, Image->Width, Image->Height, 0);
} else if (UgaDraw != NULL) {
refit_call10_wrapper(UgaDraw->Blt, UgaDraw, (EFI_UGA_PIXEL *)Image->PixelData, EfiUgaBltBufferToVideo,
0, 0, ScreenPosX, ScreenPosY, Image->Width, Image->Height, 0);
}
}
EG_IMAGE * egDecodeICNS(IN UINT8 *FileData, IN UINTN FileDataLength, IN UINTN IconSize, IN BOOLEAN WantAlpha)
{
EG_IMAGE *NewImage;
UINT8 *Ptr, *BufferEnd, *DataPtr, *MaskPtr;
UINT32 BlockLen, DataLen, MaskLen;
UINTN FetchPixelSize, PixelCount, i;
UINT8 *CompData;
UINTN CompLen;
UINT8 *SrcPtr;
EG_PIXEL *DestPtr;
if (FileDataLength < 8 || FileData == NULL ||
FileData[0] != 'i' || FileData[1] != 'c' || FileData[2] != 'n' || FileData[3] != 's') {
// not an icns file...
return NULL;
}
FetchPixelSize = IconSize;
for (;;) {
DataPtr = NULL;
DataLen = 0;
MaskPtr = NULL;
MaskLen = 0;
Ptr = FileData + 8;
BufferEnd = FileData + FileDataLength;
// iterate over tagged blocks in the file
while (Ptr + 8 <= BufferEnd) {
BlockLen = ((UINT32)Ptr[4] << 24) + ((UINT32)Ptr[5] << 16) + ((UINT32)Ptr[6] << 8) + (UINT32)Ptr[7];
if (Ptr + BlockLen > BufferEnd) // block continues beyond end of file
break;
// extract the appropriate blocks for each pixel size
if (FetchPixelSize == 128) {
if (Ptr[0] == 'i' && Ptr[1] == 't' && Ptr[2] == '3' && Ptr[3] == '2') {
if (Ptr[8] == 0 && Ptr[9] == 0 && Ptr[10] == 0 && Ptr[11] == 0) {
DataPtr = Ptr + 12;
DataLen = BlockLen - 12;
}
} else if (Ptr[0] == 't' && Ptr[1] == '8' && Ptr[2] == 'm' && Ptr[3] == 'k') {
MaskPtr = Ptr + 8;
MaskLen = BlockLen - 8;
}
} else if (FetchPixelSize == 48) {
if (Ptr[0] == 'i' && Ptr[1] == 'h' && Ptr[2] == '3' && Ptr[3] == '2') {
DataPtr = Ptr + 8;
DataLen = BlockLen - 8;
} else if (Ptr[0] == 'h' && Ptr[1] == '8' && Ptr[2] == 'm' && Ptr[3] == 'k') {
MaskPtr = Ptr + 8;
MaskLen = BlockLen - 8;
}
} else if (FetchPixelSize == 32) {
if (Ptr[0] == 'i' && Ptr[1] == 'l' && Ptr[2] == '3' && Ptr[3] == '2') {
DataPtr = Ptr + 8;
DataLen = BlockLen - 8;
} else if (Ptr[0] == 'l' && Ptr[1] == '8' && Ptr[2] == 'm' && Ptr[3] == 'k') {
MaskPtr = Ptr + 8;
MaskLen = BlockLen - 8;
}
} else if (FetchPixelSize == 16) {
if (Ptr[0] == 'i' && Ptr[1] == 's' && Ptr[2] == '3' && Ptr[3] == '2') {
DataPtr = Ptr + 8;
DataLen = BlockLen - 8;
} else if (Ptr[0] == 's' && Ptr[1] == '8' && Ptr[2] == 'm' && Ptr[3] == 'k') {
MaskPtr = Ptr + 8;
MaskLen = BlockLen - 8;
}
}
Ptr += BlockLen;
}
//TODO - take different larger size if not found
/* FUTURE: try to load a different size and scale it later
if (DataPtr == NULL && FetchPixelSize == 32) {
FetchPixelSize = 128;
continue;
}
*/
break;
}
if (DataPtr == NULL)
return NULL; // no image found
// allocate image structure and buffer
NewImage = egCreateImage(FetchPixelSize, FetchPixelSize, WantAlpha);
if (NewImage == NULL)
return NULL;
PixelCount = FetchPixelSize * FetchPixelSize;
if (DataLen < PixelCount * 3) {
// pixel data is compressed, RGB planar
CompData = DataPtr;
CompLen = DataLen;
egDecompressIcnsRLE(&CompData, &CompLen, PLPTR(NewImage, r), PixelCount);
egDecompressIcnsRLE(&CompData, &CompLen, PLPTR(NewImage, g), PixelCount);
egDecompressIcnsRLE(&CompData, &CompLen, PLPTR(NewImage, b), PixelCount);
// possible assertion: CompLen == 0
if (CompLen > 0) {
Print(L" egLoadICNSIcon: %d bytes of compressed data left\n", CompLen);
}
} else {
// pixel data is uncompressed, RGB interleaved
SrcPtr = DataPtr;
DestPtr = NewImage->PixelData;
for (i = 0; i < PixelCount; i++, DestPtr++) {
DestPtr->r = *SrcPtr++;
DestPtr->g = *SrcPtr++;
DestPtr->b = *SrcPtr++;
}
}
// add/set alpha plane
if (MaskPtr != NULL && MaskLen >= PixelCount && WantAlpha)
egInsertPlane(MaskPtr, PLPTR(NewImage, a), PixelCount);
else
egSetPlane(PLPTR(NewImage, a), WantAlpha ? 255 : 0, PixelCount);
// FUTURE: scale to originally requested size if we had to load another size
return NewImage;
}