* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/*
+ * Modifications copyright (c) 2012-2015 Roderick W. Smith
+ *
+ * Modifications distributed under the terms of the GNU General Public
+ * License (GPL) version 3 (GPLv3), or (at your option) any later version.
+ *
+ */
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
#include "libegint.h"
#include "../refind/global.h"
#include "../refind/lib.h"
#include "../refind/screen.h"
#include "../include/refit_call_wrapper.h"
+#include "lodepng.h"
#define MAX_FILE_SIZE (1024*1024*1024)
+// Multiplier for pseudo-floating-point operations in egScaleImage().
+// A value of 4096 should keep us within limits 32-bit systems, but I've seen
+// some minor artifacts at this level, so give it a bit more precision on
+// 64-bit systems....
+#if defined(EFIX64)
+#define FP_MULTIPLIER 32768
+#else
+#define FP_MULTIPLIER 4096
+#endif
+
#ifndef __MAKEWITH_GNUEFI
#define LibLocateHandle gBS->LocateHandleBuffer
#define LibOpenRoot EfiLibOpenRoot
return NULL;
NewImage->PixelData = (EG_PIXEL *) AllocatePool(Width * Height * sizeof(EG_PIXEL));
if (NewImage->PixelData == NULL) {
- FreePool(NewImage);
+ egFreeImage(NewImage);
return NULL;
}
EG_IMAGE * egCopyImage(IN EG_IMAGE *Image)
{
- EG_IMAGE *NewImage;
+ EG_IMAGE *NewImage = NULL;
- NewImage = egCreateImage(Image->Width, Image->Height, Image->HasAlpha);
+ if (Image != NULL)
+ NewImage = egCreateImage(Image->Width, Image->Height, Image->HasAlpha);
if (NewImage == NULL)
return NULL;
return NewImage;
}
+// Returns a smaller image composed of the specified crop area from the larger area.
+// If the specified area is larger than is in the original, returns NULL.
+EG_IMAGE * egCropImage(IN EG_IMAGE *Image, IN UINTN StartX, IN UINTN StartY, IN UINTN Width, IN UINTN Height) {
+ EG_IMAGE *NewImage = NULL;
+ UINTN x, y;
+
+ if (((StartX + Width) > Image->Width) || ((StartY + Height) > Image->Height))
+ return NULL;
+
+ NewImage = egCreateImage(Width, Height, Image->HasAlpha);
+ if (NewImage == NULL)
+ return NULL;
+
+ for (y = 0; y < Height; y++) {
+ for (x = 0; x < Width; x++) {
+ NewImage->PixelData[y * NewImage->Width + x] = Image->PixelData[(y + StartY) * Image->Width + x + StartX];
+ }
+ }
+ return NewImage;
+} // EG_IMAGE * egCropImage()
+
+// The following function implements a bilinear image scaling algorithm, based on
+// code presented at http://tech-algorithm.com/articles/bilinear-image-scaling/.
+// Resize an image; returns pointer to resized image if successful, NULL otherwise.
+// Calling function is responsible for freeing allocated memory.
+// NOTE: x_ratio, y_ratio, x_diff, and y_diff should really be float values;
+// however, I've found that my 32-bit Mac Mini has a buggy EFI (or buggy CPU?), which
+// causes this function to hang on float-to-UINT8 conversions on some (but not all!)
+// float values. Therefore, this function uses integer arithmetic but multiplies
+// all values by FP_MULTIPLIER to achieve something resembling the sort of precision
+// needed for good results.
+EG_IMAGE * egScaleImage(IN EG_IMAGE *Image, IN UINTN NewWidth, IN UINTN NewHeight) {
+ EG_IMAGE *NewImage = NULL;
+ EG_PIXEL a, b, c, d;
+ UINTN x, y, Index ;
+ UINTN i, j;
+ UINTN Offset = 0;
+ UINTN x_ratio, y_ratio, x_diff, y_diff;
+
+ if ((Image == NULL) || (Image->Height == 0) || (Image->Width == 0) || (NewWidth == 0) || (NewHeight == 0))
+ return NULL;
+
+ if ((Image->Width == NewWidth) && (Image->Height == NewHeight))
+ return (egCopyImage(Image));
+
+ NewImage = egCreateImage(NewWidth, NewHeight, Image->HasAlpha);
+ if (NewImage == NULL)
+ return NULL;
+
+ x_ratio = ((Image->Width - 1) * FP_MULTIPLIER) / NewWidth;
+ y_ratio = ((Image->Height - 1) * FP_MULTIPLIER) / NewHeight;
+
+ for (i = 0; i < NewHeight; i++) {
+ for (j = 0; j < NewWidth; j++) {
+ x = (j * (Image->Width - 1)) / NewWidth;
+ y = (i * (Image->Height - 1)) / NewHeight;
+ x_diff = (x_ratio * j) - x * FP_MULTIPLIER;
+ y_diff = (y_ratio * i) - y * FP_MULTIPLIER;
+ Index = ((y * Image->Width) + x);
+ a = Image->PixelData[Index];
+ b = Image->PixelData[Index + 1];
+ c = Image->PixelData[Index + Image->Width];
+ d = Image->PixelData[Index + Image->Width + 1];
+
+ // blue element
+ NewImage->PixelData[Offset].b = ((a.b) * (FP_MULTIPLIER - x_diff) * (FP_MULTIPLIER - y_diff) +
+ (b.b) * (x_diff) * (FP_MULTIPLIER - y_diff) +
+ (c.b) * (y_diff) * (FP_MULTIPLIER - x_diff) +
+ (d.b) * (x_diff * y_diff)) / (FP_MULTIPLIER * FP_MULTIPLIER);
+
+ // green element
+ NewImage->PixelData[Offset].g = ((a.g) * (FP_MULTIPLIER - x_diff) * (FP_MULTIPLIER - y_diff) +
+ (b.g) * (x_diff) * (FP_MULTIPLIER - y_diff) +
+ (c.g) * (y_diff) * (FP_MULTIPLIER - x_diff) +
+ (d.g) * (x_diff * y_diff)) / (FP_MULTIPLIER * FP_MULTIPLIER);
+
+ // red element
+ NewImage->PixelData[Offset].r = ((a.r) * (FP_MULTIPLIER - x_diff) * (FP_MULTIPLIER - y_diff) +
+ (b.r) * (x_diff) * (FP_MULTIPLIER - y_diff) +
+ (c.r) * (y_diff) * (FP_MULTIPLIER - x_diff) +
+ (d.r) * (x_diff * y_diff)) / (FP_MULTIPLIER * FP_MULTIPLIER);
+
+ // alpha element
+ NewImage->PixelData[Offset++].a = ((a.a) * (FP_MULTIPLIER - x_diff) * (FP_MULTIPLIER - y_diff) +
+ (b.a) * (x_diff) * (FP_MULTIPLIER - y_diff) +
+ (c.a) * (y_diff) * (FP_MULTIPLIER - x_diff) +
+ (d.a) * (x_diff * y_diff)) / (FP_MULTIPLIER * FP_MULTIPLIER);
+ } // for (j...)
+ } // for (i...)
+ return NewImage;
+} // EG_IMAGE * egScaleImage()
+
VOID egFreeImage(IN EG_IMAGE *Image)
{
if (Image != NULL) {
// Basic file operations
//
-EFI_STATUS egLoadFile(IN EFI_FILE* BaseDir, IN CHAR16 *FileName,
- OUT UINT8 **FileData, OUT UINTN *FileDataLength)
+EFI_STATUS egLoadFile(IN EFI_FILE *BaseDir, IN CHAR16 *FileName, OUT UINT8 **FileData, OUT UINTN *FileDataLength)
{
EFI_STATUS Status;
EFI_FILE_HANDLE FileHandle;
UINTN BufferSize;
UINT8 *Buffer;
+ if ((BaseDir == NULL) || (FileName == NULL))
+ return EFI_NOT_FOUND;
+
Status = refit_call5_wrapper(BaseDir->Open, BaseDir, &FileHandle, FileName, EFI_FILE_MODE_READ, 0);
if (EFI_ERROR(Status)) {
return Status;
static EFI_GUID ESPGuid = { 0xc12a7328, 0xf81f, 0x11d2, { 0xba, 0x4b, 0x00, 0xa0, 0xc9, 0x3e, 0xc9, 0x3b } };
-static EFI_STATUS egFindESP(OUT EFI_FILE_HANDLE *RootDir)
+EFI_STATUS egFindESP(OUT EFI_FILE_HANDLE *RootDir)
{
EFI_STATUS Status;
UINTN HandleCount = 0;
}
Status = refit_call5_wrapper(BaseDir->Open, BaseDir, &FileHandle, FileName,
- EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE, 0);
+ EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE, 0);
if (EFI_ERROR(Status))
return Status;
// Loading images from files and embedded data
//
-static CHAR16 * egFindExtension(IN CHAR16 *FileName)
-{
- UINTN i;
-
- for (i = StrLen(FileName); i >= 0; i--) {
- if (FileName[i] == '.')
- return FileName + i + 1;
- if (FileName[i] == '/' || FileName[i] == '\\')
- break;
- }
- return FileName + StrLen(FileName);
-}
-
-static EG_IMAGE * egDecodeAny(IN UINT8 *FileData, IN UINTN FileDataLength,
- IN CHAR16 *Format, IN UINTN IconSize, IN BOOLEAN WantAlpha)
+// Decode the specified image data. The IconSize parameter is relevant only
+// for ICNS, for which it selects which ICNS sub-image is decoded.
+// Returns a pointer to the resulting EG_IMAGE or NULL if decoding failed.
+static EG_IMAGE * egDecodeAny(IN UINT8 *FileData, IN UINTN FileDataLength, IN UINTN IconSize, IN BOOLEAN WantAlpha)
{
EG_IMAGE *NewImage = NULL;
- // Note: The UEFI implementation in Gigabyte's Hybrid EFI is buggy and does
- // a case-sensitive comparison in StriCmp rather than the case-insensitive
- // comparison that the spec says should be done. As a workaround, we repeat
- // the comparison twice here.
- // dispatch by extension
- if ((StriCmp(Format, L"BMP") == 0) || (StriCmp(Format, L"bmp") == 0)) {
+ NewImage = egDecodeICNS(FileData, FileDataLength, IconSize, WantAlpha);
+ if (NewImage == NULL)
+ NewImage = egDecodePNG(FileData, FileDataLength, IconSize, WantAlpha);
+ if (NewImage == NULL)
NewImage = egDecodeBMP(FileData, FileDataLength, IconSize, WantAlpha);
- } else if ((StriCmp(Format, L"ICNS") == 0) || (StriCmp(Format, L"icns") == 0)) {
- NewImage = egDecodeICNS(FileData, FileDataLength, IconSize, WantAlpha);
- } // if/else
return NewImage;
}
return NULL;
// decode it
- NewImage = egDecodeAny(FileData, FileDataLength, egFindExtension(FileName), 128, WantAlpha);
+ NewImage = egDecodeAny(FileData, FileDataLength, 128 /* arbitrary value */, WantAlpha);
FreePool(FileData);
return NewImage;
}
// Load an icon from (BaseDir)/Path, extracting the icon of size IconSize x IconSize.
-// If the initial attempt is unsuccessful, try again, replacing the directory
-// component of Path with DEFAULT_ICONS_DIR.
-// Note: The assumption is that BaseDir points to rEFInd's home directory and Path
-// includes one subdirectory level. If this changes in future revisions, it may be
-// necessary to alter the code that tries again with DEFAULT_ICONS_DIR.
// Returns a pointer to the image data, or NULL if the icon could not be loaded.
EG_IMAGE * egLoadIcon(IN EFI_FILE* BaseDir, IN CHAR16 *Path, IN UINTN IconSize)
{
EFI_STATUS Status;
UINT8 *FileData;
UINTN FileDataLength;
- CHAR16 *FileName, FileName2[256];
- EG_IMAGE *NewImage;
+ EG_IMAGE *Image, *NewImage;
if (BaseDir == NULL || Path == NULL)
return NULL;
// load file
Status = egLoadFile(BaseDir, Path, &FileData, &FileDataLength);
- if (EFI_ERROR(Status)) {
- FileName = Basename(Path); // Note: FileName is a pointer within Path; DON'T FREE IT!
- SPrint(FileName2, 255, L"%s\\%s", DEFAULT_ICONS_DIR, FileName);
- Status = egLoadFile(BaseDir, FileName2, &FileData, &FileDataLength);
- if (EFI_ERROR(Status))
- return NULL;
- }
+ if (EFI_ERROR(Status))
+ return NULL;
// decode it
- NewImage = egDecodeAny(FileData, FileDataLength, egFindExtension(Path), IconSize, TRUE);
+ Image = egDecodeAny(FileData, FileDataLength, IconSize, TRUE);
FreePool(FileData);
+ if ((Image->Width != IconSize) || (Image->Height != IconSize)) {
+ NewImage = egScaleImage(Image, IconSize, IconSize);
+ if (!NewImage)
+ Print(L"Warning: Unable to scale icon of the wrong size from '%s'\n", Path);
+ egFreeImage(Image);
+ Image = NewImage;
+ }
- return NewImage;
+ return Image;
} // EG_IMAGE *egLoadIcon()
-EG_IMAGE * egDecodeImage(IN UINT8 *FileData, IN UINTN FileDataLength, IN CHAR16 *Format, IN BOOLEAN WantAlpha)
-{
- return egDecodeAny(FileData, FileDataLength, Format, 128, WantAlpha);
-}
+// Returns an icon of any type from the specified subdirectory using the specified
+// base name. All directory references are relative to BaseDir. For instance, if
+// SubdirName is "myicons" and BaseName is "os_linux", this function will return
+// an image based on "myicons/os_linux.icns" or "myicons/os_linux.png", in that
+// order of preference. Returns NULL if no such file is a valid icon file.
+EG_IMAGE * egLoadIconAnyType(IN EFI_FILE *BaseDir, IN CHAR16 *SubdirName, IN CHAR16 *BaseName, IN UINTN IconSize) {
+ EG_IMAGE *Image = NULL;
+ CHAR16 *Extension;
+ CHAR16 FileName[256];
+ UINTN i = 0;
+
+ while (((Extension = FindCommaDelimited(ICON_EXTENSIONS, i++)) != NULL) && (Image == NULL)) {
+ SPrint(FileName, 255, L"%s\\%s.%s", SubdirName, BaseName, Extension);
+ Image = egLoadIcon(BaseDir, FileName, IconSize);
+ MyFreePool(Extension);
+ } // while()
+
+ return Image;
+} // EG_IMAGE *egLoadIconAnyType()
+
+// Returns an icon with any extension in ICON_EXTENSIONS from either the directory
+// specified by GlobalConfig.IconsDir or DEFAULT_ICONS_DIR. The input BaseName
+// should be the icon name without an extension. For instance, if BaseName is
+// os_linux, GlobalConfig.IconsDir is myicons, DEFAULT_ICONS_DIR is icons, and
+// ICON_EXTENSIONS is "icns,png", this function will return myicons/os_linux.icns,
+// myicons/os_linux.png, icons/os_linux.icns, or icons/os_linux.png, in that
+// order of preference. Returns NULL if no such icon can be found. All file
+// references are relative to SelfDir.
+EG_IMAGE * egFindIcon(IN CHAR16 *BaseName, IN UINTN IconSize) {
+ EG_IMAGE *Image = NULL;
+
+ if (GlobalConfig.IconsDir != NULL) {
+ Image = egLoadIconAnyType(SelfDir, GlobalConfig.IconsDir, BaseName, IconSize);
+ }
+
+ if (Image == NULL) {
+ Image = egLoadIconAnyType(SelfDir, DEFAULT_ICONS_DIR, BaseName, IconSize);
+ }
+
+ return Image;
+} // EG_IMAGE * egFindIcon()
EG_IMAGE * egPrepareEmbeddedImage(IN EG_EMBEDDED_IMAGE *EmbeddedImage, IN BOOLEAN WantAlpha)
{
UINTN i;
EG_PIXEL FillColor;
EG_PIXEL *PixelPtr;
-
+
FillColor = *Color;
if (!CompImage->HasAlpha)
FillColor.a = 0;
-
+
PixelPtr = CompImage->PixelData;
for (i = 0; i < CompImage->Width * CompImage->Height; i++, PixelPtr++)
*PixelPtr = FillColor;
EG_PIXEL FillColor;
EG_PIXEL *PixelPtr;
EG_PIXEL *PixelBasePtr;
-
+
egRestrictImageArea(CompImage, AreaPosX, AreaPosY, &AreaWidth, &AreaHeight);
-
+
if (AreaWidth > 0) {
FillColor = *Color;
if (!CompImage->HasAlpha)
FillColor.a = 0;
-
+
PixelBasePtr = CompImage->PixelData + AreaPosY * CompImage->Width + AreaPosX;
for (y = 0; y < AreaHeight; y++) {
PixelPtr = PixelBasePtr;
{
UINTN x, y;
EG_PIXEL *TopPtr, *CompPtr;
-
+
for (y = 0; y < Height; y++) {
TopPtr = TopBasePtr;
CompPtr = CompBasePtr;
UINTN Alpha;
UINTN RevAlpha;
UINTN Temp;
-
+
for (y = 0; y < Height; y++) {
TopPtr = TopBasePtr;
CompPtr = CompBasePtr;
VOID egComposeImage(IN OUT EG_IMAGE *CompImage, IN EG_IMAGE *TopImage, IN UINTN PosX, IN UINTN PosY)
{
UINTN CompWidth, CompHeight;
-
+
CompWidth = TopImage->Width;
CompHeight = TopImage->Height;
egRestrictImageArea(CompImage, PosX, PosY, &CompWidth, &CompHeight);
-
+
// compose
if (CompWidth > 0) {
- if (CompImage->HasAlpha) {
- CompImage->HasAlpha = FALSE;
- egSetPlane(PLPTR(CompImage, a), 0, CompImage->Width * CompImage->Height);
- }
-
- if (TopImage->HasAlpha)
+ if (TopImage->HasAlpha) {
egRawCompose(CompImage->PixelData + PosY * CompImage->Width + PosX, TopImage->PixelData,
CompWidth, CompHeight, CompImage->Width, TopImage->Width);
- else
+ } else {
egRawCopy(CompImage->PixelData + PosY * CompImage->Width + PosX, TopImage->PixelData,
CompWidth, CompHeight, CompImage->Width, TopImage->Width);
+ }
}
-}
-
-EG_IMAGE * egEnsureImageSize(IN EG_IMAGE *Image, IN UINTN Width, IN UINTN Height, IN EG_PIXEL *Color)
-{
- EG_IMAGE *NewImage;
-
- if (Image == NULL)
- return NULL;
- if (Image->Width == Width && Image->Height == Height)
- return Image;
-
- NewImage = egCreateFilledImage(Width, Height, Image->HasAlpha, Color);
- if (NewImage == NULL) {
- egFreeImage(Image);
- return NULL;
- }
- egComposeImage(NewImage, Image, 0, 0);
- egFreeImage(Image);
-
- return NewImage;
-}
+} /* VOID egComposeImage() */
//
// misc internal functions
VOID egInsertPlane(IN UINT8 *SrcDataPtr, IN UINT8 *DestPlanePtr, IN UINTN PixelCount)
{
UINTN i;
-
+
for (i = 0; i < PixelCount; i++) {
*DestPlanePtr = *SrcDataPtr++;
DestPlanePtr += 4;
VOID egSetPlane(IN UINT8 *DestPlanePtr, IN UINT8 Value, IN UINTN PixelCount)
{
UINTN i;
-
+
for (i = 0; i < PixelCount; i++) {
*DestPlanePtr = Value;
DestPlanePtr += 4;
VOID egCopyPlane(IN UINT8 *SrcPlanePtr, IN UINT8 *DestPlanePtr, IN UINTN PixelCount)
{
UINTN i;
-
+
for (i = 0; i < PixelCount; i++) {
*DestPlanePtr = *SrcPlanePtr;
DestPlanePtr += 4, SrcPlanePtr += 4;