diff options
Diffstat (limited to 'plugins/FreeImage/src/FreeImage/Conversion8.cpp')
| -rw-r--r-- | plugins/FreeImage/src/FreeImage/Conversion8.cpp | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/plugins/FreeImage/src/FreeImage/Conversion8.cpp b/plugins/FreeImage/src/FreeImage/Conversion8.cpp new file mode 100644 index 0000000000..867cf756ed --- /dev/null +++ b/plugins/FreeImage/src/FreeImage/Conversion8.cpp @@ -0,0 +1,327 @@ +// ==========================================================
+// Bitmap conversion routines
+//
+// Design and implementation by
+// - Floris van den Berg (flvdberg@wxs.nl)
+// - Hervé Drolon (drolon@infonie.fr)
+// - Jani Kajala (janik@remedy.fi)
+// - Karl-Heinz Bussian (khbussian@moss.de)
+//
+// This file is part of FreeImage 3
+//
+// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
+// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
+// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
+// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
+// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
+// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
+// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
+// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+// THIS DISCLAIMER.
+//
+// Use at your own risk!
+// ==========================================================
+
+#include "FreeImage.h"
+#include "Utilities.h"
+
+// ----------------------------------------------------------
+// internal conversions X to 8 bits
+// ----------------------------------------------------------
+
+void DLL_CALLCONV
+FreeImage_ConvertLine1To8(BYTE *target, BYTE *source, int width_in_pixels) {
+ for (int cols = 0; cols < width_in_pixels; cols++)
+ target[cols] = (source[cols >> 3] & (0x80 >> (cols & 0x07))) != 0 ? 255 : 0;
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine4To8(BYTE *target, BYTE *source, int width_in_pixels) {
+ int count_new = 0;
+ int count_org = 0;
+ BOOL hinibble = TRUE;
+
+ while (count_new < width_in_pixels) {
+ if (hinibble) {
+ target[count_new] = (source[count_org] & 0xF0) >> 4;
+ } else {
+ target[count_new] = (source[count_org] & 0x0F);
+
+ count_org++;
+ }
+
+ hinibble = !hinibble;
+
+ count_new++;
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine16To8_555(BYTE *target, BYTE *source, int width_in_pixels) {
+ WORD *bits = (WORD *)source;
+
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[cols] = GREY((((bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F,
+ (((bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F,
+ (((bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F);
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine16To8_565(BYTE *target, BYTE *source, int width_in_pixels) {
+ WORD *bits = (WORD *)source;
+
+ for (int cols = 0; cols < width_in_pixels; cols++)
+ target[cols] = GREY((((bits[cols] & FI16_565_RED_MASK) >> FI16_565_RED_SHIFT) * 0xFF) / 0x1F,
+ (((bits[cols] & FI16_565_GREEN_MASK) >> FI16_565_GREEN_SHIFT) * 0xFF) / 0x3F,
+ (((bits[cols] & FI16_565_BLUE_MASK) >> FI16_565_BLUE_SHIFT) * 0xFF) / 0x1F);
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine24To8(BYTE *target, BYTE *source, int width_in_pixels) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[cols] = GREY(source[FI_RGBA_RED], source[FI_RGBA_GREEN], source[FI_RGBA_BLUE]);
+
+ source += 3;
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine32To8(BYTE *target, BYTE *source, int width_in_pixels) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[cols] = GREY(source[FI_RGBA_RED], source[FI_RGBA_GREEN], source[FI_RGBA_BLUE]);
+
+ source += 4;
+ }
+}
+
+// ----------------------------------------------------------
+// smart convert X to 8 bits
+// ----------------------------------------------------------
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_ConvertTo8Bits(FIBITMAP *dib) {
+ if (!FreeImage_HasPixels(dib)) return NULL;
+
+ const int bpp = FreeImage_GetBPP(dib);
+
+ const FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
+ if ((image_type != FIT_BITMAP) && (image_type != FIT_UINT16)) {
+ return NULL;
+ }
+
+ if(bpp != 8) {
+ const int width = FreeImage_GetWidth(dib);
+ const int height = FreeImage_GetHeight(dib);
+ FIBITMAP *new_dib = FreeImage_Allocate(width, height, 8);
+
+ if(new_dib == NULL) {
+ return NULL;
+ }
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(new_dib, dib);
+
+ // Build a greyscale palette (*always* needed for image processing)
+
+ RGBQUAD *new_pal = FreeImage_GetPalette(new_dib);
+
+ for(int i = 0; i < 256; i++) {
+ new_pal[i].rgbRed = (BYTE)i;
+ new_pal[i].rgbGreen = (BYTE)i;
+ new_pal[i].rgbBlue = (BYTE)i;
+ }
+
+ if(image_type == FIT_BITMAP) {
+
+ switch(bpp) {
+ case 1:
+ {
+ if(FreeImage_GetColorType(dib) == FIC_PALETTE) {
+
+ // Copy the palette
+
+ RGBQUAD *old_pal = FreeImage_GetPalette(dib);
+ memcpy(&new_pal[0], &old_pal[0], sizeof(RGBQUAD));
+ memcpy(&new_pal[255], &old_pal[1], sizeof(RGBQUAD));
+
+ }
+ else if(FreeImage_GetColorType(dib) == FIC_MINISWHITE) {
+
+ // Reverse the grayscale palette
+
+ for(int i = 0; i < 256; i++) {
+ new_pal[i].rgbRed = new_pal[i].rgbGreen = new_pal[i].rgbBlue = (BYTE)(255 - i);
+ }
+ }
+
+
+ // Expand and copy the bitmap data
+
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine1To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+ return new_dib;
+ }
+
+ case 4 :
+ {
+ if(FreeImage_GetColorType(dib) == FIC_PALETTE) {
+
+ // Copy the palette
+
+ RGBQUAD *old_pal = FreeImage_GetPalette(dib);
+
+ for (int i = 0; i < 16; i++) {
+ new_pal[i].rgbRed = old_pal[i].rgbRed;
+ new_pal[i].rgbGreen = old_pal[i].rgbGreen;
+ new_pal[i].rgbBlue = old_pal[i].rgbBlue;
+ }
+ }
+
+ // Expand and copy the bitmap data
+
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine4To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+ return new_dib;
+ }
+
+ case 16 :
+ {
+ // Expand and copy the bitmap data
+
+ for (int rows = 0; rows < height; rows++) {
+ if ((FreeImage_GetRedMask(dib) == FI16_565_RED_MASK) && (FreeImage_GetGreenMask(dib) == FI16_565_GREEN_MASK) && (FreeImage_GetBlueMask(dib) == FI16_565_BLUE_MASK)) {
+ FreeImage_ConvertLine16To8_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ } else {
+ FreeImage_ConvertLine16To8_555(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+ }
+
+ return new_dib;
+ }
+
+ case 24 :
+ {
+ // Expand and copy the bitmap data
+
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+ return new_dib;
+ }
+
+ case 32 :
+ {
+ // Expand and copy the bitmap data
+
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine32To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+ return new_dib;
+ }
+ }
+
+ } else if(image_type == FIT_UINT16) {
+
+ const unsigned src_pitch = FreeImage_GetPitch(dib);
+ const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
+ const BYTE *src_bits = FreeImage_GetBits(dib);
+ BYTE *dst_bits = FreeImage_GetBits(new_dib);
+ for (int rows = 0; rows < height; rows++) {
+ const WORD *src_pixel = (WORD*)src_bits;
+ BYTE *dst_pixel = (BYTE*)dst_bits;
+ for(int cols = 0; cols < width; cols++) {
+ dst_pixel[cols] = (BYTE)(src_pixel[cols] >> 8);
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+
+ return new_dib;
+
+ }
+
+ } // bpp != 8
+
+ return FreeImage_Clone(dib);
+}
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_ConvertToGreyscale(FIBITMAP *dib) {
+ if (!FreeImage_HasPixels(dib)) return NULL;
+
+ const FREE_IMAGE_COLOR_TYPE color_type = FreeImage_GetColorType(dib);
+ const int bpp = FreeImage_GetBPP(dib);
+
+ if ((color_type == FIC_PALETTE) || (color_type == FIC_MINISWHITE)) {
+ const int width = FreeImage_GetWidth(dib);
+ const int height = FreeImage_GetHeight(dib);
+ FIBITMAP *new_dib = FreeImage_Allocate(width, height, 8);
+
+ if(new_dib == NULL) {
+ return NULL;
+ }
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(new_dib, dib);
+
+ // Build a greyscale palette
+
+ RGBQUAD *new_pal = FreeImage_GetPalette(new_dib);
+
+ for(int i = 0; i < 256; i++) {
+ new_pal[i].rgbRed = (BYTE)i;
+ new_pal[i].rgbGreen = (BYTE)i;
+ new_pal[i].rgbBlue = (BYTE)i;
+ }
+
+ // allocate a 24-bit buffer
+
+ BYTE *buffer = (BYTE*)malloc( CalculatePitch(CalculateLine(width, 24)) * sizeof(BYTE));
+ if(NULL == buffer) {
+ FreeImage_Unload(new_dib);
+ return NULL;
+ }
+
+ // Convert the palette to 24-bit, then to 8-bit
+
+ switch(bpp) {
+ case 1:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine1To24(buffer, FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
+ FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), buffer, width);
+ }
+ }
+ break;
+
+ case 4:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine4To24(buffer, FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
+ FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), buffer, width);
+ }
+ }
+ break;
+
+ case 8:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine8To24(buffer, FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
+ FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), buffer, width);
+ }
+ }
+ break;
+
+ }
+ free(buffer);
+
+ return new_dib;
+
+ }
+
+ // Convert the bitmap to 8-bit greyscale
+ return FreeImage_ConvertTo8Bits(dib);
+}
|