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-rw-r--r--Source/FreeImage/Conversion32.cpp319
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diff --git a/Source/FreeImage/Conversion32.cpp b/Source/FreeImage/Conversion32.cpp
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+// ==========================================================
+// Bitmap conversion routines
+//
+// Design and implementation by
+// - Floris van den Berg (flvdberg@wxs.nl)
+// - Hervé Drolon (drolon@infonie.fr)
+// - Jani Kajala (janik@remedy.fi)
+// - Detlev Vendt (detlev.vendt@brillit.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 32 bits
+// ----------------------------------------------------------
+
+void DLL_CALLCONV
+FreeImage_ConvertLine1To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
+
+ target[FI_RGBA_BLUE] = palette[index].rgbBlue;
+ target[FI_RGBA_GREEN] = palette[index].rgbGreen;
+ target[FI_RGBA_RED] = palette[index].rgbRed;
+ target[FI_RGBA_ALPHA] = 0xFF;
+ target += 4;
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine4To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
+ BOOL low_nibble = FALSE;
+ int x = 0;
+
+ for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
+ if (low_nibble) {
+ target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
+ target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
+ target[FI_RGBA_RED] = palette[LOWNIBBLE(source[x])].rgbRed;
+
+ x++;
+ } else {
+ target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
+ target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
+ target[FI_RGBA_RED] = palette[HINIBBLE(source[x]) >> 4].rgbRed;
+ }
+
+ low_nibble = !low_nibble;
+
+ target[FI_RGBA_ALPHA] = 0xFF;
+ target += 4;
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine8To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
+ target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
+ target[FI_RGBA_RED] = palette[source[cols]].rgbRed;
+ target[FI_RGBA_ALPHA] = 0xFF;
+ target += 4;
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine16To32_555(BYTE *target, BYTE *source, int width_in_pixels) {
+ WORD *bits = (WORD *)source;
+
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[FI_RGBA_RED] = (BYTE)((((bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F);
+ target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F);
+ target[FI_RGBA_BLUE] = (BYTE)((((bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F);
+ target[FI_RGBA_ALPHA] = 0xFF;
+ target += 4;
+ }
+}
+
+void DLL_CALLCONV
+FreeImage_ConvertLine16To32_565(BYTE *target, BYTE *source, int width_in_pixels) {
+ WORD *bits = (WORD *)source;
+
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[FI_RGBA_RED] = (BYTE)((((bits[cols] & FI16_565_RED_MASK) >> FI16_565_RED_SHIFT) * 0xFF) / 0x1F);
+ target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_565_GREEN_MASK) >> FI16_565_GREEN_SHIFT) * 0xFF) / 0x3F);
+ target[FI_RGBA_BLUE] = (BYTE)((((bits[cols] & FI16_565_BLUE_MASK) >> FI16_565_BLUE_SHIFT) * 0xFF) / 0x1F);
+ target[FI_RGBA_ALPHA] = 0xFF;
+ target += 4;
+ }
+}
+/*
+void DLL_CALLCONV
+FreeImage_ConvertLine24To32(BYTE *target, BYTE *source, int width_in_pixels) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ *(DWORD *)target = (*(DWORD *) source & FI_RGBA_RGB_MASK) | FI_RGBA_ALPHA_MASK;
+ target += 4;
+ source += 3;
+ }
+}
+*/
+/**
+This unoptimized version of the conversion function avoid an undetermined bug with VC++ SP6.
+The bug occurs in release mode only, when the image height is equal to 537
+(try e.g. a size of 432x537 to reproduce the bug with the optimized function).
+*/
+void DLL_CALLCONV
+FreeImage_ConvertLine24To32(BYTE *target, BYTE *source, int width_in_pixels) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[FI_RGBA_RED] = source[FI_RGBA_RED];
+ target[FI_RGBA_GREEN] = source[FI_RGBA_GREEN];
+ target[FI_RGBA_BLUE] = source[FI_RGBA_BLUE];
+ target[FI_RGBA_ALPHA] = 0xFF;
+ target += 4;
+ source += 3;
+ }
+}
+// ----------------------------------------------------------
+
+static void DLL_CALLCONV
+MapTransparentTableToAlpha1(RGBQUAD *target, BYTE *source, BYTE *table, int transparent_pixels, int width_in_pixels) {
+ for (int cols = 0 ; cols < width_in_pixels ; cols++) {
+ int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
+ target[cols].rgbReserved = (index < transparent_pixels) ? table[index] : 255;
+ }
+}
+
+static void DLL_CALLCONV
+MapTransparentTableToAlpha4(RGBQUAD *target, BYTE *source, BYTE *table, int transparent_pixels, int width_in_pixels) {
+ BOOL low_nibble = FALSE;
+ int x = 0;
+
+ for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
+ int index;
+ if (low_nibble) {
+ index = LOWNIBBLE(source[x]);
+ x++;
+ } else {
+ index = HINIBBLE(source[x]) >> 4;
+ }
+ target[cols].rgbReserved = (index < transparent_pixels) ? table[index] : 255;
+ low_nibble = !low_nibble;
+ }
+}
+
+static void DLL_CALLCONV
+MapTransparentTableToAlpha8(RGBQUAD *target, BYTE *source, BYTE *table, int transparent_pixels, int width_in_pixels) {
+ for (int cols = 0; cols < width_in_pixels; cols++) {
+ target[cols].rgbReserved = (source[cols] < transparent_pixels) ? table[source[cols]] : 255;
+ }
+}
+
+// ----------------------------------------------------------
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_ConvertTo32Bits(FIBITMAP *dib) {
+ if(!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_RGB16) && (image_type != FIT_RGBA16)) {
+ return NULL;
+ }
+
+ const int width = FreeImage_GetWidth(dib);
+ const int height = FreeImage_GetHeight(dib);
+
+ if(image_type == FIT_BITMAP) {
+
+ if(bpp == 32) {
+ return FreeImage_Clone(dib);
+ }
+
+ FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
+ if(new_dib == NULL) {
+ return NULL;
+ }
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(new_dib, dib);
+
+ switch(bpp) {
+ case 1:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine1To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
+
+ if (FreeImage_IsTransparent(dib)) {
+ MapTransparentTableToAlpha1((RGBQUAD *)FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib), width);
+ }
+ }
+
+ return new_dib;
+ }
+
+ case 4:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine4To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
+
+ if (FreeImage_IsTransparent(dib)) {
+ MapTransparentTableToAlpha4((RGBQUAD *)FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib), width);
+ }
+ }
+
+ return new_dib;
+ }
+
+ case 8:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine8To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
+
+ if (FreeImage_IsTransparent(dib)) {
+ MapTransparentTableToAlpha8((RGBQUAD *)FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib), width);
+ }
+ }
+
+ return new_dib;
+ }
+
+ case 16:
+ {
+ 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_ConvertLine16To32_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ } else {
+ // includes case where all the masks are 0
+ FreeImage_ConvertLine16To32_555(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+ }
+
+ return new_dib;
+ }
+
+ case 24:
+ {
+ for (int rows = 0; rows < height; rows++) {
+ FreeImage_ConvertLine24To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
+ }
+
+ return new_dib;
+ }
+ }
+
+ } else if(image_type == FIT_RGB16) {
+ FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
+ if(new_dib == NULL) {
+ return NULL;
+ }
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(new_dib, dib);
+
+ 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 FIRGB16 *src_pixel = (FIRGB16*)src_bits;
+ RGBQUAD *dst_pixel = (RGBQUAD*)dst_bits;
+ for(int cols = 0; cols < width; cols++) {
+ dst_pixel[cols].rgbRed = (BYTE)(src_pixel[cols].red >> 8);
+ dst_pixel[cols].rgbGreen = (BYTE)(src_pixel[cols].green >> 8);
+ dst_pixel[cols].rgbBlue = (BYTE)(src_pixel[cols].blue >> 8);
+ dst_pixel[cols].rgbReserved = (BYTE)0xFF;
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+
+ return new_dib;
+
+ } else if(image_type == FIT_RGBA16) {
+ FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
+ if(new_dib == NULL) {
+ return NULL;
+ }
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(new_dib, dib);
+
+ 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 FIRGBA16 *src_pixel = (FIRGBA16*)src_bits;
+ RGBQUAD *dst_pixel = (RGBQUAD*)dst_bits;
+ for(int cols = 0; cols < width; cols++) {
+ dst_pixel[cols].rgbRed = (BYTE)(src_pixel[cols].red >> 8);
+ dst_pixel[cols].rgbGreen = (BYTE)(src_pixel[cols].green >> 8);
+ dst_pixel[cols].rgbBlue = (BYTE)(src_pixel[cols].blue >> 8);
+ dst_pixel[cols].rgbReserved = (BYTE)(src_pixel[cols].alpha >> 8);
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+
+ return new_dib;
+ }
+
+ return NULL;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 18:38:51 +0000