changed imagetopng() function to correctly deal with non-standard bit-depths. Add png support for win32. (from winfried)
This commit is contained in:
Antonin Descampe
parent
709068ef5b
commit
161891a06e
1
CHANGES
1
CHANGES
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@ -6,6 +6,7 @@ What's New for OpenJPEG
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+ : added
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November 15, 2010
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! [antonin] changed imagetopng() function to correctly deal with non-standard bit-depths. Add png support for win32. (from winfried)
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* [antonin] minor changes in header inclusions
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* [antonin] complete rewrite of opj_convert.c with correct values (from winfried)
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145
codec/convert.c
145
codec/convert.c
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@ -29,15 +29,15 @@
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <opj_config.h>
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#define TEST_WITH_GAMMA
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#include "../opj_config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_LIBTIFF
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#ifdef WIN32
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#include "tiffio.h"
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#include "../libs/libtiff/tiffio.h"
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#else
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#include <tiffio.h>
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#endif /* WIN32 */
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@ -45,13 +45,13 @@
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#ifdef HAVE_LIBPNG
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#ifdef WIN32
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#include "png.h"
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#include "../libs/png/png.h"
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#else
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#include <png.h>
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#endif /* WIN32 */
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#endif /* HAVE_LIBPNG */
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#include "openjpeg.h"
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#include "../libopenjpeg/openjpeg.h"
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#include "convert.h"
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/*
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@ -1478,7 +1478,7 @@ int imagetotif(opj_image_t * image, const char *outfile) {
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adjust = image->comps[0].sgnd ? 1 << (image->comps[0].prec - 1) : 0;
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for (strip = 0; strip < TIFFNumberOfStrips(tif); strip++) {
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unsigned char *dat8;
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int i, ssize;
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tsize_t i, ssize;
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ssize = TIFFStripSize(tif);
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dat8 = (unsigned char*)buf;
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if (image->comps[0].prec == 8){
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@ -1638,9 +1638,9 @@ int imagetotif(opj_image_t * image, const char *outfile) {
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fprintf(stderr,"Aborting\n");
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return 1;
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}
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TIFFWriteEncodedStrip(tif, strip, buf, strip_size);
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(void)TIFFWriteEncodedStrip(tif, strip, (void*)buf, strip_size);
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}
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_TIFFfree(buf);
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_TIFFfree((void*)buf);
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TIFFClose(tif);
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}else if (image->numcomps == 1){
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/* -->> -->> -->>
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@ -1674,7 +1674,7 @@ int imagetotif(opj_image_t * image, const char *outfile) {
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index = 0;
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for (strip = 0; strip < TIFFNumberOfStrips(tif); strip++) {
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unsigned char *dat8;
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int i;
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tsize_t i;
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dat8 = (unsigned char*)buf;
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if (image->comps[0].prec == 8){
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for (i=0; i<TIFFStripSize(tif); i+=1) { // 8 bits per pixel
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@ -1725,7 +1725,7 @@ int imagetotif(opj_image_t * image, const char *outfile) {
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fprintf(stderr,"Aborting\n");
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return 1;
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}
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TIFFWriteEncodedStrip(tif, strip, buf, strip_size);
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(void)TIFFWriteEncodedStrip(tif, strip, (void*)buf, strip_size);
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}
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_TIFFfree(buf);
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TIFFClose(tif);
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@ -2187,12 +2187,6 @@ int imagetoraw(opj_image_t * image, const char *outfile)
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/* PNG allows bits per sample: 1, 2, 4, 8, 16 */
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opj_image_t *pngtoimage(const char *read_idf, opj_cparameters_t * params)
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#ifdef WIN32
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{
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printf("Error. PNG format is not yet handled under windows\n");
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return NULL;
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}
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#else
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{
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png_structp png;
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png_infop info;
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@ -2369,15 +2363,8 @@ fin:
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return image;
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}/* pngtoimage() */
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#endif /* WIN32 */
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int imagetopng(opj_image_t * image, const char *write_idf)
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#ifdef WIN32
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{
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printf("Error. PNG format is not yet handled under windows\n");
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return -1;
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}
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#else
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{
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FILE *writer;
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png_structp png;
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@ -2385,26 +2372,29 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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int *red, *green, *blue, *alpha;
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unsigned char *row_buf, *d;
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int has_alpha, width, height, nr_comp, color_type;
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int adjust, x, y, fails, is16;
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int opj_prec, prec;
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int adjustR, adjustG, adjustB, x, y, fails, is16, force16;
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int opj_prec, prec, ushift, dshift;;
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unsigned short mask;
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png_color_8 sig_bit;
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is16 = force16 = ushift = dshift = 0; fails = 1;
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prec = opj_prec = image->comps[0].prec;
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if(prec > 8) prec = 16;
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if(prec > 8 && prec < 16)
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{
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prec = 16; force16 = 1;
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}
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if(prec != 1 && prec != 2 && prec != 4 && prec != 8 && prec != 16)
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{
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fprintf(stderr,"imagetopng: can not create %s"
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"\n\twrong bit_depth %d\n", write_idf, prec);
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return 1;
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return fails;
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}
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writer = fopen(write_idf, "wb");
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if(writer == NULL) return 1;
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if(writer == NULL) return fails;
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info = NULL; fails = 1; has_alpha = 0;
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info = NULL; has_alpha = 0;
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/* Create and initialize the png_struct with the desired error handler
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* functions. If you want to use the default stderr and longjump method,
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@ -2444,9 +2434,8 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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*/
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png_set_compression_level(png, Z_BEST_COMPRESSION);
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adjust = 0;
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if(image->comps[0].sgnd) adjust = 1 << (opj_prec - 1);
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if(prec == 16) mask = 0xffff;
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else
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if(prec == 8) mask = 0x00ff;
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else
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if(prec == 4) mask = 0x000f;
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@ -2454,10 +2443,6 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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if(prec == 2) mask = 0x0003;
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else
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if(prec == 1) mask = 0x0001;
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else
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if(opj_prec == 12) mask = 0x0fff;
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else
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mask = 0xffff;
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nr_comp = image->numcomps;
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@ -2469,6 +2454,8 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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&& image->comps[0].prec == image->comps[1].prec
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&& image->comps[1].prec == image->comps[2].prec)
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{
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int v;
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has_alpha = (nr_comp > 3);
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is16 = (prec == 16);
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@ -2503,18 +2490,17 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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/*=============================*/
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png_write_info(png, info);
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/*=============================*/
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/* Shift the pixels up to a legal bit depth and fill in
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* as appropriate to correctly scale the image.
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*/
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if(opj_prec > 8 && opj_prec < 16)
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{
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png_set_shift(png, &sig_bit);
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}
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if(opj_prec < 8)
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{
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png_set_packing(png);
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}
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if(force16)
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{
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ushift = 16 - opj_prec; dshift = opj_prec - ushift;
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}
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adjustR = (image->comps[0].sgnd ? 1 << (image->comps[0].prec - 1) : 0);
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adjustG = (image->comps[1].sgnd ? 1 << (image->comps[1].prec - 1) : 0);
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adjustB = (image->comps[2].sgnd ? 1 << (image->comps[2].prec - 1) : 0);
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row_buf = (unsigned char*)malloc(width * nr_comp * 2);
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@ -2527,29 +2513,41 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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if(is16)
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{
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/* Network byte order */
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unsigned short v;
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v = *red + adjustR; ++red;
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if(force16) { v = (v<<ushift) + (v>>dshift); }
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v = (unsigned short)((*red + adjust) & mask); ++red;
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*d++ = (unsigned char)(v>>8); *d++ = (unsigned char)v;
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v = (unsigned short)((*green + adjust) & mask); ++green;
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v = *green + adjustG; ++green;
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if(force16) { v = (v<<ushift) + (v>>dshift); }
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*d++ = (unsigned char)(v>>8); *d++ = (unsigned char)v;
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v = (unsigned short)((*blue + adjust) & mask); ++blue;
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v = *blue + adjustB; ++blue;
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if(force16) { v = (v<<ushift) + (v>>dshift); }
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*d++ = (unsigned char)(v>>8); *d++ = (unsigned char)v;
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if(has_alpha)
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{
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v = (unsigned short)((*alpha + adjust) & mask); ++alpha;
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v = *alpha++;
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if(force16) { v = (v<<ushift) + (v>>dshift); }
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*d++ = (unsigned char)(v>>8); *d++ = (unsigned char)v;
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}
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continue;
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}
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*d++ = (unsigned char)((*red + adjust) & mask); ++red;
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*d++ = (unsigned char)((*green + adjust) & mask); ++green;
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*d++ = (unsigned char)((*blue + adjust) & mask); ++blue;
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*d++ = (unsigned char)((*red + adjustR) & mask); ++red;
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*d++ = (unsigned char)((*green + adjustG) & mask); ++green;
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*d++ = (unsigned char)((*blue + adjustB) & mask); ++blue;
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if(has_alpha)
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{
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*d++ = (unsigned char)((*alpha + adjust) & mask); ++alpha;
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*d++ = (unsigned char)(*alpha & mask); ++alpha;
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}
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} /* for(x) */
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@ -2566,8 +2564,15 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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&& image->comps[0].dy == image->comps[1].dy
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&& image->comps[0].prec == image->comps[1].prec))
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{
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int v;
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red = image->comps[0].data;
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if(force16)
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{
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ushift = 16 - opj_prec; dshift = opj_prec - ushift;
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}
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sig_bit.gray = prec;
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sig_bit.red = sig_bit.green = sig_bit.blue = sig_bit.alpha = 0;
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alpha = NULL;
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@ -2588,20 +2593,11 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
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png_set_sBIT(png, info, &sig_bit);
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#ifdef TEST_WITH_GAMMA
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png_set_gAMA(png, info, 1.0);
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#endif
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/*=============================*/
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png_write_info(png, info);
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/*=============================*/
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adjustR = (image->comps[0].sgnd ? 1 << (image->comps[0].prec - 1) : 0);
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/* Shift the pixels up to a legal bit depth and fill in
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* as appropriate to correctly scale the image.
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*/
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if(opj_prec > 8 && opj_prec < 16)
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{
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png_set_shift(png, &sig_bit);
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}
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if(opj_prec < 8)
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{
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png_set_packing(png);
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@ -2610,25 +2606,29 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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if(prec > 8)
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{
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/* Network byte order */
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unsigned short v;
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row_buf = (unsigned char*)
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malloc(width * nr_comp * sizeof(unsigned short));
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if(opj_prec == 12) mask = 0x0fff;
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for(y = 0; y < height; ++y)
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{
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d = row_buf;
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for(x = 0; x < width; ++x)
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{
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v = (unsigned short)((*red + adjust) & mask); ++red;
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v = *red + adjustR; ++red;
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if(force16) { v = (v<<ushift) + (v>>dshift); }
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*d++ = (unsigned char)(v>>8); *d++ = (unsigned char)(v & 0xff);
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if(has_alpha)
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{
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v = (unsigned short)((*alpha + adjust) & mask); ++alpha;
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v = *alpha++;
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if(force16) { v = (v<<ushift) + (v>>dshift); }
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*d++ = (unsigned char)(v>>8); *d++ = (unsigned char)(v & 0xff);
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}
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}/* for(x) */
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@ -2647,11 +2647,11 @@ int imagetopng(opj_image_t * image, const char *write_idf)
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for(x = 0; x < width; ++x)
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{
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*d++ = (unsigned char)((*red + adjust) & mask); ++red;
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*d++ = (unsigned char)((*red + adjustR) & mask); ++red;
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if(has_alpha)
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{
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*d++ = (unsigned char)((*alpha + adjust) & mask); ++alpha;
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*d++ = (unsigned char)(*alpha & mask); ++alpha;
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}
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}/* for(x) */
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@ -2678,8 +2678,9 @@ fin:
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}
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fclose(writer);
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if(fails) remove(write_idf);
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return fails;
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}/* imagetopng() */
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#endif /* WIN32 */
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#endif /* HAVE_LIBPNG */
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