+ if (ImageFileName)
+ strcpy(filename, ImageFileName);
+
+ wxPNGReaderIter iter(this);
+ FILE *fp;
+ png_struct *png_ptr;
+ png_info *info_ptr;
+
+ /* open the file */
+ fp = fopen(filename, "wb");
+ if (!fp)
+ return FALSE;
+
+ /* allocate the necessary structures */
+ png_ptr = new (png_struct);
+ if (!png_ptr)
+ {
+ fclose(fp);
+ return FALSE;
+ }
+
+ info_ptr = new (png_info);
+ if (!info_ptr)
+ {
+ fclose(fp);
+ delete png_ptr;
+ return FALSE;
+ }
+
+ /* set error handling */
+ if (setjmp(png_ptr->jmpbuf))
+ {
+ png_write_destroy(png_ptr);
+ fclose(fp);
+ delete png_ptr;
+ delete info_ptr;
+
+ /* If we get here, we had a problem reading the file */
+ return FALSE;
+ }
+ //png_set_error(ima_png_error, NULL);
+
+ // printf("writig pg %s ", filename);
+ /* initialize the structures */
+ png_info_init(info_ptr);
+ png_write_init(png_ptr);
+
+ int row_stride = GetWidth() * ((GetDepth()+7)>>3);
+ /* set up the output control */
+ png_init_io(png_ptr, fp);
+
+ /* set the file information here */
+ info_ptr->width = GetWidth();
+ info_ptr->height = GetHeight();
+ info_ptr->pixel_depth = GetDepth();
+ info_ptr->channels = (GetDepth()>8) ? 3: 1;
+ info_ptr->bit_depth = GetDepth()/info_ptr->channels;
+ info_ptr->color_type = GetColorType();
+ info_ptr->compression_type = info_ptr->filter_type = info_ptr->interlace_type=0;
+ info_ptr->valid = 0;
+ info_ptr->rowbytes = row_stride;
+
+
+ // printf("P = %d D = %d RS= %d GD= %d CH= %d ", info_ptr->pixel_depth, info_ptr->bit_depth, row_stride, GetDepth(), info_ptr->channels);
+ /* set the palette if there is one */
+ if ((GetColorType() & COLORTYPE_PALETTE) && GetPalette())
+ {
+ // printf("writing paleta[%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette());
+ info_ptr->valid |= PNG_INFO_PLTE;
+ info_ptr->palette = new png_color[256];
+ info_ptr->num_palette = 256;
+ for (int i=0; i<256; i++)
+ GetPalette()->GetRGB(i, &info_ptr->palette[i].red, &info_ptr->palette[i].green, &info_ptr->palette[i].blue);
+ }
+ // printf("Paleta [%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette());
+
+
+ /* optional significant bit chunk */
+ // info_ptr->valid |= PNG_INFO_sBIT;
+ // info_ptr->sig_bit = true_bit_depth;
+
+ /* optional gamma chunk */
+ // info_ptr->valid |= PNG_INFO_gAMA;
+ // info_ptr->gamma = gamma;
+
+ /* other optional chunks */
+
+ /* write the file information */
+ png_write_info(png_ptr, info_ptr);
+
+ /* set up the transformations you want. Note that these are
+ all optional. Only call them if you want them */
+
+ /* shift the pixels up to a legal bit depth and fill in
+ as appropriate to correctly scale the image */
+ // png_set_shift(png_ptr, &(info_ptr->sig_bit));
+
+ /* pack pixels into bytes */
+ // png_set_packing(png_ptr);
+
+ /* flip bgr pixels to rgb */
+ // png_set_bgr(png_ptr);
+
+ /* swap bytes of 16 bit files to most significant bit first */
+ // png_set_swap(png_ptr);
+
+ /* get rid of filler bytes, pack rgb into 3 bytes */
+ // png_set_rgbx(png_ptr);
+
+ /* If you are only writing one row at a time, this works */
+
+ byte *row_pointers = new byte[row_stride];
+ iter.upset();
+ do {
+ // (unsigned char *)iter.GetRow();
+ iter.GetRow(row_pointers, row_stride);
+ png_write_row(png_ptr, row_pointers);
+ } while(iter.PrevRow());
+
+ delete[] row_pointers;
+
+ /* write the rest of the file */
+ png_write_end(png_ptr, info_ptr);
+
+ /* clean up after the write, and free any memory allocated */
projects / wxWidgets.git / blobdiff