[master] Ported cosmetic changes to pngwrite.c
from libpng-1.4.0beta87.
This commit is contained in:
Glenn Randers-Pehrson
parent
eda90ace80
commit
d4e3ef6eae
343
pngwrite.c
343
pngwrite.c
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@ -1,7 +1,7 @@
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/* pngwrite.c - general routines to write a PNG file
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*
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* Last changed in libpng 1.2.37 [June 4, 2009]
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* Last changed in libpng 1.2.41 [October 17, 2009]
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* Copyright (c) 1998-2009 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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@ -29,23 +29,25 @@ void PNGAPI
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png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
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{
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png_debug(1, "in png_write_info_before_PLTE");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
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{
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png_write_sig(png_ptr); /* Write PNG signature */
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#if defined(PNG_MNG_FEATURES_SUPPORTED)
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/* Write PNG signature */
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png_write_sig(png_ptr);
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#ifdef PNG_MNG_FEATURES_SUPPORTED
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if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
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{
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png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
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png_ptr->mng_features_permitted=0;
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png_ptr->mng_features_permitted = 0;
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}
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#endif
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/* Write IHDR information. */
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png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
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info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
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info_ptr->filter_type,
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#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
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#ifdef PNG_WRITE_INTERLACING_SUPPORTED
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info_ptr->interlace_type);
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#else
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0);
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@ -53,7 +55,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
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/* The rest of these check to see if the valid field has the appropriate
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* flag set, and if it does, writes the chunk.
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*/
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#if defined(PNG_WRITE_gAMA_SUPPORTED)
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#ifdef PNG_WRITE_gAMA_SUPPORTED
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if (info_ptr->valid & PNG_INFO_gAMA)
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{
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# ifdef PNG_FLOATING_POINT_SUPPORTED
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@ -65,20 +67,20 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
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#endif
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}
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#endif
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#if defined(PNG_WRITE_sRGB_SUPPORTED)
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#ifdef PNG_WRITE_sRGB_SUPPORTED
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if (info_ptr->valid & PNG_INFO_sRGB)
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png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
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#endif
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#if defined(PNG_WRITE_iCCP_SUPPORTED)
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#ifdef PNG_WRITE_iCCP_SUPPORTED
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if (info_ptr->valid & PNG_INFO_iCCP)
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png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
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info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
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#endif
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#if defined(PNG_WRITE_sBIT_SUPPORTED)
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#ifdef PNG_WRITE_sBIT_SUPPORTED
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if (info_ptr->valid & PNG_INFO_sBIT)
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png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
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#endif
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#if defined(PNG_WRITE_cHRM_SUPPORTED)
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#ifdef PNG_WRITE_cHRM_SUPPORTED
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if (info_ptr->valid & PNG_INFO_cHRM)
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{
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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@ -98,7 +100,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
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#endif
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}
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#endif
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#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
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#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
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if (info_ptr->unknown_chunks_num)
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{
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png_unknown_chunk *up;
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@ -109,7 +111,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
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up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
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up++)
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{
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int keep=png_handle_as_unknown(png_ptr, up->name);
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int keep = png_handle_as_unknown(png_ptr, up->name);
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if (keep != PNG_HANDLE_CHUNK_NEVER &&
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up->location && !(up->location & PNG_HAVE_PLTE) &&
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!(up->location & PNG_HAVE_IDAT) &&
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@ -147,16 +149,16 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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png_error(png_ptr, "Valid palette required for paletted images");
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#if defined(PNG_WRITE_tRNS_SUPPORTED)
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#ifdef PNG_WRITE_tRNS_SUPPORTED
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if (info_ptr->valid & PNG_INFO_tRNS)
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{
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#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
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#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
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/* Invert the alpha channel (in tRNS) */
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if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
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info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
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{
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int j;
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for (j=0; j<(int)info_ptr->num_trans; j++)
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for (j = 0; j<(int)info_ptr->num_trans; j++)
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info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]);
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}
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#endif
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@ -164,29 +166,29 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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info_ptr->num_trans, info_ptr->color_type);
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}
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#endif
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#if defined(PNG_WRITE_bKGD_SUPPORTED)
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#ifdef PNG_WRITE_bKGD_SUPPORTED
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if (info_ptr->valid & PNG_INFO_bKGD)
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png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type);
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#endif
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#if defined(PNG_WRITE_hIST_SUPPORTED)
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#ifdef PNG_WRITE_hIST_SUPPORTED
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if (info_ptr->valid & PNG_INFO_hIST)
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png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);
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#endif
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#if defined(PNG_WRITE_oFFs_SUPPORTED)
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#ifdef PNG_WRITE_oFFs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_oFFs)
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png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset,
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info_ptr->offset_unit_type);
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#endif
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#if defined(PNG_WRITE_pCAL_SUPPORTED)
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#ifdef PNG_WRITE_pCAL_SUPPORTED
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if (info_ptr->valid & PNG_INFO_pCAL)
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png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0,
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info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
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info_ptr->pcal_units, info_ptr->pcal_params);
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#endif
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#if defined(PNG_sCAL_SUPPORTED)
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#ifdef PNG_sCAL_SUPPORTED
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if (info_ptr->valid & PNG_INFO_sCAL)
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#if defined(PNG_WRITE_sCAL_SUPPORTED)
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#ifdef PNG_WRITE_sCAL_SUPPORTED
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#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO)
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png_write_sCAL(png_ptr, (int)info_ptr->scal_unit,
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info_ptr->scal_pixel_width, info_ptr->scal_pixel_height);
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@ -202,13 +204,13 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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#endif /* WRITE_sCAL */
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#endif /* sCAL */
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#if defined(PNG_WRITE_pHYs_SUPPORTED)
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#ifdef PNG_WRITE_pHYs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_pHYs)
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png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
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info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
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#endif /* pHYs */
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#if defined(PNG_WRITE_tIME_SUPPORTED)
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#ifdef PNG_WRITE_tIME_SUPPORTED
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if (info_ptr->valid & PNG_INFO_tIME)
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{
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png_write_tIME(png_ptr, &(info_ptr->mod_time));
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@ -216,13 +218,13 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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}
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#endif /* tIME */
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#if defined(PNG_WRITE_sPLT_SUPPORTED)
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#ifdef PNG_WRITE_sPLT_SUPPORTED
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if (info_ptr->valid & PNG_INFO_sPLT)
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for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
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png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
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#endif /* sPLT */
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#if defined(PNG_WRITE_TEXT_SUPPORTED)
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#ifdef PNG_WRITE_TEXT_SUPPORTED
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/* Check to see if we need to write text chunks */
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for (i = 0; i < info_ptr->num_text; i++)
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{
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@ -231,7 +233,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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/* An internationalized chunk? */
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if (info_ptr->text[i].compression > 0)
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{
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#if defined(PNG_WRITE_iTXt_SUPPORTED)
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#ifdef PNG_WRITE_iTXt_SUPPORTED
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/* Write international chunk */
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png_write_iTXt(png_ptr,
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info_ptr->text[i].compression,
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@ -248,7 +250,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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/* If we want a compressed text chunk */
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else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt)
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{
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#if defined(PNG_WRITE_zTXt_SUPPORTED)
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#ifdef PNG_WRITE_zTXt_SUPPORTED
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/* Write compressed chunk */
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png_write_zTXt(png_ptr, info_ptr->text[i].key,
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info_ptr->text[i].text, 0,
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@ -261,7 +263,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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}
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else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
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{
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#if defined(PNG_WRITE_tEXt_SUPPORTED)
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#ifdef PNG_WRITE_tEXt_SUPPORTED
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/* Write uncompressed chunk */
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png_write_tEXt(png_ptr, info_ptr->text[i].key,
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info_ptr->text[i].text,
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@ -276,18 +278,18 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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}
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#endif /* tEXt */
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#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
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#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
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if (info_ptr->unknown_chunks_num)
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{
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png_unknown_chunk *up;
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png_unknown_chunk *up;
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png_debug(5, "writing extra chunks");
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png_debug(5, "writing extra chunks");
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for (up = info_ptr->unknown_chunks;
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up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
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up++)
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{
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int keep=png_handle_as_unknown(png_ptr, up->name);
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for (up = info_ptr->unknown_chunks;
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up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
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up++)
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{
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int keep = png_handle_as_unknown(png_ptr, up->name);
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if (keep != PNG_HANDLE_CHUNK_NEVER &&
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up->location && (up->location & PNG_HAVE_PLTE) &&
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!(up->location & PNG_HAVE_IDAT) &&
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@ -296,7 +298,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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{
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png_write_chunk(png_ptr, up->name, up->data, up->size);
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}
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}
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}
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}
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#endif
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}
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@ -310,6 +312,7 @@ void PNGAPI
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png_write_end(png_structp png_ptr, png_infop info_ptr)
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{
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png_debug(1, "in png_write_end");
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if (png_ptr == NULL)
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return;
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if (!(png_ptr->mode & PNG_HAVE_IDAT))
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@ -318,16 +321,16 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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/* See if user wants us to write information chunks */
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if (info_ptr != NULL)
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{
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#if defined(PNG_WRITE_TEXT_SUPPORTED)
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int i; /* Local index variable */
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#ifdef PNG_WRITE_TEXT_SUPPORTED
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int i; /* local index variable */
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#endif
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#if defined(PNG_WRITE_tIME_SUPPORTED)
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#ifdef PNG_WRITE_tIME_SUPPORTED
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/* Check to see if user has supplied a time chunk */
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if ((info_ptr->valid & PNG_INFO_tIME) &&
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!(png_ptr->mode & PNG_WROTE_tIME))
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png_write_tIME(png_ptr, &(info_ptr->mod_time));
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#endif
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#if defined(PNG_WRITE_TEXT_SUPPORTED)
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#ifdef PNG_WRITE_TEXT_SUPPORTED
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/* Loop through comment chunks */
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for (i = 0; i < info_ptr->num_text; i++)
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{
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@ -336,23 +339,23 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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/* An internationalized chunk? */
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if (info_ptr->text[i].compression > 0)
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{
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#if defined(PNG_WRITE_iTXt_SUPPORTED)
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/* Write international chunk */
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png_write_iTXt(png_ptr,
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info_ptr->text[i].compression,
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info_ptr->text[i].key,
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info_ptr->text[i].lang,
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info_ptr->text[i].lang_key,
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info_ptr->text[i].text);
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#ifdef PNG_WRITE_iTXt_SUPPORTED
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/* Write international chunk */
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png_write_iTXt(png_ptr,
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info_ptr->text[i].compression,
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info_ptr->text[i].key,
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info_ptr->text[i].lang,
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info_ptr->text[i].lang_key,
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info_ptr->text[i].text);
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#else
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png_warning(png_ptr, "Unable to write international text");
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png_warning(png_ptr, "Unable to write international text");
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#endif
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/* Mark this chunk as written */
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info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
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/* Mark this chunk as written */
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info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
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}
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else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
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{
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#if defined(PNG_WRITE_zTXt_SUPPORTED)
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#ifdef PNG_WRITE_zTXt_SUPPORTED
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/* Write compressed chunk */
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png_write_zTXt(png_ptr, info_ptr->text[i].key,
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info_ptr->text[i].text, 0,
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@ -365,7 +368,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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}
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else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
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{
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#if defined(PNG_WRITE_tEXt_SUPPORTED)
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#ifdef PNG_WRITE_tEXt_SUPPORTED
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/* Write uncompressed chunk */
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png_write_tEXt(png_ptr, info_ptr->text[i].key,
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info_ptr->text[i].text, 0);
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@ -378,18 +381,18 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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}
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}
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#endif
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#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
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#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
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if (info_ptr->unknown_chunks_num)
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{
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png_unknown_chunk *up;
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png_unknown_chunk *up;
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png_debug(5, "writing extra chunks");
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png_debug(5, "writing extra chunks");
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for (up = info_ptr->unknown_chunks;
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up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
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up++)
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{
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int keep=png_handle_as_unknown(png_ptr, up->name);
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for (up = info_ptr->unknown_chunks;
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up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
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up++)
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{
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int keep = png_handle_as_unknown(png_ptr, up->name);
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if (keep != PNG_HANDLE_CHUNK_NEVER &&
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up->location && (up->location & PNG_AFTER_IDAT) &&
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((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
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@ -397,7 +400,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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{
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png_write_chunk(png_ptr, up->name, up->data, up->size);
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}
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}
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}
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}
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#endif
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}
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@ -420,13 +423,14 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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#endif
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}
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#if defined(PNG_WRITE_tIME_SUPPORTED)
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#if !defined(_WIN32_WCE)
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#ifdef PNG_WRITE_tIME_SUPPORTED
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#ifndef _WIN32_WCE
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/* "time.h" functions are not supported on WindowsCE */
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void PNGAPI
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png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
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{
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png_debug(1, "in png_convert_from_struct_tm");
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ptime->year = (png_uint_16)(1900 + ttime->tm_year);
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ptime->month = (png_byte)(ttime->tm_mon + 1);
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ptime->day = (png_byte)ttime->tm_mday;
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@ -441,12 +445,14 @@ png_convert_from_time_t(png_timep ptime, time_t ttime)
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struct tm *tbuf;
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png_debug(1, "in png_convert_from_time_t");
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tbuf = gmtime(&ttime);
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png_convert_from_struct_tm(ptime, tbuf);
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}
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#endif
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#endif
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|
||||
|
||||
/* Initialize png_ptr structure, and allocate any memory needed */
|
||||
png_structp PNGAPI
|
||||
png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr,
|
||||
|
|
@ -465,16 +471,18 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
volatile
|
||||
volatile
|
||||
#endif
|
||||
png_structp png_ptr;
|
||||
png_structp png_ptr;
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
#ifdef USE_FAR_KEYWORD
|
||||
jmp_buf jmpbuf;
|
||||
#endif
|
||||
#endif
|
||||
int i;
|
||||
|
||||
png_debug(1, "in png_create_write_struct");
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
|
||||
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
|
||||
|
|
@ -486,8 +494,8 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
|
||||
/* Added at libpng-1.2.6 */
|
||||
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
||||
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
|
||||
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
|
||||
png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
|
||||
png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
|
|
@ -498,8 +506,13 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
#endif
|
||||
{
|
||||
png_free(png_ptr, png_ptr->zbuf);
|
||||
png_ptr->zbuf=NULL;
|
||||
png_destroy_struct(png_ptr);
|
||||
png_ptr->zbuf = NULL;
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2((png_voidp)png_ptr,
|
||||
(png_free_ptr)free_fn, (png_voidp)mem_ptr);
|
||||
#else
|
||||
png_destroy_struct((png_voidp)png_ptr);
|
||||
#endif
|
||||
return (NULL);
|
||||
}
|
||||
#ifdef USE_FAR_KEYWORD
|
||||
|
|
@ -514,12 +527,12 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
|
||||
if (user_png_ver)
|
||||
{
|
||||
i=0;
|
||||
do
|
||||
{
|
||||
if (user_png_ver[i] != png_libpng_ver[i])
|
||||
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
|
||||
} while (png_libpng_ver[i++]);
|
||||
i = 0;
|
||||
do
|
||||
{
|
||||
if (user_png_ver[i] != png_libpng_ver[i])
|
||||
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
|
||||
} while (png_libpng_ver[i++]);
|
||||
}
|
||||
|
||||
if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
|
||||
|
|
@ -537,10 +550,10 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
char msg[80];
|
||||
if (user_png_ver)
|
||||
{
|
||||
png_snprintf(msg, 80,
|
||||
"Application was compiled with png.h from libpng-%.20s",
|
||||
user_png_ver);
|
||||
png_warning(png_ptr, msg);
|
||||
png_snprintf(msg, 80,
|
||||
"Application was compiled with png.h from libpng-%.20s",
|
||||
user_png_ver);
|
||||
png_warning(png_ptr, msg);
|
||||
}
|
||||
png_snprintf(msg, 80,
|
||||
"Application is running with png.c from libpng-%.20s",
|
||||
|
|
@ -548,7 +561,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
png_warning(png_ptr, msg);
|
||||
#endif
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
png_ptr->flags=0;
|
||||
png_ptr->flags = 0;
|
||||
#endif
|
||||
png_error(png_ptr,
|
||||
"Incompatible libpng version in application and library");
|
||||
|
|
@ -558,20 +571,21 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
|
|||
/* Initialize zbuf - compression buffer */
|
||||
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
|
||||
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
|
||||
(png_uint_32)png_ptr->zbuf_size);
|
||||
(png_uint_32)png_ptr->zbuf_size);
|
||||
|
||||
png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
|
||||
png_flush_ptr_NULL);
|
||||
|
||||
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
|
||||
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
|
||||
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
|
||||
1, png_doublep_NULL, png_doublep_NULL);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
/* Applications that neglect to set up their own setjmp() and then encounter
|
||||
a png_error() will longjmp here. Since the jmpbuf is then meaningless we
|
||||
abort instead of returning. */
|
||||
/* Applications that neglect to set up their own setjmp() and then
|
||||
* encounter a png_error() will longjmp here. Since the jmpbuf is
|
||||
* then meaningless we abort instead of returning.
|
||||
*/
|
||||
#ifdef USE_FAR_KEYWORD
|
||||
if (setjmp(jmpbuf))
|
||||
PNG_ABORT();
|
||||
|
|
@ -606,13 +620,13 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
|
|||
png_sizeof(png_info) > png_info_size)
|
||||
{
|
||||
char msg[80];
|
||||
png_ptr->warning_fn=NULL;
|
||||
png_ptr->warning_fn = NULL;
|
||||
if (user_png_ver)
|
||||
{
|
||||
png_snprintf(msg, 80,
|
||||
"Application was compiled with png.h from libpng-%.20s",
|
||||
user_png_ver);
|
||||
png_warning(png_ptr, msg);
|
||||
png_snprintf(msg, 80,
|
||||
"Application was compiled with png.h from libpng-%.20s",
|
||||
user_png_ver);
|
||||
png_warning(png_ptr, msg);
|
||||
}
|
||||
png_snprintf(msg, 80,
|
||||
"Application is running with png.c from libpng-%.20s",
|
||||
|
|
@ -621,23 +635,23 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
|
|||
}
|
||||
#endif
|
||||
if (png_sizeof(png_struct) > png_struct_size)
|
||||
{
|
||||
png_ptr->error_fn=NULL;
|
||||
{
|
||||
png_ptr->error_fn = NULL;
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
png_ptr->flags=0;
|
||||
png_ptr->flags = 0;
|
||||
#endif
|
||||
png_error(png_ptr,
|
||||
"The png struct allocated by the application for writing is too small.");
|
||||
}
|
||||
png_error(png_ptr,
|
||||
"The png struct allocated by the application for writing is too small.");
|
||||
}
|
||||
if (png_sizeof(png_info) > png_info_size)
|
||||
{
|
||||
png_ptr->error_fn=NULL;
|
||||
{
|
||||
png_ptr->error_fn = NULL;
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
png_ptr->flags=0;
|
||||
png_ptr->flags = 0;
|
||||
#endif
|
||||
png_error(png_ptr,
|
||||
"The info struct allocated by the application for writing is too small.");
|
||||
}
|
||||
png_error(png_ptr,
|
||||
"The info struct allocated by the application for writing is too small.");
|
||||
}
|
||||
png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
|
||||
}
|
||||
#endif /* PNG_1_0_X || PNG_1_2_X */
|
||||
|
|
@ -647,9 +661,9 @@ void PNGAPI
|
|||
png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
|
||||
png_size_t png_struct_size)
|
||||
{
|
||||
png_structp png_ptr=*ptr_ptr;
|
||||
png_structp png_ptr = *ptr_ptr;
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
jmp_buf tmp_jmp; /* To save current jump buffer */
|
||||
jmp_buf tmp_jmp; /* to save current jump buffer */
|
||||
#endif
|
||||
|
||||
int i = 0;
|
||||
|
|
@ -659,17 +673,16 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
|
|||
|
||||
do
|
||||
{
|
||||
if (user_png_ver[i] != png_libpng_ver[i])
|
||||
{
|
||||
if (user_png_ver[i] != png_libpng_ver[i])
|
||||
{
|
||||
#ifdef PNG_LEGACY_SUPPORTED
|
||||
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
|
||||
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
|
||||
#else
|
||||
png_ptr->warning_fn=NULL;
|
||||
png_warning(png_ptr,
|
||||
png_ptr->warning_fn = NULL;
|
||||
png_warning(png_ptr,
|
||||
"Application uses deprecated png_write_init() and should be recompiled.");
|
||||
break;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
} while (png_libpng_ver[i++]);
|
||||
|
||||
png_debug(1, "in png_write_init_3");
|
||||
|
|
@ -680,19 +693,19 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
|
|||
#endif
|
||||
|
||||
if (png_sizeof(png_struct) > png_struct_size)
|
||||
{
|
||||
png_destroy_struct(png_ptr);
|
||||
png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
|
||||
*ptr_ptr = png_ptr;
|
||||
}
|
||||
{
|
||||
png_destroy_struct(png_ptr);
|
||||
png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
|
||||
*ptr_ptr = png_ptr;
|
||||
}
|
||||
|
||||
/* Reset all variables to 0 */
|
||||
png_memset(png_ptr, 0, png_sizeof(png_struct));
|
||||
|
||||
/* Added at libpng-1.2.6 */
|
||||
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
||||
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
|
||||
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
|
||||
png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
|
||||
png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
|
|
@ -706,9 +719,8 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
|
|||
/* Initialize zbuf - compression buffer */
|
||||
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
|
||||
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
|
||||
(png_uint_32)png_ptr->zbuf_size);
|
||||
|
||||
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
|
||||
(png_uint_32)png_ptr->zbuf_size);
|
||||
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
|
||||
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
|
||||
1, png_doublep_NULL, png_doublep_NULL);
|
||||
#endif
|
||||
|
|
@ -723,8 +735,8 @@ void PNGAPI
|
|||
png_write_rows(png_structp png_ptr, png_bytepp row,
|
||||
png_uint_32 num_rows)
|
||||
{
|
||||
png_uint_32 i; /* Row counter */
|
||||
png_bytepp rp; /* Row pointer */
|
||||
png_uint_32 i; /* row counter */
|
||||
png_bytepp rp; /* row pointer */
|
||||
|
||||
png_debug(1, "in png_write_rows");
|
||||
|
||||
|
|
@ -744,15 +756,16 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
|
|||
void PNGAPI
|
||||
png_write_image(png_structp png_ptr, png_bytepp image)
|
||||
{
|
||||
png_uint_32 i; /* Row index */
|
||||
int pass, num_pass; /* Pass variables */
|
||||
png_bytepp rp; /* Points to current row */
|
||||
png_uint_32 i; /* row index */
|
||||
int pass, num_pass; /* pass variables */
|
||||
png_bytepp rp; /* points to current row */
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_debug(1, "in png_write_image");
|
||||
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
|
||||
|
||||
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
|
||||
/* Initialize interlace handling. If image is not interlaced,
|
||||
* this will set pass to 1
|
||||
*/
|
||||
|
|
@ -777,6 +790,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
|
|||
{
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_debug2(1, "in png_write_row (row %ld, pass %d)",
|
||||
png_ptr->row_number, png_ptr->pass);
|
||||
|
||||
|
|
@ -821,7 +835,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
|
|||
png_write_start_row(png_ptr);
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
|
||||
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
|
||||
/* If interlaced and not interested in row, return */
|
||||
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
|
||||
{
|
||||
|
|
@ -902,7 +916,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
|
|||
png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row,
|
||||
png_ptr->row_info.rowbytes);
|
||||
|
||||
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
|
||||
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
|
||||
/* Handle interlacing */
|
||||
if (png_ptr->interlaced && png_ptr->pass < 6 &&
|
||||
(png_ptr->transformations & PNG_INTERLACE))
|
||||
|
|
@ -922,7 +936,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
|
|||
if (png_ptr->transformations)
|
||||
png_do_write_transformations(png_ptr);
|
||||
|
||||
#if defined(PNG_MNG_FEATURES_SUPPORTED)
|
||||
#ifdef PNG_MNG_FEATURES_SUPPORTED
|
||||
/* Write filter_method 64 (intrapixel differencing) only if
|
||||
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
|
||||
* 2. Libpng did not write a PNG signature (this filter_method is only
|
||||
|
|
@ -947,12 +961,13 @@ png_write_row(png_structp png_ptr, png_bytep row)
|
|||
(*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
#ifdef PNG_WRITE_FLUSH_SUPPORTED
|
||||
/* Set the automatic flush interval or 0 to turn flushing off */
|
||||
void PNGAPI
|
||||
png_set_flush(png_structp png_ptr, int nrows)
|
||||
{
|
||||
png_debug(1, "in png_set_flush");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
|
||||
|
|
@ -965,6 +980,7 @@ png_write_flush(png_structp png_ptr)
|
|||
int wrote_IDAT;
|
||||
|
||||
png_debug(1, "in png_write_flush");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
/* We have already written out all of the data */
|
||||
|
|
@ -1025,6 +1041,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
|
|||
#endif
|
||||
|
||||
png_debug(1, "in png_destroy_write_struct");
|
||||
|
||||
if (png_ptr_ptr != NULL)
|
||||
{
|
||||
png_ptr = *png_ptr_ptr;
|
||||
|
|
@ -1051,11 +1068,11 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
|
|||
{
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
|
||||
if (png_ptr->num_chunk_list)
|
||||
{
|
||||
png_free(png_ptr, png_ptr->chunk_list);
|
||||
png_ptr->chunk_list=NULL;
|
||||
png_ptr->chunk_list = NULL;
|
||||
png_ptr->num_chunk_list = 0;
|
||||
}
|
||||
#endif
|
||||
|
|
@ -1099,6 +1116,7 @@ png_write_destroy(png_structp png_ptr)
|
|||
#endif
|
||||
|
||||
png_debug(1, "in png_write_destroy");
|
||||
|
||||
/* Free any memory zlib uses */
|
||||
deflateEnd(&png_ptr->zstream);
|
||||
|
||||
|
|
@ -1113,11 +1131,11 @@ png_write_destroy(png_structp png_ptr)
|
|||
png_free(png_ptr, png_ptr->paeth_row);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_TIME_RFC1123_SUPPORTED)
|
||||
#ifdef PNG_TIME_RFC1123_SUPPORTED
|
||||
png_free(png_ptr, png_ptr->time_buffer);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
|
||||
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
|
||||
png_free(png_ptr, png_ptr->prev_filters);
|
||||
png_free(png_ptr, png_ptr->filter_weights);
|
||||
png_free(png_ptr, png_ptr->inv_filter_weights);
|
||||
|
|
@ -1156,9 +1174,10 @@ void PNGAPI
|
|||
png_set_filter(png_structp png_ptr, int method, int filters)
|
||||
{
|
||||
png_debug(1, "in png_set_filter");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
#if defined(PNG_MNG_FEATURES_SUPPORTED)
|
||||
#ifdef PNG_MNG_FEATURES_SUPPORTED
|
||||
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
|
||||
(method == PNG_INTRAPIXEL_DIFFERENCING))
|
||||
method = PNG_FILTER_TYPE_BASE;
|
||||
|
|
@ -1171,22 +1190,22 @@ png_set_filter(png_structp png_ptr, int method, int filters)
|
|||
case 5:
|
||||
case 6:
|
||||
case 7: png_warning(png_ptr, "Unknown row filter for method 0");
|
||||
#endif /* PNG_NO_WRITE_FILTER */
|
||||
#endif /* PNG_WRITE_FILTER_SUPPORTED */
|
||||
case PNG_FILTER_VALUE_NONE:
|
||||
png_ptr->do_filter=PNG_FILTER_NONE; break;
|
||||
png_ptr->do_filter = PNG_FILTER_NONE; break;
|
||||
#ifndef PNG_NO_WRITE_FILTER
|
||||
case PNG_FILTER_VALUE_SUB:
|
||||
png_ptr->do_filter=PNG_FILTER_SUB; break;
|
||||
png_ptr->do_filter = PNG_FILTER_SUB; break;
|
||||
case PNG_FILTER_VALUE_UP:
|
||||
png_ptr->do_filter=PNG_FILTER_UP; break;
|
||||
png_ptr->do_filter = PNG_FILTER_UP; break;
|
||||
case PNG_FILTER_VALUE_AVG:
|
||||
png_ptr->do_filter=PNG_FILTER_AVG; break;
|
||||
png_ptr->do_filter = PNG_FILTER_AVG; break;
|
||||
case PNG_FILTER_VALUE_PAETH:
|
||||
png_ptr->do_filter=PNG_FILTER_PAETH; break;
|
||||
png_ptr->do_filter = PNG_FILTER_PAETH; break;
|
||||
default: png_ptr->do_filter = (png_byte)filters; break;
|
||||
#else
|
||||
default: png_warning(png_ptr, "Unknown row filter for method 0");
|
||||
#endif /* PNG_NO_WRITE_FILTER */
|
||||
#endif /* PNG_WRITE_FILTER_SUPPORTED */
|
||||
}
|
||||
|
||||
/* If we have allocated the row_buf, this means we have already started
|
||||
|
|
@ -1255,7 +1274,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
|
|||
}
|
||||
|
||||
if (png_ptr->do_filter == PNG_NO_FILTERS)
|
||||
#endif /* PNG_NO_WRITE_FILTER */
|
||||
#endif /* PNG_WRITE_FILTER_SUPPORTED */
|
||||
png_ptr->do_filter = PNG_FILTER_NONE;
|
||||
}
|
||||
}
|
||||
|
|
@ -1270,7 +1289,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
|
|||
* filtered data going to zlib more consistent, hopefully resulting in
|
||||
* better compression.
|
||||
*/
|
||||
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* GRR 970116 */
|
||||
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
|
||||
void PNGAPI
|
||||
png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
|
||||
int num_weights, png_doublep filter_weights,
|
||||
|
|
@ -1279,6 +1298,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
|
|||
int i;
|
||||
|
||||
png_debug(1, "in png_set_filter_heuristics");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
|
||||
|
|
@ -1393,6 +1413,7 @@ void PNGAPI
|
|||
png_set_compression_level(png_structp png_ptr, int level)
|
||||
{
|
||||
png_debug(1, "in png_set_compression_level");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
|
||||
|
|
@ -1403,6 +1424,7 @@ void PNGAPI
|
|||
png_set_compression_mem_level(png_structp png_ptr, int mem_level)
|
||||
{
|
||||
png_debug(1, "in png_set_compression_mem_level");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
|
||||
|
|
@ -1413,6 +1435,7 @@ void PNGAPI
|
|||
png_set_compression_strategy(png_structp png_ptr, int strategy)
|
||||
{
|
||||
png_debug(1, "in png_set_compression_strategy");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
|
||||
|
|
@ -1433,7 +1456,7 @@ png_set_compression_window_bits(png_structp png_ptr, int window_bits)
|
|||
if (window_bits == 8)
|
||||
{
|
||||
png_warning(png_ptr, "Compression window is being reset to 512");
|
||||
window_bits=9;
|
||||
window_bits = 9;
|
||||
}
|
||||
#endif
|
||||
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS;
|
||||
|
|
@ -1444,6 +1467,7 @@ void PNGAPI
|
|||
png_set_compression_method(png_structp png_ptr, int method)
|
||||
{
|
||||
png_debug(1, "in png_set_compression_method");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
if (method != 8)
|
||||
|
|
@ -1460,12 +1484,13 @@ png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
|
|||
png_ptr->write_row_fn = write_row_fn;
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
|
||||
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
|
||||
write_user_transform_fn)
|
||||
{
|
||||
png_debug(1, "in png_set_write_user_transform_fn");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_ptr->transformations |= PNG_USER_TRANSFORM;
|
||||
|
|
@ -1474,14 +1499,14 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
|
|||
#endif
|
||||
|
||||
|
||||
#if defined(PNG_INFO_IMAGE_SUPPORTED)
|
||||
#ifdef PNG_INFO_IMAGE_SUPPORTED
|
||||
void PNGAPI
|
||||
png_write_png(png_structp png_ptr, png_infop info_ptr,
|
||||
int transforms, voidp params)
|
||||
{
|
||||
if (png_ptr == NULL || info_ptr == NULL)
|
||||
return;
|
||||
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
||||
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
|
||||
/* Invert the alpha channel from opacity to transparency */
|
||||
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
|
||||
png_set_invert_alpha(png_ptr);
|
||||
|
|
@ -1492,13 +1517,13 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
|
|||
|
||||
/* ------ these transformations don't touch the info structure ------- */
|
||||
|
||||
#if defined(PNG_WRITE_INVERT_SUPPORTED)
|
||||
#ifdef PNG_WRITE_INVERT_SUPPORTED
|
||||
/* Invert monochrome pixels */
|
||||
if (transforms & PNG_TRANSFORM_INVERT_MONO)
|
||||
png_set_invert_mono(png_ptr);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
#ifdef PNG_WRITE_SHIFT_SUPPORTED
|
||||
/* Shift the pixels up to a legal bit depth and fill in
|
||||
* as appropriate to correctly scale the image.
|
||||
*/
|
||||
|
|
@ -1507,19 +1532,19 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
|
|||
png_set_shift(png_ptr, &info_ptr->sig_bit);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
#ifdef PNG_WRITE_PACK_SUPPORTED
|
||||
/* Pack pixels into bytes */
|
||||
if (transforms & PNG_TRANSFORM_PACKING)
|
||||
png_set_packing(png_ptr);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
|
||||
/* Swap location of alpha bytes from ARGB to RGBA */
|
||||
if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
|
||||
png_set_swap_alpha(png_ptr);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_FILLER_SUPPORTED)
|
||||
#ifdef PNG_WRITE_FILLER_SUPPORTED
|
||||
/* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
|
||||
if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
|
||||
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
|
||||
|
|
@ -1527,19 +1552,19 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
|
|||
png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
#ifdef PNG_WRITE_BGR_SUPPORTED
|
||||
/* Flip BGR pixels to RGB */
|
||||
if (transforms & PNG_TRANSFORM_BGR)
|
||||
png_set_bgr(png_ptr);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
#ifdef PNG_WRITE_SWAP_SUPPORTED
|
||||
/* Swap bytes of 16-bit files to most significant byte first */
|
||||
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
|
||||
png_set_swap(png_ptr);
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
|
||||
/* Swap bits of 1, 2, 4 bit packed pixel formats */
|
||||
if (transforms & PNG_TRANSFORM_PACKSWAP)
|
||||
png_set_packswap(png_ptr);
|
||||
|
|
|
|||
Reference in New Issue