void save_as_png(T1 & file,
T2 const& image,
png_options const& opts)
{
png_voidp error_ptr=0;
png_structp png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING,
error_ptr,0, 0);
if (!png_ptr) return;
// switch on optimization only if supported
#if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 mask, flags;
flags = png_get_asm_flags(png_ptr);
mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(png_ptr, flags | mask);
#endif
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_FILTER_NONE);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,static_cast<png_infopp>(0));
return;
}
jmp_buf* jmp_context = static_cast<jmp_buf*>(png_get_error_ptr(png_ptr));
if (jmp_context)
{
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_set_write_fn (png_ptr, &file, &write_data<T1>, &flush_data<T1>);
png_set_compression_level(png_ptr, opts.compression);
png_set_compression_strategy(png_ptr, opts.strategy);
png_set_compression_buffer_size(png_ptr, 32768);
png_set_IHDR(png_ptr, info_ptr,image.width(),image.height(),8,
(opts.trans_mode == 0) ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA,PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
const std::unique_ptr<png_bytep[]> row_pointers(new png_bytep[image.height()]);
for (unsigned int i = 0; i < image.height(); i++)
{
row_pointers[i] = const_cast<png_bytep>(reinterpret_cast<const unsigned char *>(image.get_row(i)));
}
png_set_rows(png_ptr, info_ptr, row_pointers.get());
png_write_png(png_ptr, info_ptr, (opts.trans_mode == 0) ? PNG_TRANSFORM_STRIP_FILLER_AFTER : PNG_TRANSFORM_IDENTITY, nullptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
void save_as_png(T1 & file , T2 const& image, int compression = Z_DEFAULT_COMPRESSION, int strategy = Z_DEFAULT_STRATEGY)
{
png_voidp error_ptr=0;
png_structp png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING,
error_ptr,0, 0);
if (!png_ptr) return;
// switch on optimization only if supported
#if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 mask, flags;
flags = png_get_asm_flags(png_ptr);
mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(png_ptr, flags | mask);
#endif
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_FILTER_NONE);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,(png_infopp)0);
return;
}
jmp_buf* jmp_context = (jmp_buf*) png_get_error_ptr(png_ptr);
if (jmp_context)
{
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_set_write_fn (png_ptr, &file, &write_data<T1>, &flush_data<T1>);
png_set_compression_level(png_ptr, compression);
png_set_compression_strategy(png_ptr, strategy);
png_set_compression_buffer_size(png_ptr, 32768);
png_set_IHDR(png_ptr, info_ptr,image.width(),image.height(),8,
PNG_COLOR_TYPE_RGB_ALPHA,PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
png_write_info(png_ptr, info_ptr);
for (unsigned i=0;i<image.height();i++)
{
png_write_row(png_ptr,(png_bytep)image.getRow(i));
}
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
void save_as_png(T & file, std::vector<mapnik::rgb> const& palette,
mapnik::image_gray8 const& image,
unsigned width,
unsigned height,
unsigned color_depth,
std::vector<unsigned> const&alpha,
png_options const& opts)
{
png_voidp error_ptr=0;
png_structp png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING,
error_ptr,0, 0);
if (!png_ptr)
{
return;
}
// switch on optimization only if supported
#if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 mask, flags;
flags = png_get_asm_flags(png_ptr);
mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(png_ptr, flags | mask);
#endif
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_FILTER_NONE);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,static_cast<png_infopp>(0));
return;
}
jmp_buf* jmp_context = static_cast<jmp_buf*>(png_get_error_ptr(png_ptr));
if (jmp_context)
{
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_set_write_fn (png_ptr, &file, &write_data<T>, &flush_data<T>);
png_set_compression_level(png_ptr, opts.compression);
png_set_compression_strategy(png_ptr, opts.strategy);
png_set_compression_buffer_size(png_ptr, 32768);
png_set_IHDR(png_ptr, info_ptr,width,height,color_depth,
PNG_COLOR_TYPE_PALETTE,PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
png_color* pal = const_cast<png_color*>(reinterpret_cast<const png_color*>(&palette[0]));
png_set_PLTE(png_ptr, info_ptr, pal, static_cast<unsigned>(palette.size()));
// make transparent lowest indexes, so tRNS is small
if (alpha.size()>0)
{
std::vector<png_byte> trans(alpha.size());
unsigned alphaSize=0;//truncate to nonopaque values
for(unsigned i=0; i < alpha.size(); i++)
{
trans[i]=alpha[i];
if (alpha[i]<255)
{
alphaSize = i+1;
}
}
if (alphaSize>0)
{
png_set_tRNS(png_ptr, info_ptr, static_cast<png_bytep>(&trans[0]), alphaSize, 0);
}
}
png_write_info(png_ptr, info_ptr);
for (unsigned i=0;i<height;i++)
{
png_write_row(png_ptr,const_cast<png_bytep>(image.get_row(i)));
}
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
void save_as_png(T1 & file,
T2 const& image,
int compression = Z_DEFAULT_COMPRESSION,
int strategy = Z_DEFAULT_STRATEGY,
int alpha = false,
bool use_miniz = false)
{
if (use_miniz) {
MiniZ::PNGWriter writer(compression);
if (alpha) {
writer.writeIHDR(image.width(), image.height(), 32);
writer.writeIDAT(image);
} else {
writer.writeIHDR(image.width(), image.height(), 24);
writer.writeIDATStripAlpha(image);
}
writer.writeIEND();
writer.toStream(file);
return;
}
png_voidp error_ptr=0;
png_structp png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING,
error_ptr,0, 0);
if (!png_ptr) return;
// switch on optimization only if supported
#if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 mask, flags;
flags = png_get_asm_flags(png_ptr);
mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(png_ptr, flags | mask);
#endif
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_FILTER_NONE);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,(png_infopp)0);
return;
}
jmp_buf* jmp_context = (jmp_buf*) png_get_error_ptr(png_ptr);
if (jmp_context)
{
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_set_write_fn (png_ptr, &file, &write_data<T1>, &flush_data<T1>);
png_set_compression_level(png_ptr, compression);
png_set_compression_strategy(png_ptr, strategy);
png_set_compression_buffer_size(png_ptr, 32768);
png_set_IHDR(png_ptr, info_ptr, image.width(), image.height(), 8,
alpha ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_bytep row_pointers[image.height()];
for (unsigned int i = 0; i < image.height(); i++) {
row_pointers[i] = (png_bytep)image.getRow(i);
}
png_set_rows(png_ptr, info_ptr, (png_bytepp)&row_pointers);
png_write_png(png_ptr, info_ptr, alpha ? PNG_TRANSFORM_IDENTITY : PNG_TRANSFORM_STRIP_FILLER_AFTER, NULL);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
void save_as_png(T & file, std::vector<rgb> const& palette,
image_data_8 const& image,
unsigned width,
unsigned height,
unsigned color_depth,
int compression,
int strategy,
std::vector<unsigned> const&alpha,
bool use_miniz)
{
if (use_miniz) {
MiniZ::PNGWriter writer(compression);
// image.width()/height() does not reflect the actual image dimensions; it
// refers to the quantized scanlines.
writer.writeIHDR(width, height, color_depth);
writer.writePLTE(palette);
writer.writetRNS(alpha);
writer.writeIDAT(image);
writer.writeIEND();
writer.toStream(file);
return;
}
png_voidp error_ptr=0;
png_structp png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING,
error_ptr,0, 0);
if (!png_ptr) return;
// switch on optimization only if supported
#if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 mask, flags;
flags = png_get_asm_flags(png_ptr);
mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(png_ptr, flags | mask);
#endif
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_FILTER_NONE);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,(png_infopp)0);
return;
}
jmp_buf* jmp_context = (jmp_buf*) png_get_error_ptr(png_ptr);
if (jmp_context)
{
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_set_write_fn (png_ptr, &file, &write_data<T>, &flush_data<T>);
png_set_compression_level(png_ptr, compression);
png_set_compression_strategy(png_ptr, strategy);
png_set_compression_buffer_size(png_ptr, 32768);
png_set_IHDR(png_ptr, info_ptr,width,height,color_depth,
PNG_COLOR_TYPE_PALETTE,PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
png_color* pal = const_cast<png_color*>(reinterpret_cast<const png_color*>(&palette[0]));
png_set_PLTE(png_ptr, info_ptr, pal, palette.size());
// make transparent lowest indexes, so tRNS is small
if (alpha.size()>0)
{
std::vector<png_byte> trans(alpha.size());
unsigned alphaSize=0;//truncate to nonopaque values
for(unsigned i=0; i < alpha.size(); i++)
{
trans[i]=alpha[i];
if (alpha[i]<255)
alphaSize = i+1;
}
if (alphaSize>0)
png_set_tRNS(png_ptr, info_ptr, (png_bytep)&trans[0], alphaSize, 0);
}
png_write_info(png_ptr, info_ptr);
for (unsigned i=0; i<height; i++)
{
png_write_row(png_ptr,(png_bytep)image.getRow(i));
}
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
// ######################################################################
PngParser::PngParser(const char* filename)
:
rep(new Rep(filename))
{
errno = 0;
rep->file = fopen(filename, "rb");
if (rep->file == 0) rep->onError("couldn't open file for png reading");
const size_t nheader = 8;
png_byte header[nheader];
if (fread(header, 1, nheader, rep->file) != nheader) rep->onError("short read on png file header");
int is_png = !png_sig_cmp(header, 0, nheader);
if (!is_png) rep->onError("file was not a png image file");
rep->pngPtr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
if (rep->pngPtr == 0) rep->onError("png_create_read_struct failed");
rep->infoPtr = png_create_info_struct(rep->pngPtr);
if (rep->infoPtr == 0) rep->onError("png_create_info_struct failed");
rep->endPtr = png_create_info_struct(rep->pngPtr);
if (rep->endPtr == 0) rep->onError("png_create_info_struct failed");
png_init_io(rep->pngPtr, rep->file);
png_set_sig_bytes(rep->pngPtr, nheader);
png_read_info(rep->pngPtr, rep->infoPtr);
rep->bitDepth = png_get_bit_depth(rep->pngPtr, rep->infoPtr);
rep->colorType = png_get_color_type(rep->pngPtr, rep->infoPtr);
if (rep->bitDepth == 16)
png_set_strip_16(rep->pngPtr);
else if (rep->bitDepth < 8 && (rep->colorType == PNG_COLOR_TYPE_GRAY))
png_set_gray_1_2_4_to_8(rep->pngPtr);
else if (rep->bitDepth != 8 && (rep->colorType != PNG_COLOR_TYPE_PALETTE))
rep->onError(sformat("invalid bit-depth(%d)/color-mode(%d) "
"combination", rep->bitDepth, rep->colorType));
// Strip out the alpha channel, if present
if (rep->colorType & PNG_COLOR_MASK_ALPHA)
png_set_strip_alpha(rep->pngPtr);
if (rep->colorType & PNG_COLOR_MASK_PALETTE)
png_set_palette_to_rgb(rep->pngPtr);
// This must come after any+all transformations are specified
png_read_update_info(rep->pngPtr, rep->infoPtr);
// These calls must come after png_read_update_info, so that we get
// values that reflect any transformations
rep->width = png_get_image_width(rep->pngPtr, rep->infoPtr);
rep->height = png_get_image_height(rep->pngPtr, rep->infoPtr);
rep->rowBytes = png_get_rowbytes(rep->pngPtr, rep->infoPtr);
rep->numChannels = png_get_channels(rep->pngPtr, rep->infoPtr);
ASSERT(rep->rowBytes = rep->width*rep->numChannels);
// run-time mmx PNG optimizations (nate)
#if defined(HAVE_PNG_ASM_FLAGS)
const png_uint_32 flags = png_get_asm_flags(rep->pngPtr);
const png_uint_32 mask =
png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(rep->pngPtr, flags | mask);
#endif
}
void save_as_png(T & file, std::vector<mapnik::rgb> & palette,
mapnik::image_data_8 const& image,
unsigned width,
unsigned height,
unsigned color_depth,
std::vector<unsigned> &alpha)
{
png_voidp error_ptr=0;
png_structp png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING,
error_ptr,0, 0);
if (!png_ptr) return;
// switch on optimization only if supported
#if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
png_uint_32 mask, flags;
flags = png_get_asm_flags(png_ptr);
mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
png_set_asm_flags(png_ptr, flags | mask);
#endif
png_set_filter (png_ptr, 0, PNG_FILTER_NONE);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr,(png_infopp)0);
return;
}
if (setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_set_write_fn (png_ptr, &file, &write_data<T>, &flush_data<T>);
png_set_IHDR(png_ptr, info_ptr,width,height,color_depth,
PNG_COLOR_TYPE_PALETTE,PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
png_set_PLTE(png_ptr,info_ptr,reinterpret_cast<png_color*>(&palette[0]),palette.size());
// make transparent lowest indexes, so tRNS is small
if (alpha.size()>0)
{
std::vector<png_byte> trans(alpha.size());
unsigned alphaSize=0;//truncate to nonopaque values
for(unsigned i=0; i < alpha.size(); i++)
{
trans[i]=alpha[i];
if (alpha[i]<255)
alphaSize = i+1;
}
if (alphaSize>0)
png_set_tRNS(png_ptr, info_ptr, (png_bytep)&trans[0], alphaSize, 0);
}
png_write_info(png_ptr, info_ptr);
for (unsigned i=0;i<height;i++)
{
png_write_row(png_ptr,(png_bytep)image.getRow(i));
}
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
}
