juicysfplugin/modules/juce_graphics/image_formats/juce_PNGLoader.cpp

609 lines
19 KiB
C++

/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2017 - ROLI Ltd.
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 5 End-User License
Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
27th April 2017).
End User License Agreement: www.juce.com/juce-5-licence
Privacy Policy: www.juce.com/juce-5-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
#if JUCE_MSVC
#pragma warning (push)
#pragma warning (disable: 4390 4611 4365 4267)
#ifdef __INTEL_COMPILER
#pragma warning (disable: 2544 2545)
#endif
#endif
namespace zlibNamespace
{
#if JUCE_INCLUDE_ZLIB_CODE
#undef OS_CODE
#undef fdopen
#include "../../juce_core/zip/zlib/zlib.h"
#undef OS_CODE
#else
#include JUCE_ZLIB_INCLUDE_PATH
#endif
}
#if ! defined (jmp_buf) || ! defined (longjmp)
#include <setjmp.h>
#endif
namespace pnglibNamespace
{
using namespace zlibNamespace;
#if JUCE_INCLUDE_PNGLIB_CODE || ! defined (JUCE_INCLUDE_PNGLIB_CODE)
#if _MSC_VER != 1310
using std::calloc; // (causes conflict in VS.NET 2003)
using std::malloc;
using std::free;
#endif
#if JUCE_CLANG
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wsign-conversion"
#if __has_warning("-Wzero-as-null-pointer-constant")
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif
#if __has_warning("-Wcomma")
#pragma clang diagnostic ignored "-Wcomma"
#endif
#endif
#undef check
using std::abs;
#define NO_DUMMY_DECL
#define PNGLCONF_H 1
#if JUCE_ANDROID
#define PNG_ARM_NEON_SUPPORTED
#endif
#define PNG_16BIT_SUPPORTED
#define PNG_ALIGNED_MEMORY_SUPPORTED
#define PNG_BENIGN_ERRORS_SUPPORTED
#define PNG_BENIGN_READ_ERRORS_SUPPORTED
#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
#define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_COLORSPACE_SUPPORTED
#define PNG_CONSOLE_IO_SUPPORTED
#define PNG_EASY_ACCESS_SUPPORTED
#define PNG_FIXED_POINT_SUPPORTED
#define PNG_FLOATING_ARITHMETIC_SUPPORTED
#define PNG_FLOATING_POINT_SUPPORTED
#define PNG_FORMAT_AFIRST_SUPPORTED
#define PNG_FORMAT_BGR_SUPPORTED
#define PNG_GAMMA_SUPPORTED
#define PNG_GET_PALETTE_MAX_SUPPORTED
#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
#define PNG_INCH_CONVERSIONS_SUPPORTED
#define PNG_INFO_IMAGE_SUPPORTED
#define PNG_IO_STATE_SUPPORTED
#define PNG_MNG_FEATURES_SUPPORTED
#define PNG_POINTER_INDEXING_SUPPORTED
#define PNG_PROGRESSIVE_READ_SUPPORTED
#define PNG_READ_16BIT_SUPPORTED
#define PNG_READ_ALPHA_MODE_SUPPORTED
#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
#define PNG_READ_BACKGROUND_SUPPORTED
#define PNG_READ_BGR_SUPPORTED
#define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
#define PNG_READ_COMPRESSED_TEXT_SUPPORTED
#define PNG_READ_EXPAND_16_SUPPORTED
#define PNG_READ_EXPAND_SUPPORTED
#define PNG_READ_FILLER_SUPPORTED
#define PNG_READ_GAMMA_SUPPORTED
#define PNG_READ_GET_PALETTE_MAX_SUPPORTED
#define PNG_READ_GRAY_TO_RGB_SUPPORTED
#define PNG_READ_INTERLACING_SUPPORTED
#define PNG_READ_INT_FUNCTIONS_SUPPORTED
#define PNG_READ_INVERT_ALPHA_SUPPORTED
#define PNG_READ_INVERT_SUPPORTED
#define PNG_READ_OPT_PLTE_SUPPORTED
#define PNG_READ_PACKSWAP_SUPPORTED
#define PNG_READ_PACK_SUPPORTED
#define PNG_READ_QUANTIZE_SUPPORTED
#define PNG_READ_RGB_TO_GRAY_SUPPORTED
#define PNG_READ_SCALE_16_TO_8_SUPPORTED
#define PNG_READ_SHIFT_SUPPORTED
#define PNG_READ_STRIP_16_TO_8_SUPPORTED
#define PNG_READ_STRIP_ALPHA_SUPPORTED
#define PNG_READ_SUPPORTED
#define PNG_READ_SWAP_ALPHA_SUPPORTED
#define PNG_READ_SWAP_SUPPORTED
#define PNG_READ_TEXT_SUPPORTED
#define PNG_READ_TRANSFORMS_SUPPORTED
#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_READ_USER_CHUNKS_SUPPORTED
#define PNG_READ_USER_TRANSFORM_SUPPORTED
#define PNG_READ_bKGD_SUPPORTED
#define PNG_READ_cHRM_SUPPORTED
#define PNG_READ_gAMA_SUPPORTED
#define PNG_READ_hIST_SUPPORTED
#define PNG_READ_iCCP_SUPPORTED
#define PNG_READ_iTXt_SUPPORTED
#define PNG_READ_oFFs_SUPPORTED
#define PNG_READ_pCAL_SUPPORTED
#define PNG_READ_pHYs_SUPPORTED
#define PNG_READ_sBIT_SUPPORTED
#define PNG_READ_sCAL_SUPPORTED
#define PNG_READ_sPLT_SUPPORTED
#define PNG_READ_sRGB_SUPPORTED
#define PNG_READ_tEXt_SUPPORTED
#define PNG_READ_tIME_SUPPORTED
#define PNG_READ_tRNS_SUPPORTED
#define PNG_READ_zTXt_SUPPORTED
#define PNG_SAVE_INT_32_SUPPORTED
#define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_SEQUENTIAL_READ_SUPPORTED
#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
#define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_SET_USER_LIMITS_SUPPORTED
#define PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
#define PNG_SIMPLIFIED_READ_BGR_SUPPORTED
#define PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
#define PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED
#define PNG_STDIO_SUPPORTED
#define PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_TEXT_SUPPORTED
#define PNG_TIME_RFC1123_SUPPORTED
#define PNG_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_USER_CHUNKS_SUPPORTED
#define PNG_USER_LIMITS_SUPPORTED
#define PNG_USER_TRANSFORM_INFO_SUPPORTED
#define PNG_USER_TRANSFORM_PTR_SUPPORTED
#define PNG_WARNINGS_SUPPORTED
#define PNG_WRITE_16BIT_SUPPORTED
#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
#define PNG_WRITE_BGR_SUPPORTED
#define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
#define PNG_WRITE_FILLER_SUPPORTED
#define PNG_WRITE_FILTER_SUPPORTED
#define PNG_WRITE_FLUSH_SUPPORTED
#define PNG_WRITE_GET_PALETTE_MAX_SUPPORTED
#define PNG_WRITE_INTERLACING_SUPPORTED
#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
#define PNG_WRITE_INVERT_SUPPORTED
#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
#define PNG_WRITE_PACKSWAP_SUPPORTED
#define PNG_WRITE_PACK_SUPPORTED
#define PNG_WRITE_SHIFT_SUPPORTED
#define PNG_WRITE_SUPPORTED
#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
#define PNG_WRITE_SWAP_SUPPORTED
#define PNG_WRITE_TEXT_SUPPORTED
#define PNG_WRITE_TRANSFORMS_SUPPORTED
#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#define PNG_WRITE_bKGD_SUPPORTED
#define PNG_WRITE_cHRM_SUPPORTED
#define PNG_WRITE_gAMA_SUPPORTED
#define PNG_WRITE_hIST_SUPPORTED
#define PNG_WRITE_iCCP_SUPPORTED
#define PNG_WRITE_iTXt_SUPPORTED
#define PNG_WRITE_oFFs_SUPPORTED
#define PNG_WRITE_pCAL_SUPPORTED
#define PNG_WRITE_pHYs_SUPPORTED
#define PNG_WRITE_sBIT_SUPPORTED
#define PNG_WRITE_sCAL_SUPPORTED
#define PNG_WRITE_sPLT_SUPPORTED
#define PNG_WRITE_sRGB_SUPPORTED
#define PNG_WRITE_tEXt_SUPPORTED
#define PNG_WRITE_tIME_SUPPORTED
#define PNG_WRITE_tRNS_SUPPORTED
#define PNG_WRITE_zTXt_SUPPORTED
#define PNG_bKGD_SUPPORTED
#define PNG_cHRM_SUPPORTED
#define PNG_gAMA_SUPPORTED
#define PNG_hIST_SUPPORTED
#define PNG_iCCP_SUPPORTED
#define PNG_iTXt_SUPPORTED
#define PNG_oFFs_SUPPORTED
#define PNG_pCAL_SUPPORTED
#define PNG_pHYs_SUPPORTED
#define PNG_sBIT_SUPPORTED
#define PNG_sCAL_SUPPORTED
#define PNG_sPLT_SUPPORTED
#define PNG_sRGB_SUPPORTED
#define PNG_tEXt_SUPPORTED
#define PNG_tIME_SUPPORTED
#define PNG_tRNS_SUPPORTED
#define PNG_zTXt_SUPPORTED
#define PNG_STRING_COPYRIGHT "";
#define PNG_STRING_NEWLINE "\n"
#define PNG_LITERAL_SHARP 0x23
#define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
#define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
#define PNG_API_RULE 0
#define PNG_CALLOC_SUPPORTED
#define PNG_COST_SHIFT 3
#define PNG_DEFAULT_READ_MACROS 1
#define PNG_GAMMA_THRESHOLD_FIXED 5000
#define PNG_IDAT_READ_SIZE PNG_ZBUF_SIZE
#define PNG_INFLATE_BUF_SIZE 1024
#define PNG_MAX_GAMMA_8 11
#define PNG_QUANTIZE_BLUE_BITS 5
#define PNG_QUANTIZE_GREEN_BITS 5
#define PNG_QUANTIZE_RED_BITS 5
#define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1)
#define PNG_TEXT_Z_DEFAULT_STRATEGY 0
#define PNG_WEIGHT_SHIFT 8
#define PNG_ZBUF_SIZE 8192
#define PNG_Z_DEFAULT_COMPRESSION (-1)
#define PNG_Z_DEFAULT_NOFILTER_STRATEGY 0
#define PNG_Z_DEFAULT_STRATEGY 1
#define PNG_sCAL_PRECISION 5
#define PNG_sRGB_PROFILE_CHECKS 2
#define png_debug(a, b)
#define png_debug1(a, b, c)
#define png_debug2(a, b, c, d)
#include "pnglib/png.h"
#include "pnglib/pngconf.h"
#define PNG_NO_EXTERN
#include "pnglib/png.c"
#include "pnglib/pngerror.c"
#include "pnglib/pngget.c"
#include "pnglib/pngmem.c"
#include "pnglib/pngread.c"
#include "pnglib/pngpread.c"
#include "pnglib/pngrio.c"
#include "pnglib/pngrtran.c"
#include "pnglib/pngrutil.c"
#include "pnglib/pngset.c"
#include "pnglib/pngtrans.c"
#include "pnglib/pngwio.c"
#include "pnglib/pngwrite.c"
#include "pnglib/pngwtran.c"
#include "pnglib/pngwutil.c"
#if JUCE_CLANG
#pragma clang diagnostic pop
#endif
#else
extern "C"
{
#include <png.h>
#include <pngconf.h>
}
#endif
}
#undef max
#undef min
#undef fdopen
#if JUCE_MSVC
#pragma warning (pop)
#endif
//==============================================================================
namespace PNGHelpers
{
using namespace pnglibNamespace;
static void JUCE_CDECL writeDataCallback (png_structp png, png_bytep data, png_size_t length)
{
static_cast<OutputStream*> (png_get_io_ptr (png))->write (data, length);
}
#if ! JUCE_USING_COREIMAGE_LOADER
static void JUCE_CDECL readCallback (png_structp png, png_bytep data, png_size_t length)
{
static_cast<InputStream*> (png_get_io_ptr (png))->read (data, (int) length);
}
struct PNGErrorStruct {};
static void JUCE_CDECL errorCallback (png_structp p, png_const_charp)
{
#ifdef PNG_SETJMP_SUPPORTED
setjmp(png_jmpbuf(p));
#else
longjmp (*(jmp_buf*) p->error_ptr, 1);
#endif
}
static void JUCE_CDECL warningCallback (png_structp, png_const_charp) {}
#if JUCE_MSVC
#pragma warning (push)
#pragma warning (disable: 4611) // (warning about setjmp)
#endif
static bool readHeader (InputStream& in, png_structp pngReadStruct, png_infop pngInfoStruct, jmp_buf& errorJumpBuf,
png_uint_32& width, png_uint_32& height, int& bitDepth, int& colorType, int& interlaceType) noexcept
{
if (setjmp (errorJumpBuf) == 0)
{
// read the header..
png_set_read_fn (pngReadStruct, &in, readCallback);
png_read_info (pngReadStruct, pngInfoStruct);
png_get_IHDR (pngReadStruct, pngInfoStruct,
&width, &height,
&bitDepth, &colorType,
&interlaceType, 0, 0);
if (bitDepth == 16)
png_set_strip_16 (pngReadStruct);
if (colorType == PNG_COLOR_TYPE_PALETTE)
png_set_expand (pngReadStruct);
if (bitDepth < 8)
png_set_expand (pngReadStruct);
if (colorType == PNG_COLOR_TYPE_GRAY || colorType == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb (pngReadStruct);
return true;
}
return false;
}
static bool readImageData (png_structp pngReadStruct, png_infop pngInfoStruct, jmp_buf& errorJumpBuf, png_bytepp rows) noexcept
{
if (setjmp (errorJumpBuf) == 0)
{
if (png_get_valid (pngReadStruct, pngInfoStruct, PNG_INFO_tRNS))
png_set_expand (pngReadStruct);
png_set_add_alpha (pngReadStruct, 0xff, PNG_FILLER_AFTER);
png_read_image (pngReadStruct, rows);
png_read_end (pngReadStruct, pngInfoStruct);
return true;
}
return false;
}
#if JUCE_MSVC
#pragma warning (pop)
#endif
static Image createImageFromData (bool hasAlphaChan, int width, int height, png_bytepp rows)
{
// now convert the data to a juce image format..
Image image (hasAlphaChan ? Image::ARGB : Image::RGB, width, height, hasAlphaChan);
image.getProperties()->set ("originalImageHadAlpha", image.hasAlphaChannel());
hasAlphaChan = image.hasAlphaChannel(); // (the native image creator may not give back what we expect)
const Image::BitmapData destData (image, Image::BitmapData::writeOnly);
for (int y = 0; y < (int) height; ++y)
{
const uint8* src = rows[y];
uint8* dest = destData.getLinePointer (y);
if (hasAlphaChan)
{
for (int i = (int) width; --i >= 0;)
{
((PixelARGB*) dest)->setARGB (src[3], src[0], src[1], src[2]);
((PixelARGB*) dest)->premultiply();
dest += destData.pixelStride;
src += 4;
}
}
else
{
for (int i = (int) width; --i >= 0;)
{
((PixelRGB*) dest)->setARGB (0, src[0], src[1], src[2]);
dest += destData.pixelStride;
src += 4;
}
}
}
return image;
}
static Image readImage (InputStream& in, png_structp pngReadStruct, png_infop pngInfoStruct)
{
jmp_buf errorJumpBuf;
png_set_error_fn (pngReadStruct, &errorJumpBuf, errorCallback, warningCallback);
png_uint_32 width = 0, height = 0;
int bitDepth = 0, colorType = 0, interlaceType = 0;
if (readHeader (in, pngReadStruct, pngInfoStruct, errorJumpBuf,
width, height, bitDepth, colorType, interlaceType))
{
// Load the image into a temp buffer..
const size_t lineStride = width * 4;
HeapBlock<uint8> tempBuffer (height * lineStride);
HeapBlock<png_bytep> rows (height);
for (size_t y = 0; y < height; ++y)
rows[y] = (png_bytep) (tempBuffer + lineStride * y);
png_bytep trans_alpha = nullptr;
png_color_16p trans_color = nullptr;
int num_trans = 0;
png_get_tRNS (pngReadStruct, pngInfoStruct, &trans_alpha, &num_trans, &trans_color);
if (readImageData (pngReadStruct, pngInfoStruct, errorJumpBuf, rows))
return createImageFromData ((colorType & PNG_COLOR_MASK_ALPHA) != 0 || num_trans != 0,
(int) width, (int) height, rows);
}
return Image();
}
static Image readImage (InputStream& in)
{
if (png_structp pngReadStruct = png_create_read_struct (PNG_LIBPNG_VER_STRING, 0, 0, 0))
{
if (png_infop pngInfoStruct = png_create_info_struct (pngReadStruct))
{
Image image (readImage (in, pngReadStruct, pngInfoStruct));
png_destroy_read_struct (&pngReadStruct, &pngInfoStruct, 0);
return image;
}
png_destroy_read_struct (&pngReadStruct, 0, 0);
}
return Image();
}
#endif
}
//==============================================================================
PNGImageFormat::PNGImageFormat() {}
PNGImageFormat::~PNGImageFormat() {}
String PNGImageFormat::getFormatName() { return "PNG"; }
bool PNGImageFormat::usesFileExtension (const File& f) { return f.hasFileExtension ("png"); }
bool PNGImageFormat::canUnderstand (InputStream& in)
{
const int bytesNeeded = 4;
char header [bytesNeeded];
return in.read (header, bytesNeeded) == bytesNeeded
&& header[1] == 'P'
&& header[2] == 'N'
&& header[3] == 'G';
}
#if JUCE_USING_COREIMAGE_LOADER
Image juce_loadWithCoreImage (InputStream&);
#endif
Image PNGImageFormat::decodeImage (InputStream& in)
{
#if JUCE_USING_COREIMAGE_LOADER
return juce_loadWithCoreImage (in);
#else
return PNGHelpers::readImage (in);
#endif
}
bool PNGImageFormat::writeImageToStream (const Image& image, OutputStream& out)
{
using namespace pnglibNamespace;
auto width = image.getWidth();
auto height = image.getHeight();
auto pngWriteStruct = png_create_write_struct (PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
if (pngWriteStruct == nullptr)
return false;
auto pngInfoStruct = png_create_info_struct (pngWriteStruct);
if (pngInfoStruct == nullptr)
{
png_destroy_write_struct (&pngWriteStruct, nullptr);
return false;
}
png_set_write_fn (pngWriteStruct, &out, PNGHelpers::writeDataCallback, nullptr);
png_set_IHDR (pngWriteStruct, pngInfoStruct, (png_uint_32) width, (png_uint_32) height, 8,
image.hasAlphaChannel() ? PNG_COLOR_TYPE_RGB_ALPHA
: PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE,
PNG_FILTER_TYPE_BASE);
HeapBlock<uint8> rowData (width * 4);
png_color_8 sig_bit;
sig_bit.red = 8;
sig_bit.green = 8;
sig_bit.blue = 8;
sig_bit.gray = 0;
sig_bit.alpha = 8;
png_set_sBIT (pngWriteStruct, pngInfoStruct, &sig_bit);
png_write_info (pngWriteStruct, pngInfoStruct);
png_set_shift (pngWriteStruct, &sig_bit);
png_set_packing (pngWriteStruct);
const Image::BitmapData srcData (image, Image::BitmapData::readOnly);
for (int y = 0; y < height; ++y)
{
uint8* dst = rowData;
const uint8* src = srcData.getLinePointer (y);
if (image.hasAlphaChannel())
{
for (int i = width; --i >= 0;)
{
PixelARGB p (*(const PixelARGB*) src);
p.unpremultiply();
*dst++ = p.getRed();
*dst++ = p.getGreen();
*dst++ = p.getBlue();
*dst++ = p.getAlpha();
src += srcData.pixelStride;
}
}
else
{
for (int i = width; --i >= 0;)
{
*dst++ = ((const PixelRGB*) src)->getRed();
*dst++ = ((const PixelRGB*) src)->getGreen();
*dst++ = ((const PixelRGB*) src)->getBlue();
src += srcData.pixelStride;
}
}
png_bytep rowPtr = rowData;
png_write_rows (pngWriteStruct, &rowPtr, 1);
}
png_write_end (pngWriteStruct, pngInfoStruct);
png_destroy_write_struct (&pngWriteStruct, &pngInfoStruct);
return true;
}
} // namespace juce