606 lines
19 KiB
C++
606 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("-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;
|
||
|
|
const int width = image.getWidth();
|
||
|
|
const int height = image.getHeight();
|
||
|
|
|
||
|
|
png_structp pngWriteStruct = png_create_write_struct (PNG_LIBPNG_VER_STRING, 0, 0, 0);
|
||
|
|
|
||
|
|
if (pngWriteStruct == nullptr)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
png_infop pngInfoStruct = png_create_info_struct (pngWriteStruct);
|
||
|
|
|
||
|
|
if (pngInfoStruct == nullptr)
|
||
|
|
{
|
||
|
|
png_destroy_write_struct (&pngWriteStruct, (png_infopp) nullptr);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
png_set_write_fn (pngWriteStruct, &out, PNGHelpers::writeDataCallback, 0);
|
||
|
|
|
||
|
|
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
|