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[master] Ported cosmetic changes to pngread.c

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from libpng-1.4.0beta87.
This commit is contained in:
Glenn Randers-Pehrson 2009-10-17 19:02:45 -05:00
parent d4e3ef6eae
commit e4f15b0f0e
1 changed files with 249 additions and 234 deletions
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353
pngread.c
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@ -1,7 +1,7 @@
/* pngread.c - read a PNG file /* pngread.c - read a PNG file
* *
* Last changed in libpng 1.2.37 [June 4, 2009] * Last changed in libpng 1.2.41 [October 17, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -16,7 +16,8 @@
#define PNG_INTERNAL #define PNG_INTERNAL
#include "png.h" #include "png.h"
#if defined(PNG_READ_SUPPORTED) #ifdef PNG_READ_SUPPORTED
/* Create a PNG structure for reading, and allocate any memory needed. */ /* Create a PNG structure for reading, and allocate any memory needed. */
png_structp PNGAPI png_structp PNGAPI
@ -51,6 +52,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
int i; int i;
png_debug(1, "in png_create_read_struct"); png_debug(1, "in png_create_read_struct");
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
@ -86,7 +88,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf)); png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
#endif #endif
#endif #endif /* PNG_SETJMP_SUPPORTED */
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
@ -152,20 +154,23 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
{ {
case Z_OK: /* Do nothing */ break; case Z_OK: /* Do nothing */ break;
case Z_MEM_ERROR: case Z_MEM_ERROR:
case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break; case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error");
case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break; break;
case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error");
break;
default: png_error(png_ptr, "Unknown zlib error"); default: png_error(png_ptr, "Unknown zlib error");
} }
png_ptr->zstream.next_out = png_ptr->zbuf; png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL); png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
/* Applications that neglect to set up their own setjmp() and then encounter /* Applications that neglect to set up their own setjmp() and then
a png_error() will longjmp here. Since the jmpbuf is then meaningless we encounter a png_error() will longjmp here. Since the jmpbuf is
abort instead of returning. */ then meaningless we abort instead of returning. */
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf)) if (setjmp(jmpbuf))
PNG_ABORT(); PNG_ABORT();
@ -174,14 +179,16 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
if (setjmp(png_ptr->jmpbuf)) if (setjmp(png_ptr->jmpbuf))
PNG_ABORT(); PNG_ABORT();
#endif #endif
#endif #endif /* PNG_SETJMP_SUPPORTED */
return (png_ptr); return (png_ptr);
} }
#if defined(PNG_1_0_X) || defined(PNG_1_2_X) #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* Initialize PNG structure for reading, and allocate any memory needed. /* Initialize PNG structure for reading, and allocate any memory needed.
This interface is deprecated in favour of the png_create_read_struct(), * This interface is deprecated in favour of the png_create_read_struct(),
and it will disappear as of libpng-1.3.0. */ * and it will disappear as of libpng-1.3.0.
*/
#undef png_read_init #undef png_read_init
void PNGAPI void PNGAPI
png_read_init(png_structp png_ptr) png_read_init(png_structp png_ptr)
@ -298,6 +305,7 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
/* Initialize zbuf - compression buffer */ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE; png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zstream.zalloc = png_zalloc;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size); (png_uint_32)png_ptr->zbuf_size);
png_ptr->zstream.zalloc = png_zalloc; png_ptr->zstream.zalloc = png_zalloc;
@ -307,9 +315,8 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
switch (inflateInit(&png_ptr->zstream)) switch (inflateInit(&png_ptr->zstream))
{ {
case Z_OK: /* Do nothing */ break; case Z_OK: /* Do nothing */ break;
case Z_MEM_ERROR: case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break;
case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory"); break; case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break;
case Z_VERSION_ERROR: png_error(png_ptr, "zlib version"); break;
default: png_error(png_ptr, "Unknown zlib error"); default: png_error(png_ptr, "Unknown zlib error");
} }
@ -319,7 +326,7 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL); png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
} }
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
/* Read the information before the actual image data. This has been /* Read the information before the actual image data. This has been
* changed in v0.90 to allow reading a file that already has the magic * changed in v0.90 to allow reading a file that already has the magic
* bytes read from the stream. You can tell libpng how many bytes have * bytes read from the stream. You can tell libpng how many bytes have
@ -331,9 +338,11 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
void PNGAPI void PNGAPI
png_read_info(png_structp png_ptr, png_infop info_ptr) png_read_info(png_structp png_ptr, png_infop info_ptr)
{ {
png_debug(1, "in png_read_info");
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
png_debug(1, "in png_read_info");
/* If we haven't checked all of the PNG signature bytes, do so now. */ /* If we haven't checked all of the PNG signature bytes, do so now. */
if (png_ptr->sig_bytes < 8) if (png_ptr->sig_bytes < 8)
{ {
@ -357,63 +366,61 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
for (;;) for (;;)
{ {
#ifdef PNG_USE_LOCAL_ARRAYS PNG_IHDR;
PNG_CONST PNG_IHDR; PNG_IDAT;
PNG_CONST PNG_IDAT; PNG_IEND;
PNG_CONST PNG_IEND; PNG_PLTE;
PNG_CONST PNG_PLTE; #ifdef PNG_READ_bKGD_SUPPORTED
#if defined(PNG_READ_bKGD_SUPPORTED) PNG_bKGD;
PNG_CONST PNG_bKGD;
#endif #endif
#if defined(PNG_READ_cHRM_SUPPORTED) #ifdef PNG_READ_cHRM_SUPPORTED
PNG_CONST PNG_cHRM; PNG_cHRM;
#endif #endif
#if defined(PNG_READ_gAMA_SUPPORTED) #ifdef PNG_READ_gAMA_SUPPORTED
PNG_CONST PNG_gAMA; PNG_gAMA;
#endif #endif
#if defined(PNG_READ_hIST_SUPPORTED) #ifdef PNG_READ_hIST_SUPPORTED
PNG_CONST PNG_hIST; PNG_hIST;
#endif #endif
#if defined(PNG_READ_iCCP_SUPPORTED) #ifdef PNG_READ_iCCP_SUPPORTED
PNG_CONST PNG_iCCP; PNG_iCCP;
#endif #endif
#if defined(PNG_READ_iTXt_SUPPORTED) #ifdef PNG_READ_iTXt_SUPPORTED
PNG_CONST PNG_iTXt; PNG_iTXt;
#endif #endif
#if defined(PNG_READ_oFFs_SUPPORTED) #ifdef PNG_READ_oFFs_SUPPORTED
PNG_CONST PNG_oFFs; PNG_oFFs;
#endif #endif
#if defined(PNG_READ_pCAL_SUPPORTED) #ifdef PNG_READ_pCAL_SUPPORTED
PNG_CONST PNG_pCAL; PNG_pCAL;
#endif #endif
#if defined(PNG_READ_pHYs_SUPPORTED) #ifdef PNG_READ_pHYs_SUPPORTED
PNG_CONST PNG_pHYs; PNG_pHYs;
#endif #endif
#if defined(PNG_READ_sBIT_SUPPORTED) #ifdef PNG_READ_sBIT_SUPPORTED
PNG_CONST PNG_sBIT; PNG_sBIT;
#endif #endif
#if defined(PNG_READ_sCAL_SUPPORTED) #ifdef PNG_READ_sCAL_SUPPORTED
PNG_CONST PNG_sCAL; PNG_sCAL;
#endif #endif
#if defined(PNG_READ_sPLT_SUPPORTED) #ifdef PNG_READ_sPLT_SUPPORTED
PNG_CONST PNG_sPLT; PNG_sPLT;
#endif #endif
#if defined(PNG_READ_sRGB_SUPPORTED) #ifdef PNG_READ_sRGB_SUPPORTED
PNG_CONST PNG_sRGB; PNG_sRGB;
#endif #endif
#if defined(PNG_READ_tEXt_SUPPORTED) #ifdef PNG_READ_tEXt_SUPPORTED
PNG_CONST PNG_tEXt; PNG_tEXt;
#endif #endif
#if defined(PNG_READ_tIME_SUPPORTED) #ifdef PNG_READ_tIME_SUPPORTED
PNG_CONST PNG_tIME; PNG_tIME;
#endif #endif
#if defined(PNG_READ_tRNS_SUPPORTED) #ifdef PNG_READ_tRNS_SUPPORTED
PNG_CONST PNG_tRNS; PNG_tRNS;
#endif #endif
#if defined(PNG_READ_zTXt_SUPPORTED) #ifdef PNG_READ_zTXt_SUPPORTED
PNG_CONST PNG_zTXt; PNG_zTXt;
#endif #endif
#endif /* PNG_USE_LOCAL_ARRAYS */
png_uint_32 length = png_read_chunk_header(png_ptr); png_uint_32 length = png_read_chunk_header(png_ptr);
PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
@ -461,71 +468,71 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
png_ptr->mode |= PNG_HAVE_IDAT; png_ptr->mode |= PNG_HAVE_IDAT;
break; break;
} }
#if defined(PNG_READ_bKGD_SUPPORTED) #ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(chunk_name, png_bKGD, 4)) else if (!png_memcmp(chunk_name, png_bKGD, 4))
png_handle_bKGD(png_ptr, info_ptr, length); png_handle_bKGD(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_cHRM_SUPPORTED) #ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(chunk_name, png_cHRM, 4)) else if (!png_memcmp(chunk_name, png_cHRM, 4))
png_handle_cHRM(png_ptr, info_ptr, length); png_handle_cHRM(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_gAMA_SUPPORTED) #ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(chunk_name, png_gAMA, 4)) else if (!png_memcmp(chunk_name, png_gAMA, 4))
png_handle_gAMA(png_ptr, info_ptr, length); png_handle_gAMA(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_hIST_SUPPORTED) #ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(chunk_name, png_hIST, 4)) else if (!png_memcmp(chunk_name, png_hIST, 4))
png_handle_hIST(png_ptr, info_ptr, length); png_handle_hIST(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_oFFs_SUPPORTED) #ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(chunk_name, png_oFFs, 4)) else if (!png_memcmp(chunk_name, png_oFFs, 4))
png_handle_oFFs(png_ptr, info_ptr, length); png_handle_oFFs(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_pCAL_SUPPORTED) #ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_pCAL, 4)) else if (!png_memcmp(chunk_name, png_pCAL, 4))
png_handle_pCAL(png_ptr, info_ptr, length); png_handle_pCAL(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sCAL_SUPPORTED) #ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_sCAL, 4)) else if (!png_memcmp(chunk_name, png_sCAL, 4))
png_handle_sCAL(png_ptr, info_ptr, length); png_handle_sCAL(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_pHYs_SUPPORTED) #ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(chunk_name, png_pHYs, 4)) else if (!png_memcmp(chunk_name, png_pHYs, 4))
png_handle_pHYs(png_ptr, info_ptr, length); png_handle_pHYs(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sBIT_SUPPORTED) #ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sBIT, 4)) else if (!png_memcmp(chunk_name, png_sBIT, 4))
png_handle_sBIT(png_ptr, info_ptr, length); png_handle_sBIT(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sRGB_SUPPORTED) #ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(chunk_name, png_sRGB, 4)) else if (!png_memcmp(chunk_name, png_sRGB, 4))
png_handle_sRGB(png_ptr, info_ptr, length); png_handle_sRGB(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_iCCP_SUPPORTED) #ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(chunk_name, png_iCCP, 4)) else if (!png_memcmp(chunk_name, png_iCCP, 4))
png_handle_iCCP(png_ptr, info_ptr, length); png_handle_iCCP(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sPLT_SUPPORTED) #ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sPLT, 4)) else if (!png_memcmp(chunk_name, png_sPLT, 4))
png_handle_sPLT(png_ptr, info_ptr, length); png_handle_sPLT(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_tEXt_SUPPORTED) #ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_tEXt, 4)) else if (!png_memcmp(chunk_name, png_tEXt, 4))
png_handle_tEXt(png_ptr, info_ptr, length); png_handle_tEXt(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_tIME_SUPPORTED) #ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(chunk_name, png_tIME, 4)) else if (!png_memcmp(chunk_name, png_tIME, 4))
png_handle_tIME(png_ptr, info_ptr, length); png_handle_tIME(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_tRNS_SUPPORTED) #ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(chunk_name, png_tRNS, 4)) else if (!png_memcmp(chunk_name, png_tRNS, 4))
png_handle_tRNS(png_ptr, info_ptr, length); png_handle_tRNS(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_zTXt_SUPPORTED) #ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_zTXt, 4)) else if (!png_memcmp(chunk_name, png_zTXt, 4))
png_handle_zTXt(png_ptr, info_ptr, length); png_handle_zTXt(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_iTXt_SUPPORTED) #ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_iTXt, 4)) else if (!png_memcmp(chunk_name, png_iTXt, 4))
png_handle_iTXt(png_ptr, info_ptr, length); png_handle_iTXt(png_ptr, info_ptr, length);
#endif #endif
@ -533,13 +540,14 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
png_handle_unknown(png_ptr, info_ptr, length); png_handle_unknown(png_ptr, info_ptr, length);
} }
} }
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
/* Optional call to update the users info_ptr structure */ /* Optional call to update the users info_ptr structure */
void PNGAPI void PNGAPI
png_read_update_info(png_structp png_ptr, png_infop info_ptr) png_read_update_info(png_structp png_ptr, png_infop info_ptr)
{ {
png_debug(1, "in png_read_update_info"); png_debug(1, "in png_read_update_info");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
@ -550,7 +558,7 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr)
png_read_transform_info(png_ptr, info_ptr); png_read_transform_info(png_ptr, info_ptr);
} }
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
/* Initialize palette, background, etc, after transformations /* Initialize palette, background, etc, after transformations
* are set, but before any reading takes place. This allows * are set, but before any reading takes place. This allows
* the user to obtain a gamma-corrected palette, for example. * the user to obtain a gamma-corrected palette, for example.
@ -560,28 +568,30 @@ void PNGAPI
png_start_read_image(png_structp png_ptr) png_start_read_image(png_structp png_ptr)
{ {
png_debug(1, "in png_start_read_image"); png_debug(1, "in png_start_read_image");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr); png_read_start_row(png_ptr);
} }
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
void PNGAPI void PNGAPI
png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
{ {
#ifdef PNG_USE_LOCAL_ARRAYS PNG_IDAT;
PNG_CONST PNG_IDAT;
PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
0xff}; 0xff};
PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
#endif
int ret; int ret;
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_debug2(1, "in png_read_row (row %lu, pass %d)", png_debug2(1, "in png_read_row (row %lu, pass %d)",
png_ptr->row_number, png_ptr->pass); png_ptr->row_number, png_ptr->pass);
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr); png_read_start_row(png_ptr);
if (png_ptr->row_number == 0 && png_ptr->pass == 0) if (png_ptr->row_number == 0 && png_ptr->pass == 0)
@ -617,7 +627,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
#endif #endif
} }
#if defined(PNG_READ_INTERLACING_SUPPORTED) #ifdef PNG_READ_INTERLACING_SUPPORTED
/* If interlaced and we do not need a new row, combine row and return */ /* If interlaced and we do not need a new row, combine row and return */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{ {
@ -751,7 +761,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf, png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
png_ptr->rowbytes + 1); png_ptr->rowbytes + 1);
#if defined(PNG_MNG_FEATURES_SUPPORTED) #ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{ {
@ -764,7 +774,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
png_do_read_transformations(png_ptr); png_do_read_transformations(png_ptr);
#if defined(PNG_READ_INTERLACING_SUPPORTED) #ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */ /* Blow up interlaced rows to full size */
if (png_ptr->interlaced && if (png_ptr->interlaced &&
(png_ptr->transformations & PNG_INTERLACE)) (png_ptr->transformations & PNG_INTERLACE))
@ -796,9 +806,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if (png_ptr->read_row_fn != NULL) if (png_ptr->read_row_fn != NULL)
(*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
} }
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
/* Read one or more rows of image data. If the image is interlaced, /* Read one or more rows of image data. If the image is interlaced,
* and png_set_interlace_handling() has been called, the rows need to * and png_set_interlace_handling() has been called, the rows need to
* contain the contents of the rows from the previous pass. If the * contain the contents of the rows from the previous pass. If the
@ -832,6 +842,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
png_bytepp dp; png_bytepp dp;
png_debug(1, "in png_read_rows"); png_debug(1, "in png_read_rows");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
rp = row; rp = row;
@ -859,9 +870,9 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
dp++; dp++;
} }
} }
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
/* Read the entire image. If the image has an alpha channel or a tRNS /* Read the entire image. If the image has an alpha channel or a tRNS
* chunk, and you have called png_handle_alpha()[*], you will need to * chunk, and you have called png_handle_alpha()[*], you will need to
* initialize the image to the current image that PNG will be overlaying. * initialize the image to the current image that PNG will be overlaying.
@ -882,6 +893,7 @@ png_read_image(png_structp png_ptr, png_bytepp image)
png_bytepp rp; png_bytepp rp;
png_debug(1, "in png_read_image"); png_debug(1, "in png_read_image");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
@ -908,9 +920,9 @@ png_read_image(png_structp png_ptr, png_bytepp image)
} }
} }
} }
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
/* Read the end of the PNG file. Will not read past the end of the /* Read the end of the PNG file. Will not read past the end of the
* file, will verify the end is accurate, and will read any comments * file, will verify the end is accurate, and will read any comments
* or time information at the end of the file, if info is not NULL. * or time information at the end of the file, if info is not NULL.
@ -919,69 +931,68 @@ void PNGAPI
png_read_end(png_structp png_ptr, png_infop info_ptr) png_read_end(png_structp png_ptr, png_infop info_ptr)
{ {
png_debug(1, "in png_read_end"); png_debug(1, "in png_read_end");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
do do
{ {
#ifdef PNG_USE_LOCAL_ARRAYS PNG_IHDR;
PNG_CONST PNG_IHDR; PNG_IDAT;
PNG_CONST PNG_IDAT; PNG_IEND;
PNG_CONST PNG_IEND; PNG_PLTE;
PNG_CONST PNG_PLTE; #ifdef PNG_READ_bKGD_SUPPORTED
#if defined(PNG_READ_bKGD_SUPPORTED) PNG_bKGD;
PNG_CONST PNG_bKGD;
#endif #endif
#if defined(PNG_READ_cHRM_SUPPORTED) #ifdef PNG_READ_cHRM_SUPPORTED
PNG_CONST PNG_cHRM; PNG_cHRM;
#endif #endif
#if defined(PNG_READ_gAMA_SUPPORTED) #ifdef PNG_READ_gAMA_SUPPORTED
PNG_CONST PNG_gAMA; PNG_gAMA;
#endif #endif
#if defined(PNG_READ_hIST_SUPPORTED) #ifdef PNG_READ_hIST_SUPPORTED
PNG_CONST PNG_hIST; PNG_hIST;
#endif #endif
#if defined(PNG_READ_iCCP_SUPPORTED) #ifdef PNG_READ_iCCP_SUPPORTED
PNG_CONST PNG_iCCP; PNG_iCCP;
#endif #endif
#if defined(PNG_READ_iTXt_SUPPORTED) #ifdef PNG_READ_iTXt_SUPPORTED
PNG_CONST PNG_iTXt; PNG_iTXt;
#endif #endif
#if defined(PNG_READ_oFFs_SUPPORTED) #ifdef PNG_READ_oFFs_SUPPORTED
PNG_CONST PNG_oFFs; PNG_oFFs;
#endif #endif
#if defined(PNG_READ_pCAL_SUPPORTED) #ifdef PNG_READ_pCAL_SUPPORTED
PNG_CONST PNG_pCAL; PNG_pCAL;
#endif #endif
#if defined(PNG_READ_pHYs_SUPPORTED) #ifdef PNG_READ_pHYs_SUPPORTED
PNG_CONST PNG_pHYs; PNG_pHYs;
#endif #endif
#if defined(PNG_READ_sBIT_SUPPORTED) #ifdef PNG_READ_sBIT_SUPPORTED
PNG_CONST PNG_sBIT; PNG_sBIT;
#endif #endif
#if defined(PNG_READ_sCAL_SUPPORTED) #ifdef PNG_READ_sCAL_SUPPORTED
PNG_CONST PNG_sCAL; PNG_sCAL;
#endif #endif
#if defined(PNG_READ_sPLT_SUPPORTED) #ifdef PNG_READ_sPLT_SUPPORTED
PNG_CONST PNG_sPLT; PNG_sPLT;
#endif #endif
#if defined(PNG_READ_sRGB_SUPPORTED) #ifdef PNG_READ_sRGB_SUPPORTED
PNG_CONST PNG_sRGB; PNG_sRGB;
#endif #endif
#if defined(PNG_READ_tEXt_SUPPORTED) #ifdef PNG_READ_tEXt_SUPPORTED
PNG_CONST PNG_tEXt; PNG_tEXt;
#endif #endif
#if defined(PNG_READ_tIME_SUPPORTED) #ifdef PNG_READ_tIME_SUPPORTED
PNG_CONST PNG_tIME; PNG_tIME;
#endif #endif
#if defined(PNG_READ_tRNS_SUPPORTED) #ifdef PNG_READ_tRNS_SUPPORTED
PNG_CONST PNG_tRNS; PNG_tRNS;
#endif #endif
#if defined(PNG_READ_zTXt_SUPPORTED) #ifdef PNG_READ_zTXt_SUPPORTED
PNG_CONST PNG_zTXt; PNG_zTXt;
#endif #endif
#endif /* PNG_USE_LOCAL_ARRAYS */
png_uint_32 length = png_read_chunk_header(png_ptr); png_uint_32 length = png_read_chunk_header(png_ptr);
PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
@ -1013,71 +1024,71 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
} }
else if (!png_memcmp(chunk_name, png_PLTE, 4)) else if (!png_memcmp(chunk_name, png_PLTE, 4))
png_handle_PLTE(png_ptr, info_ptr, length); png_handle_PLTE(png_ptr, info_ptr, length);
#if defined(PNG_READ_bKGD_SUPPORTED) #ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(chunk_name, png_bKGD, 4)) else if (!png_memcmp(chunk_name, png_bKGD, 4))
png_handle_bKGD(png_ptr, info_ptr, length); png_handle_bKGD(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_cHRM_SUPPORTED) #ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(chunk_name, png_cHRM, 4)) else if (!png_memcmp(chunk_name, png_cHRM, 4))
png_handle_cHRM(png_ptr, info_ptr, length); png_handle_cHRM(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_gAMA_SUPPORTED) #ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(chunk_name, png_gAMA, 4)) else if (!png_memcmp(chunk_name, png_gAMA, 4))
png_handle_gAMA(png_ptr, info_ptr, length); png_handle_gAMA(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_hIST_SUPPORTED) #ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(chunk_name, png_hIST, 4)) else if (!png_memcmp(chunk_name, png_hIST, 4))
png_handle_hIST(png_ptr, info_ptr, length); png_handle_hIST(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_oFFs_SUPPORTED) #ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(chunk_name, png_oFFs, 4)) else if (!png_memcmp(chunk_name, png_oFFs, 4))
png_handle_oFFs(png_ptr, info_ptr, length); png_handle_oFFs(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_pCAL_SUPPORTED) #ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_pCAL, 4)) else if (!png_memcmp(chunk_name, png_pCAL, 4))
png_handle_pCAL(png_ptr, info_ptr, length); png_handle_pCAL(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sCAL_SUPPORTED) #ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_sCAL, 4)) else if (!png_memcmp(chunk_name, png_sCAL, 4))
png_handle_sCAL(png_ptr, info_ptr, length); png_handle_sCAL(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_pHYs_SUPPORTED) #ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(chunk_name, png_pHYs, 4)) else if (!png_memcmp(chunk_name, png_pHYs, 4))
png_handle_pHYs(png_ptr, info_ptr, length); png_handle_pHYs(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sBIT_SUPPORTED) #ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sBIT, 4)) else if (!png_memcmp(chunk_name, png_sBIT, 4))
png_handle_sBIT(png_ptr, info_ptr, length); png_handle_sBIT(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sRGB_SUPPORTED) #ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(chunk_name, png_sRGB, 4)) else if (!png_memcmp(chunk_name, png_sRGB, 4))
png_handle_sRGB(png_ptr, info_ptr, length); png_handle_sRGB(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_iCCP_SUPPORTED) #ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(chunk_name, png_iCCP, 4)) else if (!png_memcmp(chunk_name, png_iCCP, 4))
png_handle_iCCP(png_ptr, info_ptr, length); png_handle_iCCP(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_sPLT_SUPPORTED) #ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sPLT, 4)) else if (!png_memcmp(chunk_name, png_sPLT, 4))
png_handle_sPLT(png_ptr, info_ptr, length); png_handle_sPLT(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_tEXt_SUPPORTED) #ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_tEXt, 4)) else if (!png_memcmp(chunk_name, png_tEXt, 4))
png_handle_tEXt(png_ptr, info_ptr, length); png_handle_tEXt(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_tIME_SUPPORTED) #ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(chunk_name, png_tIME, 4)) else if (!png_memcmp(chunk_name, png_tIME, 4))
png_handle_tIME(png_ptr, info_ptr, length); png_handle_tIME(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_tRNS_SUPPORTED) #ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(chunk_name, png_tRNS, 4)) else if (!png_memcmp(chunk_name, png_tRNS, 4))
png_handle_tRNS(png_ptr, info_ptr, length); png_handle_tRNS(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_zTXt_SUPPORTED) #ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_zTXt, 4)) else if (!png_memcmp(chunk_name, png_zTXt, 4))
png_handle_zTXt(png_ptr, info_ptr, length); png_handle_zTXt(png_ptr, info_ptr, length);
#endif #endif
#if defined(PNG_READ_iTXt_SUPPORTED) #ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_iTXt, 4)) else if (!png_memcmp(chunk_name, png_iTXt, 4))
png_handle_iTXt(png_ptr, info_ptr, length); png_handle_iTXt(png_ptr, info_ptr, length);
#endif #endif
@ -1085,7 +1096,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
png_handle_unknown(png_ptr, info_ptr, length); png_handle_unknown(png_ptr, info_ptr, length);
} while (!(png_ptr->mode & PNG_HAVE_IEND)); } while (!(png_ptr->mode & PNG_HAVE_IEND));
} }
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
/* Free all memory used by the read */ /* Free all memory used by the read */
void PNGAPI void PNGAPI
@ -1100,6 +1111,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
#endif #endif
png_debug(1, "in png_destroy_read_struct"); png_debug(1, "in png_destroy_read_struct");
if (png_ptr_ptr != NULL) if (png_ptr_ptr != NULL)
png_ptr = *png_ptr_ptr; png_ptr = *png_ptr_ptr;
if (png_ptr == NULL) if (png_ptr == NULL)
@ -1120,7 +1132,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
if (info_ptr != NULL) if (info_ptr != NULL)
{ {
#if defined(PNG_TEXT_SUPPORTED) #ifdef PNG_TEXT_SUPPORTED
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1);
#endif #endif
@ -1135,7 +1147,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
if (end_info_ptr != NULL) if (end_info_ptr != NULL)
{ {
#if defined(PNG_READ_TEXT_SUPPORTED) #ifdef PNG_READ_TEXT_SUPPORTED
png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1); png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
#endif #endif
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
@ -1174,6 +1186,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
#endif #endif
png_debug(1, "in png_read_destroy"); png_debug(1, "in png_read_destroy");
if (info_ptr != NULL) if (info_ptr != NULL)
png_info_destroy(png_ptr, info_ptr); png_info_destroy(png_ptr, info_ptr);
@ -1184,14 +1197,14 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
png_free(png_ptr, png_ptr->big_row_buf); png_free(png_ptr, png_ptr->big_row_buf);
png_free(png_ptr, png_ptr->prev_row); png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
#if defined(PNG_READ_DITHER_SUPPORTED) #ifdef PNG_READ_DITHER_SUPPORTED
png_free(png_ptr, png_ptr->palette_lookup); png_free(png_ptr, png_ptr->palette_lookup);
png_free(png_ptr, png_ptr->dither_index); png_free(png_ptr, png_ptr->dither_index);
#endif #endif
#if defined(PNG_READ_GAMMA_SUPPORTED) #ifdef PNG_READ_GAMMA_SUPPORTED
png_free(png_ptr, png_ptr->gamma_table); png_free(png_ptr, png_ptr->gamma_table);
#endif #endif
#if defined(PNG_READ_BACKGROUND_SUPPORTED) #ifdef PNG_READ_BACKGROUND_SUPPORTED
png_free(png_ptr, png_ptr->gamma_from_1); png_free(png_ptr, png_ptr->gamma_from_1);
png_free(png_ptr, png_ptr->gamma_to_1); png_free(png_ptr, png_ptr->gamma_to_1);
#endif #endif
@ -1216,7 +1229,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
#endif #endif
#endif #endif
#if defined(PNG_READ_hIST_SUPPORTED) #ifdef PNG_READ_hIST_SUPPORTED
#ifdef PNG_FREE_ME_SUPPORTED #ifdef PNG_FREE_ME_SUPPORTED
if (png_ptr->free_me & PNG_FREE_HIST) if (png_ptr->free_me & PNG_FREE_HIST)
png_free(png_ptr, png_ptr->hist); png_free(png_ptr, png_ptr->hist);
@ -1227,7 +1240,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
png_ptr->flags &= ~PNG_FLAG_FREE_HIST; png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
#endif #endif
#endif #endif
#if defined(PNG_READ_GAMMA_SUPPORTED) #ifdef PNG_READ_GAMMA_SUPPORTED
if (png_ptr->gamma_16_table != NULL) if (png_ptr->gamma_16_table != NULL)
{ {
int i; int i;
@ -1238,7 +1251,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
} }
png_free(png_ptr, png_ptr->gamma_16_table); png_free(png_ptr, png_ptr->gamma_16_table);
} }
#if defined(PNG_READ_BACKGROUND_SUPPORTED) #ifdef PNG_READ_BACKGROUND_SUPPORTED
if (png_ptr->gamma_16_from_1 != NULL) if (png_ptr->gamma_16_from_1 != NULL)
{ {
int i; int i;
@ -1261,7 +1274,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
} }
#endif #endif
#endif #endif
#if defined(PNG_TIME_RFC1123_SUPPORTED) #ifdef PNG_TIME_RFC1123_SUPPORTED
png_free(png_ptr, png_ptr->time_buffer); png_free(png_ptr, png_ptr->time_buffer);
#endif #endif
@ -1314,8 +1327,8 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
} }
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED #ifndef PNG_NO_SEQUENTIAL_READ
#if defined(PNG_INFO_IMAGE_SUPPORTED) #ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI void PNGAPI
png_read_png(png_structp png_ptr, png_infop info_ptr, png_read_png(png_structp png_ptr, png_infop info_ptr,
int transforms, int transforms,
@ -1325,7 +1338,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
/* Invert the alpha channel from opacity to transparency /* Invert the alpha channel from opacity to transparency
*/ */
if (transforms & PNG_TRANSFORM_INVERT_ALPHA) if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
@ -1341,14 +1354,14 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
/* -------------- image transformations start here ------------------- */ /* -------------- image transformations start here ------------------- */
#if defined(PNG_READ_16_TO_8_SUPPORTED) #ifdef PNG_READ_16_TO_8_SUPPORTED
/* Tell libpng to strip 16 bit/color files down to 8 bits per color. /* Tell libpng to strip 16 bit/color files down to 8 bits per color.
*/ */
if (transforms & PNG_TRANSFORM_STRIP_16) if (transforms & PNG_TRANSFORM_STRIP_16)
png_set_strip_16(png_ptr); png_set_strip_16(png_ptr);
#endif #endif
#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
/* Strip alpha bytes from the input data without combining with /* Strip alpha bytes from the input data without combining with
* the background (not recommended). * the background (not recommended).
*/ */
@ -1364,7 +1377,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
png_set_packing(png_ptr); png_set_packing(png_ptr);
#endif #endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED) #ifdef PNG_READ_PACKSWAP_SUPPORTED
/* Change the order of packed pixels to least significant bit first /* Change the order of packed pixels to least significant bit first
* (not useful if you are using png_set_packing). * (not useful if you are using png_set_packing).
*/ */
@ -1372,7 +1385,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
png_set_packswap(png_ptr); png_set_packswap(png_ptr);
#endif #endif
#if defined(PNG_READ_EXPAND_SUPPORTED) #ifdef PNG_READ_EXPAND_SUPPORTED
/* Expand paletted colors into true RGB triplets /* Expand paletted colors into true RGB triplets
* Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel
* Expand paletted or RGB images with transparency to full alpha * Expand paletted or RGB images with transparency to full alpha
@ -1388,14 +1401,14 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
/* We don't handle background color or gamma transformation or dithering. /* We don't handle background color or gamma transformation or dithering.
*/ */
#if defined(PNG_READ_INVERT_SUPPORTED) #ifdef PNG_READ_INVERT_SUPPORTED
/* Invert monochrome files to have 0 as white and 1 as black /* Invert monochrome files to have 0 as white and 1 as black
*/ */
if (transforms & PNG_TRANSFORM_INVERT_MONO) if (transforms & PNG_TRANSFORM_INVERT_MONO)
png_set_invert_mono(png_ptr); png_set_invert_mono(png_ptr);
#endif #endif
#if defined(PNG_READ_SHIFT_SUPPORTED) #ifdef PNG_READ_SHIFT_SUPPORTED
/* If you want to shift the pixel values from the range [0,255] or /* If you want to shift the pixel values from the range [0,255] or
* [0,65535] to the original [0,7] or [0,31], or whatever range the * [0,65535] to the original [0,7] or [0,31], or whatever range the
* colors were originally in: * colors were originally in:
@ -1410,21 +1423,21 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
} }
#endif #endif
#if defined(PNG_READ_BGR_SUPPORTED) #ifdef PNG_READ_BGR_SUPPORTED
/* Flip the RGB pixels to BGR (or RGBA to BGRA) /* Flip the RGB pixels to BGR (or RGBA to BGRA)
*/ */
if (transforms & PNG_TRANSFORM_BGR) if (transforms & PNG_TRANSFORM_BGR)
png_set_bgr(png_ptr); png_set_bgr(png_ptr);
#endif #endif
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
/* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR)
*/ */
if (transforms & PNG_TRANSFORM_SWAP_ALPHA) if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
png_set_swap_alpha(png_ptr); png_set_swap_alpha(png_ptr);
#endif #endif
#if defined(PNG_READ_SWAP_SUPPORTED) #ifdef PNG_READ_SWAP_SUPPORTED
/* Swap bytes of 16 bit files to least significant byte first /* Swap bytes of 16 bit files to least significant byte first
*/ */
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
@ -1450,9 +1463,11 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
info_ptr->height * png_sizeof(png_bytep)); info_ptr->height * png_sizeof(png_bytep));
png_memset(info_ptr->row_pointers, 0, info_ptr->height png_memset(info_ptr->row_pointers, 0, info_ptr->height
* png_sizeof(png_bytep)); * png_sizeof(png_bytep));
#ifdef PNG_FREE_ME_SUPPORTED #ifdef PNG_FREE_ME_SUPPORTED
info_ptr->free_me |= PNG_FREE_ROWS; info_ptr->free_me |= PNG_FREE_ROWS;
#endif #endif
for (row = 0; row < (int)info_ptr->height; row++) for (row = 0; row < (int)info_ptr->height; row++)
info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr, info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
png_get_rowbytes(png_ptr, info_ptr)); png_get_rowbytes(png_ptr, info_ptr));
@ -1469,5 +1484,5 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
} }
#endif /* PNG_INFO_IMAGE_SUPPORTED */ #endif /* PNG_INFO_IMAGE_SUPPORTED */
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
#endif /* PNG_READ_SUPPORTED */ #endif /* PNG_READ_SUPPORTED */