diff options
Diffstat (limited to 'src/3rdparty/libpng/pngread.c')
| -rw-r--r-- | src/3rdparty/libpng/pngread.c | 716 |
1 files changed, 296 insertions, 420 deletions
diff --git a/src/3rdparty/libpng/pngread.c b/src/3rdparty/libpng/pngread.c index a4cbb3e..1b3a3f5 100644 --- a/src/3rdparty/libpng/pngread.c +++ b/src/3rdparty/libpng/pngread.c @@ -1,8 +1,8 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.2.37 [June 4, 2009] - * Copyright (c) 1998-2009 Glenn Randers-Pehrson + * Last changed in libpng 1.4.0 [January 3, 2010] + * Copyright (c) 1998-2010 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -14,9 +14,11 @@ * read a PNG file or stream. */ -#define PNG_INTERNAL +#define PNG_NO_PEDANTIC_WARNINGS #include "png.h" -#if defined(PNG_READ_SUPPORTED) +#ifdef PNG_READ_SUPPORTED +#include "pngpriv.h" + /* Create a PNG structure for reading, and allocate any memory needed. */ png_structp PNGAPI @@ -26,7 +28,7 @@ png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr, #ifdef PNG_USER_MEM_SUPPORTED return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL)); + warn_fn, NULL, NULL, NULL)); } /* Alternate create PNG structure for reading, and allocate any memory needed. */ @@ -41,6 +43,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, volatile #endif png_structp png_ptr; + volatile int png_cleanup_needed = 0; #ifdef PNG_SETJMP_SUPPORTED #ifdef USE_FAR_KEYWORD @@ -51,9 +54,10 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, int i; png_debug(1, "in png_create_read_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); + malloc_fn, mem_ptr); #else png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); #endif @@ -62,31 +66,26 @@ png_create_read_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; + /* Added at libpng-1.4.0 */ + png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; #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. */ #ifdef USE_FAR_KEYWORD if (setjmp(jmpbuf)) #else - if (setjmp(png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ #endif - { - png_free(png_ptr, png_ptr->zbuf); - 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); - } + PNG_ABORT(); #ifdef USE_FAR_KEYWORD - png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf)); -#endif + png_memcpy(png_jmpbuf(png_ptr), jmpbuf, png_sizeof(jmp_buf)); #endif +#endif /* PNG_SETJMP_SUPPORTED */ #ifdef PNG_USER_MEM_SUPPORTED png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); @@ -96,230 +95,105 @@ png_create_read_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++]); - } - else - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; - - - if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) - { - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - 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, + i = 0; + do + { + if (user_png_ver[i] != png_libpng_ver[i]) + png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + } while (png_libpng_ver[i++]); + } + else + png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + + + if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) + { + /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so + * we must recompile any applications that use any older library version. + * For versions after libpng 1.0, we will be compatible, so we need + * only check the first digit. + */ + if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || + (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || + (user_png_ver[0] == '0' && user_png_ver[2] < '9')) + { +#ifdef PNG_STDIO_SUPPORTED + 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 is running with png.c from libpng-%.20s", - png_libpng_ver); - png_warning(png_ptr, msg); + png_libpng_ver); + 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"); - } + png_warning(png_ptr, + "Incompatible libpng version in application and library"); + + png_cleanup_needed = 1; + } } + if (!png_cleanup_needed) + { /* 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_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, + png_ptr->zbuf_size); + if (png_ptr->zbuf == NULL) + png_cleanup_needed = 1; + } png_ptr->zstream.zalloc = png_zalloc; png_ptr->zstream.zfree = png_zfree; png_ptr->zstream.opaque = (voidpf)png_ptr; - switch (inflateInit(&png_ptr->zstream)) + if (!png_cleanup_needed) { - case Z_OK: /* Do nothing */ break; - case Z_MEM_ERROR: - case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break; - case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break; - default: png_error(png_ptr, "Unknown zlib error"); - } - - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL); - -#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. */ -#ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) - PNG_ABORT(); - png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf)); -#else - if (setjmp(png_ptr->jmpbuf)) - PNG_ABORT(); -#endif -#endif - return (png_ptr); -} - -#if defined(PNG_1_0_X) || defined(PNG_1_2_X) -/* Initialize PNG structure for reading, and allocate any memory needed. - This interface is deprecated in favour of the png_create_read_struct(), - and it will disappear as of libpng-1.3.0. */ -#undef png_read_init -void PNGAPI -png_read_init(png_structp png_ptr) -{ - /* We only come here via pre-1.0.7-compiled applications */ - png_read_init_2(png_ptr, "1.0.6 or earlier", 0, 0); -} - -void PNGAPI -png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver, - png_size_t png_struct_size, png_size_t png_info_size) -{ - /* We only come here via pre-1.0.12-compiled applications */ - if (png_ptr == NULL) - return; -#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) - if (png_sizeof(png_struct) > png_struct_size || - png_sizeof(png_info) > png_info_size) - { - char msg[80]; - png_ptr->warning_fn = NULL; - if (user_png_ver) + switch (inflateInit(&png_ptr->zstream)) { - png_snprintf(msg, 80, - "Application was compiled with png.h from libpng-%.20s", - user_png_ver); - png_warning(png_ptr, msg); + case Z_OK: /* Do nothing */ break; + case Z_MEM_ERROR: + case Z_STREAM_ERROR: png_warning(png_ptr, "zlib memory error"); + png_cleanup_needed = 1; break; + case Z_VERSION_ERROR: png_warning(png_ptr, "zlib version error"); + png_cleanup_needed = 1; break; + default: png_warning(png_ptr, "Unknown zlib error"); + png_cleanup_needed = 1; } - png_snprintf(msg, 80, - "Application is running with png.c from libpng-%.20s", - png_libpng_ver); - png_warning(png_ptr, msg); } -#endif - if (png_sizeof(png_struct) > png_struct_size) - { - png_ptr->error_fn = NULL; -#ifdef PNG_ERROR_NUMBERS_SUPPORTED - png_ptr->flags = 0; -#endif - png_error(png_ptr, - "The png struct allocated by the application for reading is too small."); - } - if (png_sizeof(png_info) > png_info_size) - { - png_ptr->error_fn = NULL; -#ifdef PNG_ERROR_NUMBERS_SUPPORTED - png_ptr->flags = 0; -#endif - png_error(png_ptr, - "The info struct allocated by application for reading is too small."); - } - png_read_init_3(&png_ptr, user_png_ver, png_struct_size); -} -#endif /* PNG_1_0_X || PNG_1_2_X */ - -void PNGAPI -png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver, - png_size_t png_struct_size) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* to save current jump buffer */ -#endif - - int i = 0; - - png_structp png_ptr=*ptr_ptr; - if (png_ptr == NULL) - return; - - do + if (png_cleanup_needed) { - if (user_png_ver[i] != png_libpng_ver[i]) - { -#ifdef PNG_LEGACY_SUPPORTED - png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + /* Clean up PNG structure and deallocate any memory. */ + png_free(png_ptr, png_ptr->zbuf); + 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_ptr->warning_fn = NULL; - png_warning(png_ptr, - "Application uses deprecated png_read_init() and should be recompiled."); - break; -#endif - } - } while (png_libpng_ver[i++]); - - png_debug(1, "in png_read_init_3"); - -#ifdef PNG_SETJMP_SUPPORTED - /* Save jump buffer and error functions */ - png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf)); -#endif - - if (png_sizeof(png_struct) > png_struct_size) - { - png_destroy_struct(png_ptr); - *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); - png_ptr = *ptr_ptr; - } - - /* Reset all variables to 0 */ - png_memset(png_ptr, 0, png_sizeof(png_struct)); - -#ifdef PNG_SETJMP_SUPPORTED - /* Restore jump buffer */ - png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf)); -#endif - - /* 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_destroy_struct((png_voidp)png_ptr); #endif - - /* 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_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: /* Do nothing */ break; - case Z_MEM_ERROR: - case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory"); break; - case Z_VERSION_ERROR: png_error(png_ptr, "zlib version"); break; - default: png_error(png_ptr, "Unknown zlib error"); + return (NULL); } png_ptr->zstream.next_out = png_ptr->zbuf; 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, NULL, NULL); + + + return (png_ptr); } -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* 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 * bytes read from the stream. You can tell libpng how many bytes have @@ -331,15 +205,21 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver, void PNGAPI 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) return; - png_debug(1, "in png_read_info"); + /* If we haven't checked all of the PNG signature bytes, do so now. */ if (png_ptr->sig_bytes < 8) { png_size_t num_checked = png_ptr->sig_bytes, num_to_check = 8 - num_checked; +#ifdef PNG_IO_STATE_SUPPORTED + png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE; +#endif + png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); png_ptr->sig_bytes = 8; @@ -357,63 +237,61 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) for (;;) { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_CONST PNG_IHDR; - PNG_CONST PNG_IDAT; - PNG_CONST PNG_IEND; - PNG_CONST PNG_PLTE; -#if defined(PNG_READ_bKGD_SUPPORTED) - PNG_CONST PNG_bKGD; + PNG_IHDR; + PNG_IDAT; + PNG_IEND; + PNG_PLTE; +#ifdef PNG_READ_bKGD_SUPPORTED + PNG_bKGD; #endif -#if defined(PNG_READ_cHRM_SUPPORTED) - PNG_CONST PNG_cHRM; +#ifdef PNG_READ_cHRM_SUPPORTED + PNG_cHRM; #endif -#if defined(PNG_READ_gAMA_SUPPORTED) - PNG_CONST PNG_gAMA; +#ifdef PNG_READ_gAMA_SUPPORTED + PNG_gAMA; #endif -#if defined(PNG_READ_hIST_SUPPORTED) - PNG_CONST PNG_hIST; +#ifdef PNG_READ_hIST_SUPPORTED + PNG_hIST; #endif -#if defined(PNG_READ_iCCP_SUPPORTED) - PNG_CONST PNG_iCCP; +#ifdef PNG_READ_iCCP_SUPPORTED + PNG_iCCP; #endif -#if defined(PNG_READ_iTXt_SUPPORTED) - PNG_CONST PNG_iTXt; +#ifdef PNG_READ_iTXt_SUPPORTED + PNG_iTXt; #endif -#if defined(PNG_READ_oFFs_SUPPORTED) - PNG_CONST PNG_oFFs; +#ifdef PNG_READ_oFFs_SUPPORTED + PNG_oFFs; #endif -#if defined(PNG_READ_pCAL_SUPPORTED) - PNG_CONST PNG_pCAL; +#ifdef PNG_READ_pCAL_SUPPORTED + PNG_pCAL; #endif -#if defined(PNG_READ_pHYs_SUPPORTED) - PNG_CONST PNG_pHYs; +#ifdef PNG_READ_pHYs_SUPPORTED + PNG_pHYs; #endif -#if defined(PNG_READ_sBIT_SUPPORTED) - PNG_CONST PNG_sBIT; +#ifdef PNG_READ_sBIT_SUPPORTED + PNG_sBIT; #endif -#if defined(PNG_READ_sCAL_SUPPORTED) - PNG_CONST PNG_sCAL; +#ifdef PNG_READ_sCAL_SUPPORTED + PNG_sCAL; #endif -#if defined(PNG_READ_sPLT_SUPPORTED) - PNG_CONST PNG_sPLT; +#ifdef PNG_READ_sPLT_SUPPORTED + PNG_sPLT; #endif -#if defined(PNG_READ_sRGB_SUPPORTED) - PNG_CONST PNG_sRGB; +#ifdef PNG_READ_sRGB_SUPPORTED + PNG_sRGB; #endif -#if defined(PNG_READ_tEXt_SUPPORTED) - PNG_CONST PNG_tEXt; +#ifdef PNG_READ_tEXt_SUPPORTED + PNG_tEXt; #endif -#if defined(PNG_READ_tIME_SUPPORTED) - PNG_CONST PNG_tIME; +#ifdef PNG_READ_tIME_SUPPORTED + PNG_tIME; #endif -#if defined(PNG_READ_tRNS_SUPPORTED) - PNG_CONST PNG_tRNS; +#ifdef PNG_READ_tRNS_SUPPORTED + PNG_tRNS; #endif -#if defined(PNG_READ_zTXt_SUPPORTED) - PNG_CONST PNG_zTXt; +#ifdef PNG_READ_zTXt_SUPPORTED + PNG_zTXt; #endif -#endif /* PNG_USE_LOCAL_ARRAYS */ png_uint_32 length = png_read_chunk_header(png_ptr); PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; @@ -461,71 +339,71 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) png_ptr->mode |= PNG_HAVE_IDAT; break; } -#if defined(PNG_READ_bKGD_SUPPORTED) +#ifdef PNG_READ_bKGD_SUPPORTED else if (!png_memcmp(chunk_name, png_bKGD, 4)) png_handle_bKGD(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_cHRM_SUPPORTED) +#ifdef PNG_READ_cHRM_SUPPORTED else if (!png_memcmp(chunk_name, png_cHRM, 4)) png_handle_cHRM(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_gAMA_SUPPORTED) +#ifdef PNG_READ_gAMA_SUPPORTED else if (!png_memcmp(chunk_name, png_gAMA, 4)) png_handle_gAMA(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_hIST_SUPPORTED) +#ifdef PNG_READ_hIST_SUPPORTED else if (!png_memcmp(chunk_name, png_hIST, 4)) png_handle_hIST(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_oFFs_SUPPORTED) +#ifdef PNG_READ_oFFs_SUPPORTED else if (!png_memcmp(chunk_name, png_oFFs, 4)) png_handle_oFFs(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_pCAL_SUPPORTED) +#ifdef PNG_READ_pCAL_SUPPORTED else if (!png_memcmp(chunk_name, png_pCAL, 4)) png_handle_pCAL(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sCAL_SUPPORTED) +#ifdef PNG_READ_sCAL_SUPPORTED else if (!png_memcmp(chunk_name, png_sCAL, 4)) png_handle_sCAL(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_pHYs_SUPPORTED) +#ifdef PNG_READ_pHYs_SUPPORTED else if (!png_memcmp(chunk_name, png_pHYs, 4)) png_handle_pHYs(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sBIT_SUPPORTED) +#ifdef PNG_READ_sBIT_SUPPORTED else if (!png_memcmp(chunk_name, png_sBIT, 4)) png_handle_sBIT(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sRGB_SUPPORTED) +#ifdef PNG_READ_sRGB_SUPPORTED else if (!png_memcmp(chunk_name, png_sRGB, 4)) png_handle_sRGB(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_iCCP_SUPPORTED) +#ifdef PNG_READ_iCCP_SUPPORTED else if (!png_memcmp(chunk_name, png_iCCP, 4)) png_handle_iCCP(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sPLT_SUPPORTED) +#ifdef PNG_READ_sPLT_SUPPORTED else if (!png_memcmp(chunk_name, png_sPLT, 4)) png_handle_sPLT(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_tEXt_SUPPORTED) +#ifdef PNG_READ_tEXt_SUPPORTED else if (!png_memcmp(chunk_name, png_tEXt, 4)) png_handle_tEXt(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_tIME_SUPPORTED) +#ifdef PNG_READ_tIME_SUPPORTED else if (!png_memcmp(chunk_name, png_tIME, 4)) png_handle_tIME(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_tRNS_SUPPORTED) +#ifdef PNG_READ_tRNS_SUPPORTED else if (!png_memcmp(chunk_name, png_tRNS, 4)) png_handle_tRNS(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_zTXt_SUPPORTED) +#ifdef PNG_READ_zTXt_SUPPORTED else if (!png_memcmp(chunk_name, png_zTXt, 4)) png_handle_zTXt(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_iTXt_SUPPORTED) +#ifdef PNG_READ_iTXt_SUPPORTED else if (!png_memcmp(chunk_name, png_iTXt, 4)) png_handle_iTXt(png_ptr, info_ptr, length); #endif @@ -533,13 +411,14 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) 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 */ void PNGAPI png_read_update_info(png_structp png_ptr, png_infop info_ptr) { png_debug(1, "in png_read_update_info"); + if (png_ptr == NULL) return; if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) @@ -547,10 +426,11 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr) else png_warning(png_ptr, "Ignoring extra png_read_update_info() call; row buffer not reallocated"); + png_read_transform_info(png_ptr, info_ptr); } -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Initialize palette, background, etc, after transformations * are set, but before any reading takes place. This allows * the user to obtain a gamma-corrected palette, for example. @@ -560,28 +440,30 @@ void PNGAPI png_start_read_image(png_structp png_ptr) { png_debug(1, "in png_start_read_image"); + if (png_ptr == NULL) return; if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) png_read_start_row(png_ptr); } -#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED void PNGAPI png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_CONST PNG_IDAT; + PNG_IDAT; PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; -#endif int ret; + if (png_ptr == NULL) return; + png_debug2(1, "in png_read_row (row %lu, pass %d)", - png_ptr->row_number, png_ptr->pass); + (unsigned long) png_ptr->row_number, png_ptr->pass); + if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) png_read_start_row(png_ptr); if (png_ptr->row_number == 0 && png_ptr->pass == 0) @@ -589,35 +471,35 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) /* Check for transforms that have been set but were defined out */ #if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED) if (png_ptr->transformations & PNG_INVERT_MONO) - png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) if (png_ptr->transformations & PNG_FILLER) - png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && !defined(PNG_READ_PACKSWAP_SUPPORTED) if (png_ptr->transformations & PNG_PACKSWAP) - png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) if (png_ptr->transformations & PNG_PACK) - png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) if (png_ptr->transformations & PNG_SHIFT) - png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) if (png_ptr->transformations & PNG_BGR) - png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) if (png_ptr->transformations & PNG_SWAP_BYTES) - png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined."); + png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined"); #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 (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) { @@ -724,7 +606,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) { if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || png_ptr->idat_size) - png_error(png_ptr, "Extra compressed data"); + png_benign_error(png_ptr, "Extra compressed data"); png_ptr->mode |= PNG_AFTER_IDAT; png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; break; @@ -748,10 +630,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_ptr->row_buf + 1, png_ptr->prev_row + 1, (int)(png_ptr->row_buf[0])); - png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf, - png_ptr->rowbytes + 1); + png_memcpy(png_ptr->prev_row, png_ptr->row_buf, 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) && (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) { @@ -764,7 +645,7 @@ 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)) png_do_read_transformations(png_ptr); -#if defined(PNG_READ_INTERLACING_SUPPORTED) +#ifdef PNG_READ_INTERLACING_SUPPORTED /* Blow up interlaced rows to full size */ if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) @@ -796,9 +677,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if (png_ptr->read_row_fn != NULL) (*(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 +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* 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 * contain the contents of the rows from the previous pass. If the @@ -832,6 +713,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row, png_bytepp dp; png_debug(1, "in png_read_rows"); + if (png_ptr == NULL) return; rp = row; @@ -848,20 +730,20 @@ png_read_rows(png_structp png_ptr, png_bytepp row, for (i = 0; i < num_rows; i++) { png_bytep rptr = *rp; - png_read_row(png_ptr, rptr, png_bytep_NULL); + png_read_row(png_ptr, rptr, NULL); rp++; } else if (dp != NULL) for (i = 0; i < num_rows; i++) { png_bytep dptr = *dp; - png_read_row(png_ptr, png_bytep_NULL, dptr); + png_read_row(png_ptr, NULL, dptr); dp++; } } -#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* 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 * initialize the image to the current image that PNG will be overlaying. @@ -882,6 +764,7 @@ png_read_image(png_structp png_ptr, png_bytepp image) png_bytepp rp; png_debug(1, "in png_read_image"); + if (png_ptr == NULL) return; @@ -890,7 +773,7 @@ png_read_image(png_structp png_ptr, png_bytepp image) #else if (png_ptr->interlaced) png_error(png_ptr, - "Cannot read interlaced image -- interlace handler disabled."); + "Cannot read interlaced image -- interlace handler disabled"); pass = 1; #endif @@ -903,14 +786,14 @@ png_read_image(png_structp png_ptr, png_bytepp image) rp = image; for (i = 0; i < image_height; i++) { - png_read_row(png_ptr, *rp, png_bytep_NULL); + png_read_row(png_ptr, *rp, NULL); rp++; } } } -#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* 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 * or time information at the end of the file, if info is not NULL. @@ -919,69 +802,68 @@ void PNGAPI png_read_end(png_structp png_ptr, png_infop info_ptr) { png_debug(1, "in png_read_end"); + if (png_ptr == NULL) return; png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ do { -#ifdef PNG_USE_LOCAL_ARRAYS - PNG_CONST PNG_IHDR; - PNG_CONST PNG_IDAT; - PNG_CONST PNG_IEND; - PNG_CONST PNG_PLTE; -#if defined(PNG_READ_bKGD_SUPPORTED) - PNG_CONST PNG_bKGD; + PNG_IHDR; + PNG_IDAT; + PNG_IEND; + PNG_PLTE; +#ifdef PNG_READ_bKGD_SUPPORTED + PNG_bKGD; #endif -#if defined(PNG_READ_cHRM_SUPPORTED) - PNG_CONST PNG_cHRM; +#ifdef PNG_READ_cHRM_SUPPORTED + PNG_cHRM; #endif -#if defined(PNG_READ_gAMA_SUPPORTED) - PNG_CONST PNG_gAMA; +#ifdef PNG_READ_gAMA_SUPPORTED + PNG_gAMA; #endif -#if defined(PNG_READ_hIST_SUPPORTED) - PNG_CONST PNG_hIST; +#ifdef PNG_READ_hIST_SUPPORTED + PNG_hIST; #endif -#if defined(PNG_READ_iCCP_SUPPORTED) - PNG_CONST PNG_iCCP; +#ifdef PNG_READ_iCCP_SUPPORTED + PNG_iCCP; #endif -#if defined(PNG_READ_iTXt_SUPPORTED) - PNG_CONST PNG_iTXt; +#ifdef PNG_READ_iTXt_SUPPORTED + PNG_iTXt; #endif -#if defined(PNG_READ_oFFs_SUPPORTED) - PNG_CONST PNG_oFFs; +#ifdef PNG_READ_oFFs_SUPPORTED + PNG_oFFs; #endif -#if defined(PNG_READ_pCAL_SUPPORTED) - PNG_CONST PNG_pCAL; +#ifdef PNG_READ_pCAL_SUPPORTED + PNG_pCAL; #endif -#if defined(PNG_READ_pHYs_SUPPORTED) - PNG_CONST PNG_pHYs; +#ifdef PNG_READ_pHYs_SUPPORTED + PNG_pHYs; #endif -#if defined(PNG_READ_sBIT_SUPPORTED) - PNG_CONST PNG_sBIT; +#ifdef PNG_READ_sBIT_SUPPORTED + PNG_sBIT; #endif -#if defined(PNG_READ_sCAL_SUPPORTED) - PNG_CONST PNG_sCAL; +#ifdef PNG_READ_sCAL_SUPPORTED + PNG_sCAL; #endif -#if defined(PNG_READ_sPLT_SUPPORTED) - PNG_CONST PNG_sPLT; +#ifdef PNG_READ_sPLT_SUPPORTED + PNG_sPLT; #endif -#if defined(PNG_READ_sRGB_SUPPORTED) - PNG_CONST PNG_sRGB; +#ifdef PNG_READ_sRGB_SUPPORTED + PNG_sRGB; #endif -#if defined(PNG_READ_tEXt_SUPPORTED) - PNG_CONST PNG_tEXt; +#ifdef PNG_READ_tEXt_SUPPORTED + PNG_tEXt; #endif -#if defined(PNG_READ_tIME_SUPPORTED) - PNG_CONST PNG_tIME; +#ifdef PNG_READ_tIME_SUPPORTED + PNG_tIME; #endif -#if defined(PNG_READ_tRNS_SUPPORTED) - PNG_CONST PNG_tRNS; +#ifdef PNG_READ_tRNS_SUPPORTED + PNG_tRNS; #endif -#if defined(PNG_READ_zTXt_SUPPORTED) - PNG_CONST PNG_zTXt; +#ifdef PNG_READ_zTXt_SUPPORTED + PNG_zTXt; #endif -#endif /* PNG_USE_LOCAL_ARRAYS */ png_uint_32 length = png_read_chunk_header(png_ptr); PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; @@ -995,7 +877,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) if (!png_memcmp(chunk_name, png_IDAT, 4)) { if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - png_error(png_ptr, "Too many IDAT's found"); + png_benign_error(png_ptr, "Too many IDATs found"); } png_handle_unknown(png_ptr, info_ptr, length); if (!png_memcmp(chunk_name, png_PLTE, 4)) @@ -1008,76 +890,76 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) * read, but not after other chunks have been read. */ if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - png_error(png_ptr, "Too many IDAT's found"); + png_benign_error(png_ptr, "Too many IDATs found"); png_crc_finish(png_ptr, length); } else if (!png_memcmp(chunk_name, png_PLTE, 4)) 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)) png_handle_bKGD(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_cHRM_SUPPORTED) +#ifdef PNG_READ_cHRM_SUPPORTED else if (!png_memcmp(chunk_name, png_cHRM, 4)) png_handle_cHRM(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_gAMA_SUPPORTED) +#ifdef PNG_READ_gAMA_SUPPORTED else if (!png_memcmp(chunk_name, png_gAMA, 4)) png_handle_gAMA(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_hIST_SUPPORTED) +#ifdef PNG_READ_hIST_SUPPORTED else if (!png_memcmp(chunk_name, png_hIST, 4)) png_handle_hIST(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_oFFs_SUPPORTED) +#ifdef PNG_READ_oFFs_SUPPORTED else if (!png_memcmp(chunk_name, png_oFFs, 4)) png_handle_oFFs(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_pCAL_SUPPORTED) +#ifdef PNG_READ_pCAL_SUPPORTED else if (!png_memcmp(chunk_name, png_pCAL, 4)) png_handle_pCAL(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sCAL_SUPPORTED) +#ifdef PNG_READ_sCAL_SUPPORTED else if (!png_memcmp(chunk_name, png_sCAL, 4)) png_handle_sCAL(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_pHYs_SUPPORTED) +#ifdef PNG_READ_pHYs_SUPPORTED else if (!png_memcmp(chunk_name, png_pHYs, 4)) png_handle_pHYs(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sBIT_SUPPORTED) +#ifdef PNG_READ_sBIT_SUPPORTED else if (!png_memcmp(chunk_name, png_sBIT, 4)) png_handle_sBIT(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sRGB_SUPPORTED) +#ifdef PNG_READ_sRGB_SUPPORTED else if (!png_memcmp(chunk_name, png_sRGB, 4)) png_handle_sRGB(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_iCCP_SUPPORTED) +#ifdef PNG_READ_iCCP_SUPPORTED else if (!png_memcmp(chunk_name, png_iCCP, 4)) png_handle_iCCP(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_sPLT_SUPPORTED) +#ifdef PNG_READ_sPLT_SUPPORTED else if (!png_memcmp(chunk_name, png_sPLT, 4)) png_handle_sPLT(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_tEXt_SUPPORTED) +#ifdef PNG_READ_tEXt_SUPPORTED else if (!png_memcmp(chunk_name, png_tEXt, 4)) png_handle_tEXt(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_tIME_SUPPORTED) +#ifdef PNG_READ_tIME_SUPPORTED else if (!png_memcmp(chunk_name, png_tIME, 4)) png_handle_tIME(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_tRNS_SUPPORTED) +#ifdef PNG_READ_tRNS_SUPPORTED else if (!png_memcmp(chunk_name, png_tRNS, 4)) png_handle_tRNS(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_zTXt_SUPPORTED) +#ifdef PNG_READ_zTXt_SUPPORTED else if (!png_memcmp(chunk_name, png_zTXt, 4)) png_handle_zTXt(png_ptr, info_ptr, length); #endif -#if defined(PNG_READ_iTXt_SUPPORTED) +#ifdef PNG_READ_iTXt_SUPPORTED else if (!png_memcmp(chunk_name, png_iTXt, 4)) png_handle_iTXt(png_ptr, info_ptr, length); #endif @@ -1085,7 +967,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) png_handle_unknown(png_ptr, info_ptr, length); } 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 */ void PNGAPI @@ -1100,6 +982,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, #endif png_debug(1, "in png_destroy_read_struct"); + if (png_ptr_ptr != NULL) png_ptr = *png_ptr_ptr; if (png_ptr == NULL) @@ -1120,7 +1003,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, if (info_ptr != NULL) { -#if defined(PNG_TEXT_SUPPORTED) +#ifdef PNG_TEXT_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); #endif @@ -1135,7 +1018,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, 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); #endif #ifdef PNG_USER_MEM_SUPPORTED @@ -1174,6 +1057,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr #endif png_debug(1, "in png_read_destroy"); + if (info_ptr != NULL) png_info_destroy(png_ptr, info_ptr); @@ -1184,50 +1068,32 @@ 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->prev_row); 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->dither_index); #endif -#if defined(PNG_READ_GAMMA_SUPPORTED) +#ifdef PNG_READ_GAMMA_SUPPORTED png_free(png_ptr, png_ptr->gamma_table); #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_to_1); #endif -#ifdef PNG_FREE_ME_SUPPORTED if (png_ptr->free_me & PNG_FREE_PLTE) png_zfree(png_ptr, png_ptr->palette); png_ptr->free_me &= ~PNG_FREE_PLTE; -#else - if (png_ptr->flags & PNG_FLAG_FREE_PLTE) - png_zfree(png_ptr, png_ptr->palette); - png_ptr->flags &= ~PNG_FLAG_FREE_PLTE; -#endif #if defined(PNG_tRNS_SUPPORTED) || \ defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) -#ifdef PNG_FREE_ME_SUPPORTED if (png_ptr->free_me & PNG_FREE_TRNS) - png_free(png_ptr, png_ptr->trans); + png_free(png_ptr, png_ptr->trans_alpha); png_ptr->free_me &= ~PNG_FREE_TRNS; -#else - if (png_ptr->flags & PNG_FLAG_FREE_TRNS) - png_free(png_ptr, png_ptr->trans); - png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; -#endif #endif -#if defined(PNG_READ_hIST_SUPPORTED) -#ifdef PNG_FREE_ME_SUPPORTED +#ifdef PNG_READ_hIST_SUPPORTED if (png_ptr->free_me & PNG_FREE_HIST) png_free(png_ptr, png_ptr->hist); png_ptr->free_me &= ~PNG_FREE_HIST; -#else - if (png_ptr->flags & PNG_FLAG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); - png_ptr->flags &= ~PNG_FLAG_FREE_HIST; #endif -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) +#ifdef PNG_READ_GAMMA_SUPPORTED if (png_ptr->gamma_16_table != NULL) { int i; @@ -1238,7 +1104,7 @@ 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); } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) +#ifdef PNG_READ_BACKGROUND_SUPPORTED if (png_ptr->gamma_16_from_1 != NULL) { int i; @@ -1261,7 +1127,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr } #endif #endif -#if defined(PNG_TIME_RFC1123_SUPPORTED) +#ifdef PNG_TIME_RFC1123_SUPPORTED png_free(png_ptr, png_ptr->time_buffer); #endif @@ -1314,8 +1180,8 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) } -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED -#if defined(PNG_INFO_IMAGE_SUPPORTED) +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms, @@ -1325,12 +1191,6 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, if (png_ptr == NULL) return; -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) - /* Invert the alpha channel from opacity to transparency - */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) - png_set_invert_alpha(png_ptr); -#endif /* png_read_info() gives us all of the information from the * PNG file before the first IDAT (image data chunk). @@ -1341,14 +1201,14 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, /* -------------- 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. */ if (transforms & PNG_TRANSFORM_STRIP_16) png_set_strip_16(png_ptr); #endif -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED /* Strip alpha bytes from the input data without combining with * the background (not recommended). */ @@ -1364,7 +1224,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, png_set_packing(png_ptr); #endif -#if defined(PNG_READ_PACKSWAP_SUPPORTED) +#ifdef PNG_READ_PACKSWAP_SUPPORTED /* Change the order of packed pixels to least significant bit first * (not useful if you are using png_set_packing). */ @@ -1372,7 +1232,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, png_set_packswap(png_ptr); #endif -#if defined(PNG_READ_EXPAND_SUPPORTED) +#ifdef PNG_READ_EXPAND_SUPPORTED /* Expand paletted colors into true RGB triplets * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel * Expand paletted or RGB images with transparency to full alpha @@ -1388,14 +1248,14 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, /* 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 */ if (transforms & PNG_TRANSFORM_INVERT_MONO) png_set_invert_mono(png_ptr); #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 * [0,65535] to the original [0,7] or [0,31], or whatever range the * colors were originally in: @@ -1410,27 +1270,43 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, } #endif -#if defined(PNG_READ_BGR_SUPPORTED) +#ifdef PNG_READ_BGR_SUPPORTED /* Flip the RGB pixels to BGR (or RGBA to BGRA) */ if (transforms & PNG_TRANSFORM_BGR) png_set_bgr(png_ptr); #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) */ if (transforms & PNG_TRANSFORM_SWAP_ALPHA) png_set_swap_alpha(png_ptr); #endif -#if defined(PNG_READ_SWAP_SUPPORTED) +#ifdef PNG_READ_SWAP_SUPPORTED /* Swap bytes of 16 bit files to least significant byte first */ if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) png_set_swap(png_ptr); #endif +/* Added at libpng-1.2.41 */ +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + /* Invert the alpha channel from opacity to transparency + */ + if (transforms & PNG_TRANSFORM_INVERT_ALPHA) + png_set_invert_alpha(png_ptr); +#endif + +/* Added at libpng-1.2.41 */ +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* Expand grayscale image to RGB + */ + if (transforms & PNG_TRANSFORM_GRAY_TO_RGB) + png_set_gray_to_rgb(png_ptr); +#endif + /* We don't handle adding filler bytes */ /* Optional call to gamma correct and add the background to the palette @@ -1441,18 +1317,18 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, /* -------------- image transformations end here ------------------- */ -#ifdef PNG_FREE_ME_SUPPORTED png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); -#endif if (info_ptr->row_pointers == NULL) { + png_uint_32 iptr; + info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, info_ptr->height * png_sizeof(png_bytep)); - png_memset(info_ptr->row_pointers, 0, info_ptr->height - * png_sizeof(png_bytep)); -#ifdef PNG_FREE_ME_SUPPORTED + for (iptr=0; iptr<info_ptr->height; iptr++) + info_ptr->row_pointers[iptr] = NULL; + info_ptr->free_me |= PNG_FREE_ROWS; -#endif + for (row = 0; row < (int)info_ptr->height; row++) info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); @@ -1469,5 +1345,5 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, } #endif /* PNG_INFO_IMAGE_SUPPORTED */ -#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ #endif /* PNG_READ_SUPPORTED */ |