diff options
Diffstat (limited to 'third_party/libpng16/pngwrite.c')
| -rw-r--r-- | third_party/libpng16/pngwrite.c | 173 |
1 files changed, 78 insertions, 95 deletions
diff --git a/third_party/libpng16/pngwrite.c b/third_party/libpng16/pngwrite.c index e25e5dcfdc..181a899438 100644 --- a/third_party/libpng16/pngwrite.c +++ b/third_party/libpng16/pngwrite.c @@ -1,8 +1,8 @@ /* pngwrite.c - general routines to write a PNG file * - * Last changed in libpng 1.6.32 [August 24, 2017] - * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson + * Last changed in libpng 1.6.19 [November 12, 2015] + * Copyright (c) 1998-2002,2004,2006-2015 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.) * @@ -22,7 +22,7 @@ /* Write out all the unknown chunks for the current given location */ static void write_unknown_chunks(png_structrp png_ptr, png_const_inforp info_ptr, - unsigned int where) + unsigned int where) { if (info_ptr->unknown_chunks_num != 0) { @@ -148,11 +148,11 @@ png_write_info_before_PLTE(png_structrp png_ptr, png_const_inforp info_ptr) # ifdef PNG_WRITE_sRGB_SUPPORTED if ((info_ptr->valid & PNG_INFO_sRGB) != 0) png_app_warning(png_ptr, - "profile matches sRGB but writing iCCP instead"); + "profile matches sRGB but writing iCCP instead"); # endif png_write_iCCP(png_ptr, info_ptr->iccp_name, - info_ptr->iccp_profile); + info_ptr->iccp_profile); } # ifdef PNG_WRITE_sRGB_SUPPORTED else @@ -237,11 +237,6 @@ png_write_info(png_structrp png_ptr, png_const_inforp info_ptr) png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); #endif -#ifdef PNG_WRITE_eXIf_SUPPORTED - if ((info_ptr->valid & PNG_INFO_eXIf) != 0) - png_write_eXIf(png_ptr, info_ptr->exif, info_ptr->num_exif); -#endif - #ifdef PNG_WRITE_hIST_SUPPORTED if ((info_ptr->valid & PNG_INFO_hIST) != 0) png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); @@ -388,7 +383,7 @@ png_write_end(png_structrp png_ptr, png_inforp info_ptr) for (i = 0; i < info_ptr->num_text; i++) { png_debug2(2, "Writing trailer text chunk %d, type %d", i, - info_ptr->text[i].compression); + info_ptr->text[i].compression); /* An internationalized chunk? */ if (info_ptr->text[i].compression > 0) { @@ -437,12 +432,6 @@ png_write_end(png_structrp png_ptr, png_inforp info_ptr) } } #endif - -#ifdef PNG_WRITE_eXIf_SUPPORTED - if ((info_ptr->valid & PNG_INFO_eXIf) != 0) - png_write_eXIf(png_ptr, info_ptr->exif, info_ptr->num_exif); -#endif - #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED write_unknown_chunks(png_ptr, info_ptr, PNG_AFTER_IDAT); #endif @@ -677,9 +666,9 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row) for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) { - png_uint_32 s0 = (png_uint_32)(*(rp ) << 8) | *(rp + 1); - png_uint_32 s1 = (png_uint_32)(*(rp + 2) << 8) | *(rp + 3); - png_uint_32 s2 = (png_uint_32)(*(rp + 4) << 8) | *(rp + 5); + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); *(rp ) = (png_byte)(red >> 8); @@ -704,7 +693,7 @@ png_write_row(png_structrp png_ptr, png_const_bytep row) return; png_debug2(1, "in png_write_row (row %u, pass %d)", - png_ptr->row_number, png_ptr->pass); + png_ptr->row_number, png_ptr->pass); /* Initialize transformations and other stuff if first time */ if (png_ptr->row_number == 0 && png_ptr->pass == 0) @@ -912,7 +901,7 @@ png_set_flush(png_structrp png_ptr, int nrows) if (png_ptr == NULL) return; - png_ptr->flush_dist = (nrows < 0 ? 0 : (png_uint_32)nrows); + png_ptr->flush_dist = (nrows < 0 ? 0 : nrows); } /* Flush the current output buffers now */ @@ -948,10 +937,6 @@ png_write_destroy(png_structrp png_ptr) png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); png_free(png_ptr, png_ptr->row_buf); png_ptr->row_buf = NULL; -#ifdef PNG_READ_EXPANDED_SUPPORTED - png_free(png_ptr, png_ptr->riffled_palette); - png_ptr->riffled_palette = NULL; -#endif #ifdef PNG_WRITE_FILTER_SUPPORTED png_free(png_ptr, png_ptr->prev_row); png_free(png_ptr, png_ptr->try_row); @@ -1022,8 +1007,8 @@ png_set_filter(png_structrp png_ptr, int method, int filters) case 5: case 6: case 7: png_app_error(png_ptr, "Unknown row filter for method 0"); + /* FALL THROUGH */ #endif /* WRITE_FILTER */ - /* FALLTHROUGH */ case PNG_FILTER_VALUE_NONE: png_ptr->do_filter = PNG_FILTER_NONE; break; @@ -1084,7 +1069,7 @@ png_set_filter(png_structrp png_ptr, int method, int filters) * is not available so the filter can't be used. Just warn here. */ png_app_warning(png_ptr, - "png_set_filter: UP/AVG/PAETH cannot be added after start"); + "png_set_filter: UP/AVG/PAETH cannot be added after start"); filters &= ~(PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH); } @@ -1110,13 +1095,13 @@ png_set_filter(png_structrp png_ptr, int method, int filters) if (png_ptr->try_row == NULL) png_ptr->try_row = png_voidcast(png_bytep, - png_malloc(png_ptr, buf_size)); + png_malloc(png_ptr, buf_size)); if (num_filters > 1) { if (png_ptr->tst_row == NULL) png_ptr->tst_row = png_voidcast(png_bytep, - png_malloc(png_ptr, buf_size)); + png_malloc(png_ptr, buf_size)); } } png_ptr->do_filter = (png_byte)filters; @@ -1540,8 +1525,7 @@ png_write_image_16bit(png_voidp argument) display->first_row); png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row); png_uint_16p row_end; - const unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? - 3 : 1; + const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; int aindex = 0; png_uint_32 y = image->height; @@ -1555,9 +1539,9 @@ png_write_image_16bit(png_voidp argument) ++output_row; } else - aindex = (int)channels; + aindex = channels; # else - aindex = (int)channels; + aindex = channels; # endif } @@ -1570,7 +1554,7 @@ png_write_image_16bit(png_voidp argument) */ row_end = output_row + image->width * (channels+1); - for (; y > 0; --y) + while (y-- > 0) { png_const_uint_16p in_ptr = input_row; png_uint_16p out_ptr = output_row; @@ -1591,7 +1575,7 @@ png_write_image_16bit(png_voidp argument) if (alpha > 0 && alpha < 65535) reciprocal = ((0xffff<<15)+(alpha>>1))/alpha; - c = (int)channels; + c = channels; do /* always at least one channel */ { png_uint_16 component = *in_ptr++; @@ -1626,7 +1610,7 @@ png_write_image_16bit(png_voidp argument) } png_write_row(png_ptr, png_voidcast(png_const_bytep, display->local_row)); - input_row += (png_uint_16)display->row_bytes/(sizeof (png_uint_16)); + input_row += display->row_bytes/(sizeof (png_uint_16)); } return 1; @@ -1644,7 +1628,7 @@ png_write_image_16bit(png_voidp argument) static png_byte png_unpremultiply(png_uint_32 component, png_uint_32 alpha, - png_uint_32 reciprocal/*from the above macro*/) + png_uint_32 reciprocal/*from the above macro*/) { /* The following gives 1.0 for an alpha of 0, which is fine, otherwise if 0/0 * is represented as some other value there is more likely to be a @@ -1699,8 +1683,7 @@ png_write_image_8bit(png_voidp argument) display->first_row); png_bytep output_row = png_voidcast(png_bytep, display->local_row); png_uint_32 y = image->height; - const unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? - 3 : 1; + const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0) { @@ -1717,12 +1700,12 @@ png_write_image_8bit(png_voidp argument) else # endif - aindex = (int)channels; + aindex = channels; /* Use row_end in place of a loop counter: */ row_end = output_row + image->width * (channels+1); - for (; y > 0; --y) + while (y-- > 0) { png_const_uint_16p in_ptr = input_row; png_bytep out_ptr = output_row; @@ -1740,7 +1723,7 @@ png_write_image_8bit(png_voidp argument) if (alphabyte > 0 && alphabyte < 255) reciprocal = UNP_RECIPROCAL(alpha); - c = (int)channels; + c = channels; do /* always at least one channel */ *out_ptr++ = png_unpremultiply(*in_ptr++, alpha, reciprocal); while (--c > 0); @@ -1752,7 +1735,7 @@ png_write_image_8bit(png_voidp argument) png_write_row(png_ptr, png_voidcast(png_const_bytep, display->local_row)); - input_row += (png_uint_16)display->row_bytes/(sizeof (png_uint_16)); + input_row += display->row_bytes/(sizeof (png_uint_16)); } /* while y */ } @@ -1763,7 +1746,7 @@ png_write_image_8bit(png_voidp argument) */ png_bytep row_end = output_row + image->width * channels; - for (; y > 0; --y) + while (y-- > 0) { png_const_uint_16p in_ptr = input_row; png_bytep out_ptr = output_row; @@ -1777,7 +1760,7 @@ png_write_image_8bit(png_voidp argument) } png_write_row(png_ptr, output_row); - input_row += (png_uint_16)display->row_bytes/(sizeof (png_uint_16)); + input_row += display->row_bytes/(sizeof (png_uint_16)); } } @@ -1794,7 +1777,7 @@ png_image_set_PLTE(png_image_write_control *display) /* NOTE: the caller must check for cmap != NULL and entries != 0 */ const png_uint_32 format = image->format; - const unsigned int channels = PNG_IMAGE_SAMPLE_CHANNELS(format); + const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format); # if defined(PNG_FORMAT_BGR_SUPPORTED) &&\ defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED) @@ -1826,7 +1809,7 @@ png_image_set_PLTE(png_image_write_control *display) { png_const_uint_16p entry = png_voidcast(png_const_uint_16p, cmap); - entry += (unsigned int)i * channels; + entry += i * channels; if ((channels & 1) != 0) /* no alpha */ { @@ -1865,16 +1848,16 @@ png_image_set_PLTE(png_image_write_control *display) if (channels >= 3) /* RGB */ { palette[i].blue = png_unpremultiply(entry[afirst + (2 ^ bgr)], - alpha, reciprocal); + alpha, reciprocal); palette[i].green = png_unpremultiply(entry[afirst + 1], alpha, - reciprocal); + reciprocal); palette[i].red = png_unpremultiply(entry[afirst + bgr], alpha, - reciprocal); + reciprocal); } else /* gray */ palette[i].blue = palette[i].red = palette[i].green = - png_unpremultiply(entry[afirst], alpha, reciprocal); + png_unpremultiply(entry[afirst], alpha, reciprocal); } } @@ -1882,7 +1865,7 @@ png_image_set_PLTE(png_image_write_control *display) { png_const_bytep entry = png_voidcast(png_const_bytep, cmap); - entry += (unsigned int)i * channels; + entry += i * channels; switch (channels) { @@ -1890,7 +1873,7 @@ png_image_set_PLTE(png_image_write_control *display) tRNS[i] = entry[afirst ? 0 : 3]; if (tRNS[i] < 255) num_trans = i+1; - /* FALLTHROUGH */ + /* FALL THROUGH */ case 3: palette[i].blue = entry[afirst + (2 ^ bgr)]; palette[i].green = entry[afirst + 1]; @@ -1901,7 +1884,7 @@ png_image_set_PLTE(png_image_write_control *display) tRNS[i] = entry[1 ^ afirst]; if (tRNS[i] < 255) num_trans = i+1; - /* FALLTHROUGH */ + /* FALL THROUGH */ case 1: palette[i].blue = palette[i].red = palette[i].green = entry[afirst]; @@ -1921,20 +1904,20 @@ png_image_set_PLTE(png_image_write_control *display) # endif png_set_PLTE(image->opaque->png_ptr, image->opaque->info_ptr, palette, - entries); + entries); if (num_trans > 0) png_set_tRNS(image->opaque->png_ptr, image->opaque->info_ptr, tRNS, - num_trans, NULL); + num_trans, NULL); - image->colormap_entries = (png_uint_32)entries; + image->colormap_entries = entries; } static int png_image_write_main(png_voidp argument) { png_image_write_control *display = png_voidcast(png_image_write_control*, - argument); + argument); png_imagep image = display->image; png_structrp png_ptr = image->opaque->png_ptr; png_inforp info_ptr = image->opaque->info_ptr; @@ -1944,7 +1927,7 @@ png_image_write_main(png_voidp argument) int colormap = (format & PNG_FORMAT_FLAG_COLORMAP); int linear = !colormap && (format & PNG_FORMAT_FLAG_LINEAR); /* input */ int alpha = !colormap && (format & PNG_FORMAT_FLAG_ALPHA); - int write_16bit = linear && (display->convert_to_8bit == 0); + int write_16bit = linear && !colormap && (display->convert_to_8bit == 0); # ifdef PNG_BENIGN_ERRORS_SUPPORTED /* Make sure we error out on any bad situation */ @@ -1957,7 +1940,7 @@ png_image_write_main(png_voidp argument) { const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format); - if (image->width <= 0x7fffffffU/channels) /* no overflow */ + if (image->width <= 0x7FFFFFFFU/channels) /* no overflow */ { png_uint_32 check; const png_uint_32 png_row_stride = image->width * channels; @@ -1966,10 +1949,10 @@ png_image_write_main(png_voidp argument) display->row_stride = (png_int_32)/*SAFE*/png_row_stride; if (display->row_stride < 0) - check = (png_uint_32)(-display->row_stride); + check = -display->row_stride; else - check = (png_uint_32)display->row_stride; + check = display->row_stride; if (check >= png_row_stride) { @@ -1977,7 +1960,7 @@ png_image_write_main(png_voidp argument) * limits the whole image size to 32 bits for API compatibility with * the current, 32-bit, PNG_IMAGE_BUFFER_SIZE macro. */ - if (image->height > 0xffffffffU/png_row_stride) + if (image->height > 0xFFFFFFFF/png_row_stride) png_error(image->opaque->png_ptr, "memory image too large"); } @@ -1997,24 +1980,24 @@ png_image_write_main(png_voidp argument) png_uint_32 entries = image->colormap_entries; png_set_IHDR(png_ptr, info_ptr, image->width, image->height, - entries > 16 ? 8 : (entries > 4 ? 4 : (entries > 2 ? 2 : 1)), - PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + entries > 16 ? 8 : (entries > 4 ? 4 : (entries > 2 ? 2 : 1)), + PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); png_image_set_PLTE(display); } else png_error(image->opaque->png_ptr, - "no color-map for color-mapped image"); + "no color-map for color-mapped image"); } else png_set_IHDR(png_ptr, info_ptr, image->width, image->height, - write_16bit ? 16 : 8, - ((format & PNG_FORMAT_FLAG_COLOR) ? PNG_COLOR_MASK_COLOR : 0) + - ((format & PNG_FORMAT_FLAG_ALPHA) ? PNG_COLOR_MASK_ALPHA : 0), - PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + write_16bit ? 16 : 8, + ((format & PNG_FORMAT_FLAG_COLOR) ? PNG_COLOR_MASK_COLOR : 0) + + ((format & PNG_FORMAT_FLAG_ALPHA) ? PNG_COLOR_MASK_ALPHA : 0), + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); /* Counter-intuitively the data transformations must be called *after* * png_write_info, not before as in the read code, but the 'set' functions @@ -2029,11 +2012,11 @@ png_image_write_main(png_voidp argument) if ((image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB) == 0) png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 ); } @@ -2127,7 +2110,7 @@ png_image_write_main(png_voidp argument) (colormap == 0 && display->convert_to_8bit != 0)) { png_bytep row = png_voidcast(png_bytep, png_malloc(png_ptr, - png_get_rowbytes(png_ptr, info_ptr))); + png_get_rowbytes(png_ptr, info_ptr))); int result; display->local_row = row; @@ -2153,7 +2136,7 @@ png_image_write_main(png_voidp argument) ptrdiff_t row_bytes = display->row_bytes; png_uint_32 y = image->height; - for (; y > 0; --y) + while (y-- > 0) { png_write_row(png_ptr, row); row += row_bytes; @@ -2167,10 +2150,10 @@ png_image_write_main(png_voidp argument) static void (PNGCBAPI image_memory_write)(png_structp png_ptr, png_bytep/*const*/ data, - png_size_t size) + png_size_t size) { png_image_write_control *display = png_voidcast(png_image_write_control*, - png_ptr->io_ptr/*backdoor: png_get_io_ptr(png_ptr)*/); + png_ptr->io_ptr/*backdoor: png_get_io_ptr(png_ptr)*/); const png_alloc_size_t ob = display->output_bytes; /* Check for overflow; this should never happen: */ @@ -2201,22 +2184,22 @@ static int png_image_write_memory(png_voidp argument) { png_image_write_control *display = png_voidcast(png_image_write_control*, - argument); + argument); /* The rest of the memory-specific init and write_main in an error protected * environment. This case needs to use callbacks for the write operations * since libpng has no built in support for writing to memory. */ png_set_write_fn(display->image->opaque->png_ptr, display/*io_ptr*/, - image_memory_write, image_memory_flush); + image_memory_write, image_memory_flush); return png_image_write_main(display); } int PNGAPI png_image_write_to_memory(png_imagep image, void *memory, - png_alloc_size_t * PNG_RESTRICT memory_bytes, int convert_to_8bit, - const void *buffer, png_int_32 row_stride, const void *colormap) + png_alloc_size_t * PNG_RESTRICT memory_bytes, int convert_to_8bit, + const void *buffer, png_int_32 row_stride, const void *colormap) { /* Write the image to the given buffer, or count the bytes if it is NULL */ if (image != NULL && image->version == PNG_IMAGE_VERSION) @@ -2268,12 +2251,12 @@ png_image_write_to_memory(png_imagep image, void *memory, else return png_image_error(image, - "png_image_write_to_memory: invalid argument"); + "png_image_write_to_memory: invalid argument"); } else if (image != NULL) return png_image_error(image, - "png_image_write_to_memory: incorrect PNG_IMAGE_VERSION"); + "png_image_write_to_memory: incorrect PNG_IMAGE_VERSION"); else return 0; @@ -2282,7 +2265,7 @@ png_image_write_to_memory(png_imagep image, void *memory, #ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED int PNGAPI png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit, - const void *buffer, png_int_32 row_stride, const void *colormap) + const void *buffer, png_int_32 row_stride, const void *colormap) { /* Write the image to the given (FILE*). */ if (image != NULL && image->version == PNG_IMAGE_VERSION) @@ -2318,12 +2301,12 @@ png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit, else return png_image_error(image, - "png_image_write_to_stdio: invalid argument"); + "png_image_write_to_stdio: invalid argument"); } else if (image != NULL) return png_image_error(image, - "png_image_write_to_stdio: incorrect PNG_IMAGE_VERSION"); + "png_image_write_to_stdio: incorrect PNG_IMAGE_VERSION"); else return 0; @@ -2331,8 +2314,8 @@ png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit, int PNGAPI png_image_write_to_file(png_imagep image, const char *file_name, - int convert_to_8bit, const void *buffer, png_int_32 row_stride, - const void *colormap) + int convert_to_8bit, const void *buffer, png_int_32 row_stride, + const void *colormap) { /* Write the image to the named file. */ if (image != NULL && image->version == PNG_IMAGE_VERSION) @@ -2344,7 +2327,7 @@ png_image_write_to_file(png_imagep image, const char *file_name, if (fp != NULL) { if (png_image_write_to_stdio(image, fp, convert_to_8bit, buffer, - row_stride, colormap) != 0) + row_stride, colormap) != 0) { int error; /* from fflush/fclose */ @@ -2385,12 +2368,12 @@ png_image_write_to_file(png_imagep image, const char *file_name, else return png_image_error(image, - "png_image_write_to_file: invalid argument"); + "png_image_write_to_file: invalid argument"); } else if (image != NULL) return png_image_error(image, - "png_image_write_to_file: incorrect PNG_IMAGE_VERSION"); + "png_image_write_to_file: incorrect PNG_IMAGE_VERSION"); else return 0; |