diff options
Diffstat (limited to 'thirdparty/libpng/pngread.c')
| -rw-r--r-- | thirdparty/libpng/pngread.c | 58 |
1 files changed, 37 insertions, 21 deletions
diff --git a/thirdparty/libpng/pngread.c b/thirdparty/libpng/pngread.c index 87a78915..48aae848 100644 --- a/thirdparty/libpng/pngread.c +++ b/thirdparty/libpng/pngread.c @@ -1,8 +1,8 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.6.15 [November 20, 2014] - * Copyright (c) 1998-2014 Glenn Randers-Pehrson + * Last changed in libpng 1.6.17 [March 26, 2015] + * Copyright (c) 1998-2015 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.) * @@ -63,7 +63,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, /* In stable builds only warn if an application error can be completely * handled. */ -# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC +# if PNG_RELEASE_BUILD png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; # endif # endif @@ -814,8 +814,7 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr) /* Zero length IDATs are legal after the last IDAT has been * read, but not after other chunks have been read. */ - if ((length > 0) || - (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0) + if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0) png_benign_error(png_ptr, "Too many IDATs found"); png_crc_finish(png_ptr, length); @@ -1044,9 +1043,9 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr, /* Tell libpng to strip 16-bit/color files down to 8 bits per color. */ if ((transforms & PNG_TRANSFORM_SCALE_16) != 0) - /* Added at libpng-1.5.4. "strip_16" produces the same result that it - * did in earlier versions, while "scale_16" is now more accurate. - */ + /* Added at libpng-1.5.4. "strip_16" produces the same result that it + * did in earlier versions, while "scale_16" is now more accurate. + */ #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED png_set_scale_16(png_ptr); #else @@ -1210,7 +1209,7 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr, for (iptr = 0; iptr < info_ptr->height; iptr++) info_ptr->row_pointers[iptr] = png_voidcast(png_bytep, - png_malloc(png_ptr, info_ptr->rowbytes)); + png_malloc(png_ptr, info_ptr->rowbytes)); } png_read_image(png_ptr, info_ptr->row_pointers); @@ -1684,10 +1683,11 @@ decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding) value *= 257; break; +#ifdef __GNUC__ default: png_error(display->image->opaque->png_ptr, "unexpected encoding (internal error)"); - break; +#endif } return value; @@ -1824,6 +1824,7 @@ png_create_colormap_entry(png_image_read_control *display, y = (y + 128) >> 8; y *= 255; y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7); + alpha = PNG_DIV257(alpha); encoding = P_sRGB; } @@ -2286,8 +2287,14 @@ png_image_read_colormap(png_voidp argument) output_processing = PNG_CMAP_NONE; break; } - +#ifdef __COVERITY__ + /* Coverity claims that output_encoding cannot be 2 (P_LINEAR) + * here. + */ + back_alpha = 255; +#else back_alpha = output_encoding == P_LINEAR ? 65535 : 255; +#endif } /* output_processing means that the libpng-processed row will be @@ -2412,7 +2419,14 @@ png_image_read_colormap(png_voidp argument) */ background_index = i; png_create_colormap_entry(display, i++, back_r, back_g, back_b, - output_encoding == P_LINEAR ? 65535U : 255U, output_encoding); +#ifdef __COVERITY__ + /* Coverity claims that output_encoding cannot be 2 (P_LINEAR) + * here. + */ 255U, +#else + output_encoding == P_LINEAR ? 65535U : 255U, +#endif + output_encoding); /* For non-opaque input composite on the sRGB background - this * requires inverting the encoding for each component. The input @@ -2834,10 +2848,6 @@ png_image_read_colormap(png_voidp argument) switch (data_encoding) { - default: - png_error(png_ptr, "bad data option (internal error)"); - break; - case P_sRGB: /* Change to 8-bit sRGB */ png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB); @@ -2847,6 +2857,11 @@ png_image_read_colormap(png_voidp argument) if (png_ptr->bit_depth > 8) png_set_scale_16(png_ptr); break; + +#ifdef __GNUC__ + default: + png_error(png_ptr, "bad data option (internal error)"); +#endif } if (cmap_entries > 256 || cmap_entries > image->colormap_entries) @@ -3246,7 +3261,7 @@ png_image_read_composite(png_voidp argument) png_uint_32 width = image->width; ptrdiff_t step_row = display->row_bytes; unsigned int channels = - (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; + (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; int pass; for (pass = 0; pass < passes; ++pass) @@ -3397,10 +3412,6 @@ png_image_read_background(png_voidp argument) */ switch (info_ptr->bit_depth) { - default: - png_error(png_ptr, "unexpected bit depth"); - break; - case 8: /* 8-bit sRGB gray values with an alpha channel; the alpha channel is * to be removed by composing on a background: either the row if @@ -3618,6 +3629,11 @@ png_image_read_background(png_voidp argument) } } break; + +#ifdef __GNUC__ + default: + png_error(png_ptr, "unexpected bit depth"); +#endif } return 1; |