/* pngread.c - read a PNG file
*
- * Last changed in libpng 1.6.11 [June 5, 2014]
- * Copyright (c) 1998-2014 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.17 [March 26, 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.)
*
{
png_structp png_ptr = png_create_png_struct(user_png_ver, error_ptr,
error_fn, warn_fn, mem_ptr, malloc_fn, free_fn);
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* USER_MEM */
if (png_ptr != NULL)
{
/* 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
*/
if (chunk_name == png_IDAT)
{
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ if ((png_ptr->mode & PNG_HAVE_IHDR) == 0)
png_chunk_error(png_ptr, "Missing IHDR before IDAT");
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
+ (png_ptr->mode & PNG_HAVE_PLTE) == 0)
png_chunk_error(png_ptr, "Missing PLTE before IDAT");
- else if (png_ptr->mode & PNG_AFTER_IDAT)
+ else if ((png_ptr->mode & PNG_AFTER_IDAT) != 0)
png_chunk_benign_error(png_ptr, "Too many IDATs found");
png_ptr->mode |= PNG_HAVE_IDAT;
}
- else if (png_ptr->mode & PNG_HAVE_IDAT)
+ else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0)
png_ptr->mode |= PNG_AFTER_IDAT;
/* This should be a binary subdivision search or a hash for
PNG_HANDLE_CHUNK_AS_DEFAULT);
}
}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
/* Optional call to update the users info_ptr structure */
void PNGAPI
"png_start_read_image/png_read_update_info: duplicate call");
}
}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
#ifdef PNG_MNG_FEATURES_SUPPORTED
png_debug(1, "in png_do_read_intrapixel");
if (
- (row_info->color_type & PNG_COLOR_MASK_COLOR))
+ (row_info->color_type & PNG_COLOR_MASK_COLOR) != 0)
{
int bytes_per_pixel;
png_uint_32 row_width = row_info->width;
}
}
}
-#endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* MNG_FEATURES */
void PNGAPI
png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
/* png_read_start_row sets the information (in particular iwidth) for this
* interlace pass.
*/
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0)
png_read_start_row(png_ptr);
/* 1.5.6: row_info moved out of png_struct to a local here. */
row_info.pixel_depth = png_ptr->pixel_depth;
row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width);
+#ifdef PNG_WARNINGS_SUPPORTED
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
/* 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)
+ if ((png_ptr->transformations & PNG_INVERT_MONO) != 0)
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)
+ if ((png_ptr->transformations & PNG_FILLER) != 0)
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)
+ if ((png_ptr->transformations & PNG_PACKSWAP) != 0)
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)
+ if ((png_ptr->transformations & PNG_PACK) != 0)
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)
+ if ((png_ptr->transformations & PNG_SHIFT) != 0)
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)
+ if ((png_ptr->transformations & PNG_BGR) != 0)
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)
+ if ((png_ptr->transformations & PNG_SWAP_BYTES) != 0)
png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined");
#endif
}
+#endif /* WARNINGS */
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* If interlaced and we do not need a new row, combine row and return.
* untransformed) and, because of the libpng API for interlaced images, this
* means we must transform before de-interlacing.
*/
- if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
+ if (png_ptr->interlaced != 0 &&
+ (png_ptr->transformations & PNG_INTERLACE) != 0)
{
switch (png_ptr->pass)
{
default:
case 6:
- if (!(png_ptr->row_number & 1))
+ if ((png_ptr->row_number & 1) == 0)
{
png_read_finish_row(png_ptr);
return;
}
#endif
- if (!(png_ptr->mode & PNG_HAVE_IDAT))
+ if ((png_ptr->mode & PNG_HAVE_IDAT) == 0)
png_error(png_ptr, "Invalid attempt to read row data");
/* Fill the row with IDAT data: */
memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1);
#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) != 0 &&
(png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Expand interlaced rows to full size */
- if (png_ptr->interlaced &&
- (png_ptr->transformations & PNG_INTERLACE))
+ if (png_ptr->interlaced != 0 &&
+ (png_ptr->transformations & PNG_INTERLACE) != 0)
{
if (png_ptr->pass < 6)
png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
(*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read one or more rows of image data. If the image is interlaced,
dp++;
}
}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read the entire image. If the image has an alpha channel or a tRNS
return;
#ifdef PNG_READ_INTERLACING_SUPPORTED
- if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0)
{
pass = png_set_interlace_handling(png_ptr);
/* And make sure transforms are initialized. */
}
else
{
- if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE))
+ if (png_ptr->interlaced != 0 &&
+ (png_ptr->transformations & PNG_INTERLACE) == 0)
{
/* Caller called png_start_read_image or png_read_update_info without
* first turning on the PNG_INTERLACE transform. We can fix this here,
}
}
}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read the end of the PNG file. Will not read past the end of the
* still be pending IDAT data and an owned zstream. Deal with this here.
*/
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (!png_chunk_unknown_handling(png_ptr, png_IDAT))
+ if (png_chunk_unknown_handling(png_ptr, png_IDAT) == 0)
#endif
png_read_finish_IDAT(png_ptr);
{
if (chunk_name == png_IDAT)
{
- if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
+ if ((length > 0) ||
+ (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
png_benign_error(png_ptr, "Too many IDATs found");
}
png_handle_unknown(png_ptr, info_ptr, length, keep);
/* 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))
+ 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);
else
png_handle_unknown(png_ptr, info_ptr, length,
PNG_HANDLE_CHUNK_AS_DEFAULT);
- } while (!(png_ptr->mode & PNG_HAVE_IEND));
+ } while ((png_ptr->mode & PNG_HAVE_IEND) == 0);
}
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
/* Free all memory used in the read struct */
static void
#endif
png_free(png_ptr, png_ptr->big_row_buf);
+ png_ptr->big_row_buf = NULL;
png_free(png_ptr, png_ptr->big_prev_row);
+ png_ptr->big_prev_row = NULL;
png_free(png_ptr, png_ptr->read_buffer);
+ png_ptr->read_buffer = NULL;
#ifdef PNG_READ_QUANTIZE_SUPPORTED
png_free(png_ptr, png_ptr->palette_lookup);
+ png_ptr->palette_lookup = NULL;
png_free(png_ptr, png_ptr->quantize_index);
+ png_ptr->quantize_index = NULL;
#endif
- if (png_ptr->free_me & PNG_FREE_PLTE)
+ if ((png_ptr->free_me & PNG_FREE_PLTE) != 0)
+ {
png_zfree(png_ptr, png_ptr->palette);
+ png_ptr->palette = NULL;
+ }
png_ptr->free_me &= ~PNG_FREE_PLTE;
#if defined(PNG_tRNS_SUPPORTED) || \
defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- if (png_ptr->free_me & PNG_FREE_TRNS)
+ if ((png_ptr->free_me & PNG_FREE_TRNS) != 0)
+ {
png_free(png_ptr, png_ptr->trans_alpha);
+ png_ptr->trans_alpha = NULL;
+ }
png_ptr->free_me &= ~PNG_FREE_TRNS;
#endif
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
png_free(png_ptr, png_ptr->save_buffer);
+ png_ptr->save_buffer = NULL;
#endif
#if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) && \
defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
png_free(png_ptr, png_ptr->unknown_chunk.data);
+ png_ptr->unknown_chunk.data = NULL;
#endif
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->chunk_list = NULL;
#endif
/* NOTE: the 'setjmp' buffer may still be allocated and the memory and error
/* Tell libpng to strip 16-bit/color files down to 8 bits per color.
*/
- if (transforms & PNG_TRANSFORM_SCALE_16)
- /* 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.
- */
+ 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.
+ */
#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
png_set_scale_16(png_ptr);
#else
* latter by doing SCALE first. This is ok and allows apps not to check for
* which is supported to get the right answer.
*/
- if (transforms & PNG_TRANSFORM_STRIP_16)
+ if ((transforms & PNG_TRANSFORM_STRIP_16) != 0)
#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
png_set_strip_16(png_ptr);
#else
/* Strip alpha bytes from the input data without combining with
* the background (not recommended).
*/
- if (transforms & PNG_TRANSFORM_STRIP_ALPHA)
+ if ((transforms & PNG_TRANSFORM_STRIP_ALPHA) != 0)
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
png_set_strip_alpha(png_ptr);
#else
/* Extract multiple pixels with bit depths of 1, 2, or 4 from a single
* byte into separate bytes (useful for paletted and grayscale images).
*/
- if (transforms & PNG_TRANSFORM_PACKING)
+ if ((transforms & PNG_TRANSFORM_PACKING) != 0)
#ifdef PNG_READ_PACK_SUPPORTED
png_set_packing(png_ptr);
#else
/* Change the order of packed pixels to least significant bit first
* (not useful if you are using png_set_packing).
*/
- if (transforms & PNG_TRANSFORM_PACKSWAP)
+ if ((transforms & PNG_TRANSFORM_PACKSWAP) != 0)
#ifdef PNG_READ_PACKSWAP_SUPPORTED
png_set_packswap(png_ptr);
#else
* Expand paletted or RGB images with transparency to full alpha
* channels so the data will be available as RGBA quartets.
*/
- if (transforms & PNG_TRANSFORM_EXPAND)
+ if ((transforms & PNG_TRANSFORM_EXPAND) != 0)
#ifdef PNG_READ_EXPAND_SUPPORTED
png_set_expand(png_ptr);
#else
/* Invert monochrome files to have 0 as white and 1 as black
*/
- if (transforms & PNG_TRANSFORM_INVERT_MONO)
+ if ((transforms & PNG_TRANSFORM_INVERT_MONO) != 0)
#ifdef PNG_READ_INVERT_SUPPORTED
png_set_invert_mono(png_ptr);
#else
* [0,65535] to the original [0,7] or [0,31], or whatever range the
* colors were originally in:
*/
- if (transforms & PNG_TRANSFORM_SHIFT)
+ if ((transforms & PNG_TRANSFORM_SHIFT) != 0)
#ifdef PNG_READ_SHIFT_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sBIT)
+ if ((info_ptr->valid & PNG_INFO_sBIT) != 0)
png_set_shift(png_ptr, &info_ptr->sig_bit);
#else
png_app_error(png_ptr, "PNG_TRANSFORM_SHIFT not supported");
#endif
/* Flip the RGB pixels to BGR (or RGBA to BGRA) */
- if (transforms & PNG_TRANSFORM_BGR)
+ if ((transforms & PNG_TRANSFORM_BGR) != 0)
#ifdef PNG_READ_BGR_SUPPORTED
png_set_bgr(png_ptr);
#else
#endif
/* 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) != 0)
#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
png_set_swap_alpha(png_ptr);
#else
#endif
/* Swap bytes of 16-bit files to least significant byte first */
- if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
+ if ((transforms & PNG_TRANSFORM_SWAP_ENDIAN) != 0)
#ifdef PNG_READ_SWAP_SUPPORTED
png_set_swap(png_ptr);
#else
/* Added at libpng-1.2.41 */
/* Invert the alpha channel from opacity to transparency */
- if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
+ if ((transforms & PNG_TRANSFORM_INVERT_ALPHA) != 0)
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
png_set_invert_alpha(png_ptr);
#else
/* Added at libpng-1.2.41 */
/* Expand grayscale image to RGB */
- if (transforms & PNG_TRANSFORM_GRAY_TO_RGB)
+ if ((transforms & PNG_TRANSFORM_GRAY_TO_RGB) != 0)
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
png_set_gray_to_rgb(png_ptr);
#else
#endif
/* Added at libpng-1.5.4 */
- if (transforms & PNG_TRANSFORM_EXPAND_16)
+ if ((transforms & PNG_TRANSFORM_EXPAND_16) != 0)
#ifdef PNG_READ_EXPAND_16_SUPPORTED
png_set_expand_16(png_ptr);
#else
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);
PNG_UNUSED(params)
}
-#endif /* PNG_INFO_IMAGE_SUPPORTED */
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* INFO_IMAGE */
+#endif /* SEQUENTIAL_READ */
#ifdef PNG_SIMPLIFIED_READ_SUPPORTED
/* SIMPLIFIED READ
{
png_uint_32 format = 0;
- if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0)
format |= PNG_FORMAT_FLAG_COLOR;
- if (png_ptr->color_type & PNG_COLOR_MASK_ALPHA)
+ if ((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0)
format |= PNG_FORMAT_FLAG_ALPHA;
/* Use png_ptr here, not info_ptr, because by examination png_handle_tRNS
if (png_ptr->bit_depth == 16)
format |= PNG_FORMAT_FLAG_LINEAR;
- if (png_ptr->color_type & PNG_COLOR_MASK_PALETTE)
+ if ((png_ptr->color_type & PNG_COLOR_MASK_PALETTE) != 0)
format |= PNG_FORMAT_FLAG_COLORMAP;
return format;
{
if (file != NULL)
{
- if (png_image_read_init(image))
+ if (png_image_read_init(image) != 0)
{
/* This is slightly evil, but png_init_io doesn't do anything other
* than this and we haven't changed the standard IO functions so
if (fp != NULL)
{
- if (png_image_read_init(image))
+ if (png_image_read_init(image) != 0)
{
image->opaque->png_ptr->io_ptr = fp;
image->opaque->owned_file = 1;
return 0;
}
-#endif /* PNG_STDIO_SUPPORTED */
+#endif /* STDIO */
static void PNGCBAPI
png_image_memory_read(png_structp png_ptr, png_bytep out, png_size_t need)
{
if (memory != NULL && size > 0)
{
- if (png_image_read_init(image))
+ if (png_image_read_init(image) != 0)
{
/* Now set the IO functions to read from the memory buffer and
* store it into io_ptr. Again do this in-place to avoid calling a
/* But do not ignore image data handling chunks */
png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_AS_DEFAULT,
- chunks_to_process, (sizeof chunks_to_process)/5);
+ chunks_to_process, (int)/*SAFE*/(sizeof chunks_to_process)/5);
}
}
# define PNG_SKIP_CHUNKS(p) png_image_skip_unused_chunks(p)
#else
# define PNG_SKIP_CHUNKS(p) ((void)0)
-#endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */
+#endif /* HANDLE_AS_UNKNOWN */
/* The following macro gives the exact rounded answer for all values in the
* range 0..255 (it actually divides by 51.2, but the rounding still generates
set_file_encoding(png_image_read_control *display)
{
png_fixed_point g = display->image->opaque->png_ptr->colorspace.gamma;
- if (png_gamma_significant(g))
+ if (png_gamma_significant(g) != 0)
{
- if (png_gamma_not_sRGB(g))
+ if (png_gamma_not_sRGB(g) != 0)
{
display->file_encoding = P_FILE;
display->gamma_to_linear = png_reciprocal(g);
value *= 257;
break;
+#ifdef __GNUC__
default:
png_error(display->image->opaque->png_ptr,
"unexpected encoding (internal error)");
- break;
+#endif
}
return value;
png_uint_32 alpha, int encoding)
{
png_imagep image = display->image;
- const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) ?
+ const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) != 0 ?
P_LINEAR : P_sRGB;
const int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 &&
(red != green || green != blue);
green = png_gamma_16bit_correct(green*257, g);
blue = png_gamma_16bit_correct(blue*257, g);
- if (convert_to_Y || output_encoding == P_LINEAR)
+ if (convert_to_Y != 0 || output_encoding == P_LINEAR)
{
alpha *= 257;
encoding = P_LINEAR;
encoding = P_LINEAR;
}
- else if (encoding == P_sRGB && (convert_to_Y || output_encoding == P_LINEAR))
+ else if (encoding == P_sRGB &&
+ (convert_to_Y != 0 || output_encoding == P_LINEAR))
{
/* The values are 8-bit sRGB values, but must be converted to 16-bit
* linear.
y = (y + 128) >> 8;
y *= 255;
y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7);
+ alpha = PNG_DIV257(alpha);
encoding = P_sRGB;
}
# define afirst 0
# endif
# ifdef PNG_FORMAT_BGR_SUPPORTED
- const int bgr = (image->format & PNG_FORMAT_FLAG_BGR) ? 2 : 0;
+ const int bgr = (image->format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
# else
# define bgr 0
# endif
const png_structrp png_ptr = image->opaque->png_ptr;
const png_uint_32 output_format = image->format;
- const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) ?
+ const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) != 0 ?
P_LINEAR : P_sRGB;
unsigned int cmap_entries;
else
{
back_g = display->background->green;
- if (output_format & PNG_FORMAT_FLAG_COLOR)
+ if ((output_format & PNG_FORMAT_FLAG_COLOR) != 0)
{
back_r = display->background->red;
back_b = display->background->blue;
{
unsigned int back_alpha;
- if (output_format & PNG_FORMAT_FLAG_ALPHA)
+ if ((output_format & PNG_FORMAT_FLAG_ALPHA) != 0)
back_alpha = 0;
else
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
*/
data_encoding = P_sRGB;
- if (output_format & PNG_FORMAT_FLAG_ALPHA)
+ if ((output_format & PNG_FORMAT_FLAG_ALPHA) != 0)
{
if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries)
png_error(png_ptr, "gray+alpha color-map: too few entries");
*/
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
*/
if ((png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
png_ptr->num_trans > 0) &&
- png_gamma_not_sRGB(png_ptr->colorspace.gamma))
+ png_gamma_not_sRGB(png_ptr->colorspace.gamma) != 0)
{
cmap_entries = make_gray_file_colormap(display);
data_encoding = P_FILE;
/* Is there alpha in the output too? If so all four channels are
* processed into a special RGB cube with alpha support.
*/
- if (output_format & PNG_FORMAT_FLAG_ALPHA)
+ if ((output_format & PNG_FORMAT_FLAG_ALPHA) != 0)
{
png_uint_32 r;
for (i=0; i < cmap_entries; ++i)
{
- if (do_background && i < num_trans && trans[i] < 255)
+ if (do_background != 0 && i < num_trans && trans[i] < 255)
{
if (trans[i] == 0)
png_create_colormap_entry(display, i, back_r, back_g,
default:
png_error(png_ptr, "invalid PNG color type");
/*NOT REACHED*/
- break;
}
/* Now deal with the output processing */
- if (expand_tRNS && png_ptr->num_trans > 0 &&
- (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) == 0)
+ if (expand_tRNS != 0 && png_ptr->num_trans > 0 &&
+ (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) == 0)
png_set_tRNS_to_alpha(png_ptr);
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);
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)
png_uint_32 height = image->height;
png_uint_32 width = image->width;
ptrdiff_t step_row = display->row_bytes;
- unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) ? 3 : 1;
+ unsigned int channels =
+ (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1;
int pass;
for (pass = 0; pass < passes; ++pass)
*/
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
int swap_alpha = 0;
# ifdef PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
- if (preserve_alpha && (image->format & PNG_FORMAT_FLAG_AFIRST))
+ if (preserve_alpha != 0 &&
+ (image->format & PNG_FORMAT_FLAG_AFIRST) != 0)
swap_alpha = 1;
# endif
}
}
break;
+
+#ifdef __GNUC__
+ default:
+ png_error(png_ptr, "unexpected bit depth");
+#endif
}
return 1;
int mode; /* alpha mode */
/* Do this first so that we have a record if rgb to gray is happening. */
- if (change & PNG_FORMAT_FLAG_COLOR)
+ if ((change & PNG_FORMAT_FLAG_COLOR) != 0)
{
/* gray<->color transformation required. */
- if (format & PNG_FORMAT_FLAG_COLOR)
+ if ((format & PNG_FORMAT_FLAG_COLOR) != 0)
png_set_gray_to_rgb(png_ptr);
else
* enormous change) 'do_local_background' is used to indicate that
* the problem exists.
*/
- if (base_format & PNG_FORMAT_FLAG_ALPHA)
+ if ((base_format & PNG_FORMAT_FLAG_ALPHA) != 0)
do_local_background = 1/*maybe*/;
png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE,
{
png_fixed_point input_gamma_default;
- if ((base_format & PNG_FORMAT_FLAG_LINEAR) &&
- (image->flags & PNG_IMAGE_FLAG_16BIT_sRGB) == 0)
+ if ((base_format & PNG_FORMAT_FLAG_LINEAR) != 0 &&
+ (image->flags & PNG_IMAGE_FLAG_16BIT_sRGB) == 0)
input_gamma_default = PNG_GAMMA_LINEAR;
else
input_gamma_default = PNG_DEFAULT_sRGB;
/* If there *is* an alpha channel in the input it must be multiplied
* out; use PNG_ALPHA_STANDARD, otherwise just use PNG_ALPHA_PNG.
*/
- if (base_format & PNG_FORMAT_FLAG_ALPHA)
+ if ((base_format & PNG_FORMAT_FLAG_ALPHA) != 0)
mode = PNG_ALPHA_STANDARD; /* associated alpha */
else
* final value.
*/
if (png_muldiv(>est, output_gamma, png_ptr->colorspace.gamma,
- PNG_FP_1) && !png_gamma_significant(gtest))
+ PNG_FP_1) != 0 && png_gamma_significant(gtest) == 0)
do_local_background = 0;
else if (mode == PNG_ALPHA_STANDARD)
}
/* If the bit-depth changes then handle that here. */
- if (change & PNG_FORMAT_FLAG_LINEAR)
+ if ((change & PNG_FORMAT_FLAG_LINEAR) != 0)
{
- if (linear /*16-bit output*/)
+ if (linear != 0 /*16-bit output*/)
png_set_expand_16(png_ptr);
else /* 8-bit output */
}
/* Now the background/alpha channel changes. */
- if (change & PNG_FORMAT_FLAG_ALPHA)
+ if ((change & PNG_FORMAT_FLAG_ALPHA) != 0)
{
/* Removing an alpha channel requires composition for the 8-bit
* formats; for the 16-bit it is already done, above, by the
* pre-multiplication and the channel just needs to be stripped.
*/
- if (base_format & PNG_FORMAT_FLAG_ALPHA)
+ if ((base_format & PNG_FORMAT_FLAG_ALPHA) != 0)
{
/* If RGB->gray is happening the alpha channel must be left and the
* operation completed locally.
filler = 255;
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
- if (format & PNG_FORMAT_FLAG_AFIRST)
+ if ((format & PNG_FORMAT_FLAG_AFIRST) != 0)
{
where = PNG_FILLER_BEFORE;
change &= ~PNG_FORMAT_FLAG_AFIRST;
png_set_alpha_mode_fixed(png_ptr, mode, output_gamma);
# ifdef PNG_FORMAT_BGR_SUPPORTED
- if (change & PNG_FORMAT_FLAG_BGR)
+ if ((change & PNG_FORMAT_FLAG_BGR) != 0)
{
/* Check only the output format; PNG is never BGR; don't do this if
* the output is gray, but fix up the 'format' value in that case.
*/
- if (format & PNG_FORMAT_FLAG_COLOR)
+ if ((format & PNG_FORMAT_FLAG_COLOR) != 0)
png_set_bgr(png_ptr);
else
# endif
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
- if (change & PNG_FORMAT_FLAG_AFIRST)
+ if ((change & PNG_FORMAT_FLAG_AFIRST) != 0)
{
/* Only relevant if there is an alpha channel - it's particularly
* important to handle this correctly because do_local_compose may
* be set above and then libpng will keep the alpha channel for this
* code to remove.
*/
- if (format & PNG_FORMAT_FLAG_ALPHA)
+ if ((format & PNG_FORMAT_FLAG_ALPHA) != 0)
{
/* Disable this if doing a local background,
* TODO: remove this when local background is no longer required.
{
PNG_CONST png_uint_16 le = 0x0001;
- if (*(png_const_bytep)&le)
+ if ((*(png_const_bytep) & le) != 0)
png_set_swap(png_ptr);
}
{
png_uint_32 info_format = 0;
- if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0)
info_format |= PNG_FORMAT_FLAG_COLOR;
- if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
+ if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0)
{
/* do_local_compose removes this channel below. */
if (do_local_compose == 0)
info_format |= PNG_FORMAT_FLAG_LINEAR;
# ifdef PNG_FORMAT_BGR_SUPPORTED
- if (png_ptr->transformations & PNG_BGR)
+ if ((png_ptr->transformations & PNG_BGR) != 0)
info_format |= PNG_FORMAT_FLAG_BGR;
# endif
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (do_local_background == 2)
{
- if (format & PNG_FORMAT_FLAG_AFIRST)
+ if ((format & PNG_FORMAT_FLAG_AFIRST) != 0)
info_format |= PNG_FORMAT_FLAG_AFIRST;
}
/* Choose the correct 'end' routine; for the color-map case all the
* setup has already been done.
*/
- if (image->format & PNG_FORMAT_FLAG_COLORMAP)
+ if ((image->format & PNG_FORMAT_FLAG_COLORMAP) != 0)
result =
png_safe_execute(image, png_image_read_colormap, &display) &&
png_safe_execute(image, png_image_read_colormapped, &display);
return 0;
}
-#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED */
+#endif /* SIMPLIFIED_READ */
+#endif /* READ */
projects / platform / upstream / libpng.git / blobdiff