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[libpng15] Corrections to the PNG_FORMAT_ values and code cleanup.

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This commit is contained in:
John Bowler
2011-11-08 14:29:45 -06:00
committed by Glenn Randers-Pehrson
parent 3615d03e05
commit dd81915d5b
2 changed files with 46 additions and 56 deletions
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86
pngwrite.c
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@@ -1973,18 +1973,26 @@ png_image_write_main(png_voidp argument)
{
/* The gamma here is 1.0 (linear) and the cHRM chunk matches sRGB. */
png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_LINEAR);
png_set_cHRM_fixed(png_ptr, info_ptr,
/* color x y */
/* white */ 31270, 32900,
/* red */ 64000, 33000,
/* green */ 30000, 60000,
/* blue */ 15000, 6000
);
if (!(image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB))
png_set_cHRM_fixed(png_ptr, info_ptr,
/* color x y */
/* white */ 31270, 32900,
/* red */ 64000, 33000,
/* green */ 30000, 60000,
/* blue */ 15000, 6000
);
}
else
else if (!(image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB))
png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_PERCEPTUAL);
/* Else writing an 8-bit file and the *colors* aren't sRGB, but the 8-bit
* space must still be gamma encoded.
*/
else
png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE);
/* Write the file header. */
png_write_info(png_ptr, info_ptr);
@@ -2081,7 +2089,7 @@ png_image_write_main(png_voidp argument)
}
int PNGAPI
png_image_write_to_stdio (png_imagep image, FILE *file, int convert_to_8bit,
png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit,
const void *buffer, png_int_32 row_stride)
{
/* Write the image to the given (FILE*). */
@@ -2125,7 +2133,7 @@ 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,
png_image_write_to_file(png_imagep image, const char *file_name,
int convert_to_8bit, const void *buffer, png_int_32 row_stride)
{
/* Write the image to the named file. */
@@ -2137,56 +2145,38 @@ png_image_write_to_file (png_imagep image, const char *file_name,
if (fp != NULL)
{
if (png_image_write_init(image))
if (png_image_write_to_stdio(image, fp, convert_to_8bit, buffer,
row_stride))
{
png_image_write_control display;
int error; /* from fflush/fclose */
image->opaque->png_ptr->io_ptr = fp;
image->opaque->owned_file = 1;
/* No need to close this file now - png_image_free will do that.
*/
memset(&display, 0, sizeof display);
display.image = image;
display.buffer = buffer;
display.row_stride = row_stride;
display.convert_to_8bit = convert_to_8bit;
if (png_safe_execute(image, png_image_write_main, &display))
/* Make sure the file is flushed correctly. */
if (fflush(fp) == 0 && ferror(fp) == 0)
{
int error; /* from fflush/fclose */
if (fclose(fp) == 0)
return 1;
/* Make sure the file is flushed correctly. */
if (fflush(fp) == 0)
{
/* Steal the file pointer back to make sure it closes ok.
*/
image->opaque->png_ptr->io_ptr = NULL;
image->opaque->owned_file = 0;
if (fclose(fp) == 0)
{
png_image_free(image);
return 1;
}
error = errno;
}
else
error = errno;
return png_image_error(image, strerror(error));
error = errno; /* from fclose */
}
else /* else cleanup has already happened */
return 0;
else
{
error = errno; /* from fflush or ferror */
(void)fclose(fp);
}
(void)remove(file_name);
/* The image has already been cleaned up; this is just used to
* set the error (because the original write succeeded).
*/
return png_image_error(image, strerror(error));
}
else
{
/* Clean up: just the opened file. */
(void)fclose(fp);
(void)remove(file_name);
return 0;
}
}