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Add support for loading images through ImageMagick as a buffer

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This commit is contained in:
Maurus Cuelenaere
2015-02-15 16:14:46 +01:00
parent 1f7e80e581
commit ab7408c96f
3 changed files with 37 additions and 2 deletions
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15
src/common.cc
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@@ -43,6 +43,15 @@ namespace sharp {
);
}
static bool buffer_is_gif(char *buffer, size_t len) {
return (
len >= 6 && (
(buffer[0] == 'G' && buffer[1] == 'I' && buffer[2] == 'F' &&
buffer[3] == '8' && (buffer[4] == '7' || buffer[4] == '9') && buffer[5] == 'a')
)
);
}
/*
Determine image format of a buffer.
*/
@@ -57,6 +66,8 @@ namespace sharp {
imageType = ImageType::WEBP;
} else if (buffer_is_tiff(static_cast<char*>(buffer), length)) {
imageType = ImageType::TIFF;
} else if (buffer_is_gif(static_cast<char*>(buffer), length)) {
imageType = ImageType::MAGICK;
}
}
return imageType;
@@ -75,6 +86,10 @@ namespace sharp {
vips_webpload_buffer(buffer, length, &image, "access", access, NULL);
} else if (imageType == ImageType::TIFF) {
vips_tiffload_buffer(buffer, length, &image, "access", access, NULL);
#if (VIPS_MAJOR_VERSION >= 8 && VIPS_MINOR_VERSION >= 0)
} else if (imageType == ImageType::MAGICK) {
vips_magickload_buffer(buffer, length, &image, "access", access, NULL);
#endif
}
return image;
}