tiny.png.DecodePlan

1pub const Plan = struct {2    input_bytes: usize,3    input_hash: u64,4    width: u32,5    height: u32,6    bit_depth: u8,7    color_type: u8,8    image_pixels: usize,9    source_row_bytes: usize,10    filter_bytes_per_pixel: usize,11    raw_bytes: usize,12    idat_bytes: usize,13    rgba8_bytes: usize,14    palette_offset: usize,15    palette_bytes: usize,16    transparency_offset: usize,17    transparency_bytes: usize,18    bounds: Bounds,1920    pub fn inspect(bytes: []const u8, bounds: Bounds) Error!Plan {21        if (bytes.len > bounds.input_bytes) return error.InputByteCapacityExceeded;22        if (bytes.len < encode.signature.len) return error.InvalidSignature;23        if (!std.mem.eql(u8, bytes[0..encode.signature.len], &encode.signature)) {24            return error.InvalidSignature;25        }2627        var scan = Scan{};28        var offset: usize = encode.signature.len;29        while (bytes.len - offset >= 8) {30            const chunk = try readChunk(bytes, offset);31            const finished = try scan.observe(chunk, bounds);32            offset = chunk.next_offset;33            if (finished) break;34        }35        return scan.finish(bytes, bounds);36    }3738    pub fn exactBounds(self: Plan) Bounds {39        return .{40            .input_bytes = self.input_bytes,41            .image_pixels = self.image_pixels,42            .source_row_bytes = self.source_row_bytes,43            .idat_bytes = self.idat_bytes,44        };45    }4647    pub fn header(self: Plan) model.Header {48        return .{49            .width = self.width,50            .height = self.height,51            .bit_depth = self.bit_depth,52            .color_type = self.color_type,53        };54    }5556    pub fn palette(self: Plan, bytes: []const u8) []const u8 {57        return bytes[self.palette_offset..][0..self.palette_bytes];58    }5960    pub fn transparency(self: Plan, bytes: []const u8) []const u8 {61        return bytes[self.transparency_offset..][0..self.transparency_bytes];62    }63};

1pub const DecodePlan = decode.Plan;