117 lines
3.9 KiB
Nim
117 lines
3.9 KiB
Nim
import bumpy, chroma, flatty/binny, os, pixie/common, pixie/contexts,
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pixie/fileformats/bmp, pixie/fileformats/gif, pixie/fileformats/jpg,
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pixie/fileformats/png, pixie/fileformats/ppm, pixie/fileformats/qoi,
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pixie/fileformats/svg, pixie/fonts, pixie/images, pixie/masks, pixie/paints,
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pixie/paths, strutils, vmath
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export bumpy, chroma, common, contexts, fonts, images, masks, paints, paths, vmath
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type
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FileFormat* = enum
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PngFormat, BmpFormat, JpgFormat, GifFormat, QoiFormat, PpmFormat
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converter autoStraightAlpha*(c: ColorRGBX): ColorRGBA {.inline, raises: [].} =
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## Convert a premultiplied alpha RGBA to a straight alpha RGBA.
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c.rgba()
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converter autoPremultipliedAlpha*(c: ColorRGBA): ColorRGBX {.inline, raises: [].} =
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## Convert a straight alpha RGBA to a premultiplied alpha RGBA.
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c.rgbx()
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proc decodeImage*(data: string): Image {.raises: [PixieError].} =
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## Loads an image from memory.
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if data.len > 8 and data.readUint64(0) == cast[uint64](pngSignature):
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decodePng(data)
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elif data.len > 2 and data.readUint16(0) == cast[uint16](jpgStartOfImage):
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decodeJpg(data)
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elif data.len > 2 and data.readStr(0, 2) == bmpSignature:
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decodeBmp(data)
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elif data.len > 5 and
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(data.readStr(0, 5) == xmlSignature or data.readStr(0, 4) == svgSignature):
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decodeSvg(data)
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elif data.len > 6 and data.readStr(0, 6) in gifSignatures:
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decodeGif(data)
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elif data.len > (14+8) and data.readStr(0, 4) == qoiSignature:
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decodeQoi(data)
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elif data.len > 9 and data.readStr(0, 2) in ppmSignatures:
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decodePpm(data)
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else:
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raise newException(PixieError, "Unsupported image file format")
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proc decodeMask*(data: string): Mask {.raises: [PixieError].} =
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## Loads a mask from memory.
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if data.len > 8 and data.readUint64(0) == cast[uint64](pngSignature):
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newMask(decodePng(data))
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else:
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raise newException(PixieError, "Unsupported mask file format")
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proc readImage*(filePath: string): Image {.inline, raises: [PixieError].} =
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## Loads an image from a file.
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try:
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decodeImage(readFile(filePath))
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except IOError as e:
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raise newException(PixieError, e.msg, e)
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proc readMask*(filePath: string): Mask {.raises: [PixieError].} =
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## Loads a mask from a file.
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try:
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decodeMask(readFile(filePath))
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except IOError as e:
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raise newException(PixieError, e.msg, e)
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proc encodeImage*(image: Image, fileFormat: FileFormat): string {.raises: [PixieError].} =
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## Encodes an image into memory.
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case fileFormat:
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of PngFormat:
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image.encodePng()
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of JpgFormat:
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image.encodeJpg()
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of BmpFormat:
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image.encodeBmp()
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of QoiFormat:
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image.encodeQoi()
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of GifFormat:
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raise newException(PixieError, "Unsupported file format")
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of PpmFormat:
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image.encodePpm()
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proc encodeMask*(mask: Mask, fileFormat: FileFormat): string {.raises: [PixieError].} =
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## Encodes a mask into memory.
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case fileFormat:
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of PngFormat:
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mask.encodePng()
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else:
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raise newException(PixieError, "Unsupported file format")
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proc writeFile*(image: Image, filePath: string) {.raises: [PixieError].} =
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## Writes an image to a file.
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let fileFormat = case splitFile(filePath).ext.toLowerAscii():
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of ".png": PngFormat
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of ".bmp": BmpFormat
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of ".jpg", ".jpeg": JpgFormat
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of ".qoi": QoiFormat
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of ".ppm": PpmFormat
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else:
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raise newException(PixieError, "Unsupported file extension")
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try:
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writeFile(filePath, image.encodeImage(fileFormat))
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except IOError as e:
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raise newException(PixieError, e.msg, e)
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proc writeFile*(mask: Mask, filePath: string) {.raises: [PixieError].} =
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## Writes a mask to a file.
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let fileFormat = case splitFile(filePath).ext.toLowerAscii():
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of ".png": PngFormat
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of ".bmp": BmpFormat
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of ".jpg", ".jpeg": JpgFormat
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of ".qoi": QoiFormat
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of ".ppm": PpmFormat
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else:
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raise newException(PixieError, "Unsupported file extension")
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try:
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writeFile(filePath, mask.encodeMask(fileFormat))
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except IOError as e:
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raise newException(PixieError, e.msg, e)
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