Mercurial > games > semicongine
annotate semiconginev2/image.nim @ 1261:6deb5ceaa3fb
merge
| author | sam <sam@basx.dev> |
|---|---|
| date | Sun, 28 Jul 2024 21:39:45 +0700 |
| parents | 01e9f41d35b1 |
| children |
| rev | line source |
|---|---|
| 1242 | 1 type |
| 2 Gray* = TVec1[uint8] | |
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1247
c15770761865
add: gltf loading test, gltf loading for materials
sam <sam@basx.dev>
parents:
1242
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changeset
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3 BGRA* = TVec4[uint8] |
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c15770761865
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parents:
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4 PixelType* = Gray | BGRA |
| 1242 | 5 Image*[T: PixelType] = object |
| 6 width*: uint32 | |
| 7 height*: uint32 | |
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8 minInterpolation*: VkFilter = VK_FILTER_LINEAR |
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c15770761865
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9 magInterpolation*: VkFilter = VK_FILTER_LINEAR |
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c15770761865
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parents:
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10 wrapU: VkSamplerAddressMode = VK_SAMPLER_ADDRESS_MODE_REPEAT |
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c15770761865
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sam <sam@basx.dev>
parents:
1242
diff
changeset
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11 wrapV: VkSamplerAddressMode = VK_SAMPLER_ADDRESS_MODE_REPEAT |
| 1242 | 12 data*: seq[T] |
| 13 vk*: VkImage | |
| 14 imageview*: VkImageView | |
| 15 sampler*: VkSampler | |
| 16 isRenderTarget*: bool = false | |
| 17 samples*: VkSampleCountFlagBits = VK_SAMPLE_COUNT_1_BIT | |
| 18 | |
| 1252 | 19 proc LoadImageData*[T: PixelType](pngData: string|seq[uint8]): Image[T] = |
| 1242 | 20 when T is Gray: |
| 21 let pngType = 0.cint | |
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22 elif T is BGRA: |
| 1242 | 23 let pngType = 6.cint |
| 24 | |
| 25 var w, h: cuint | |
| 26 var data: cstring | |
| 27 | |
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28 if lodepng_decode_memory(out_data = addr(data), w = addr(w), h = addr(h), in_data = cast[cstring](pngData.ToCPointer), insize = csize_t(pngData.len), colorType = pngType, bitdepth = 8) != 0: |
| 1242 | 29 raise newException(Exception, "An error occured while loading PNG file") |
| 30 | |
| 31 let imagesize = w * h * 4 | |
| 32 result = Image[T](width: w, height: h, data: newSeq[T](w * h)) | |
| 33 copyMem(result.data.ToCPointer, data, imagesize) | |
| 34 nativeFree(data) | |
| 35 | |
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parents:
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36 when T is BGRA: # converkt to BGRA |
| 1242 | 37 for i in 0 ..< result.data.len: |
| 38 swap(result.data[i][0], result.data[i][2]) | |
| 39 | |
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40 proc LoadImage*[T: PixelType](path: string, package = DEFAULT_PACKAGE): Image[T] = |
| 1252 | 41 assert path.splitFile().ext.toLowerAscii == ".png", "Unsupported image type: " & path.splitFile().ext.toLowerAscii |
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sam <sam@basx.dev>
parents:
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changeset
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42 when T is Gray: |
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c15770761865
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sam <sam@basx.dev>
parents:
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43 let pngType = 0.cint |
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c15770761865
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parents:
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44 elif T is BGRA: |
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sam <sam@basx.dev>
parents:
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changeset
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45 let pngType = 6.cint |
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sam <sam@basx.dev>
parents:
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46 |
| 1252 | 47 result = LoadImageData[T](loadResource_intern(path, package = package).readAll()) |
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sam <sam@basx.dev>
parents:
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changeset
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48 |
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49 |
| 1242 | 50 proc toPNG[T: PixelType](image: Image[T]): seq[uint8] = |
| 51 when T is Gray: | |
| 52 let pngType = 0 # hardcoded in lodepng.h | |
| 53 else: | |
| 54 let pngType = 6 # hardcoded in lodepng.h | |
| 55 var | |
| 56 pngData: cstring | |
| 57 pngSize: csize_t | |
| 58 for y in 0 ..< image.height: | |
| 59 for x in 0 ..< image.width: | |
| 60 discard | |
| 61 let ret = lodepng_encode_memory( | |
| 62 addr pngData, | |
| 63 addr pngSize, | |
| 64 cast[cstring](image.imagedata.ToCPointer), | |
| 65 cuint(image.width), | |
| 66 cuint(image.height), | |
| 67 cint(pngType), | |
| 68 8, | |
| 69 ) | |
| 70 assert ret == 0, &"There was an error with generating the PNG data for image {image}, result was: {ret}" | |
| 71 result = newSeq[uint8](pngSize) | |
| 72 for i in 0 ..< pngSize: | |
| 73 result[i] = uint8(pngData[i]) | |
| 74 nativeFree(pngData) | |
| 75 | |
| 76 proc WritePNG*(image: Image, filename: string) = | |
| 77 let f = filename.open(mode = fmWrite) | |
| 78 let data = image.toPNG() | |
| 79 let written = f.writeBytes(data, 0, data.len) | |
| 80 assert written == data.len, &"There was an error while saving '{filename}': only {written} of {data.len} bytes were written" | |
| 81 f.close() |