MyouProject/pixie
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little speedups

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This commit is contained in:
Ryan Oldenburg 2021-01-27 03:07:17 -06:00
parent e85ab1f3fe
commit 8668f355f1
1 changed files with 12 additions and 15 deletions
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27
src/pixie/images.nim
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@ -364,20 +364,17 @@ proc blurAlpha*(image: Image, radius: float32) =
proc applyOpacity*(image: Image, opacity: float32) =
## Multiplies alpha of the image by opacity.
let op = (255 * opacity).uint32
for i in 0 ..< image.data.len:
var rgba = image.data[i]
for rgba in image.data.mitems:
rgba.a = ((rgba.a.uint32 * op) div 255).clamp(0, 255).uint8
image.data[i] = rgba
proc sharpOpacity*(image: Image) =
## Sharpens the opacity to extreme.
## A = 0 stays 0. Anything else turns into 255.
for i in 0 ..< image.data.len:
var rgba = image.data[i]
for rgba in image.data.mitems:
if rgba.a == 0:
image.data[i] = rgba(0, 0, 0, 0)
rgba = rgba(0, 0, 0, 0)
else:
image.data[i] = rgba(255, 255, 255, 255)
rgba = rgba(255, 255, 255, 255)
proc drawCorrect*(a, b: Image, mat: Mat3, blendMode: BlendMode) =
## Draws one image onto another using matrix with color blending.
@ -509,7 +506,8 @@ proc resize*(srcImage: Image, width, height: int): Image =
scale(vec2(
(width + 1).float / srcImage.width.float,
(height + 1).float / srcImage.height.float
))
)),
bmOverwrite
)
proc shift*(image: Image, offset: Vec2) =
@ -517,7 +515,7 @@ proc shift*(image: Image, offset: Vec2) =
if offset != vec2(0, 0):
let copy = image.copy() # Copy to read from.
image.fill(rgba(0, 0, 0, 0)) # Reset this for being drawn to.
image.draw(copy, offset) # Draw copy into image.
image.draw(copy, offset, bmOverwrite) # Draw copy into image.
proc spread*(image: Image, spread: float32) =
## Grows the image as a mask by spread.
@ -536,19 +534,18 @@ proc spread*(image: Image, spread: float32) =
maxAlpha = alpha
if maxAlpha == 255:
break blurBox
image[x, y] = rgba(0, 0, 0, maxAlpha)
image.setRgbaUnsafe(x, y, rgba(0, 0, 0, maxAlpha))
proc shadow*(
mask: Image, offset: Vec2, spread, blur: float32, color: ColorRGBA
): Image =
## Create a shadow of the image with the offset, spread and blur.
var shadow = mask
if offset != vec2(0, 0):
shadow.shift(offset)
mask.shift(offset)
if spread > 0:
shadow.spread(spread)
mask.spread(spread)
if blur > 0:
shadow.blurAlpha(blur)
mask.blurAlpha(blur)
result = newImage(mask.width, mask.height)
result.fill(color)
result.draw(shadow, blendMode = bmMask)
result.draw(mask, blendMode = bmMask)