Use matrix in all draw paths.
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treeform
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4 changed files with 31 additions and 60 deletions
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@ -154,27 +154,31 @@ proc fraction(v: float32): float32 =
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result = abs(v)
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result = result - floor(result)
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proc drawFast1*(a: Image, b: Image, x, y: int): Image =
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proc drawFast1*(a: Image, b: Image, mat: Mat3): Image =
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## Draws one image onto another using integer x,y offset with COPY.
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result = newImage(a.width, a.height)
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for yd in 0 ..< a.width:
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for xd in 0 ..< a.height:
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var rgba = a.getRgbaUnsafe(xd, yd)
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if b.inside(xd - x, yd - y):
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rgba = b.getRgbaUnsafe(xd - x, yd - y)
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result.setRgbaUnsafe(xd, yd, rgba)
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var matInv = mat.inverse()
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for y in 0 ..< a.width:
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for x in 0 ..< a.height:
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var rgba = a.getRgbaUnsafe(x, y)
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let srcPos = matInv * vec2(x.float32, y.float32)
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if b.inside(srcPos.x.floor.int, srcPos.y.floor.int):
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rgba = b.getRgbaUnsafe(srcPos.x.floor.int, srcPos.y.floor.int)
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result.setRgbaUnsafe(x, y, rgba)
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proc drawFast2*(a: Image, b: Image, x, y: int, blendMode: BlendMode): Image =
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## Draws one image onto another using integer x,y offset with color blending.
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proc drawFast2*(a: Image, b: Image, mat: Mat3, blendMode: BlendMode): Image =
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## Draws one image onto another using matrix with color blending.
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result = newImage(a.width, a.height)
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for yd in 0 ..< a.width:
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for xd in 0 ..< a.height:
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var rgba = a.getRgbaUnsafe(xd, yd)
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if b.inside(xd - x, yd - y):
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var rgba2 = b.getRgbaUnsafe(xd - x, yd - y)
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var matInv = mat.inverse()
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for y in 0 ..< a.width:
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for x in 0 ..< a.height:
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var rgba = a.getRgbaUnsafe(x, y)
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let srcPos = matInv * vec2(x.float32, y.float32)
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if b.inside(srcPos.x.floor.int, srcPos.y.floor.int):
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let rgba2 = b.getRgbaUnsafe(srcPos.x.floor.int, srcPos.y.floor.int)
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if blendMode.hasEffect(rgba2):
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rgba = blendMode.mix(rgba, rgba2)
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result.setRgbaUnsafe(xd, yd, rgba)
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result.setRgbaUnsafe(x, y, rgba)
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proc drawFast3*(a: Image, b: Image, mat: Mat3, blendMode: BlendMode): Image =
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## Draws one image onto another using matrix with color blending.
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@ -190,52 +194,21 @@ proc drawFast3*(a: Image, b: Image, mat: Mat3, blendMode: BlendMode): Image =
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rgba = blendMode.mix(rgba, rgba2)
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result.setRgbaUnsafe(x, y, rgba)
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proc drawFast4*(a: Image, b: Image, mat: Mat3, blendMode: BlendMode): Image =
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## Draws one image onto another using matrix with color blending.
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result = newImage(a.width, a.height)
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var matInv = mat.inverse()
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for y in 0 ..< a.width:
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for x in 0 ..< a.height:
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var rgba = a.getRgbaUnsafe(x, y)
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let srcPos = matInv * vec2(x.float32, y.float32)
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if b.inside(srcPos.x.floor.int, srcPos.y.floor.int):
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let rgba2 = b.getRgbaUnsafe(srcPos.x.floor.int, srcPos.y.floor.int)
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if blendMode.hasEffect(rgba2):
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rgba = blendMode.mix(rgba, rgba2)
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result.setRgbaUnsafe(x, y, rgba)
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proc draw*(a: Image, b: Image, mat: Mat3, blendMode = bmNormal): Image =
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## Draws one image onto another using matrix with color blending.
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if mat[0, 0] == 1 and mat[0, 1] == 0 and
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mat[1, 0] == 0 and mat[1, 1] == 1 and
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mat[2, 0].fraction == 0.0 and mat[2, 1].fraction == 0.0:
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# Matrix is simple integer translation fast path:
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if blendMode == bmCopy:
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#echo "use 1"
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return drawFast1(
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a, b, mat[2, 0].int, mat[2, 1].int
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)
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else:
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#echo "use 2"
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return drawFast2(
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a, b, mat[2, 0].int, mat[2, 1].int, blendMode
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)
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let ns = [-1.float32, 0, 1]
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if mat[0, 0] in ns and mat[0, 1] in ns and
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mat[1, 0] in ns and mat[1, 1] in ns and
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mat[2, 0].fraction == 0.0 and mat[2, 1].fraction == 0.0:
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echo "use 4"
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return drawFast4(
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a, b, mat, blendMode
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)
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# Todo: if matrix is a simple flip -> fast path
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# 4 rotation x 3 flips = 12 combo
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#echo "use 3"
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if blendMode == bmCopy:
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return drawFast1(
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a, b, mat
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)
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else:
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return drawFast2(
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a, b, mat, blendMode
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)
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return drawFast3(a, b, mat, blendMode)
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proc draw*(a: Image, b: Image, pos = vec2(0, 0), blendMode = bmNormal): Image =
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a.draw(b, translate(pos), blendMode)
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BIN
tests/images/drawFast1Rot.master.png
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tests/images/drawFast1Rot.master.png
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After Width: | Height: | Size: 346 B |
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tests/images/drawFast1Rot.png
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tests/images/drawFast1Rot.png
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After Width: | Height: | Size: 346 B |
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@ -26,7 +26,7 @@ block:
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a.fill(rgba(255, 0, 0, 255))
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var b = newImage(100, 100)
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b.fill(rgba(0, 255, 0, 255))
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var c = a.drawFast1(b, x=25, y=25)
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var c = a.drawFast1(b, translate(vec2(25, 25)))
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c.writeAndCheck("tests/images/drawFast1.png")
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block:
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@ -34,7 +34,7 @@ block:
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a.fill(rgba(255, 0, 0, 255))
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var b = newImage(100, 100)
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b.fill(rgba(0, 255, 0, 255))
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var c = a.drawFast2(b, x=25, y=25, bmCopy)
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var c = a.drawFast2(b, translate(vec2(25, 25)), bmCopy)
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c.writeAndCheck("tests/images/drawFast2.png")
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block:
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@ -50,8 +50,6 @@ block:
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a.fill(rgba(255, 0, 0, 255))
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var b = newImage(100, 100)
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b.fill(rgba(0, 255, 0, 255))
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var c = a.drawFast4(b, translate(vec2(25.15, 25.15)) * rotationMat3(PI/2), bmCopy)
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c.writeAndCheck("tests/images/drawFast4Rot.png")
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var d = a.drawFast3(b, translate(vec2(25.15, 25.15)) * rotationMat3(PI/2), bmCopy)
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d.writeAndCheck("tests/images/drawFast3Rot.png")
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var c = a.drawFast1(b, translate(vec2(25, 25)) * rotationMat3(PI/2))
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c.writeAndCheck("tests/images/drawFast1Rot.png")
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