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svgctx

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This commit is contained in:
Ryan Oldenburg 2022-05-21 17:21:45 -05:00
parent 0f20549d45
commit db08965bd9
1 changed files with 17 additions and 17 deletions
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34
src/pixie/fileformats/svg.nim
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@ -15,7 +15,7 @@ type
x1, y1, x2, y2: float32 x1, y1, x2, y2: float32
stops: seq[ColorStop] stops: seq[ColorStop]
Ctx = object SvgCtx = object
display: bool display: bool
fillRule: WindingRule fillRule: WindingRule
fill: Paint fill: Paint
@ -38,7 +38,7 @@ proc attrOrDefault(node: XmlNode, name, default: string): string =
if result.len == 0: if result.len == 0:
result = default result = default
proc initCtx(): Ctx = proc initSvgCtx(): SvgCtx =
result.display = true result.display = true
try: try:
result.fill = parseHtmlColor("black").rgbx result.fill = parseHtmlColor("black").rgbx
@ -52,7 +52,7 @@ proc initCtx(): Ctx =
result.strokeOpacity = 1 result.strokeOpacity = 1
result.linearGradients = newTable[string, LinearGradient]() result.linearGradients = newTable[string, LinearGradient]()
proc decodeCtxInternal(inherited: Ctx, node: XmlNode): Ctx = proc decodeSvgCtxInternal(inherited: SvgCtx, node: XmlNode): SvgCtx =
result = inherited result = inherited
proc splitArgs(s: string): seq[string] = proc splitArgs(s: string): seq[string] =
@ -316,21 +316,21 @@ proc decodeCtxInternal(inherited: Ctx, node: XmlNode): Ctx =
else: else:
failInvalidTransform(transform) failInvalidTransform(transform)
proc decodeCtx(inherited: Ctx, node: XmlNode): Ctx = proc decodeSvgCtx(inherited: SvgCtx, node: XmlNode): SvgCtx =
try: try:
decodeCtxInternal(inherited, node) decodeSvgCtxInternal(inherited, node)
except PixieError as e: except PixieError as e:
raise e raise e
except: except:
raise currentExceptionAsPixieError() raise currentExceptionAsPixieError()
proc fill(img: Image, ctx: Ctx, path: Path) {.inline.} = proc fill(img: Image, ctx: SvgCtx, path: Path) {.inline.} =
if ctx.display and ctx.opacity > 0: if ctx.display and ctx.opacity > 0:
let paint = newPaint(ctx.fill) let paint = newPaint(ctx.fill)
paint.opacity = paint.opacity * ctx.opacity paint.opacity = paint.opacity * ctx.opacity
img.fillPath(path, paint, ctx.transform, ctx.fillRule) img.fillPath(path, paint, ctx.transform, ctx.fillRule)
proc stroke(img: Image, ctx: Ctx, path: Path) {.inline.} = proc stroke(img: Image, ctx: SvgCtx, path: Path) {.inline.} =
if ctx.display and ctx.opacity > 0: if ctx.display and ctx.opacity > 0:
let paint = newPaint(ctx.stroke) let paint = newPaint(ctx.stroke)
paint.color.a *= (ctx.opacity * ctx.strokeOpacity) paint.color.a *= (ctx.opacity * ctx.strokeOpacity)
@ -345,7 +345,7 @@ proc stroke(img: Image, ctx: Ctx, path: Path) {.inline.} =
dashes = ctx.strokeDashArray dashes = ctx.strokeDashArray
) )
proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) = proc draw(img: Image, node: XmlNode, ctxStack: var seq[SvgCtx]) =
if node.kind != xnElement: if node.kind != xnElement:
# Skip <!-- comments --> # Skip <!-- comments -->
return return
@ -359,7 +359,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
echo node echo node
of "g": of "g":
let ctx = decodeCtx(ctxStack[^1], node) let ctx = decodeSvgCtx(ctxStack[^1], node)
ctxStack.add(ctx) ctxStack.add(ctx)
for child in node: for child in node:
img.draw(child, ctxStack) img.draw(child, ctxStack)
@ -368,7 +368,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
of "path": of "path":
let let
d = node.attr("d") d = node.attr("d")
ctx = decodeCtx(ctxStack[^1], node) ctx = decodeSvgCtx(ctxStack[^1], node)
path = parsePath(d) path = parsePath(d)
img.fill(ctx, path) img.fill(ctx, path)
@ -377,7 +377,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
of "line": of "line":
let let
ctx = decodeCtx(ctxStack[^1], node) ctx = decodeSvgCtx(ctxStack[^1], node)
x1 = parseFloat(node.attrOrDefault("x1", "0")) x1 = parseFloat(node.attrOrDefault("x1", "0"))
y1 = parseFloat(node.attrOrDefault("y1", "0")) y1 = parseFloat(node.attrOrDefault("y1", "0"))
x2 = parseFloat(node.attrOrDefault("x2", "0")) x2 = parseFloat(node.attrOrDefault("x2", "0"))
@ -392,7 +392,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
of "polyline", "polygon": of "polyline", "polygon":
let let
ctx = decodeCtx(ctxStack[^1], node) ctx = decodeSvgCtx(ctxStack[^1], node)
points = node.attr("points") points = node.attr("points")
var vecs: seq[Vec2] var vecs: seq[Vec2]
@ -428,7 +428,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
of "rect": of "rect":
let let
ctx = decodeCtx(ctxStack[^1], node) ctx = decodeSvgCtx(ctxStack[^1], node)
x = parseFloat(node.attrOrDefault("x", "0")) x = parseFloat(node.attrOrDefault("x", "0"))
y = parseFloat(node.attrOrDefault("y", "0")) y = parseFloat(node.attrOrDefault("y", "0"))
width = parseFloat(node.attrOrDefault("width", "0")) width = parseFloat(node.attrOrDefault("width", "0"))
@ -468,7 +468,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
of "circle", "ellipse": of "circle", "ellipse":
let let
ctx = decodeCtx(ctxStack[^1], node) ctx = decodeSvgCtx(ctxStack[^1], node)
cx = parseFloat(node.attrOrDefault("cx", "0")) cx = parseFloat(node.attrOrDefault("cx", "0"))
cy = parseFloat(node.attrOrDefault("cy", "0")) cy = parseFloat(node.attrOrDefault("cy", "0"))
@ -492,7 +492,7 @@ proc draw(img: Image, node: XmlNode, ctxStack: var seq[Ctx]) =
of "linearGradient": of "linearGradient":
let let
ctx = decodeCtx(ctxStack[^1], node) ctx = decodeSvgCtx(ctxStack[^1], node)
id = node.attr("id") id = node.attr("id")
gradientUnits = node.attr("gradientUnits") gradientUnits = node.attr("gradientUnits")
gradientTransform = node.attr("gradientTransform") gradientTransform = node.attr("gradientTransform")
@ -569,8 +569,8 @@ proc decodeSvg*(
viewBoxWidth = parseInt(box[2]) viewBoxWidth = parseInt(box[2])
viewBoxHeight = parseInt(box[3]) viewBoxHeight = parseInt(box[3])
var rootCtx = initCtx() var rootCtx = initSvgCtx()
rootCtx = decodeCtx(rootCtx, root) rootCtx = decodeSvgCtx(rootCtx, root)
if viewBoxMinX != 0 or viewBoxMinY != 0: if viewBoxMinX != 0 or viewBoxMinY != 0:
let viewBoxMin = vec2(-viewBoxMinX.float32, -viewBoxMinY.float32) let viewBoxMin = vec2(-viewBoxMinX.float32, -viewBoxMinY.float32)