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This commit is contained in:
Ryan Oldenburg 2021-05-24 00:31:38 -05:00
parent 00dd3faa95
commit bf674b93e3
1 changed files with 7 additions and 4 deletions
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11
src/pixie/context.nim
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@ -67,18 +67,21 @@ proc state(ctx: Context): ContextState =
result.mask = if ctx.mask != nil: ctx.mask.copy() else: nil result.mask = if ctx.mask != nil: ctx.mask.copy() else: nil
proc save*(ctx: Context) {.inline.} = proc save*(ctx: Context) {.inline.} =
## Saves the entire state of the canvas by pushing the current state onto ## Saves the entire state of the context by pushing the current state onto
## a stack. ## a stack.
ctx.stateStack.add(ctx.state()) ctx.stateStack.add(ctx.state())
proc saveLayer*(ctx: Context) = proc saveLayer*(ctx: Context) =
## Saves the entire state of the context by pushing the current state onto
## a stack and allocates a new image layer for subsequent drawing. Calling
## restore blends the current layer image onto the prior layer or root image.
var state = ctx.state() var state = ctx.state()
state.layer = ctx.layer state.layer = ctx.layer
ctx.stateStack.add(state) ctx.stateStack.add(state)
ctx.layer = newImage(ctx.image.width, ctx.image.height) ctx.layer = newImage(ctx.image.width, ctx.image.height)
proc restore*(ctx: Context) = proc restore*(ctx: Context) =
## Restores the most recently saved canvas state by popping the top entry ## Restores the most recently saved context state by popping the top entry
## in the drawing state stack. If there is no saved state, this method does ## in the drawing state stack. If there is no saved state, this method does
## nothing. ## nothing.
if ctx.stateStack.len == 0: if ctx.stateStack.len == 0:
@ -418,12 +421,12 @@ proc translate*(ctx: Context, x, y: float32) {.inline.} =
ctx.mat = ctx.mat * translate(vec2(x, y)) ctx.mat = ctx.mat * translate(vec2(x, y))
proc scale*(ctx: Context, v: Vec2) {.inline.} = proc scale*(ctx: Context, v: Vec2) {.inline.} =
## Adds a scaling transformation to the canvas units horizontally and/or ## Adds a scaling transformation to the context units horizontally and/or
## vertically. ## vertically.
ctx.mat = ctx.mat * scale(v) ctx.mat = ctx.mat * scale(v)
proc scale*(ctx: Context, x, y: float32) {.inline.} = proc scale*(ctx: Context, x, y: float32) {.inline.} =
## Adds a scaling transformation to the canvas units horizontally and/or ## Adds a scaling transformation to the context units horizontally and/or
## vertically. ## vertically.
ctx.mat = ctx.mat * scale(vec2(x, y)) ctx.mat = ctx.mat * scale(vec2(x, y))