Add Chapter 8 code.

dom96 · Jun 19, 2016 · 4a11e9a · 4a11e9a
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diff --git a/Chapter8/canvas/canvas.nim b/Chapter8/canvas/canvas.nim
@@ -0,0 +1,19 @@
+import dom
+
+type
+ CanvasRenderingContext* = ref object
+ fillStyle* {.importc.}: cstring
+ strokeStyle* {.importc.}: cstring
+
+{.push importcpp.}
+
+proc getContext*(canvasElement: Element,
+ contextType: cstring): CanvasRenderingContext
+
+proc fillRect*(context: CanvasRenderingContext, x, y, width, height: int)
+
+proc moveTo*(context: CanvasRenderingContext, x, y: int)
+
+proc lineTo*(context: CanvasRenderingContext, x, y: int)
+
+proc stroke*(context: CanvasRenderingContext)
diff --git a/Chapter8/canvas/canvas_test.nim b/Chapter8/canvas/canvas_test.nim
@@ -0,0 +1,19 @@
+import canvas, dom
+
+proc onLoad() {.exportc.} =
+ var canvas = document.getElementById("canvas").EmbedElement
+ canvas.width = window.innerWidth
+ canvas.height = window.innerHeight
+ var ctx = canvas.getContext("2d")
+
+ ctx.fillStyle = "#1d4099"
+ ctx.fillRect(0, 0, window.innerWidth, window.innerHeight)
+
+ ctx.strokeStyle = "#ffffff"
+ let letterWidth = 100
+ let letterLeftPos = (window.innerWidth div 2) - (letterWidth div 2)
+ ctx.moveTo(letterLeftPos, 320)
+ ctx.lineTo(letterLeftPos, 110)
+ ctx.lineTo(letterLeftPos + letterWidth, 320)
+ ctx.lineTo(letterLeftPos + letterWidth, 110)
+ ctx.stroke()
diff --git a/Chapter8/canvas/index.html b/Chapter8/canvas/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <meta charset="utf-8"/>
+ <title>Nim in Action - Chapter 8</title>
+ <script type="text/javascript" src="canvas_test.js"></script>
+ <style type="text/css">
+ canvas { border: 1px solid black; width: 100%; height: 100%; }
+ </style>
+ </head>
+ <body onload="onLoad();" style="margin: 0; overflow: hidden;">
+ <canvas id="canvas"></canvas>
+ </body>
+</html>
diff --git a/Chapter8/sdl/sdl.nim b/Chapter8/sdl/sdl.nim
@@ -0,0 +1,34 @@
+when defined(Windows):
+ const libName* = "SDL2.dll"
+elif defined(Linux):
+ const libName* = "libSDL2.so"
+elif defined(MacOsX):
+ const libName* = "libSDL2.dylib"
+
+type
+ SdlWindow = object
+ SdlWindowPtr* = ptr SdlWindow
+ SdlRenderer = object
+ SdlRendererPtr* = ptr SdlRenderer
+
+const INIT_VIDEO* = 0x00000020
+
+{.push dynlib: libName.}
+proc init*(flags: uint32): cint {.importc: "SDL_Init".}
+
+proc createWindowAndRenderer*(width, height: cint, window_flags: cuint,
+ window: var SdlWindowPtr, renderer: var SdlRendererPtr): cint
+ {.importc: "SDL_CreateWindowAndRenderer".}
+
+proc pollEvent*(event: pointer): cint {.importc: "SDL_PollEvent".}
+
+proc setDrawColor*(renderer: SdlRendererPtr, r, g, b, a: uint8): cint
+ {.importc: "SDL_SetRenderDrawColor", discardable.}
+
+proc present*(renderer: SdlRendererPtr) {.importc: "SDL_RenderPresent".}
+
+proc clear*(renderer: SdlRendererPtr) {.importc: "SDL_RenderClear".}
+
+proc drawLines*(renderer: SdlRendererPtr, points: ptr tuple[x, y: cint],
+ count: cint): cint {.importc: "SDL_RenderDrawLines", discardable.}
+{.pop.}
diff --git a/Chapter8/sdl/sdl_test.nim b/Chapter8/sdl/sdl_test.nim
@@ -0,0 +1,25 @@
+import os
+import sdl
+
+if sdl.init(INIT_VIDEO) == -1:
+ quit("Couldn't initialise SDL")
+
+var window: SdlWindowPtr
+var renderer: SdlRendererPtr
+if createWindowAndRenderer(640, 480, 0, window, renderer) == -1:
+ quit("Couldn't create a window or renderer")
+
+discard pollEvent(nil)
+renderer.setDrawColor 29, 64, 153, 255
+renderer.clear
+renderer.setDrawColor 255, 255, 255, 255
+var points = [
+ (260'i32, 320'i32),
+ (260'i32, 110'i32),
+ (360'i32, 320'i32),
+ (360'i32, 110'i32)
+]
+renderer.drawLines(addr points[0], points.len.cint)
+
+renderer.present
+sleep(5000)
diff --git a/Chapter8/sfml/sfml.nim b/Chapter8/sfml/sfml.nim
@@ -0,0 +1,26 @@
+{.passL: "-lsfml-graphics -lsfml-system -lsfml-window".}
+
+type
+ VideoMode* {.importcpp: "sf::VideoMode".} = object
+ RenderWindowObj {.importcpp: "sf::RenderWindow".} = object
+ RenderWindow* = ptr RenderWindowObj
+ Color* {.importcpp: "sf::Color".} = object
+ Event* {.importcpp: "sf::Event".} = object
+
+{.push cdecl, header: "<SFML/Graphics.hpp>".}
+
+proc videoMode*(modeWidth, modeHeight: cuint, modeBitsPerPixel: cuint = 32): VideoMode
+ {.importcpp: "sf::VideoMode(@)", constructor.}
+
+proc newRenderWindow*(mode: VideoMode, title: cstring): RenderWindow
+ {.importcpp: "new sf::RenderWindow(@)", constructor.}
+
+proc pollEvent*(window: RenderWindow, event: var Event): bool
+ {.importcpp: "#.pollEvent(@)".}
+
+proc newColor*(red, green, blue, alpha: uint8): Color
+ {.importcpp: "sf::Color(@)", constructor.}
+
+proc clear*(window: RenderWindow, color: Color) {.importcpp: "#.clear(@)".}
+
+proc display*(window: RenderWindow) {.importcpp: "#.display()".}
diff --git a/Chapter8/sfml/sfml_test.nim b/Chapter8/sfml/sfml_test.nim
@@ -0,0 +1,9 @@
+import sfml, os
+var window = newRenderWindow(videoMode(800, 600), "SFML works!")
+
+var event: Event
+discard window.pollEvent(event)
+window.clear(newColor(29, 64, 153, 255))
+window.display()
+
+sleep(1000)