Java Code Examples for com.google.gwt.canvas.client.Canvas#createIfSupported()
The following examples show how to use
com.google.gwt.canvas.client.Canvas#createIfSupported() .
You can vote up the ones you like or vote down the ones you don't like,
and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: TexturedCube.java From TGAReader with MIT License | 6 votes |
Canvas createImageCanvas(int [] pixels, int width, int height) { Canvas canvas = Canvas.createIfSupported(); canvas.setCoordinateSpaceWidth(width); canvas.setCoordinateSpaceHeight(height); Context2d context = canvas.getContext2d(); ImageData data = context.createImageData(width, height); CanvasPixelArray array = data.getData(); for(int i=0; i<width*height; i++) { array.set(4*i+0, pixels[i] & 0xFF); array.set(4*i+1, (pixels[i] >> 8) & 0xFF); array.set(4*i+2, (pixels[i] >> 16) & 0xFF); array.set(4*i+3, (pixels[i] >> 24) & 0xFF); } context.putImageData(data, 0, 0); return canvas; }
Example 2
Source File: ImageCanvasTest.java From TGAReader with MIT License | 6 votes |
private Canvas createImageCanvas(int [] pixels, int width, int height) { Canvas canvas = Canvas.createIfSupported(); canvas.setCoordinateSpaceWidth(width); canvas.setCoordinateSpaceHeight(height); Context2d context = canvas.getContext2d(); ImageData data = context.createImageData(width, height); CanvasPixelArray array = data.getData(); for(int i=0; i<width*height; i++) { // ABGR array.set(4*i+0, pixels[i] & 0xFF); array.set(4*i+1, (pixels[i] >> 8) & 0xFF); array.set(4*i+2, (pixels[i] >> 16) & 0xFF); array.set(4*i+3, (pixels[i] >> 24) & 0xFF); } context.putImageData(data, 0, 0); canvas.getElement().getStyle().setMargin(4, Unit.PX); return canvas; }
Example 3
Source File: DataStore.java From djvu-html5 with GNU General Public License v2.0 | 5 votes |
public static CanvasElement createImage(int width, int height) { Canvas canvas = Canvas.createIfSupported(); canvas.setWidth(width + "px"); canvas.setCoordinateSpaceWidth(width); canvas.setHeight(height + "px"); canvas.setCoordinateSpaceHeight(height); return canvas.getCanvasElement(); }
Example 4
Source File: Djvu_html5.java From djvu-html5 with GNU General Public License v2.0 | 5 votes |
private Widget prepareCanvas() { canvas = Canvas.createIfSupported(); if (canvas == null) { // TODO throw new RuntimeException("Canvas not supported!"); } canvas.setTabIndex(0); final SimplePanel panel = new SimplePanel(canvas); panel.setStyleName("content"); Window.addResizeHandler(e -> resizeCanvas()); Scheduler.get().scheduleFinally(() -> resizeCanvas()); return panel; }
Example 5
Source File: CirSim.java From circuitjs1 with GNU General Public License v2.0 | 4 votes |
public Canvas getCircuitAsCanvas(boolean print) { // create canvas to draw circuit into Canvas cv = Canvas.createIfSupported(); Rectangle bounds = getCircuitBounds(); // add some space on edges because bounds calculation is not perfect int wmargin = 140; int hmargin = 100; int w = (bounds.width+wmargin) ; int h = (bounds.height+hmargin) ; cv.setCoordinateSpaceWidth(w); cv.setCoordinateSpaceHeight(h); double oldTransform[] = Arrays.copyOf(transform, 6); Context2d context = cv.getContext2d(); Graphics g = new Graphics(context); context.setTransform(1, 0, 0, 1, 0, 0); double scale = 1; // turn on white background, turn off current display boolean p = printableCheckItem.getState(); boolean c = dotsCheckItem.getState(); if (print) printableCheckItem.setState(true); if (printableCheckItem.getState()) { CircuitElm.whiteColor = Color.black; CircuitElm.lightGrayColor = Color.black; g.setColor(Color.white); } else { CircuitElm.whiteColor = Color.white; CircuitElm.lightGrayColor = Color.lightGray; g.setColor(Color.black); g.fillRect(0, 0, g.context.getCanvas().getWidth(), g.context.getCanvas().getHeight()); } dotsCheckItem.setState(false); if (bounds != null) scale = Math.min(w /(double)(bounds.width+wmargin), h/(double)(bounds.height+hmargin)); scale = Math.min(scale, 1.5); // Limit scale so we don't create enormous circuits in big windows // ScopeElms need the transform array to be updated transform[0] = transform[3] = scale; transform[4] = -(bounds.x-wmargin/2); transform[5] = -(bounds.y-hmargin/2); context.scale(scale, scale); context.translate(transform[4], transform[5]); // draw elements int i; for (i = 0; i != elmList.size(); i++) { getElm(i).draw(g); } // restore everything printableCheckItem.setState(p); dotsCheckItem.setState(c); transform = oldTransform; return cv; }
Example 6
Source File: TexturedCube.java From TGAReader with MIT License | 4 votes |
public void onModuleLoad() { Canvas canvas = Canvas.createIfSupported(); canvas.setStyleName("MyCanvas"); canvas.setCoordinateSpaceWidth(400); canvas.setCoordinateSpaceHeight(400); RootLayoutPanel.get().add(canvas); gl = (WebGLRenderingContext)canvas.getContext("experimental-webgl"); gl.viewport(0, 0, 400, 400); WebGLBuffer vertexBuffer = gl.createBuffer(); gl.bindBuffer(ARRAY_BUFFER, vertexBuffer); gl.bufferData(ARRAY_BUFFER, Float32Array.create(VERTICES), STATIC_DRAW); WebGLShader vertexShader = gl.createShader(VERTEX_SHADER); gl.shaderSource(vertexShader, VERTEX_SHADER_SOURCE); gl.compileShader(vertexShader); WebGLShader fragmentShader = gl.createShader(FRAGMENT_SHADER); gl.shaderSource(fragmentShader, FRAGMENT_SHADER_SOURCE); gl.compileShader(fragmentShader); program = gl.createProgram(); gl.attachShader(program, vertexShader); gl.attachShader(program, fragmentShader); gl.linkProgram(program); gl.useProgram(program); gl.bindBuffer(ARRAY_BUFFER, vertexBuffer); WebGLUniformLocation texture = gl.getUniformLocation(program, "texture"); gl.uniform1i(texture, 0); int posAttr = gl.getAttribLocation(program, "position"); gl.vertexAttribPointer(posAttr, 3, FLOAT, false, 5*4, 0); gl.enableVertexAttribArray(posAttr); int texAttr = gl.getAttribLocation(program, "texcoord"); gl.vertexAttribPointer(texAttr, 2, FLOAT, false, 5*4, 3*4); gl.enableVertexAttribArray(texAttr); for(int i=0; i<TEXTURE_URLS.length; i++) { loadTexture(TEXTURE_URLS[i], i); } }
Example 7
Source File: Util.java From openchemlib-js with BSD 3-Clause "New" or "Revised" License | 3 votes |
public static Canvas createScaledCanvas(int width, int height) { Canvas canvas = Canvas.createIfSupported(); scaleCanvas(canvas, width, height); return canvas; }