init

xhs-mini-demos/component-case/camera/camera.js

@@ -0,0 +1,224 @@
+const vs = `
+  attribute vec3 aPos;
+  attribute vec2 aVertexTextureCoord;
+  varying highp vec2 vTextureCoord;
+
+  void main(void){
+    gl_Position = vec4(aPos, 1);
+    vTextureCoord = aVertexTextureCoord;
+  }
+`;
+
+const fs = `
+  varying highp vec2 vTextureCoord;
+  uniform sampler2D uSampler;
+
+  void main(void) {
+    gl_FragColor = texture2D(uSampler, vTextureCoord);
+  }
+`;
+
+const vertex = [
+  -1, -1, 0.0,
+  1, -1, 0.0,
+  1, 1, 0.0,
+  -1, 1, 0.0,
+];
+
+const vertexIndice = [
+  0, 1, 2,
+  0, 2, 3,
+];
+
+const texCoords = [
+  0.0, 0.0,
+  1.0, 0.0,
+  1.0, 1.0,
+  0.0, 1.0,
+];
+function createShader(gl, src, type) {
+  const shader = gl.createShader(type);
+  gl.shaderSource(shader, src);
+  gl.compileShader(shader);
+
+  if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
+    console.error(`Error compiling shader: ${gl.getShaderInfoLog(shader)}`);
+  }
+  return shader;
+}
+
+const buffers = {};
+
+function createRenderer(canvas, width, height) {
+  const gl = canvas.getContext('webgl');
+  if (!gl) {
+    console.error('Unable to get webgl context.');
+    return;
+  }
+
+  const info = xhs.getSystemInfoSync();
+  gl.canvas.width = info.pixelRatio * width;
+  gl.canvas.height = info.pixelRatio * height;
+  gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
+
+  const vertexShader = createShader(gl, vs, gl.VERTEX_SHADER);
+  const fragmentShader = createShader(gl, fs, gl.FRAGMENT_SHADER);
+
+  const program = gl.createProgram();
+  gl.attachShader(program, vertexShader);
+  gl.attachShader(program, fragmentShader);
+  gl.linkProgram(program);
+
+  if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
+    console.error('Unable to initialize the shader program.');
+    return;
+  }
+
+  gl.useProgram(program);
+
+  const texture = gl.createTexture();
+  gl.activeTexture(gl.TEXTURE0);
+  gl.bindTexture(gl.TEXTURE_2D, texture);
+  gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+  gl.bindTexture(gl.TEXTURE_2D, null);
+
+  buffers.vertexBuffer = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, buffers.vertexBuffer);
+  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertex), gl.STATIC_DRAW);
+
+  buffers.vertexIndiceBuffer = gl.createBuffer();
+  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, buffers.vertexIndiceBuffer);
+  gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(vertexIndice), gl.STATIC_DRAW);
+
+  const aVertexPosition = gl.getAttribLocation(program, 'aPos');
+  gl.vertexAttribPointer(aVertexPosition, 3, gl.FLOAT, false, 0, 0);
+  gl.enableVertexAttribArray(aVertexPosition);
+
+  buffers.trianglesTexCoordBuffer = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, buffers.trianglesTexCoordBuffer);
+  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(texCoords), gl.STATIC_DRAW);
+
+  const vertexTexCoordAttribute = gl.getAttribLocation(program, 'aVertexTextureCoord');
+  gl.enableVertexAttribArray(vertexTexCoordAttribute);
+  gl.vertexAttribPointer(vertexTexCoordAttribute, 2, gl.FLOAT, false, 0, 0);
+
+  const samplerUniform = gl.getUniformLocation(program, 'uSampler');
+  gl.uniform1i(samplerUniform, 0);
+
+  return (arrayBuffer, width, height) => {
+    gl.bindTexture(gl.TEXTURE_2D, texture);
+    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, arrayBuffer);
+    gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);
+  };
+}
+
+Page({
+  onShareAppMessage() {
+    return {
+      title: 'camera',
+      path: 'page/component/pages/camera/camera',
+    };
+  },
+
+  data: {
+    src: '',
+    videoSrc: '',
+    position: 'back',
+    mode: 'scanCode',
+    result: {},
+    frameWidth: 0,
+    frameHeight: 0,
+    width: 288,
+    height: 358,
+    showCanvas: false,
+  },
+
+  onReady() {
+    this.ctx = xhs.createCameraContext();
+    // const selector = xhs.createSelectorQuery();
+    // selector.select('#webgl')
+    // .node(this.init)
+    // .exec()
+  },
+  init(res) {
+    if (this.listener) {
+      this.listener.stop();
+    }
+    const canvas = res.node;
+    const render = createRenderer(canvas, this.data.width, this.data.height);
+
+    // if (!render || typeof render !== 'function') return
+
+    this.listener = this.ctx.onCameraFrame(frame => {
+      render(new Uint8Array(frame.data), frame.width, frame.height);
+
+      const {
+        frameWidth,
+        frameHeight,
+      } = this.data;
+
+      if (frameWidth === frame.width && frameHeight == frame.height) return;
+      this.setData({
+        frameWidth: frame.width,
+        frameHeight: frame.height,
+
+      });
+    });
+    this.listener.start();
+  },
+  takePhoto() {
+    this.ctx.takePhoto({
+      quality: 'high',
+      success: res => {
+        this.setData({
+          src: res.tempImagePath,
+        });
+      },
+    });
+  },
+  startRecord() {
+    this.ctx.startRecord({
+      success: () => {
+        console.log('startRecord');
+      },
+    });
+  },
+  stopRecord() {
+    this.ctx.stopRecord({
+      success: res => {
+        this.setData({
+          src: res.tempThumbPath,
+          videoSrc: res.tempVideoPath,
+        });
+      },
+    });
+  },
+  togglePosition() {
+    this.setData({
+      position: this.data.position === 'front'
+        ? 'back' : 'front',
+    });
+  },
+  error(e) {
+    console.log(e.detail);
+  },
+
+  handleShowCanvas() {
+    const that = this;
+
+    this.setData({
+      showCanvas: !this.data.showCanvas,
+    }, () => {
+      if (this.data.showCanvas) {
+        const selector = xhs.createSelectorQuery();
+        selector.select('#webgl')
+          .node(this.init)
+          .exec();
+      }
+    });
+  },
+});