Add ktx
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@@ -0,0 +1,246 @@
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/**
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* Constructs a renderer object.
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* @param {WebGLRenderingContext} gl The GL context.
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* @constructor
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*/
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var Renderer = function(gl) {
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/**
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* The GL context.
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* @type {WebGLRenderingContext}
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* @private
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*/
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this.gl_ = gl;
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/**
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* The WebGLProgram.
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* @type {WebGLProgram}
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* @private
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*/
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this.program_ = gl.createProgram();
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/**
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* @type {WebGLShader}
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* @private
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*/
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this.vertexShader_ = this.compileShader_(
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Renderer.vertexShaderSource_, gl.VERTEX_SHADER);
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/**
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* @type {WebGLShader}
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* @private
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*/
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this.fragmentShader_ = this.compileShader_(
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Renderer.fragmentShaderSource_, gl.FRAGMENT_SHADER);
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/**
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* Cached uniform locations.
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* @type {Object.<string, WebGLUniformLocation>}
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* @private
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*/
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this.uniformLocations_ = {};
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/**
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* Cached attribute locations.
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* @type {Object.<string, WebGLActiveInfo>}
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* @private
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*/
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this.attribLocations_ = {};
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/**
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* A vertex buffer containing a single quad with xy coordinates from [-1,-1]
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* to [1,1] and uv coordinates from [0,0] to [1,1].
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* @private
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*/
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this.quadVertexBuffer_ = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, this.quadVertexBuffer_);
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var vertices = new Float32Array(
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[-1.0, -1.0, 0.0, 1.0,
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+1.0, -1.0, 1.0, 1.0,
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-1.0, +1.0, 0.0, 0.0,
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1.0, +1.0, 1.0, 0.0]);
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gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
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// init shaders
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gl.attachShader(this.program_, this.vertexShader_);
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gl.attachShader(this.program_, this.fragmentShader_);
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gl.bindAttribLocation(this.program_, 0, 'vert');
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gl.linkProgram(this.program_);
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gl.useProgram(this.program_);
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gl.enableVertexAttribArray(0);
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gl.enable(gl.DEPTH_TEST);
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gl.disable(gl.CULL_FACE);
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var count = gl.getProgramParameter(this.program_, gl.ACTIVE_UNIFORMS);
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for (var i = 0; i < /** @type {number} */(count); i++) {
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var info = gl.getActiveUniform(this.program_, i);
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var result = gl.getUniformLocation(this.program_, info.name);
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this.uniformLocations_[info.name] = result;
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}
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count = gl.getProgramParameter(this.program_, gl.ACTIVE_ATTRIBUTES);
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for (var i = 0; i < /** @type {number} */(count); i++) {
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var info = gl.getActiveAttrib(this.program_, i);
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var result = gl.getAttribLocation(this.program_, info.name);
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this.attribLocations_[info.name] = result;
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}
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};
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Renderer.prototype.finishInit = function() {
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this.draw();
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};
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Renderer.prototype.createDxtTexture = function(dxtData, width, height, format) {
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var gl = this.gl_;
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var tex = gl.createTexture();
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gl.bindTexture(gl.TEXTURE_2D, tex);
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gl.compressedTexImage2D(
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gl.TEXTURE_2D,
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0,
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format,
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width,
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height,
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0,
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dxtData);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
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//gl.generateMipmap(gl.TEXTURE_2D)
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gl.bindTexture(gl.TEXTURE_2D, null);
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return tex;
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};
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Renderer.prototype.createCompressedTexture = function(data, width, height, format) {
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var gl = this.gl_;
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var tex = gl.createTexture();
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gl.bindTexture(gl.TEXTURE_2D, tex);
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gl.compressedTexImage2D(
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gl.TEXTURE_2D,
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0,
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format,
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width,
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height,
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0,
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data);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
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//gl.generateMipmap(gl.TEXTURE_2D)
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gl.bindTexture(gl.TEXTURE_2D, null);
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return tex;
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};
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Renderer.prototype.createRgb565Texture = function(rgb565Data, width, height) {
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var gl = this.gl_;
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var tex = gl.createTexture();
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gl.bindTexture(gl.TEXTURE_2D, tex);
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gl.texImage2D(
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gl.TEXTURE_2D,
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0,
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gl.RGB,
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width,
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height,
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0,
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gl.RGB,
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gl.UNSIGNED_SHORT_5_6_5,
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rgb565Data);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
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//gl.generateMipmap(gl.TEXTURE_2D)
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gl.bindTexture(gl.TEXTURE_2D, null);
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return tex;
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};
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Renderer.prototype.drawTexture = function(texture, width, height, mode) {
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var gl = this.gl_;
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// draw scene
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gl.clearColor(0, 0, 0, 1);
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gl.clearDepth(1.0);
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gl.viewport(0, 0, width, height);
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT);
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gl.activeTexture(gl.TEXTURE0);
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.uniform1i(this.uniformLocations_.texSampler, 0);
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var x = 0.0;
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var y = 0.0;
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if (mode == 1)
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x = 1.0;
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else if (mode == 2)
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y = 1.0;
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gl.uniform4f(this.uniformLocations_.control, x, y, 0.0, 0.0);
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gl.enableVertexAttribArray(this.attribLocations_.vert);
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gl.bindBuffer(gl.ARRAY_BUFFER, this.quadVertexBuffer_);
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gl.vertexAttribPointer(this.attribLocations_.vert, 4, gl.FLOAT,
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false, 0, 0);
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gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
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};
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/**
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* Compiles a GLSL shader and returns a WebGLShader.
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* @param {string} shaderSource The shader source code string.
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* @param {number} type Either VERTEX_SHADER or FRAGMENT_SHADER.
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* @return {WebGLShader} The new WebGLShader.
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* @private
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*/
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Renderer.prototype.compileShader_ = function(shaderSource, type) {
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var gl = this.gl_;
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var shader = gl.createShader(type);
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gl.shaderSource(shader, shaderSource);
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gl.compileShader(shader);
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return shader;
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};
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/**
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* @type {string}
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* @private
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*/
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Renderer.vertexShaderSource_ = [
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'attribute vec4 vert;',
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'varying vec2 v_texCoord;',
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'void main() {',
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' gl_Position = vec4(vert.xy, 0.0, 1.0);',
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' v_texCoord = vert.zw;',
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'}'
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].join('\n');
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/**
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* @type {string}
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* @private ' gl_FragColor = texture2D(texSampler, v_texCoord);',
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*/
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Renderer.fragmentShaderSource_ = [
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'precision highp float;',
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'uniform sampler2D texSampler;',
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'uniform vec4 control;',
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'varying vec2 v_texCoord;',
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'void main() {',
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' vec4 c;',
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' c = texture2D(texSampler, v_texCoord);',
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' if (control.x > 0.0)',
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' {',
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' c.w = 1.0;',
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' }',
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' else if (control.y > 0.0)',
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' {',
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' c.rgb = c.aaa; c.w = 1.0;',
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' }',
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' gl_FragColor = c;',
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'}'
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].join('\n');
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