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update script

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Pavel Dobryakov
2017-12-01 12:53:56 +03:00
parent e999415b2f
commit ea32a628f7
1 changed files with 35 additions and 10 deletions
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45
script.js
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@@ -42,10 +42,24 @@ function getWebGLContext (canvas) {
gl.clearColor(0.0, 0.0, 0.0, 1.0);
var halfFloatTexType = isWebGL2 ? gl.HALF_FLOAT : halfFloat.HALF_FLOAT_OES;
var internalFormat = isWebGL2 ? gl.RGBA16F : gl.RGBA;
var internalFormatRG = isWebGL2 ? gl.RG16F : gl.RGBA;
var formatRG = isWebGL2 ? gl.RG : gl.RGBA;
var halfFloatTexType = isWebGL2 ? gl.HALF_FLOAT : halfFloat.HALF_FLOAT_OES;
var formatRG = isWebGL2 ? gl.RG : gl.RGBA;
if (isWebGL2) {
if (!supportRenderTextureFormat(gl, internalFormatRG, formatRG, halfFloatTexType)) {
internalFormatRG = gl.RGBA16F;
formatRG = gl.RGBA;
ga('send', 'event', 'webgl2', 'rg not supported');
if (!supportRenderTextureFormat(gl, internalFormatRG, formatRG, halfFloatTexType))
{ ga('send', 'event', 'webgl2', 'rgba not supported'); }
}
} else {
if (!supportRenderTextureFormat(gl, internalFormatRG, formatRG, halfFloatTexType))
{ ga('send', 'event', 'webgl', 'rgba not supported'); }
}
return {
gl: gl,
@@ -59,6 +73,25 @@ function getWebGLContext (canvas) {
};
}
function supportRenderTextureFormat (gl, internalFormat, format, type) {
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_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.texImage2D(gl.TEXTURE_2D, 0, internalFormat, 4, 4, 0, format, type, null);
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
if (status != gl.FRAMEBUFFER_COMPLETE)
{ return false; }
return true;
}
function startGUI () {
var gui = new dat.GUI({ width: 300 });
gui.add(config, 'TEXTURE_DOWNSAMPLE', { Full: 0, Half: 1, Quarter: 2 }).name('resolution').onFinishChange(initFramebuffers);
@@ -212,14 +245,6 @@ function createFBO (texId, w, h, internalFormat, format, type, param) {
gl.viewport(0, 0, w, h);
gl.clear(gl.COLOR_BUFFER_BIT);
var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
if (status != gl.FRAMEBUFFER_COMPLETE) {
ga('send', 'pageview', {
'dimension1': status,
'dimension2': isWebGL2
});
}
return [texture, fbo, texId];
}