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fix(rendering): test norm16 linear to decide on using it (#1801)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| const canvasSize = 4; | ||
| const texWidth = 5; | ||
| const texHeight = 1; | ||
| const pixelToCheck = [1, 1]; | ||
|
|
||
| function main({ ext, filterType, texData, internalFormat, glDataType }) { | ||
| try { | ||
| const canvas = document.createElement('canvas'); | ||
| canvas.width = canvasSize; | ||
| canvas.height = canvasSize; | ||
| const gl = canvas.getContext('webgl2'); | ||
| if (!gl) { | ||
| return false; | ||
| } | ||
|
|
||
| const vs = `#version 300 es | ||
| void main() { | ||
| gl_PointSize = ${canvasSize.toFixed(1)}; | ||
| gl_Position = vec4(0, 0, 0, 1); | ||
| } | ||
| `; | ||
| const fs = `#version 300 es | ||
| precision highp float; | ||
| precision highp int; | ||
| precision highp sampler2D; | ||
| uniform sampler2D u_image; | ||
| out vec4 color; | ||
| void main() { | ||
| vec4 intColor = texture(u_image, gl_PointCoord.xy); | ||
| color = vec4(vec3(intColor.rrr), 1); | ||
| } | ||
| `; | ||
|
|
||
| let extToUse; | ||
| if (ext) { | ||
| extToUse = gl.getExtension(ext); | ||
| if (!extToUse) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| const vertexShader = gl.createShader(gl.VERTEX_SHADER); | ||
| gl.shaderSource(vertexShader, vs); | ||
| gl.compileShader(vertexShader); | ||
| if (!gl.getShaderParameter(vertexShader, gl.COMPILE_STATUS)) { | ||
| return false; | ||
| } | ||
|
|
||
| const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER); | ||
| gl.shaderSource(fragmentShader, fs); | ||
| gl.compileShader(fragmentShader); | ||
| if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS)) { | ||
| return false; | ||
| } | ||
|
|
||
| const program = gl.createProgram(); | ||
| gl.attachShader(program, vertexShader); | ||
| gl.attachShader(program, fragmentShader); | ||
| gl.linkProgram(program); | ||
|
|
||
| if (!gl.getProgramParameter(program, gl.LINK_STATUS)) { | ||
| return false; | ||
| } | ||
|
|
||
| const tex = gl.createTexture(); | ||
| gl.bindTexture(gl.TEXTURE_2D, tex); | ||
| gl.texImage2D( | ||
| gl.TEXTURE_2D, | ||
| 0, | ||
| internalFormat(gl, extToUse), | ||
| texWidth, | ||
| texHeight, | ||
| 0, | ||
| gl.RED, | ||
| glDataType(gl, extToUse), | ||
| texData | ||
| ); | ||
|
|
||
| const filter = filterType === 'LINEAR' ? gl.LINEAR : gl.NEAREST; | ||
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, filter); | ||
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, filter); | ||
| gl.useProgram(program); | ||
| gl.drawArrays(gl.POINTS, 0, 1); | ||
|
|
||
| const pixel = new Uint8Array(4); | ||
| gl.readPixels( | ||
| pixelToCheck[0], | ||
| pixelToCheck[1], | ||
| 1, | ||
| 1, | ||
| gl.RGBA, | ||
| gl.UNSIGNED_BYTE, | ||
| pixel | ||
| ); | ||
| const [r, g, b] = pixel; | ||
|
|
||
| const webglLoseContext = gl.getExtension('WEBGL_lose_context'); | ||
| if (webglLoseContext) { | ||
| webglLoseContext.loseContext(); | ||
| } | ||
|
|
||
| return r === g && g === b && r !== 0; | ||
| } catch (e) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| export function getSupportedTextureFormats() { | ||
| const norm16TexData = new Int16Array([ | ||
| 32767, 2000, 3000, 4000, 5000, 16784, 7000, 8000, 9000, 32767, | ||
| ]); | ||
|
|
||
| // const floatTexData = new Float32Array([0.3, 0.2, 0.3, 0.4, 0.5]); | ||
| // const halfFloatTexData = new Uint16Array([13517, 12902, 13517, 13926, 14336]); | ||
|
|
||
| return { | ||
| norm16: main({ | ||
| ext: 'EXT_texture_norm16', | ||
| filterType: 'NEAREST', | ||
| texData: norm16TexData, | ||
| internalFormat: (gl, ext) => ext.R16_SNORM_EXT, | ||
| glDataType: (gl) => gl.SHORT, | ||
| }), | ||
| norm16Linear: main({ | ||
| ext: 'EXT_texture_norm16', | ||
| filterType: 'LINEAR', | ||
| texData: norm16TexData, | ||
| internalFormat: (gl, ext) => ext.R16_SNORM_EXT, | ||
| glDataType: (gl) => gl.SHORT, | ||
| }), | ||
| // float: main({ | ||
| // filterType: 'NEAREST', | ||
| // texData: floatTexData, | ||
| // internalFormat: (gl) => gl.R16F, | ||
| // glDataType: (gl) => gl.FLOAT, | ||
| // }), | ||
| // floatLinear: main({ | ||
| // ext: 'OES_texture_float_linear', | ||
| // filterType: 'LINEAR', | ||
| // texData: floatTexData, | ||
| // internalFormat: (gl) => gl.R16F, | ||
| // glDataType: (gl) => gl.FLOAT, | ||
| // }), | ||
| // halfFloat: main({ | ||
| // filterType: 'NEAREST', | ||
| // texData: halfFloatTexData, | ||
| // internalFormat: (gl) => gl.R16F, | ||
| // glDataType: (gl) => gl.HALF_FLOAT, | ||
| // }), | ||
| // halfFloatLinear: main({ | ||
| // filterType: 'LINEAR', | ||
| // texData: halfFloatTexData, | ||
| // internalFormat: (gl) => gl.R16F, | ||
| // glDataType: (gl) => gl.HALF_FLOAT, | ||
| // }), | ||
| }; | ||
| } |
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