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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /dom/canvas/test/webgl-mochitest/test_hidden_alpha.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/canvas/test/webgl-mochitest/test_hidden_alpha.html')
| -rw-r--r-- | dom/canvas/test/webgl-mochitest/test_hidden_alpha.html | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-mochitest/test_hidden_alpha.html b/dom/canvas/test/webgl-mochitest/test_hidden_alpha.html new file mode 100644 index 0000000000..addc1b0162 --- /dev/null +++ b/dom/canvas/test/webgl-mochitest/test_hidden_alpha.html @@ -0,0 +1,156 @@ +<!DOCTYPE HTML> +<title>WebGL test: Hidden alpha on no-alpha contexts</title> +<script src='/tests/SimpleTest/SimpleTest.js'></script> +<link rel='stylesheet' href='/tests/SimpleTest/test.css'> +<script src='driver-info.js'></script> +<script src='webgl-util.js'></script> +<body> +<script id='vs' type='x-shader/x-vertex'> + attribute vec2 aPosCoord; + + void main(void) { + gl_Position = vec4(aPosCoord, 0.0, 1.0); + } +</script> + +<script id='fs' type='x-shader/x-fragment'> + precision mediump float; + + void main(void) { + gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); + } +</script> +<canvas id='canvas' style='border: none;' width='100' height='100'></canvas> +<script> + +var posCoords_arr = new Float32Array(2 * 4); +var posCoords_buff = null; +function DrawQuad(gl, prog, x0, y0, x1, y1) { + gl.useProgram(prog); + + if (!posCoords_buff) { + posCoords_buff = gl.createBuffer(); + } + gl.bindBuffer(gl.ARRAY_BUFFER, posCoords_buff); + posCoords_arr[0] = x0; + posCoords_arr[1] = y0; + + posCoords_arr[2] = x1; + posCoords_arr[3] = y0; + + posCoords_arr[4] = x0; + posCoords_arr[5] = y1; + + posCoords_arr[6] = x1; + posCoords_arr[7] = y1; + gl.bufferData(gl.ARRAY_BUFFER, posCoords_arr, gl.STREAM_DRAW); + + gl.enableVertexAttribArray(prog.aPosCoord); + gl.vertexAttribPointer(prog.aPosCoord, 2, gl.FLOAT, false, 0, 0); + + gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4); +} + +function DrawSquare(gl, prog, size) { + DrawQuad(gl, prog, -size, -size, size, size); +} + +function Reset(gl) { + gl.canvas.width += 1; + gl.canvas.width -= 1; +} + +function ReadCenterPixel(gl) { + var w = gl.drawingbufferWidth; + var h = gl.drawingbufferHeight; + var ret = new Uint8Array(4); + gl.readPixels(w/2, h/2, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, ret); + return ret; +} + +function Test(gl, prog) { + gl.enable(gl.BLEND); + gl.blendFunc(gl.ZERO, gl.DST_ALPHA); + + var iColor = 64; + var fColor = iColor / 255.0; + + ////////////////// + + ok(true, 'clear(R,G,B,0)'); + + Reset(gl); + + gl.clearColor(fColor, fColor, fColor, 0.0); + gl.clear(gl.COLOR_BUFFER_BIT); + + var dataURL_pre = gl.canvas.toDataURL(); + //console.log('Before blending: ' + dataURL_pre); + + DrawSquare(gl, prog, 0.7); + + var pixel = ReadCenterPixel(gl); + ok(pixel[0] == iColor && + pixel[1] == iColor && + pixel[2] == iColor, 'Color should be the same.'); + ok(pixel[3] == 255, 'No-alpha should always readback as 1.0 alpha.'); + + var dataURL_post = gl.canvas.toDataURL(); + //console.log('After blending: ' + dataURL_post); + ok(dataURL_post == dataURL_pre, + 'toDataURL should be unchanged after blending.'); + + ////////////////// + + ok(true, 'mask(R,G,B,0), clear(R,G,B,1)'); + + Reset(gl); + + gl.colorMask(true, true, true, false); + gl.clearColor(fColor, fColor, fColor, 1.0); + gl.clear(gl.COLOR_BUFFER_BIT); + gl.colorMask(true, true, true, true); + + dataURL_pre = gl.canvas.toDataURL(); + //console.log('Before blending: ' + dataURL_pre); + + DrawSquare(gl, prog, 0.7); + + var pixel = ReadCenterPixel(gl); + ok(pixel[0] == iColor && + pixel[1] == iColor && + pixel[2] == iColor, 'Color should be the same.'); + ok(pixel[3] == 255, 'No-alpha should always readback as 1.0 alpha.'); + ok(gl.getError() == 0, 'Should have no errors.'); + + dataURL_post = gl.canvas.toDataURL(); + //console.log('After blending: ' + dataURL_post); + ok(dataURL_post == dataURL_pre, + 'toDataURL should be unchanged after blending.'); + + ok(true, 'Test complete.'); + SimpleTest.finish(); +} + +(function(){ + var canvas = document.getElementById('canvas'); + var attribs = { + alpha: false, + antialias: false, + premultipliedAlpha: false, + }; + var gl = canvas.getContext('experimental-webgl', attribs); + ok(gl, 'WebGL should work.'); + ok(gl.getParameter(gl.ALPHA_BITS) == 0, 'Shouldn\'t have alpha bits.'); + + var prog = WebGLUtil.createProgramByIds(gl, 'vs', 'fs'); + ok(prog, 'Program should link.'); + prog.aPosCoord = gl.getAttribLocation(prog, 'aPosCoord'); + + SimpleTest.waitForExplicitFinish(); + SimpleTest.requestFlakyTimeout("untriaged"); + setTimeout(function(){ Test(gl, prog); }, 500); +})(); + +</script> +</body> |