mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-04-04 18:06:22 +03:00
565baee64b
Handled __EMSCRIPTEN__ macros to:
- Workaround atomics (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 is undefined, but GCC atomics are provided).
- Suppress non-standard header <sys/signal.h> warning.
- Return OSD_LinuxREDHAT.
- Avoid inclusion of XLib headers.
- Skip fontconfig library.
- Enable EGL+GLES path (translated by Emscripten into WebGL).
- Skip eglCreatePbufferSurface() not implemented by Emscripten EGL.
Fixed Graphic3d_Vec4.hxx usage within Quantity_ColorRGBA.hxx.
OpenGl_ShaderManager::defaultGlslVersion() now prefers GLSL 300 es when WebGL 2.0 is available,
as there no any OpenGL ES greater than 3.0 emulation so far.
Shaders_Declarations.glsl - added workaround for GLSL compilation on WebGL 1.0
by defining Light properties accessors as macros instead of functions
('[]' : Index expression must be constant).
OpenGl_FrameBuffer::Init() - added workaround for initialization of GL_DEPTH24_STENCIL8
depth-stencil attachment on WebGL 1.0 + GL_WEBGL_depth_texture extension.
OpenGl_Context::Vec4FromQuantityColor() now considers myIsSRgbActive flag
to handle use case, when Immediate Layer is drawn directly into window buffer,
which is not sRGB-ready.
Added new sample - OCCT WebGL viewer.
134 lines
4.4 KiB
HTML
134 lines
4.4 KiB
HTML
<!DOCTYPE html>
|
|
<html lang=en-us>
|
|
<head>
|
|
<meta charset=utf-8><meta content="text/html; charset=utf-8" http-equiv=Content-Type>
|
|
<link rel="shortcut icon" href="lamp.ico" type="image/x-icon" />
|
|
<title>OCCT WebGL Viewer Sample</title>
|
|
</head>
|
|
<body>
|
|
|
|
<h2>OCCT WebGL Viewer Sample</h2>
|
|
<div>
|
|
<canvas id=canvas oncontextmenu=event.preventDefault() tabindex=-1 style="border:0 none;background-color:#000" width="409" height="409"></canvas>
|
|
<img id=occlogo src="OCC_logo.png" style="position: absolute; left: 20px; top: 0px; z-index: 2;" />
|
|
</div>
|
|
|
|
<div><label for="fileInput">Choose BREP file to upload: </label><input type="file" id="fileInput" accept=".brep"></div>
|
|
<h4>Console output:</h4>
|
|
<p id="output"></p>
|
|
<script>
|
|
//! Resize canvas to fit into window.
|
|
function updateCanvasSize()
|
|
{
|
|
// size of canvas in logical (density-independent) units
|
|
var aSizeX = Math.min (window.innerWidth, window.screen.availWidth);
|
|
var aSizeY = Math.min (window.innerHeight, window.screen.availHeight);
|
|
aSizeX = Math.max (300, aSizeX - 30);
|
|
aSizeY = Math.max (300, aSizeY / 2);
|
|
canvas.style.width = aSizeX + "px";
|
|
canvas.style.height = aSizeY + "px";
|
|
|
|
// drawing buffer size (aka backing store)
|
|
var aDevicePixelRatio = window.devicePixelRatio || 1;
|
|
canvas.width = aSizeX * aDevicePixelRatio;
|
|
canvas.height = aSizeY * aDevicePixelRatio;
|
|
|
|
occlogo.style.top = (aSizeY - 30) + "px";
|
|
}
|
|
window.onresize = updateCanvasSize;
|
|
updateCanvasSize();
|
|
|
|
//! Check browser support.
|
|
function isWasmSupported()
|
|
{
|
|
try {
|
|
if (typeof WebAssembly === "object"
|
|
&& typeof WebAssembly.instantiate === "function") {
|
|
const aDummyModule = new WebAssembly.Module (Uint8Array.of (0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00));
|
|
if (aDummyModule instanceof WebAssembly.Module)
|
|
{
|
|
return new WebAssembly.Instance(aDummyModule) instanceof WebAssembly.Instance;
|
|
}
|
|
}
|
|
} catch (e) {}
|
|
return false;
|
|
}
|
|
if (!isWasmSupported())
|
|
{
|
|
var anElement = document.getElementById('output');
|
|
anElement.innerHTML += "Browser is too old - WebAssembly support is missing!<br>Please check updates or install a modern browser.<br>";
|
|
}
|
|
|
|
//! Define OCCT WebGL Viewer module.
|
|
var Module =
|
|
{
|
|
print: (function() {
|
|
var anElement = document.getElementById('output');
|
|
return function(theText) { anElement.innerHTML += theText + "<br>"; };
|
|
})(),
|
|
printErr: function(theText) {
|
|
//var anElement = document.getElementById('output');
|
|
//anElement.innerHTML += theText + "<br>";
|
|
},
|
|
canvas: (function() {
|
|
var aCanvas = document.getElementById('canvas');
|
|
return aCanvas;
|
|
})()
|
|
};
|
|
|
|
//! Handle file uploading.
|
|
fileInput.onchange = function()
|
|
{
|
|
if (fileInput.files.length == 0) { return; }
|
|
// Warning! Entire file is pre-loaded into memory.
|
|
var aFile = fileInput.files[0];
|
|
var aReader = new FileReader();
|
|
aReader.onload = function()
|
|
{
|
|
var aDataArray = new Uint8Array (aReader.result);
|
|
var aNameArray = new Uint8Array (toUtf8Array (aFile.name));
|
|
const aDataBuffer = Module._malloc(aDataArray.length);
|
|
const aNameBuffer = Module._malloc(aNameArray.length);
|
|
Module.HEAPU8.set(aNameArray, aNameBuffer);
|
|
Module.HEAPU8.set(aDataArray, aDataBuffer);
|
|
Module.ccall('onFileDataRead', null, ['number', 'number', 'number'], [aNameBuffer, aDataBuffer, aDataArray.length]);
|
|
Module._free(aDataBuffer);
|
|
Module._free(aNameBuffer);
|
|
fileInput.value = '';
|
|
};
|
|
aReader.readAsArrayBuffer(aFile);
|
|
};
|
|
|
|
//! Convert string into UTF-8 array.
|
|
function toUtf8Array (theText)
|
|
{
|
|
var aRes = [];
|
|
for (var aCharIter = 0; aCharIter < theText.length; ++aCharIter)
|
|
{
|
|
var aCharCode = theText.charCodeAt (aCharIter);
|
|
if (aCharCode < 0x80)
|
|
{
|
|
aRes.push (aCharCode);
|
|
}
|
|
else if (aCharCode < 0x800)
|
|
{
|
|
aRes.push (0xc0 | (aCharCode >> 6), 0x80 | (aCharCode & 0x3f));
|
|
}
|
|
else if (aCharCode < 0xd800 || aCharCode >= 0xe000)
|
|
{
|
|
aRes.push (0xe0 | (aCharCode >> 12), 0x80 | ((aCharCode>>6) & 0x3f), 0x80 | (aCharCode & 0x3f));
|
|
}
|
|
else
|
|
{
|
|
++aCharIter;
|
|
aCharCode = 0x10000 + (((aCharCode & 0x3ff)<<10) | (theText.charCodeAt (aCharIter) & 0x3ff));
|
|
aRes.push(0xf0 | (aCharCode >>18), 0x80 | ((aCharCode>>12) & 0x3f), 0x80 | ((aCharCode>>6) & 0x3f), 0x80 | (aCharCode & 0x3f));
|
|
}
|
|
}
|
|
return aRes;
|
|
}
|
|
</script>
|
|
<script type="text/javascript" src="occt-webgl-sample.js" charset="utf-8"></script>
|
|
</body>
|
|
</html>
|