Picking error 1281 for readPixels with MacOSX Chromium 6.0.452.0 (51117
Reported by lindsay.kay (at xeolabs) | August 4th, 2010 @ 06:01 AM | in V0.7.7
OS: MacOSX Chromium 6.0.452.0 (51117) when testing picking with http://scenejs.org/previews/scenejs-0.7.7.0/examples/basic-picking/...
Debug log:
LOG START << s0: Creating shader: 'theCanvas;;;dirsddirsddirsd;;ttf'
Picking at (464, 67)
s0: Binding pick buffer
s0: Mapping pick index to color/node: 0 => {r:0.00390625,
g:0, b:1}
spheres
s0: Registering node as "picked" event listener: SID path = {spheres}
s0: Mapping pick index to color/node: 1 => {r:0.0078125, g:0,
b:1}
spheres/blue-group
s0: Mapping pick index to color/node: 2 => {r:0.01171875,
g:0, b:1}
spheres/blue-group/right-blue-sphere
s0: Creating shader: 'theCanvas;picking'
s0: Mapping pick index to color/node: 3 => {r:0.015625, g:0,
b:1} left-
blue-sphere
s0: Mapping pick index to color/node: 4 => {r:0.01953125,
g:0, b:1}
green-group
s0: Registering node as "picked" event listener: SID path =
{green-
group}
s0: Mapping pick index to color/node: 5 => {r:0.0234375, g:0,
b:1}
green-group/right-green-sphere
s0: Registering node as "picked" event listener: SID path =
{green-
group/right-green-sphere}
s0: Mapping pick index to color/node: 6 => {r:0.02734375,
g:0, b:1}
left-green-sphere
s0: Registering node as "picked" event listener: SID path =
{left-
green-sphere}
s0: Mapping pick index to color/node: 7 => {r:0.03125, g:0,
b:1} red-
group
s0: Mapping pick index to color/node: 8 => {r:0.03515625,
g:0, b:1}
red-group/red-group-sphere
WebGL error calling readPixels on WebGL canvas context - see
console
log for details
Reading pick buffer - picked pixel(464, 67) = {r:0, g:0, b:0}
Unbinding pick buffer
Finished rendering..
No nodes picked
LOG ENDS <<
uses :
function readPickBuffer() {
var context = boundPickBuf.canvas.context;
/// >>> THIS WILL BLOW UP with magic error 1281 for readPixels
var pix = context.readPixels(pickX,
boundPickBuf.canvas.canvas.height - pickY, 1, 1,
context.RGBA,
context.UNSIGNED_BYTE);
if (!pix) { // http://asalga.wordpress.com/2010/07/14/compensating-for-webgl-readpixels-spec-changes/
pix = new WebGLUnsignedByteArray(4);
context.readPixels(pickX, boundPickBuf.canvas.height -
pickY, 1, 1, context.RGBA, context.UNSIGNED_BYTE, pix);
}
if (debugCfg.logTrace) {
SceneJS._loggingModule.info("Reading pick buffer - picked
pixel(" + pickX + ", " + pickY + ") = {r:" + pix[0] + ", g:" +
pix[1]
+ ", b:" + pix[2] + "}");
}
pickedNodeIndex = (pix[0] + pix[1] * 256) - 1;
}
Comments and changes to this ticket
-
rcoenen September 2nd, 2010 @ 12:33 PM
I am getting:
Chromium 7.0.509.0 (57813) (MaxOSX)
Log
s0: Creating shader: 'theCanvas;;;dirsddirsddirsd;;ttf'
s0: Creating shader: 'theCanvas;picking'javascript:
SceneJS V0.7.8 initialised
/previews/scenejs-0.7.7.0/lib/scenejs.js:4644 SceneJS.Scene binding to canvas 'theCanvas' /previews/scenejs-0.7.7.0/lib/scenejs.js:4644 SceneJS.Scene logging to element with ID 'theLoggingDiv' - logging to browser console also /previews/scenejs-0.7.7.0/lib/scenejs.js:4644 Scene defined: s0 /previews/scenejs-0.7.7.0/lib/scenejs.js:4644 s0: Creating shader: 'theCanvas;;;dirsddirsddirsd;;ttf' /previews/scenejs-0.7.7.0/lib/scenejs.js:4644 s0: Creating shader: 'theCanvas;picking' /previews/scenejs-0.7.7.0/lib/scenejs.js:21146 Uncaught ReferenceError: WebGLUnsignedByteArray is not defined -
rcoenen September 2nd, 2010 @ 12:36 PM
and
Safari (WebKit nightly, MacOSX) Version 5.0.1 (6533.17.8, r66574)Log
s0: Creating shader: 'theCanvas;;;dirsddirsddirsd;;ttf'
s0: Creating shader: 'theCanvas;picking'Javascript:
scenejs.js:4644SceneJS V0.7.8 initialised
scenejs.js:4644SceneJS.Scene binding to canvas 'theCanvas'
scenejs.js:4644SceneJS.Scene logging to element with ID 'theLoggingDiv' - logging to browser console also
scenejs.js:4644Scene defined: s0
scenejs.js:4644s0: Creating shader: 'theCanvas;;;dirsddirsddirsd;;ttf'
scenejs.js:4644s0: Creating shader: 'theCanvas;picking'
scenejs.js:21146ReferenceError: Can't find variable: WebGLUnsignedByteArray -
-
rcoenen September 5th, 2010 @ 11:25 AM
Hi Linday- thanks for the reply. I have just tested your last fix (becf8ff3e94f9e0c196e) and it worked.
The 2 picking demo's in /examples/ now run correctly. -
lindsay.kay (at xeolabs) September 5th, 2010 @ 11:36 AM
- State changed from “open” to “resolved”
-
lindsay.kay (at xeolabs) September 5th, 2010 @ 11:37 AM
- no changes were found...
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SceneJS provides easy access to WebGL through a simple and declarative JavaScript API. The SceneJS API is functional, which enables its scene definitions to be really compact and expressive, while hooking into other JavaScript code just that little bit more smoothly.
lindsay.kay (at xeolabs)
rcoenen