Closed Bug 1123297 Opened 7 years ago Closed 7 years ago

webGl draw in texture

Categories

(Core :: Canvas: WebGL, defect)

35 Branch
x86_64
Windows 7
defect
Not set
normal

Tracking

()

RESOLVED DUPLICATE of bug 1125445
Tracking Status
firefox35 --- affected
firefox36 --- affected
firefox37 --- affected
firefox38 --- affected
firefox-esr31 --- unaffected

People

(Reporter: salos, Unassigned)

References

(Blocks 1 open bug)

Details

(Keywords: regression)

Attachments

(2 files)

Attached image chrome.png
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.99 Safari/537.36

Steps to reproduce:

open https://dev.alisgames.com:8081/hero/data-single_test/hero_test.html
click on video to skip, wait until game is loading


Actual results:

text are not draw correct (some text are not draw at all). Firefox 34 works fine. Chrome and Safari works fine


Expected results:

text must be drawn as on attached image (from chrome, in safari works too)
forget to write, all texts are rendered into texture and then texture with whole text is drawn to screen. It seems that first batch is not drawn correct the second one seems to draw correct
Attached image firefox.png
that is how it works in firefox
porbably the cause is that I'm using alpha texture (i.e. texture that has only alpha channel
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, (GLsizei)image.getWidth(), (GLsizei)image.getHeight(), 0, GL_ALPHA, GL_UNSIGNED_BYTE, image.getData());
Could you provide minimal testcase?
And could you try using mozregression tool to find regression? 
( http://mozilla.github.io/mozregression/ )
Flags: needinfo?(salos)
Status: UNCONFIRMED → NEW
Ever confirmed: true
from mozregression

11:21.94 LOG: MainThread Bisector INFO Last good revision: 14665b1de5ee
11:21.94 LOG: MainThread Bisector INFO First bad revision: 5d6ec4dddf14

11:21.94 LOG: MainThread Bisector INFO Narrowed nightly regression window from [2014-09-30, 2014-10-02] (2 days) to [2014-10-01, 2014-10-02] (1 days) (~0 steps left)

creating more minimal test require for me quite a lot of time. If mozreggression info is not enough tell me.
Flags: needinfo?(salos)
Disable ANGLE helps. (however, another Bug 1123573 will raise)
user_pref("webgl.disable-angle", true);
user_pref("webgl.force-enabled", true);
these changes

user_pref("webgl.disable-angle", true);
user_pref("webgl.force-enabled", true);

helps.

I found workaroud without changing prefs. I need to explicitly define when initialize webgl context.
alpha:true

e.g. 
var webGLContextAttributes = {alpha:true};
ctx = canvas.getContext("webgl", webGLContextAttributes) || canvas.getContext("experimental-webgl", webGLContextAttributes);

However this is default value
This might be a windows-specific regression, I can't reproduce it on linux on firefox 35.
Blocks: gecko-games
Status: NEW → RESOLVED
Closed: 7 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1122465
Flags: needinfo?(jgilbert)
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