Antialiasing on an FBO requires FBO multisampling and framebuffer blit support.
Do you have these extensions available?
Cheers,
Gunnar
On 3. mai 2013, at 00:04, "Mark" <mark...@gmail.com> wrote:
> On Thu, May 2, 2013 at 11:47 PM, Mark <mark...@gmail.com> wrote:
>> On Tue, Mar 12, 2013 at 12:22 AM, Bache-Wiig Jens
>> <jens.bache-w...@digia.com> wrote:
>>>> Hi,
>>>> Sorry for delay, I had not seen your question
>>>> To enable antialiasing in Qt Quick Canvas, you must set the property
>>>> "antialiasing" to "true" and set the property "renderTarget" to
>>>> "Canvas.Image"
>>>> Guillaume
>>>
>>> True. It might also be worth mentioning that we also plan to make this the
>>> default setting on Canvas items in Qt 5.1.
>>>
>>> Jens
>>>
>>>>
>>>> On Fri, Feb 15, 2013 at 7:49 PM, Mark <markg85 at gmail.com
>>>>> wrote:
>>>> Hi,
>>>>
>>>> I'm drawing some shapes on Windows 7 with QML Canvas, but the output
>>>>
>>>> really seems aliased as in the anti-aliasing is off.
>>>>
>>>> The code:
>>>>
>>>> import QtQuick 2.0
>>>>
>>>> Item {
>>>>
>>>> width: 400
>>>>
>>>> height: 400
>>>>
>>>> Canvas {
>>>>
>>>> id:canvas
>>>>
>>>> width:400
>>>>
>>>> height:400
>>>>
>>>> antialiasing: true
>>>>
>>>> property string strokeStyle:"green"
>>>>
>>>> property string fillStyle:"yellow"
>>>>
>>>> property int lineWidth:10
>>>>
>>>> property bool fill:true
>>>>
>>>> property bool stroke:true
>>>>
>>>> onPaint: {
>>>>
>>>> var ctx = canvas.getContext('2d');
>>>>
>>>> ctx.save();
>>>>
>>>> ctx.clearRect(0, 0, canvas.width, canvas.height);
>>>>
>>>> ctx.strokeStyle = canvas.strokeStyle;
>>>>
>>>> ctx.fillStyle = canvas.fillStyle;
>>>>
>>>> ctx.lineWidth = canvas.lineWidth;
>>>>
>>>> ctx.arc(75,75,50,0,Math.PI*2,true); // Outer circle
>>>>
>>>> if (canvas.fill)
>>>>
>>>> ctx.fill();
>>>>
>>>> if (canvas.stroke)
>>>>
>>>> ctx.stroke();
>>>>
>>>> ctx.restore();
>>>>
>>>> }
>>>>
>>>> }
>>>>
>>>> }
>>>>
>>>> I'm using Qt 5.0.1 mingw build x86 on Windows 7.
>>>>
>>>> Cheers,
>>>>
>>>> Mark
>>>>
>>>>
>>>> Anyone?
>>>>
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>>>
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>>
>> Hi,
>>
>> A late followup on this one. I just tried out
>> http://download.qt-project.org/snapshots/qt/5.1/5.1.0-beta1/backups/2013-05-02-11/qt-windows-opensource-5.1.0-beta1-mingw47-x86-offline-2013-05-02-11.exe
>> and ran the example in:
>> C:\Qt\Qt5.1.0\5.1.0-beta1\mingw47_32\examples\quick\canvas. I noticed
>> (quite fast) that antialiasing is not enabled.
>>
>> Another ANGLE issue?
>>
>> My graphics card is an nvidia one with an intel cpu so i guess the
>> hardware setup is roughly ideal.
>>
>> Any reason why antialiasing is not on?
>>
>> Cheers,
>> Mark
>
> Note: it does properly antialias when i set the renderTarget to
> Canvas.Image but i suppose it should just work with
> Canvas.FramebufferObject as well. I also tried the opengl package
> http://download.qt-project.org/snapshots/qt/5.1/5.1.0-beta1/backups/2013-05-02-11/qt-windows-opensource-5.1.0-beta1-msvc2012_opengl-x86_64-offline-2013-05-02-11.exe
> which works exactly the same as the mingw one. Don't know if both ones
> are using angle or not but i tried nonetheless.
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