Canvas drawImage method does not draw
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1
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I have an issue with drawImage function. when I invoke
var paint = ui.Paint();
c.drawImage(backgroundImage, ui.Offset.zero, paint);
The image is drawn on emulator but on Huawei P20 it's not. When I run the app with
flutter run --enable-software-rendering
then the image is loaded but the UI is slow (I'm using photo_view to display the image and the dragging and zooming speed is unacceptable).
Is there any solution to this issue?
dart 
flutter asked Nov 13 at 12:40
RMK
647510
add a comment |
up vote
1
down vote
favorite
I have an issue with drawImage function. when I invoke
var paint = ui.Paint();
c.drawImage(backgroundImage, ui.Offset.zero, paint);
The image is drawn on emulator but on Huawei P20 it's not. When I run the app with
flutter run --enable-software-rendering
then the image is loaded but the UI is slow (I'm using photo_view to display the image and the dragging and zooming speed is unacceptable).
Is there any solution to this issue?
dart flutter asked Nov 13 at 12:40
RMK
647510
post full code to get help. This is quite hard like that
– mcfly
Nov 13 at 14:56
Image widget does work without that switch. I load asset resource. Regarding the code, please see this thread: stackoverflow.com/a/53217074/5492496 I'm using this very same code. What is more, the background image is not loaded when I draw it on the canvas, when I return it directly in MapRenderer.renderMap then everything is fine.
– RMK
Nov 14 at 8:50
As I described, everything works on emulator and on Huawei P20 with the flag. But does not without that flag so there must be some issue with rendering.
– RMK
Nov 15 at 9:06
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I have an issue with drawImage function. when I invoke
var paint = ui.Paint();
c.drawImage(backgroundImage, ui.Offset.zero, paint);
The image is drawn on emulator but on Huawei P20 it's not. When I run the app with
flutter run --enable-software-rendering
then the image is loaded but the UI is slow (I'm using photo_view to display the image and the dragging and zooming speed is unacceptable).
Is there any solution to this issue?
dart flutter asked Nov 13 at 12:40
RMK
647510
I have an issue with drawImage function. when I invoke
var paint = ui.Paint();
c.drawImage(backgroundImage, ui.Offset.zero, paint);
The image is drawn on emulator but on Huawei P20 it's not. When I run the app with
flutter run --enable-software-rendering
then the image is loaded but the UI is slow (I'm using photo_view to display the image and the dragging and zooming speed is unacceptable).
Is there any solution to this issue?
dart flutter dart flutter asked Nov 13 at 12:40
RMK
647510
asked Nov 13 at 12:40
RMK
647510
asked Nov 13 at 12:40
RMK
647510
asked Nov 13 at 12:40
RMK
647510
asked Nov 13 at 12:40
RMK
647510
647510
post full code to get help. This is quite hard like that
– mcfly
Nov 13 at 14:56
Image widget does work without that switch. I load asset resource. Regarding the code, please see this thread: stackoverflow.com/a/53217074/5492496 I'm using this very same code. What is more, the background image is not loaded when I draw it on the canvas, when I return it directly in MapRenderer.renderMap then everything is fine.
– RMK
Nov 14 at 8:50
As I described, everything works on emulator and on Huawei P20 with the flag. But does not without that flag so there must be some issue with rendering.
– RMK
Nov 15 at 9:06
add a comment |
post full code to get help. This is quite hard like that
– mcfly
Nov 13 at 14:56
Image widget does work without that switch. I load asset resource. Regarding the code, please see this thread: stackoverflow.com/a/53217074/5492496 I'm using this very same code. What is more, the background image is not loaded when I draw it on the canvas, when I return it directly in MapRenderer.renderMap then everything is fine.
– RMK
Nov 14 at 8:50
As I described, everything works on emulator and on Huawei P20 with the flag. But does not without that flag so there must be some issue with rendering.
– RMK
Nov 15 at 9:06
post full code to get help. This is quite hard like that
– mcfly
Nov 13 at 14:56
post full code to get help. This is quite hard like that
– mcfly
Nov 13 at 14:56
Image widget does work without that switch. I load asset resource. Regarding the code, please see this thread: stackoverflow.com/a/53217074/5492496 I'm using this very same code. What is more, the background image is not loaded when I draw it on the canvas, when I return it directly in MapRenderer.renderMap then everything is fine.
– RMK
Nov 14 at 8:50
Image widget does work without that switch. I load asset resource. Regarding the code, please see this thread: stackoverflow.com/a/53217074/5492496 I'm using this very same code. What is more, the background image is not loaded when I draw it on the canvas, when I return it directly in MapRenderer.renderMap then everything is fine.
– RMK
Nov 14 at 8:50
As I described, everything works on emulator and on Huawei P20 with the flag. But does not without that flag so there must be some issue with rendering.
– RMK
Nov 15 at 9:06
As I described, everything works on emulator and on Huawei P20 with the flag. But does not without that flag so there must be some issue with rendering.
– RMK
Nov 15 at 9:06
add a comment |
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post full code to get help. This is quite hard like that
– mcfly
Nov 13 at 14:56
Image widget does work without that switch. I load asset resource. Regarding the code, please see this thread: stackoverflow.com/a/53217074/5492496 I'm using this very same code. What is more, the background image is not loaded when I draw it on the canvas, when I return it directly in MapRenderer.renderMap then everything is fine.
– RMK
Nov 14 at 8:50
As I described, everything works on emulator and on Huawei P20 with the flag. But does not without that flag so there must be some issue with rendering.
– RMK
Nov 15 at 9:06