Demo: custom rendering example resize problem #610

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opened 2016-04-25 08:47:47 +00:00 by erson · 2 comments

erson commented

2016-04-25 08:47:47 +00:00

(Migrated from github.com)

i was playing with the demo.i realised that if i resize canvas it is not hiding all drawing area.

there seems to be rendering bug with drawing canvas.i didnt dig in to it.it could be happening just on demo implementation.

i was playing with the demo.i realised that if i resize canvas it is not hiding all drawing area. ![1](https://cloud.githubusercontent.com/assets/1500710/14777615/e4e5f274-0ad6-11e6-8377-c6c82380b892.png) ![2](https://cloud.githubusercontent.com/assets/1500710/14777616/e4e72022-0ad6-11e6-8574-f95034133c98.png) there seems to be rendering bug with drawing canvas.i didnt dig in to it.it could be happening just on demo implementation.

ocornut commented

2016-04-25 08:52:10 +00:00

(Migrated from github.com)

Yes it is a bug in the demo code, I have noted it in imgui.cpp as:
!- demo: custom render demo pushes a clipping rectangle past parent window bounds. expose ImGui::PushClipRect() from imgui_internal.h?

The code is doing a draw_list->PushClipRect() regardless of the old parent clipping rectangle (which is useful in many cases). I need to expose additional parameter to PushClipRect() to allow doing the union with the parent clipping rectangle and have the demo use that.

Yes it is a bug in the demo code, I have noted it in imgui.cpp as: `!- demo: custom render demo pushes a clipping rectangle past parent window bounds. expose ImGui::PushClipRect() from imgui_internal.h?` The code is doing a `draw_list->PushClipRect()` regardless of the old parent clipping rectangle (which is useful in many cases). I need to expose additional parameter to PushClipRect() to allow doing the union with the parent clipping rectangle and have the demo use that.

👍 1

ocornut commented

2016-04-26 09:04:20 +00:00

(Migrated from github.com)

Fixed and exposed high-level ImGui::PushClipRect() that I've been wanting to expose for a while.