ImGui new thread

MoKaLux · April 2021

error: cannot find -llua

error: cannot find -lgideros...
collect2.exe

error: error: ld returned 1 exit status

C:/Qt/Tools/mingw530_32/bin/../lib/gcc/i686-w64-mingw32/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -llua
C:/Qt/Tools/mingw530_32/bin/../lib/gcc/i686-w64-mingw32/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lgideros...
collect2.exe: error: ld returned 1 exit status
mingw32-make[1]: *** [debug\imgui.dll] Error 1
mingw32-make: *** [debug] Error 2

- I have cloned gideros github to my computer: C:\gideros\my_gideros\
- I opened C:\gideros\my_gideros\plugins\imgui\source\Desktop\imgui.pro with Qt5.10.1 (with MinGW)

The errors come from this line in imgui.pro:
43 LIBS += -L"../../../../Sdk/lib/desktop" -llua -lgideros -lgid -lgvfs

and effectively this folder is empty:
C:\gideros\my_gideros\Sdk\lib\desktop\

What am I missing? Any help please

rrraptor · April 2021

MoKaLux said:
and effectively this folder is empty:
C:\gideros\my_gideros\Sdk\lib\desktop\

But it should not

MoKaLux · April 2021

ok so I copied the missing files from gideros installation folder to my gideros folder (c:/gideros/my_gideros/Sdk/lib/desktop) and that worked

I could compile imgui.dll in both debug and release mode.
Now I just need to copy the dll to C:\Program Files (x86)\Gideros\Plugins and test

Thank you for your help rrraptor
EDIT: that seems to work

MoKaLux · April 2021

I don't understand the magic

imgui.h IMGUI_API void TextColored(const ImVec4& col, const char* fmt, ...) IM_FMTARGS(2);
imgui.cpp ImGui::TextColored(GetStyleColorVec4(hovered_id ? ImGuiCol_Text : ImGuiCol_TextDisabled), "Click to break in debugger!");
TextColored(ImVec4(1.0f, 0.4f, 0.4f, 1.0f), "CURRENTLY APPENDING");
imgui_demo.cpp ImGui::TextColored(ImVec4(1.0f, 0.0f, 1.0f, 1.0f), "Pink");
imgui_widgets.cpp
void ImGui::TextColored(const ImVec4& col, const char* fmt, ...)
{ va_list args; va_start(args, fmt); TextColoredV(col, fmt, args); va_end(args); }
imgui_bindings.cpp
int TextColored(lua_State* L) {
const char* text = luaL_checkstring(L, 2);
ImGui::TextColored(GColor::toVec4(luaL_checkinteger(L, 3), luaL_optnumber(L, 4, 1.0f)), "%s", text);
return 0;
}

Every functions seem we should call textColored(0xff0000, 1, "some text") but instead it is used like this: ImGui:textColored(text, color)!?!?
How is this possible? I don't understand!? Is there a secret file?

MoKaLux · April 2021

to delete!

MoKaLux · April 2021

Ok I have tested my commit on my machine and I can say it didn't break anything

(fixes 1 or 2 things see: https://github.com/gideros/gideros/pull/509/files)

here is a modified imgui.dll https://github.com/mokalux/gideros_various you can paste it in your C:\Program Files (x86)\Gideros\Plugins (make a backup of the original), then call require "ImGuiX". I don't know if that works for all platforms or if I need to build those (which I don't know how to yet!)
Let us know if you find other problems.

rrraptor · April 2021

MoKaLux said:

Every functions seem we should call textColored(0xff0000, 1, "some text") but instead it is used like this: ImGui:textColored(text, color)!?!?
How is this possible? I don't understand!? Is there a secret file?

I thought that fmt means format (like LUA string.format), so there is "%s" followed by text argument. And from LUA side it is

textColored("some text", 0xff0000, 1)

Take text argument:

const char* text = luaL_checkstring(L, 2);

Take the color as hex

luaL_checkinteger(L, 3)

Take alpha

luaL_optnumber(L, 4, 1.0f)

Convert color to ImGui format

GColor::toVec4(...)

MoKaLux · April 2021

oh yes that makes sense now that you wrote it

int TextColored(lua_State* L)
{
const char* text = luaL_checkstring(L, 2);
ImGui::TextColored(GColor::toVec4(luaL_checkinteger(L, 3), luaL_optnumber(L, 4, 1.0f)), "%s", text);
return 0;
}

It's the lua function that wins. First argument = string (the text) and then the color (hex, alpha), and it returns nothing (int = 0). Thank you mister

rrraptor · April 2021

Fun fact. ImGui draw lists is faster than gideros particles

Particles: 1 fps (but when using imgui to show fps text, it says 7 fps, and then it slows down to 1)
ImGui draw list: 21-24 fps
Demo code:

USE_IMUGI @ true -- change this line 
 
GW @ 256
GH @ 128
TILE @ 4
HTILE @ &TILE/2&
 
require "FastNoise"
local perlin = Noise.new()
perlin:setNoiseType(Noise.PERLIN)
perlin:setFrequency(0.06)
perlin:setFractalOctaves(5)
 
local ps = Particles.new()
local tf = TextField.new()
tf:setPosition(10,20)
local timer = 0
 
 
require "ImGui"
local ui = ImGui.new()
local IO = ui:getIO()
 
if (not USE_IMUGI) then
	stage:addChild(ps)
	stage:addChild(tf)
else
	stage:addChild(ui)
end
-- actual area size
local REAL = Pixel.new(0xff0000, 0.2, GW,GH)
REAL:setY(11 * TILE)
REAL:setScale(TILE)
stage:addChild(REAL)
 
local function onEnterFrame(e)
	local dt = e.deltaTime
	tf:setText(1//dt)
	timer += dt
	ps:removeParticles()
	for y = 1, GH do 
		for x = 1, GW do 
			local v = (perlin:noise(x, y, timer*10)+1) / 2-- math.random(1, 5) - 1
			if (v > 0) then 
				local sx = (x - 1) * TILE
				local sy = (y + 10) * TILE
				local c = v * 255
				ps:addParticles{{
					x = sx + HTILE, 
					y = sy + HTILE, 
					size = -TILE,
					color = ("0x%02x%02x%02x"):format(c,c,c)
				}}
			end
		end
	end
end
--
 
local function onDrawGui(e)
	ui:newFrame(e)
	ui:value("FPS",IO:getFramerate())
 
	local list = ui:getBackgroundDrawList()
	for y = 1, GH do 
		for x = 1, GW do 
			local v = (perlin:noise(x, y, ui:getTime()*10)+1) / 2-- math.random(1, 5) - 1
			if (v > 0) then 
				local sx = (x - 1) * TILE
				local sy = (y + 10) * TILE
				local c = v * 255
				list:addRectFilled(sx, sy, sx + TILE, sy + TILE, ("0x%02x%02x%02x"):format(c,c,c))
			end
		end
	end
	ui:render()
	ui:endFrame()
end
 
local function onAppResize()
	local minX, minY, maxX, maxY = application:getLogicalBounds()
	local W, H = maxX - minX, maxY - minY
 
	ui:setPosition(minX, minY)
	IO:setDisplaySize(W, H)
end
--
if (USE_IMUGI) then
	onAppResize()
	stage:addEventListener("enterFrame", onDrawGui)
else
	stage:addEventListener("enterFrame", onEnterFrame)
end	
stage:addEventListener("applicationResize", onAppResize)

Also, it seems that gideros have limited amount of triangles that it can draw in a single frame because in this demo actual grid size must be 1024x512, but it shows a 1024x256 rectangle

hgy29 · April 2021

rrraptor said:
Fun fact. ImGui draw lists is faster than gideros particles
...
Also, it seems that gideros have limited amount of triangles that it can draw in a single frame because in this demo actual grid size must be 1024x512, but it shows a 1024x256 rectangle

Interesting. Actually the particle shader is quite convoluted, and probably not efficient for bare rectangles. That may explain the difference.

Gideros isn't limited in number of triangles it can draw in a frame, but it is limited in number of indices it can send to the GPU in a single draw call. I thought it was 64k indices, but 512k triangles would already exceed this. Interesting issue...

SinisterSoft · April 2021

"glGet with argument GL_MAX_ELEMENTS_VERTICES
glGet with argument GL_MAX_ELEMENTS_INDICES"

https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawRangeElements.xhtml

MoKaLux · June 2021

latest imgui doesn't work for me on android and html5

what could be the problem please?
On both html5 and android I have got the same error message:

Uploading finished.
bad argument #3 to '?' (number expected, got string)
stack traceback:
	scenes/levelX.lua:65: in function

line 46 is: self.imgui:render() !
line 65 is: onEnterFrame() !

Not very helpful!? so I disabled all imgui buttons, text, ... one by one to see if I can catch it but no result, always the same error even with no imgui UI only imgui render

Any help would be nice please

PS: player and win export work fine

PS2: I think I found the problem, ImGui.dll was updated (built) for windows only. Now we need to build the updated ImGui for the other platforms (html5, android, ios?, ...). I am trying to set my system up see if I can build those and hopefully make awesome ImGui work on ALL platforms

MoKaLux · June 2021

SinisterSoft said:
@rrraptor I think there is an error with the html5 export.

Sometimes when I call imgui:render() I get an error:
bad argument #3 to '?' (number expected, got string)

This doesn't happen on the Windows player.

What happens just before though is interesting, maybe it happens on Windows too, but not enough to crash it?

This is the test app: https://web.reportcomplete.com/

Here is a link to the unencrypted GApp so you can try it out:
https://web.reportcomplete.com/ReportComplete.GApp.gidz

If you export a project to HTML5, then replace the GApp.gidz file with that one, you should be able to test any HTML5 code modifications to your plugin.

(I'm using the test build of Gideros, so I have your latest version submitted to github)

I am hitting the same wall (see previous post)

SinisterSoft I think the problem is we didn't build the new ImGui for html5, nor android, ios, ... Do you think you can build those? I am stuck with installing python and emsdk

That should solve the issue?

MoKaLux · June 2021

up

hgy29 · June 2021

I always build all parts of Gideros with the same source code, and it seems that the one in Gideros repository is more recent than the one managed by @rrraptor, so I guess Gideros is actually up to date. Unless some changes weren't commited.

SinisterSoft · June 2021

I think the error is with the lua stack and one of the imgui calls. Something is managing to crash Gideros when you use imgui and html5.

keszegh · June 2021

@rrraptor , the above issue with Android would be nice to resolve.

on the other hand finally i started to rework the gui of my app in imgui. when i had separate test project it only had the imgui menu. but now trying to put the whole thing into my app i need to stop mouse (or keyboard) event propagation whenever the mouse click/move/hover etc. is inside an imgui window, but should not stop propagation when i click etc. outside windows. how can i do this? thanks

EDIT: this mouse event capture i could resolve by using IO:wantCaptureMouse() to check if imgui 'has' the mouse.

keszegh · June 2021

i also don't understand how i can set the size of the visible area (outside which things are cropped), similarly the width of mainmenubar (the two questions probably have the same solution).

SinisterSoft · June 2021

I have code now that crashes (only on html5. Others such as android, etc seem ok) - within :render() - every time...

https://web.reportcomplete.com

MoKaLux · June 2021

@SinisterSoft could you post a minimum sample that works on android please?
I tried a couple of things but was not able to use imgui on my old android samsung S5 (maybe that's the problem

). Hope we will get imgui working on all platforms

.

SinisterSoft · June 2021

pm'ed you...

SinisterSoft · June 2021

I think It's important that we get imgui html5 fixed - as pwa is also now working ( https://forum.gideros.rocks/discussion/comment/64963#Comment_64963 ), it means that possibly (in the future) an editor, recoded in Gideros using imgui, could be used to code on any platform.

MoKaLux · June 2021

I agree and I am willing to help fund imgui html5 integration

SinisterSoft · June 2021

Is there an example of a modal (popup window) for Gideros using imgui?

SinisterSoft · June 2021

My app that uses imgui is starting to shape up...

keszegh · June 2021

i'm also finally working on redoing my animation app's gui with imgui and it is going well. but then i will depend on it so it would be great to have a perfectly working imgui plugin.

SinisterSoft · June 2021

I think there is an issue with textWrapped(...

MoKaLux · June 2021

~~DELETED~~ useless comment

The problem here seems to be with your \r\r thing:

-'\n' = Linux
-'\r\n' = Windows
-'\r' = Mac

Without those \r TextWrapped works fine

SinisterSoft · June 2021

Each frame I call this:

	local temp=(application:getTextureMemoryUsage()/1024)
	if temp~=oldUsage then
		oldUsage=temp
		print("Texture usage: "..temp.."MB")
	end

When I use imgui in combination with sceneManager there appears to be a texture memory leek, in my case about 2MB each time a new imgui is created and destroyed.

Any ideas?

Update:

It looks like it's the fonts. Maybe the font texture space is not freed somehow?

MoKaLux · June 2021

I use font like this in scenemanager, didn't check memory leaks though:

LevelX = Core.class(Sprite)
 
function LevelX:init()
	-- bg color
	application:setBackgroundColor(0x6085A6)
	-- app title
	self.mytitle = ButtonMonster.new({
		text="TEXT LINE REMOVER", ttf=font00, textcolorup=0xF2B66D,
	})
	self.mytitle:setPosition(1.7*myappwidth/2, 0.35*myappheight/10)
	self:addChild(self.mytitle)
	-- dear imgui
	self.imgui = ImGui.new()
	local imguiio = self.imgui:getIO()
	local fontatlas = imguiio:getFonts()
	local myfont = fontatlas:addFont("fonts/Cabin-Regular-TTF.ttf", 16*2)
	imguiio:setFontDefault(myfont)
	fontatlas:build()
	self:addChild(self.imgui)
	-- app ui
	self.window01 = true
	self.doctext = "please paste your original text here"
	self.erasefromto = ""
	-- flags
	self.flags = ImGui.WindowFlags_NoDecoration | ImGui.WindowFlags_NoMove
		| ImGui.WindowFlags_NoResize | ImGui.WindowFlags_NoSavedSettings
	-- scene listeners
	self:addEventListener("enterBegin", self.onTransitionInBegin, self)
	self:addEventListener("enterEnd", self.onTransitionInEnd, self)
	self:addEventListener("exitBegin", self.onTransitionOutBegin, self)
	self:addEventListener("exitEnd", self.onTransitionOutEnd, self)
end
 
-- game loop
function LevelX:onEnterFrame(e)
	self.imgui:newFrame(e)
	self.imgui:setNextWindowPos(8, 32*1.5)
	self.window01 = self.imgui:beginWindow("W01", nil, self.flags) -- nil = no close button
	if self.window01 then
		local ischanged = false
		-- display original document text
		if self.imgui:button("PASTE YOUR TEXT FROM THE CLIPBOARD") then
			self.doctext = application:getClipboard()
			self:createOriginalTextTable()
		end
		self.doctext, ischanged = self.imgui:inputTextMultiline("### 1", self.doctext, 8*1024, myappwidth-8*4, 1.5*myappheight/2)
		if ischanged then self:createOriginalTextTable() end
		-- then action erase lines in table from wild card to wild card
		self.erasefromto = self.imgui:inputTextWithHint("### 2", self.erasefromto, "erase lines (from to)", 2*1024)
		self.imgui:sameLine() if self.imgui:button("REMOVE LINES") then self:createFinalTextTable() end
		self.imgui:sameLine() if self.imgui:button("COPY NEW TEXT") then application:setClipboard(self.doctext) end
	end
	self.imgui:endFrame()
	self.imgui:render()
end
 
-- functions
function LevelX:createOriginalTextTable()
	-- ...
end
 
function LevelX:createFinalTextTable()
	-- ...
end
 
-- EVENT LISTENERS
function LevelX:onTransitionInBegin() self:addEventListener(Event.ENTER_FRAME, self.onEnterFrame, self) end
function LevelX:onTransitionInEnd() self:myKeysPressed() end
function LevelX:onTransitionOutBegin() self:removeEventListener(Event.ENTER_FRAME, self.onEnterFrame, self) end
function LevelX:onTransitionOutEnd() end
 
-- KEYS HANDLER
function LevelX:myKeysPressed()
	-- ...
end

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