igImage showing wrong image, igImageButton is completely white.

[zeyonaut]

Steps to reproduce: Be on Mac OS X 10.11. Install dub dependency imageformats and import it into imgui_d_test (your repo). Before void main:

GLuint tex = 0; 
IFImage im;

After initialization:

im = read_image("/Users/Home/whatever.png", 4);
    glGenTextures(1, &tex);
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, cast(int)im.w, cast(int)im.h, 0, GL_RGBA, GL_UNSIGNED_BYTE, &im.pixels);

Then, in a window, igImage( &tex, ImVec2(im.w, im.h), ImVec2(0,0), ImVec2(1,1), ImVec4(255,255,255,255), ImVec4(255,255,255,0)); (Or appropriate igImageButton call.)

Then, you shall get what I describe in my title: Instead of the actual image, it shows the image of the embedded font in ImGui. If it is a button, you just get a blank white button.

Would you mind fixing this? I have no idea why this could be. Any help would be very much appreciated.

[extrawurst]

What you try to achieve is exactly what i am doing here: https://github.com/Extrawurst/unecht/blob/master/screenshots/2016-02-13%20dragdrop.gif

it is working as u see. i would investigate your drawing code (where textures are bound) and the image format should also match and you should check glError to find out if there is something going wrong

[zeyonaut]

Thanks for the response.

I was skeptical at first that the drawing code was going wrong. However, when I tried to replicate it in C++, the same thing happened! I'm using your ImGui-GLFW implementation file, which was, obviously, a port of the original ImGuiImpl for GLFW3. The texture binding is done in the same way as the font is. I might try editing the implementation file to give ImGui a different texture and check glError.

Edit: You're right, something's wrong with my drawing code. Thanks for the tips.

You have no idea how grateful I am for this. I didn't think of looking in the draw code, but I did not realize I had changed it. Still, thank you so much!

~ Aaron.