[examples] shaders_julia_set doesn't fill screen on Macbook Retina

[a3f]

I am running raylib master with macOS 10.14.4 on a macbook pro retina.

[raysan5]

@a3f is high-dpi support flag enabled?

[a3f]

SUPPORT_HIGH_DPI is defined by default and if I manually undef it, the texture doesn't change size, but moves:

In both cases, the console output is the same:

INFO: Display size: 1680 x 1050
INFO: Render size: 800 x 450
INFO: Screen size: 800 x 450
INFO: Viewport offsets: 0, 0

[raysan5]

@a3f, does it only happen with this example?

GLSL shader julia_set.fs uses the internally OpenGL provided variable gl_FragCoord (unnormalized screen coordinates) instead of provided fragTexCoord, it's the only shader using this... probably related.

[raysan5]

Replaced gl_fragCoord coordinates by provided fragTexCoord (that refer to the full screen texture drawing) on commit 9fd410b

[a3f]

@a3f, does it only happen with this example?

Just ran them and it happens as well with:

• shaders_custom_uniform, shaders_eratosthenes, shaders_postprocessing

The others are unaffected.

Replaced gl_fragCoord coordinates by provided fragTexCoord (that refer to the full screen texture drawing) on commit 9fd410b

Still looks the same:

[raysan5]

ok, I detected the issue, the screenWidth-screenHeight provided to those shaders do not match render size (scaled to HighDPI)

[MikeDX]

As an additional feature to this bug, the following code causes the text to be zoomed 2x

BeginTextureMode(F_renderTarget);
    ClearBackground(colour);

    BeginMode3D(camera);
        DrawModel(F_objects[0].model, Vector3Zero(), 1.0f, WHITE);
        DrawGrid(10, 1.0f);         // Draw a grid
    EndMode3D();
  
    DrawTextEx(F_font, text, (Vector2){cur_x,cur_y},fontSize, 0, F_Ink);
EndTextureMode();

BeginDrawing();
    ClearBackground(BLACK);

    DrawTextureRec(F_framebuffer.texture, (Rectangle){ 0, 0, F_framebuffer.texture.width, -F_framebuffer.texture.height }, (Vector2){ 0,0}, WHITE);
EndDrawing();

however, with the 3d block removed, the text is the correct size

BeginTextureMode(F_renderTarget);
    ClearBackground(colour);

    DrawTextEx(F_font, text, (Vector2){cur_x,cur_y},fontSize, 0, F_Ink);
EndTextureMode();

BeginDrawing();
    ClearBackground(BLACK);

    DrawTextureRec(F_framebuffer.texture, (Rectangle){ 0, 0, F_framebuffer.texture.width, -F_framebuffer.texture.height }, (Vector2){ 0,0}, WHITE);
EndDrawing();

[raysan5]

funding needed: I don't have a Macbook Retina device to work on this issue, if someone could provide one it would be great.

[raysan5]

Closing this issue, moved to a more specific description.

[thevojacek]

Will this ever get fixed? I am using Raylib 3.0.0 and this is exact behavior i get. What helps is to manually move the window, then everything gets rendered correctly.

[raysan5]

@thevojacek actually this issue is related to #1086. It's also macOS dependant. No solution found yet...