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REVIEWED: HiggDPI content scaling on changing monitors with different DPI #5335 #5356

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Note that high-dpi awareness must be enabled by users and `CORE.Window.render` reports the scaled framebuffer size, while `CORE.Window.screen` reports the logical size.

`ToggleBorderlessWindow()` has also been reviewed to be consistent with scaling, if monitor physical display size is reported as 1920x1080 but there is a content scale of 1.5, then the borderless fullscreen window will be 1280x720, with the 1920x1080 framebuffer
This commit is contained in:
Ray
2025-12-17 19:20:18 +01:00
parent 7553e9d586
commit 6d562e5e87
3 changed files with 120 additions and 70 deletions
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33
examples/core/core_highdpi_testbed.c
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@@ -30,6 +30,10 @@ int main(void)
SetConfigFlags(FLAG_WINDOW_HIGHDPI | FLAG_WINDOW_RESIZABLE);
InitWindow(screenWidth, screenHeight, "raylib [core] example - highdpi testbed");
Vector2 scaleDpi = GetWindowScaleDPI();
Vector2 mousePos = GetMousePosition();
int currentMonitor = GetCurrentMonitor();
int gridSpacing = 40; // Grid spacing in pixels
SetTargetFPS(60);
@@ -40,7 +44,9 @@ int main(void)
{
// Update
//----------------------------------------------------------------------------------
// TODO: Update variables / Implement example logic at this point
mousePos = GetMousePosition();
currentMonitor = GetCurrentMonitor();
scaleDpi = GetWindowScaleDPI();
//----------------------------------------------------------------------------------
// Draw
@@ -50,11 +56,30 @@ int main(void)
ClearBackground(RAYWHITE);
// Draw grid
for (int h = 0; h < 20; h++) DrawLine(0, h*gridSpacing, GetRenderWidth(), h*gridSpacing, LIGHTGRAY);
for (int v = 0; v < 40; v++) DrawLine(v*gridSpacing, 0, v*gridSpacing, GetScreenHeight(), LIGHTGRAY);
for (int h = 0; h < 20; h++)
{
DrawText(TextFormat("%02i", h*gridSpacing), 4, h*gridSpacing - 4, 10, GRAY);
DrawLine(24, h*gridSpacing, GetScreenWidth(), h*gridSpacing, LIGHTGRAY);
}
for (int v = 0; v < 40; v++)
{
DrawText(TextFormat("%02i", v*gridSpacing), v*gridSpacing - 10, 4, 10, GRAY);
DrawLine(v*gridSpacing, 20, v*gridSpacing, GetScreenHeight(), LIGHTGRAY);
}
// Draw UI info
DrawText(TextFormat("SCREEN SIZE: %ix%i", GetScreenWidth(), GetScreenHeight()), 10, 10, 20, BLACK);
DrawText(TextFormat("CURRENT MONITOR: %i/%i (%ix%i)", currentMonitor + 1, GetMonitorCount(),
GetMonitorWidth(currentMonitor), GetMonitorHeight(currentMonitor)), 50, 50, 20, DARKGRAY);
DrawText(TextFormat("SCREEN SIZE: %ix%i", GetScreenWidth(), GetScreenHeight()), 50, 90, 20, DARKGRAY);
DrawText(TextFormat("RENDER SIZE: %ix%i", GetRenderWidth(), GetRenderHeight()), 50, 130, 20, DARKGRAY);
DrawText(TextFormat("SCALE FACTOR: %.1fx%.1f", scaleDpi.x, scaleDpi.y), 50, 170, 20, GRAY);
// Draw mouse position
DrawCircleV(GetMousePosition(), 20, MAROON);
DrawRectangle(mousePos.x - 25, mousePos.y, 50, 2, BLACK);
DrawRectangle(mousePos.x, mousePos.y - 25, 2, 50, BLACK);
DrawText(TextFormat("[%i,%i]", GetMouseX(), GetMouseY()), mousePos.x - 44,
(mousePos.y > GetScreenHeight() - 60)? mousePos.y - 46 : mousePos.y + 30, 20, BLACK);
EndDrawing();
//----------------------------------------------------------------------------------