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Take widescreen hack into account when determining automatic resolution scale

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At widescreen aspect ratios, a greater resolution scale factor is required
to maintain crisp visuals. For instance, a 16:9 output requires ~1.333×
the resolution scale of a 4:3 output (as 16:9 is ~1.333× wider than 4:3).

This improves visuals at widescreen aspect ratios when the widescreen hack
is enabled, especially for ultrawide.
This commit is contained in:
Hugo Locurcio 2024-01-21 23:50:08 +01:00 committed by Stenzek
parent 5e2c6d24b9
commit 1b8e75e90b
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1 changed files with 10 additions and 1 deletions
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11
src/core/gpu_hw.cpp
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@ -525,8 +525,17 @@ u32 GPU_HW::CalculateResolutionScale() const
static_cast<s32>(m_crtc_state.display_height) :
(m_console_is_pal ? (PAL_VERTICAL_ACTIVE_END - PAL_VERTICAL_ACTIVE_START) :
(NTSC_VERTICAL_ACTIVE_END - NTSC_VERTICAL_ACTIVE_START));
float widescreen_multiplier = 1.0f;
if (g_settings.gpu_widescreen_hack) {
// Multiply scale factor by aspect ratio relative to 4:3, so that widescreen resolution is as close as possible to native screen resolution.
// Otherwise, anamorphic stretching would result in increasingly less horizontal resolution (relative to native screen resolution)
// as the aspect ratio gets wider.
widescreen_multiplier = std::max(1.0, (float(g_gpu_device->GetWindowWidth()) / g_gpu_device->GetWindowHeight()) / (4.0 / 3.0));
}
const s32 preferred_scale =
static_cast<s32>(std::ceil(static_cast<float>(g_gpu_device->GetWindowHeight()) / height));
static_cast<s32>(std::ceil(static_cast<float>(g_gpu_device->GetWindowHeight() * widescreen_multiplier) / height));
Log_VerboseFmt("Height = {}, preferred scale = {}", height, preferred_scale);
scale = static_cast<u32>(std::clamp<s32>(preferred_scale, 1, max_resolution_scale));