33 lines
1.5 KiB
Markdown
33 lines
1.5 KiB
Markdown
<!--
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Copyright (C) 2026 SharpEmu Emulator Project
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SPDX-License-Identifier: GPL-2.0-or-later
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-->
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# Rendering resolution
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Options → Rendering exposes two independent sizes, globally and per game:
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- **Resolution** sets the host window size or exclusive fullscreen mode.
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- **Game display mode** reports a 1080p display to the game by default. Select
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3840×2160 to request a 4K display. A registered presentation buffer cannot
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change this setting.
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The CLI equivalents are `--resolution=1280x720` and
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`--guest-resolution=1920x1080` (or `3840x2160`). For example, a 1080p game display
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can be presented in a 720p window; changing the window alone does not reduce the
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work the game renders.
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The game chooses its internal render targets. Some games adapt those targets to
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the reported display mode; others render at a fixed resolution and may still
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register 4K buffers with a 1080p display. Silent Hill: The Short Message does so
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in current testing. The size of that presentation buffer alone also does not
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establish the sizes of its intermediate scene targets.
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Arbitrary internal resolution scaling is not implemented. The previous
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`RenderResolutionScale` setting and its `SHARPEMU_RENDER_SCALE` export had no
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renderer consumer; they have been removed. They did not change rendering work.
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A correct implementation must preserve guest memory layouts while scaling host
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attachments, viewports, scissors, image fetches, compute accesses, aliases and
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readbacks consistently. Reducing only the output image or window is not an
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internal-resolution implementation.
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