mirror of
https://github.com/ZDoom/gzdoom-gles.git
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101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2017 Magnus Norddahl
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// Copyright(C) 2017 Rachael Alexanderson
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// All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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#include <math.h>
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#include "c_dispatch.h"
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#include "c_cvars.h"
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#include "v_video.h"
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#define NUMSCALEMODES 5
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namespace
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{
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struct v_ScaleTable
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{
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bool isValid;
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bool isLinear;
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uint32_t(*GetScaledWidth)(uint32_t Width);
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uint32_t(*GetScaledHeight)(uint32_t Height);
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bool isScaled43;
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};
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v_ScaleTable vScaleTable[NUMSCALEMODES] =
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{
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// isValid, isLinear, GetScaledWidth(), GetScaledHeight(), isScaled43
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{ true, false, [](uint32_t Width)->uint32_t { return Width; }, [](uint32_t Height)->uint32_t { return Height; }, false }, // 0 - Native
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{ true, true, [](uint32_t Width)->uint32_t { return Width; }, [](uint32_t Height)->uint32_t { return Height; }, false }, // 1 - Native (Linear)
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{ true, false, [](uint32_t Width)->uint32_t { return 320; }, [](uint32_t Height)->uint32_t { return 200; }, true }, // 2 - 320x200
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{ true, false, [](uint32_t Width)->uint32_t { return 640; }, [](uint32_t Height)->uint32_t { return 400; }, true }, // 3 - 640x400
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{ true, true, [](uint32_t Width)->uint32_t { return 1280; }, [](uint32_t Height)->uint32_t { return 800; }, true }, // 4 - 1280x800
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};
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bool isOutOfBounds(int x)
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{
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return (x < 0 || x >= NUMSCALEMODES || vScaleTable[x].isValid == false);
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}
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}
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CUSTOM_CVAR(Float, vid_scalefactor, 1.0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
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{
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if (self <= 0.0 || self > 2.0)
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self = 1.0;
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}
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CUSTOM_CVAR(Int, vid_scalemode, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
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{
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if (isOutOfBounds(self))
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self = 0;
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}
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CVAR(Bool, vid_cropaspect, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
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bool ViewportLinearScale()
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{
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if (isOutOfBounds(vid_scalemode))
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vid_scalemode = 0;
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// vid_scalefactor > 1 == forced linear scale
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return (vid_scalefactor > 1.0) ? true : vScaleTable[vid_scalemode].isLinear;
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}
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int ViewportScaledWidth(int width, int height)
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{
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if (isOutOfBounds(vid_scalemode))
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vid_scalemode = 0;
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if (vid_cropaspect && height > 0)
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width = ((float)width/height > ActiveRatio(width, height)) ? (int)(height * ActiveRatio(width, height)) : width;
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return vScaleTable[vid_scalemode].GetScaledWidth((int)((float)width * vid_scalefactor));
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}
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int ViewportScaledHeight(int width, int height)
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{
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if (isOutOfBounds(vid_scalemode))
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vid_scalemode = 0;
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if (vid_cropaspect && height > 0)
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height = ((float)width/height < ActiveRatio(width, height)) ? (int)(width / ActiveRatio(width, height)) : height;
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return vScaleTable[vid_scalemode].GetScaledHeight((int)((float)height * vid_scalefactor));
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}
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bool ViewportIsScaled43()
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{
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if (isOutOfBounds(vid_scalemode))
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vid_scalemode = 0;
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return vScaleTable[vid_scalemode].isScaled43;
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}
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