gzdoom/src/r_videoscale.cpp
alexey.lysiuk a936592cfd - fixed compilation warning reported by MSVC
src\r_videoscale.cpp(105): warning C4244: 'initializing': conversion from 'float' to 'int', possible loss of data
2018-05-25 10:59:48 +03:00

145 lines
4.4 KiB
C++

//
//---------------------------------------------------------------------------
//
// Copyright(C) 2017 Magnus Norddahl
// Copyright(C) 2017 Rachael Alexanderson
// All rights reserved.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see http://www.gnu.org/licenses/
//
//--------------------------------------------------------------------------
//
#include <math.h>
#include "c_dispatch.h"
#include "c_cvars.h"
#include "v_video.h"
#define NUMSCALEMODES 5
namespace
{
struct v_ScaleTable
{
bool isValid;
bool isLinear;
uint32_t(*GetScaledWidth)(uint32_t Width);
uint32_t(*GetScaledHeight)(uint32_t Height);
bool isScaled43;
};
v_ScaleTable vScaleTable[NUMSCALEMODES] =
{
// isValid, isLinear, GetScaledWidth(), GetScaledHeight(), isScaled43
{ true, false, [](uint32_t Width)->uint32_t { return Width; }, [](uint32_t Height)->uint32_t { return Height; }, false }, // 0 - Native
{ true, true, [](uint32_t Width)->uint32_t { return Width; }, [](uint32_t Height)->uint32_t { return Height; }, false }, // 1 - Native (Linear)
{ true, false, [](uint32_t Width)->uint32_t { return 320; }, [](uint32_t Height)->uint32_t { return 200; }, true }, // 2 - 320x200
{ true, false, [](uint32_t Width)->uint32_t { return 640; }, [](uint32_t Height)->uint32_t { return 400; }, true }, // 3 - 640x400
{ true, true, [](uint32_t Width)->uint32_t { return 1280; }, [](uint32_t Height)->uint32_t { return 800; }, true }, // 4 - 1280x800
};
bool isOutOfBounds(int x)
{
return (x < 0 || x >= NUMSCALEMODES || vScaleTable[x].isValid == false);
}
}
CUSTOM_CVAR(Float, vid_scalefactor, 1.0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
if (self < 0.05 || self > 2.0)
self = 1.0;
}
CUSTOM_CVAR(Int, vid_scalemode, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
if (isOutOfBounds(self))
self = 0;
}
CVAR(Bool, vid_cropaspect, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
bool ViewportLinearScale()
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
// vid_scalefactor > 1 == forced linear scale
return (vid_scalefactor > 1.0) ? true : vScaleTable[vid_scalemode].isLinear;
}
int ViewportScaledWidth(int width, int height)
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
if (vid_cropaspect && height > 0)
width = ((float)width/height > ActiveRatio(width, height)) ? (int)(height * ActiveRatio(width, height)) : width;
return vScaleTable[vid_scalemode].GetScaledWidth((int)((float)width * vid_scalefactor));
}
int ViewportScaledHeight(int width, int height)
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
if (vid_cropaspect && height > 0)
height = ((float)width/height < ActiveRatio(width, height)) ? (int)(width / ActiveRatio(width, height)) : height;
return vScaleTable[vid_scalemode].GetScaledHeight((int)((float)height * vid_scalefactor));
}
bool ViewportIsScaled43()
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
return vScaleTable[vid_scalemode].isScaled43;
}
void R_ShowCurrentScaling()
{
int x1 = screen->GetClientWidth(), y1 = screen->GetClientHeight(), x2 = int(x1 * vid_scalefactor), y2 = int(y1 * vid_scalefactor);
Printf("Current Scale: %f\n", (float)(vid_scalefactor));
Printf("Real resolution: %i x %i\nEmulated resolution: %i x %i\n", x1, y1, x2, y2);
}
bool R_CalcsShouldBeBlocked()
{
if (vid_scalemode < 0 || vid_scalemode > 1)
{
Printf("vid_scalemode should be 0 or 1 before using this command.\n");
return true;
}
return false;
}
CCMD (vid_showcurrentscaling)
{
R_ShowCurrentScaling();
}
CCMD (vid_scaletowidth)
{
if (R_CalcsShouldBeBlocked())
return;
if (argv.argc() > 1)
vid_scalefactor = (float)((double)atof(argv[1]) / screen->GetClientWidth());
R_ShowCurrentScaling();
}
CCMD (vid_scaletoheight)
{
if (R_CalcsShouldBeBlocked())
return;
if (argv.argc() > 1)
vid_scalefactor = (float)((double)atof(argv[1]) / screen->GetClientHeight());
R_ShowCurrentScaling();
}