Redline/source/screen.cpp
maride 02061d74c2 Original 1.0.5 code
(as received from Jonas Echterhoff)
2016-04-02 14:43:55 +02:00

147 lines
3.6 KiB
C++
Executable File

//screen.cpp
//initialize an OpenGL Context
#include <OpenGL/gl.h>
#include <OpenGL/glext.h>
#include <OpenGL/glu.h>
#include <string.h>
#include "fileio.h"
#include "vectors.h"
#include "renderframe.h"
#include "gameframe.h"
#include "config.h"
#include "screen.h"
#include "gamemem.h"
float gFOVY,gFOVX; //field-of-view in the x and y directions
void InitGLContext();
void ReInitGLContext();
void ExitGLContext();
void ScreenGetModes();
tVideoMode gVideoModes[kMaxModes];
int gVideoNumModes=0;
tScreenTexture gScreenTextures[4];
int gScreenTexturesInited=false;
void SetupScreenTextures()
{
for(int i=0;i<4;i++)
{
if(gScreenTexturesInited)
if(gScreenTextures[i].xSize)
glDeleteTextures(1,&gScreenTextures[i].texture);
gScreenTextures[i].xSize=gScreenTextures[i].ySize=0;
gScreenTextures[i].xOffset=gScreenTextures[i].yOffset=0;
glGenTextures(1,&gScreenTextures[i].texture);
glBindTexture(GL_TEXTURE_2D,gScreenTextures[i].texture);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
}
int screenTextureXSize=1;
for(int i=0;i<16;i++)
if(screenTextureXSize<gConfig->screenXSize)
screenTextureXSize*=2;
int screenTextureYSize=1;
for(int i=0;i<16;i++)
if(screenTextureYSize<gConfig->screenYSize)
screenTextureYSize*=2;
if(screenTextureXSize>1024)
if(screenTextureYSize>1024)
{
gScreenTextures[0].xSize=1024;
gScreenTextures[0].ySize=1024;
screenTextureXSize=1;
for(int i=0;i<16;i++)
if(screenTextureXSize<gConfig->screenXSize-1024)
screenTextureXSize*=2;
gScreenTextures[1].xSize=screenTextureXSize;
gScreenTextures[1].ySize=1024;
gScreenTextures[1].xOffset=1024;
screenTextureYSize=1;
for(int i=0;i<16;i++)
if(screenTextureYSize<gConfig->screenYSize-1024)
screenTextureYSize*=2;
gScreenTextures[2].xSize=1024;
gScreenTextures[2].ySize=screenTextureYSize;
gScreenTextures[2].yOffset=1024;
gScreenTextures[3].xSize=screenTextureXSize;
gScreenTextures[3].ySize=screenTextureYSize;
gScreenTextures[3].xOffset=1024;
gScreenTextures[3].yOffset=1024;
}
else
{
gScreenTextures[0].xSize=1024;
gScreenTextures[0].ySize=screenTextureYSize;
screenTextureXSize=1;
for(int i=0;i<16;i++)
if(screenTextureXSize<gConfig->screenXSize-1024)
screenTextureXSize*=2;
gScreenTextures[1].xSize=screenTextureXSize;
gScreenTextures[1].ySize=screenTextureYSize;
gScreenTextures[1].xOffset=1024;
}
else
{
gScreenTextures[0].xSize=screenTextureXSize;
gScreenTextures[0].ySize=screenTextureYSize;
}
gScreenTexturesInited=true;
}
void SetupAspect(float fovy)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity(); // Reset The Projection Matrix
float aspect=(float)gConfig->screenXSize/(float)gConfig->screenYSize;
gFOVY=fovy;
gFOVX=aspect*gFOVY;
gluPerspective(gFOVY*(360.0/(2*PI)),aspect,0.1f,ClipDistance()); // Calculate The Aspect Ratio Of The Window
glMatrixMode(GL_MODELVIEW);
}
void InitGL()
{
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_CULL_FACE);
glEnable(GL_FOG);
glEnable(GL_TEXTURE_2D);
float fogColor[4]={1,1,1,1};
glFogi(GL_FOG_MODE,GL_LINEAR);
glFogf(GL_FOG_START,600);
glFogf(GL_FOG_END,800);
glFogfv(GL_FOG_COLOR,fogColor);
if(gConfig->fsaa)
glEnable(GL_MULTISAMPLE_ARB);
if(!ScreenSupportsAnisotropicFiltering()&&gConfig->textureFilter==2)
gConfig->textureFilter=1;
SetupScreenTextures();
}
void ScreenInit()
{
ScreenGetModes();
InitGLContext();
InitGL();
SetupAspect(kNormalFOVY);
}
void ScreenReInit()
{
ScreenExit();
ScreenInit();
}