//Set up variables
bool DemoInit()
{
if(!window.Init("Render To Texture", 640, 480, 32, 24, 8, WINDOWED_SCREEN))
return 0; //quit if not created
camera.Init(VECTOR3D(0.0f, 0.0f, -2.5f), 2.0f, 100.0f);
//Set up extensions
if( !SetUpWGL_ARB_extensions_string())
return false;
SetUpEXT_texture_filter_anisotropic();
SetUpSGIS_generate_mipmap();
//Get the WGL extensions string
const char * wglExtensions;
wglExtensions=wglGetExtensionsStringARB(window.hDC);
//Set up wgl extensions
if( !SetUpWGL_ARB_pbuffer(wglExtensions) || !SetUpWGL_ARB_pixel_format(wglExtensions) ||
!SetUpWGL_ARB_render_texture(wglExtensions))
return false;
//Init the pbuffer
int pbufferExtraIAttribs[]={WGL_BIND_TO_TEXTURE_RGBA_ARB, true,
0};
int pbufferFlags[]={WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB,
//request mipmap space if mipmaps are to be used
SGIS_generate_mipmap_supported ? WGL_MIPMAP_TEXTURE_ARB : 0,
SGIS_generate_mipmap_supported ? true : 0,
0};
if(!pbuffer.Init(pbufferSize, pbufferSize, 32, 24, 8, 1, pbufferExtraIAttribs, pbufferFlags))
return false;
//Create the texture object to relate to the pbuffer
glGenTextures(1, &pbufferTexture);
glBindTexture(GL_TEXTURE_2D, pbufferTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Use generated mipmaps if supported
if(SGIS_generate_mipmap_supported)
{
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, true);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
useMipmapFilter=true;
}
//Use maximum anisotropy if supported
if(EXT_texture_filter_anisotropic_supported)
{
glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxAnisotropy);
currentAnisotropy=maxAnisotropy;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, currentAnisotropy);
}
//Load the decal texture
//Note: This MUST be done when the pbuffer is the current context
pbuffer.MakeCurrent();
IMAGE decalImage;
decalImage.Load("decal.bmp");
glGenTextures(1, &decalTexture);
glBindTexture(GL_TEXTURE_2D, decalTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, decalImage.width, decalImage.height,
0, decalImage.format, GL_UNSIGNED_BYTE, decalImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//reset timer for start
timer.Reset();
return true;
}
bool WINDOW::Init( char * windowTitle, int newWidth, int newHeight,
int newRedBits, int newGreenBits, int newBlueBits, int newAlphaBits,
int newDepthBits, int newStencilBits,
bool newFullscreen, bool newVSync, bool dialogBox)
{
//Set member variables
title=windowTitle;
width=newWidth;
height=newHeight;
redBits=newRedBits;
greenBits=newGreenBits;
blueBits=newBlueBits;
alphaBits=newAlphaBits;
depthBits=newDepthBits;
stencilBits=newStencilBits;
fullscreen=newFullscreen;
vSync=newVSync;
LOG::Instance()->OutputSuccess("Creating temporary window");
LOG::Instance()->OutputNewLine();
//Init dummy window to get extension pointers
if(!InitDummy())
return false;
LOG::Instance()->OutputNewLine();
bool revertToStandard=false;
//Initiate the WGL extensions. If not supported, use the standard window
if( !SetUpWGL_ARB_extensions_string())
revertToStandard=true;
//If ARB_extensions_string is supported,
if(!revertToStandard)
{
//Get the WGL extensions string
const char * wglExtensions;
wglExtensions=wglGetExtensionsStringARB(hDC);
//If the necessary extensions are not supported, use the standard window
if( !SetUpWGL_ARB_pixel_format(wglExtensions) ||
!SetUpWGL_EXT_swap_control(wglExtensions))
revertToStandard=true;
//Also initialise ARB_multisample
SetUpWGL_ARB_multisample(wglExtensions);
}
//If we need to revert to standard, shut down the dummy window, Create standard window
//and return
if(revertToStandard)
{
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputSuccess("Destroying temporary window");
ShutdownDummy();
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputSuccess("Replacing with standard, non WGL_extension window");
LOG::Instance()->OutputNewLine();
InitStandard();
return true;
}
//If we have reached here, the ARB extensions are supported.
//Shutdown this window and create a window using ARB_pixel_format etc
//Find supported AA samples with given color bits, if ARB_multisample is supported
for(int i=0; i<17; ++i)
samplesSupported[i]=false;
if(WGL_ARB_multisample_supported)
{
FindSamplesSupported();
}
else
{
samplesSupported[0]=true;
}
//Destroy temporary window
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputSuccess("Destroying temporary window");
ShutdownDummy();
//Creat WGL extension window
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputSuccess("Replacing with WGL_extension window");
LOG::Instance()->OutputNewLine();
if(InitExtended(dialogBox))
return true;
//If we reached here, InitExtended failed.
//Try a standard window as a last resort
//Destroy extended window
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputSuccess("Extended window creation failed - Destroying");
ShutdownDummy(); //Use ShutdownDummy as we have not hidden the cursor yet.
//So, we do not want the call to show it
//Create standard window
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputSuccess("Replacing with standard window");
LOG::Instance()->OutputNewLine();
if(InitStandard())
return true;
//All window creation attempts failed
LOG::Instance()->OutputNewLine();
LOG::Instance()->OutputError("All window Creation attempts failed!");
Shutdown();
return false;
}
