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#include <string>
#include <iostream>
#include <windows.h>
#include <shellapi.h>
#include <GL/glew.h>
#include <time.h>
#include "SOIL.h"
LRESULT CALLBACK WindowProc(HWND, UINT, WPARAM, LPARAM);
void EnableOpenGL(HWND hwnd, HDC*, HGLRC*);
void DisableOpenGL(HWND, HDC, HGLRC);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
WNDCLASSEX wcex;
HWND hwnd;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL bQuit = FALSE;
float theta = 0.0f;
// register window class
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_OWNDC;
wcex.lpfnWndProc = WindowProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "GLSample";
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if (!RegisterClassEx(&wcex))
return 0;
// create main window
hwnd = CreateWindowEx(0,
"GLSample",
"SOIL Sample",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
512,
512,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd, nCmdShow);
// check my error handling
/*
SOIL_load_OGL_texture( "img_test.png", SOIL_LOAD_AUTO, SOIL_CREATE_NEW_ID, 0 );
std::cout << "'" << SOIL_last_result() << "'" << std::endl;
*/
// enable OpenGL for the window
EnableOpenGL(hwnd, &hDC, &hRC);
glEnable( GL_BLEND );
//glDisable( GL_BLEND );
// straight alpha
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
// premultiplied alpha (remember to do the same in glColor!!)
//glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA );
// do I want alpha thresholding?
glEnable( GL_ALPHA_TEST );
glAlphaFunc( GL_GREATER, 0.5f );
// log what the use is asking us to load
std::string load_me = lpCmdLine;
if( load_me.length() > 2 )
{
//load_me = load_me.substr( 1, load_me.length() - 2 );
load_me = load_me.substr( 0, load_me.length() - 0 );
} else
{
//load_me = "img_test_uncompressed.dds";
//load_me = "img_test_indexed.tga";
//load_me = "img_test.dds";
load_me = "img_test.png";
//load_me = "odd_size.jpg";
//load_me = "img_cheryl.jpg";
//load_me = "oak_odd.png";
//load_me = "field_128_cube.dds";
//load_me = "field_128_cube_nomip.dds";
//load_me = "field_128_cube_uc.dds";
//load_me = "field_128_cube_uc_nomip.dds";
//load_me = "Goblin.dds";
//load_me = "parquet.dds";
//load_me = "stpeters_probe.hdr";
//load_me = "VeraMoBI_sdf.png";
// for testing the texture rectangle code
//load_me = "test_rect.png";
}
std::cout << "'" << load_me << "'" << std::endl;
// 1st try to load it as a single-image-cubemap
// (note, need DDS ordered faces: "EWUDNS")
GLuint tex_ID;
int time_me;
std::cout << "Attempting to load as a cubemap" << std::endl;
time_me = clock();
tex_ID = SOIL_load_OGL_single_cubemap(
load_me.c_str(),
SOIL_DDS_CUBEMAP_FACE_ORDER,
SOIL_LOAD_AUTO,
SOIL_CREATE_NEW_ID,
SOIL_FLAG_POWER_OF_TWO
| SOIL_FLAG_MIPMAPS
//| SOIL_FLAG_COMPRESS_TO_DXT
//| SOIL_FLAG_TEXTURE_REPEATS
//| SOIL_FLAG_INVERT_Y
| SOIL_FLAG_DDS_LOAD_DIRECT
);
time_me = clock() - time_me;
std::cout << "the load time was " << 0.001f * time_me << " seconds (warning: low resolution timer)" << std::endl;
if( tex_ID > 0 )
{
glEnable( GL_TEXTURE_CUBE_MAP );
glEnable( GL_TEXTURE_GEN_S );
glEnable( GL_TEXTURE_GEN_T );
glEnable( GL_TEXTURE_GEN_R );
glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP );
glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP );
glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP );
glBindTexture( GL_TEXTURE_CUBE_MAP, tex_ID );
// report
std::cout << "the loaded single cube map ID was " << tex_ID << std::endl;
//std::cout << "the load time was " << 0.001f * time_me << " seconds (warning: low resolution timer)" << std::endl;
} else
{
std::cout << "Attempting to load as a HDR texture" << std::endl;
time_me = clock();
tex_ID = SOIL_load_OGL_HDR_texture(
load_me.c_str(),
//SOIL_HDR_RGBE,
//SOIL_HDR_RGBdivA,
SOIL_HDR_RGBdivA2,
0,
SOIL_CREATE_NEW_ID,
SOIL_FLAG_POWER_OF_TWO
| SOIL_FLAG_MIPMAPS
//| SOIL_FLAG_COMPRESS_TO_DXT
);
time_me = clock() - time_me;
std::cout << "the load time was " << 0.001f * time_me << " seconds (warning: low resolution timer)" << std::endl;
// did I fail?
if( tex_ID < 1 )
{
// loading of the single-image-cubemap failed, try it as a simple texture
std::cout << "Attempting to load as a simple 2D texture" << std::endl;
// load the texture, if specified
time_me = clock();
tex_ID = SOIL_load_OGL_texture(
load_me.c_str(),
SOIL_LOAD_AUTO,
SOIL_CREATE_NEW_ID,
SOIL_FLAG_POWER_OF_TWO
| SOIL_FLAG_MIPMAPS
//| SOIL_FLAG_MULTIPLY_ALPHA
//| SOIL_FLAG_COMPRESS_TO_DXT
| SOIL_FLAG_DDS_LOAD_DIRECT
//| SOIL_FLAG_NTSC_SAFE_RGB
//| SOIL_FLAG_CoCg_Y
//| SOIL_FLAG_TEXTURE_RECTANGLE
);
time_me = clock() - time_me;
std::cout << "the load time was " << 0.001f * time_me << " seconds (warning: low resolution timer)" << std::endl;
}
if( tex_ID > 0 )
{
// enable texturing
glEnable( GL_TEXTURE_2D );
//glEnable( 0x84F5 );// enables texture rectangle
// bind an OpenGL texture ID
glBindTexture( GL_TEXTURE_2D, tex_ID );
// report
std::cout << "the loaded texture ID was " << tex_ID << std::endl;
//std::cout << "the load time was " << 0.001f * time_me << " seconds (warning: low resolution timer)" << std::endl;
} else
{
// loading of the texture failed...why?
glDisable( GL_TEXTURE_2D );
std::cout << "Texture loading failed: '" << SOIL_last_result() << "'" << std::endl;
}
}
// program main loop
const float ref_mag = 0.1f;
while (!bQuit)
{
// check for messages
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
// handle or dispatch messages
if (msg.message == WM_QUIT)
{
bQuit = TRUE;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
// OpenGL animation code goes here
theta = clock() * 0.1f;
float tex_u_max = 1.0f;//0.2f;
float tex_v_max = 1.0f;//0.2f;
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glScalef( 0.8f, 0.8f, 0.8f );
//glRotatef(-0.314159f*theta, 0.0f, 0.0f, 1.0f);
glColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
glNormal3f( 0.0f, 0.0f, 1.0f );
glBegin(GL_QUADS);
glNormal3f( -ref_mag, -ref_mag, 1.0f );
glTexCoord2f( 0.0f, tex_v_max );
glVertex3f( -1.0f, -1.0f, -0.1f );
glNormal3f( ref_mag, -ref_mag, 1.0f );
glTexCoord2f( tex_u_max, tex_v_max );
glVertex3f( 1.0f, -1.0f, -0.1f );
glNormal3f( ref_mag, ref_mag, 1.0f );
glTexCoord2f( tex_u_max, 0.0f );
glVertex3f( 1.0f, 1.0f, -0.1f );
glNormal3f( -ref_mag, ref_mag, 1.0f );
glTexCoord2f( 0.0f, 0.0f );
glVertex3f( -1.0f, 1.0f, -0.1f );
glEnd();
glPopMatrix();
tex_u_max = 1.0f;
tex_v_max = 1.0f;
glPushMatrix();
glScalef( 0.8f, 0.8f, 0.8f );
glRotatef(theta, 0.0f, 0.0f, 1.0f);
glColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
glNormal3f( 0.0f, 0.0f, 1.0f );
glBegin(GL_QUADS);
glTexCoord2f( 0.0f, tex_v_max ); glVertex3f( 0.0f, 0.0f, 0.1f );
glTexCoord2f( tex_u_max, tex_v_max ); glVertex3f( 1.0f, 0.0f, 0.1f );
glTexCoord2f( tex_u_max, 0.0f ); glVertex3f( 1.0f, 1.0f, 0.1f );
glTexCoord2f( 0.0f, 0.0f ); glVertex3f( 0.0f, 1.0f, 0.1f );
glEnd();
glPopMatrix();
{
/* check for errors */
GLenum err_code = glGetError();
while( GL_NO_ERROR != err_code )
{
printf( "OpenGL Error @ %s: %i", "drawing loop", err_code );
err_code = glGetError();
}
}
SwapBuffers(hDC);
Sleep (1);
}
}
// and show off the screenshot capability
/*
load_me += "-screenshot.tga";
SOIL_save_screenshot( load_me.c_str(), SOIL_SAVE_TYPE_TGA, 0, 0, 512, 512 );
//*/
//*
load_me += "-screenshot.bmp";
SOIL_save_screenshot( load_me.c_str(), SOIL_SAVE_TYPE_BMP, 0, 0, 512, 512 );
//*/
/*
load_me += "-screenshot.dds";
SOIL_save_screenshot( load_me.c_str(), SOIL_SAVE_TYPE_DDS, 0, 0, 512, 512 );
//*/
// shutdown OpenGL
DisableOpenGL(hwnd, hDC, hRC);
// destroy the window explicitly
DestroyWindow(hwnd);
return static_cast<int>(msg.wParam);
}
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_CLOSE:
PostQuitMessage(0);
break;
case WM_DESTROY:
return 0;
case WM_KEYDOWN:
{
switch (wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
break;
}
}
break;
default:
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
return 0;
}
void EnableOpenGL(HWND hwnd, HDC* hDC, HGLRC* hRC)
{
PIXELFORMATDESCRIPTOR pfd;
int iFormat;
/* get the device context (DC) */
*hDC = GetDC(hwnd);
/* set the pixel format for the DC */
ZeroMemory(&pfd, sizeof(pfd));
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
iFormat = ChoosePixelFormat(*hDC, &pfd);
SetPixelFormat(*hDC, iFormat, &pfd);
/* create and enable the render context (RC) */
*hRC = wglCreateContext(*hDC);
wglMakeCurrent(*hDC, *hRC);
}
void DisableOpenGL (HWND hwnd, HDC hDC, HGLRC hRC)
{
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hRC);
ReleaseDC(hwnd, hDC);
}