int main()
{
SDL_Window *window = NULL;
int width = 480, height = 480;
int flags;
int quit = 0;
// Initialize SDL, then get the current video mode and use it to create a SDL window.
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
fprintf(stderr, "Video initialization failed: %s\n", SDL_GetError());
SDL_Quit();
exit(1);
}
// Request GL context to be OpenGL 3.2 Core Profile
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
// Other GL attributes
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
//SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
window = SDL_CreateWindow("AntTweakBar example using OpenGL Core Profile and SDL",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
width, height,
flags);
if (window == NULL)
{
fprintf(stderr, "Video mode set failed: %s\n", SDL_GetError());
SDL_Quit();
exit(1);
}
// Initialize AntTweakBar
if (!TwInit(TW_OPENGL_CORE, NULL)) {
fprintf(stderr, "AntTweakBar initialization failed: %s\n", TwGetLastError());
SDL_Quit();
exit(1);
}
// Tell the window size to AntTweakBar
TwWindowSize(width, height);
// Create a tweak bar
CreateTweakBar();
// Set OpenGL viewport
glViewport(0, 0, width, height);
// Prepare GL shaders and programs for drawing
InitRender();
// Main loop:
// - Draw scene
// - Process events
while (!quit)
{
SDL_Event event;
int handled;
GLenum error;
// Clear screen
glClearColor(0.5f, 0.75f, 0.8f, 1);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// Update angle and draw geometry
angle = (float)SDL_GetTicks()/25.0f * (FLOAT_PI/180.0f);
quat[0] = quat[1] = 0;
quat[2] = (float)sin(angle/2.0f);
quat[3] = (float)cos(angle/2.0f);
Render();
// Draw tweak bars
TwDraw();
// Present frame buffer
SDL_GL_SwapWindow(window);
// Process incoming events
while (SDL_PollEvent(&event))
{
// Send event to AntTweakBar
handled = TwEventSDL(&event);
// If event has not been handled by AntTweakBar, process it
if (!handled)
{
switch (event.type)
{
case SDL_QUIT: // Window is closed
quit = 1;
break;
case SDL_WINDOWEVENT: // Window size has changed
// Resize SDL video mode
if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
width = event.window.data1;
height = event.window.data2;
// Resize OpenGL viewport
glViewport(0, 0, width, height);
// Restore OpenGL states
InitRender();
// TwWindowSize has been called by TwEventSDL,
// so it is not necessary to call it again here.
}
break;
}
}
}
while ((error = glGetError()) != GL_NO_ERROR)
fprintf(stderr, "GL error detected: 0x%04X\n", error);
} // End of main loop
// Terminate AntTweakBar
TwTerminate();
// Delete GL shaders and buffer
UninitRender();
// Terminate SDL
SDL_Quit();
return 0;
}
int main()
{
const SDL_VideoInfo* video = NULL;
int width = 480, height = 480;
int bpp, flags;
int quit = 0;
// Initialize SDL, then get the current video mode and use it to create a SDL window.
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
fprintf(stderr, "Video initialization failed: %s\n", SDL_GetError());
SDL_Quit();
exit(1);
}
video = SDL_GetVideoInfo();
if (!video)
{
fprintf(stderr, "Video query failed: %s\n", SDL_GetError());
SDL_Quit();
exit(1);
}
// Request GL context to be OpenGL 3.2 Core Profile
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
// Other GL attributes
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
//SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
bpp = video->vfmt->BitsPerPixel;
flags = SDL_OPENGL | SDL_HWSURFACE;
if (!SDL_SetVideoMode(width, height, bpp, flags))
{
fprintf(stderr, "Video mode set failed: %s\n", SDL_GetError());
SDL_Quit();
exit(1);
}
SDL_WM_SetCaption("AntTweakBar example using OpenGL Core Profile and SDL", "AntTweakBar+GLCore+SDL");
// Enable SDL unicode and key-repeat
SDL_EnableUNICODE(1);
SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
// Load some OpenGL core functions
if (!LoadGLCoreFunctions())
{
fprintf(stderr, "OpenGL 3.2 not supported.\n");
SDL_Quit();
exit(1);
}
// Initialize AntTweakBar
if (!TwInit(TW_OPENGL_CORE, NULL)) {
fprintf(stderr, "AntTweakBar initialization failed: %s\n", TwGetLastError());
SDL_Quit();
exit(1);
}
// Tell the window size to AntTweakBar
TwWindowSize(width, height);
// Create a tweak bar
CreateTweakBar();
// Set OpenGL viewport
glViewport(0, 0, width, height);
// Prepare GL shaders and programs for drawing
InitRender();
// Main loop:
// - Draw scene
// - Process events
while (!quit)
{
SDL_Event event;
int handled;
GLenum error;
// Clear screen
glClearColor(0.5f, 0.75f, 0.8f, 1);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// Update angle and draw geometry
angle = (float)SDL_GetTicks()/25.0f * (FLOAT_PI/180.0f);
quat[0] = quat[1] = 0;
quat[2] = (float)sin(angle/2.0f);
quat[3] = (float)cos(angle/2.0f);
Render();
// Draw tweak bars
TwDraw();
// Present frame buffer
SDL_GL_SwapBuffers();
// Process incoming events
while (SDL_PollEvent(&event))
{
// Send event to AntTweakBar
handled = TwEventSDL(&event, SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
// If event has not been handled by AntTweakBar, process it
if (!handled)
{
switch (event.type)
{
case SDL_QUIT: // Window is closed
quit = 1;
break;
case SDL_VIDEORESIZE: // Window size has changed
// Resize SDL video mode
width = event.resize.w;
height = event.resize.h;
if (!SDL_SetVideoMode(width, height, bpp, flags))
fprintf(stderr, "WARNING: Video mode set failed: %s\n", SDL_GetError());
// Resize OpenGL viewport
glViewport(0, 0, width, height);
// Restore OpenGL states
InitRender();
// TwWindowSize has been called by TwEventSDL,
// so it is not necessary to call it again here.
break;
}
}
}
while ((error = glGetError()) != GL_NO_ERROR)
fprintf(stderr, "GL error detected: 0x%04X\n", error);
} // End of main loop
// Terminate AntTweakBar
TwTerminate();
// Delete GL shaders and buffer
UninitRender();
// Terminate SDL
SDL_Quit();
return 0;
}
