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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<pre class="sourcecodebox">/*
* main.c
* aglClipBufferRectTest
*
* Created by ggs on Thurs May 24 2002.
Copyright: Copyright © 2002 Apple Computer, Inc., All Rights Reserved
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under Apple's
copyrights in this original Apple software (the "Apple Software"), to use,
reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
this notice and the following text and disclaimers in all such redistributions of
the Apple Software. Neither the name, trademarks, service marks or logos of
Apple Computer, Inc. may be used to endorse or promote products derived from the
Apple Software without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or implied,
are granted by Apple herein, including but not limited to any patent rights that
may be infringed by your derivative works or by other works in which the Apple
Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifdef __MACH__
#include <Carbon/Carbon.h>
#include <AGL/agl.h>
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#else
#include <CarbonEvents.h>
#include <Controls.h>
#include <string.h>
#endif
// ---------------------------------
GLint cube_num_vertices = 8;
GLfloat cube_vertices [8][3] = {
{1.0, 1.0, 1.0}, {1.0, -1.0, 1.0}, {-1.0, -1.0, 1.0}, {-1.0, 1.0, 1.0},
{1.0, 1.0, -1.0}, {1.0, -1.0, -1.0}, {-1.0, -1.0, -1.0}, {-1.0, 1.0, -1.0} };
GLint num_faces = 6;
short cube_faces [6][4] = {
{3, 2, 1, 0}, {2, 3, 7, 6}, {0, 1, 5, 4}, {3, 0, 4, 7}, {1, 2, 6, 5}, {4, 5, 6, 7} };
short cube_texCoords [2][4] = {
{0.0, 0.0, 1.0, 1.0}, {0.0, 1.0, 1.0, 0.0} };
// ---------------------------------
enum {
kBufferRectInset = 75
};
pascal void IdleTimer (EventLoopTimerRef inTimer, void* userData);
EventLoopTimerUPP GetTimerUPP (void);
EventHandlerUPP gMainEvtHandler = NULL; // Command-process event handler
EventHandlerUPP gModalEvtHandler = NULL; // modal window event handler
EventHandlerUPP gWindowEvtHandler = NULL; // window event handler
EventLoopTimerRef gTimer = NULL; // timer
Boolean gBufferRect = false;
Boolean gClip = false;
Boolean gAnimate = false;
WindowRef gWindow = NULL;
WindowRef gModalWindow = NULL;
// ---------------------------------
// sets static text control of id and sig to text
static void SetControlText (WindowRef window, SInt32 id, OSType sig, char * text)
{
ControlID idControl;
ControlRef control;
idControl.signature = sig;
idControl.id = id;
GetControlByID (window, &idControl, &control);
SetControlData (control, kControlNoPart, kControlStaticTextTextTag, strlen (text), text);
}
// ---------------------------------
static void SetClipRegion (WindowRef win)
{
RgnHandle clipRgn = NewRgn();
RgnHandle maskRgn = NewRgn();
Rect rectPort, bounds = { -32767, -32767, 32767, 32767 };
ControlID idControl;
ControlRef control;
GetWindowPortBounds(win, &rectPort);
// some random region
SetEmptyRgn (clipRgn);
OpenRgn ();
MoveTo (rectPort.left + 10, rectPort.top + 30);
LineTo (rectPort.right - 20, rectPort.top + 50);
LineTo (rectPort.right - 50, rectPort.bottom - 25);
LineTo (rectPort.left + 10, rectPort.top + 50);
CloseRgn (clipRgn);
// control cutouts
idControl.signature = 'cbrt';
for (idControl.id = 0; idControl.id < 4; idControl.id++) {
GetControlByID (win, &idControl, &control);
GetControlBounds (control, &bounds);
RectRgn(maskRgn, &bounds);
DiffRgn(clipRgn, maskRgn, clipRgn);
}
// set clip region for agl
aglSetInteger ((AGLContext)GetWRefCon (win), AGL_CLIP_REGION, (const GLint *)clipRgn);
DisposeRgn(clipRgn);
DisposeRgn(maskRgn);
}
// ---------------------------------
static void cleanupAGL(AGLContext ctx)
{
aglSetCurrentContext(NULL);
aglSetDrawable(ctx, NULL);
aglDestroyContext(ctx);
}
// ---------------------------------
static void resizeGL (WindowRef win)
{
// handle window size updates for GL
GLfloat fAspect;
short w, h;
Rect rectPort;
GLint bufferRect[4];
char strOut[128];
GetWindowPortBounds(win, &rectPort);
w = rectPort.right - rectPort.left;
h = rectPort.bottom - rectPort.top;
// set control text
sprintf (strOut, "Window size: %d x %d", w, h);
SetControlText (win, 2, 'cbrt', strOut);
DrawControls (win);
if (gClip) {
SetClipRegion (win);
aglEnable ((AGLContext)GetWRefCon (win), AGL_CLIP_REGION);
} else
aglDisable ((AGLContext)GetWRefCon (win), AGL_CLIP_REGION);
if (gBufferRect) {
w -= kBufferRectInset * 2;
h -= kBufferRectInset * 2;
bufferRect[0] = kBufferRectInset;
bufferRect[1] = kBufferRectInset;
bufferRect[2] = w;
bufferRect[3] = h;
aglSetInteger ((AGLContext)GetWRefCon (win), AGL_BUFFER_RECT, bufferRect);
aglEnable ((AGLContext)GetWRefCon (win), AGL_BUFFER_RECT);
} else
aglDisable ((AGLContext)GetWRefCon (win), AGL_BUFFER_RECT);
// Prevent a divide by zero
if(h == 0)
h = 1;
fAspect = (GLfloat) w / (GLfloat) h;
aglSetCurrentContext ((AGLContext)GetWRefCon (win));
// not really needed because enable/disable above actually does this
// aglUpdateContext ((AGLContext)GetWRefCon (win));
// Set Viewport to window/buffer rect dimensions
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode (GL_PROJECTION);
// Reset coordinate system
glLoadIdentity ();
// Setup perspective for viewing
gluPerspective (55.0, fAspect, 3, 20);
}
// ---------------------------------
static void drawCubeGL (GLfloat fSize)
{
long f, i;
glBegin (GL_QUADS);
glColor3f (0.8f, 0.2f, 0.6f);
for (f = 0; f < num_faces; f++)
for (i = 0; i < 4; i++)
glVertex3f(cube_vertices[cube_faces[f][i]][0] * fSize, cube_vertices[cube_faces[f][i]][1] * fSize, cube_vertices[cube_faces[f][i]][2] * fSize);
glEnd ();
glColor3f (0.0, 1.0, 1.0);
for (f = 0; f < num_faces; f++)
{
glBegin (GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex3f(cube_vertices[cube_faces[f][i]][0] * fSize, cube_vertices[cube_faces[f][i]][1] * fSize, cube_vertices[cube_faces[f][i]][2] * fSize);
glEnd ();
}
}
// ---------------------------------
static void drawGL (AGLContext aglContext)
{
static GLfloat fRot [3] = { 0.0, 0.0, 0.0 };
static GLfloat fVel [3] = { 0.3, 0.1, 0.2 };
static GLfloat fAccel [3] = { 0.003, -0.005, 0.004 };
GLfloat fVMax = 2.0;
short i;
// do velocities
if (gAnimate == true) {
for (i = 0; i < 3; i++)
{
fVel[i] += fAccel[i];
if (fVel[i] > fVMax)
{
fAccel[i] *= -1.0;
fVel[i] = fVMax;
}
else if (fVel[i] < -fVMax)
{
fAccel[i] *= -1.0;
fVel[i] = -fVMax;
}
fRot[i] += fVel[i];
while (fRot[i] > 360.0)
fRot[i] -= 360.0;
while (fRot[i] < -360.0)
fRot[i] += 360.0;
}
}
aglSetCurrentContext (aglContext);
// Viewing transformation
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -8.0);
glRotatef (fRot[0], 1.0, 0.0, 0.0);
glRotatef (fRot[1], 0.0, 1.0, 0.0);
glRotatef (fRot[2], 0.0, 0.0, 1.0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
drawCubeGL(2.0);
}
// ---------------------------------
static AGLContext setupAGL(AGLDrawable win)
{
GLint attrib[] = { AGL_RGBA, AGL_DOUBLEBUFFER, AGL_NONE };
AGLPixelFormat fmt;
AGLContext ctx;
GLboolean ok;
/* Choose an rgb pixel format */
fmt = aglChoosePixelFormat(NULL, 0, attrib);
if(fmt == NULL) return NULL;
/* Create an AGL context */
ctx = aglCreateContext(fmt, NULL);
if(ctx == NULL) return NULL;
/* Attach the window to the context */
ok = aglSetDrawable(ctx, win);
if(!ok) return NULL;
/* Make the context the current context */
ok = aglSetCurrentContext(ctx);
if(!ok) return NULL;
/* Pixel format is no longer needed */
aglDestroyPixelFormat(fmt);
glShadeModel (GL_SMOOTH);
glEnable(GL_DEPTH_TEST); // Hidden surface removal
glEnable(GL_CULL_FACE); // Do not draw inside of cube
glFrontFace(GL_CCW); // Counter clock-wise polygons face out
glClearColor (0.2f, 0.2f, 0.4f, 1.0f);
return ctx;
}
// ---------------------------------
pascal void IdleTimer (EventLoopTimerRef inTimer, void* userData)
{
#pragma unused (inTimer, userData)
if (gAnimate == true) {
drawGL ((AGLContext) GetWRefCon(gWindow));
aglSwapBuffers ((AGLContext) GetWRefCon(gWindow));
drawGL ((AGLContext) GetWRefCon(gModalWindow));
aglSwapBuffers ((AGLContext) GetWRefCon(gModalWindow));
}
}
// ---------------------------------
// make timer UPP
EventLoopTimerUPP GetTimerUPP (void)
{
static EventLoopTimerUPP sTimerUPP = NULL;
if (sTimerUPP == NULL)
sTimerUPP = NewEventLoopTimerUPP (IdleTimer);
return sTimerUPP;
}
// ---------------------------------
// handle events for game window
static pascal OSStatus WindowEvtHndlr (EventHandlerCallRef myHandler, EventRef event, void* userData)
{
#pragma unused (myHandler, userData)
OSStatus result = eventNotHandledErr;
if ((GetEventKind(event) == kEventWindowShown) || (GetEventKind(event) == kEventWindowBoundsChanged)) {
resizeGL ((WindowRef) userData);
drawGL ((AGLContext) GetWRefCon((WindowRef) userData));
glFlush ();
} else if (GetEventKind(event) == kEventWindowDrawContent) {
drawGL ((AGLContext) GetWRefCon((WindowRef) userData));
aglSwapBuffers((AGLContext) GetWRefCon((WindowRef) userData));// send swap command
} else if (GetEventKind(event) == kEventProcessCommand) {
HICommand command;
GetEventParameter (event, kEventParamDirectObject, kEventParamHICommand, NULL, sizeof(command), NULL, &command);
if (command.commandID == kHICommandOK)
{
if (gTimer)
RemoveEventLoopTimer(gTimer);
gTimer = NULL;
cleanupAGL ((AGLContext)GetWRefCon ((WindowRef)userData));
DisposeWindow ((WindowRef)userData);
gWindow = NULL;
result = noErr;
}
}
return result;
}
// ---------------------------------
// handle events for configuration window
static pascal OSStatus ModalEvtHndlr (EventHandlerCallRef myHandler, EventRef event, void* userData)
{
#pragma unused (myHandler)
OSStatus result = eventNotHandledErr;
if ((GetEventKind(event) == kEventWindowShown) || (GetEventKind(event) == kEventWindowBoundsChanged)) {
resizeGL ((WindowRef) userData);
drawGL ((AGLContext) GetWRefCon((WindowRef) userData));
glFlush ();
} else if (GetEventKind(event) == kEventWindowDrawContent) {
drawGL ((AGLContext) GetWRefCon((WindowRef) userData));
aglSwapBuffers((AGLContext) GetWRefCon((WindowRef) userData));// send swap command
} else if (GetEventKind(event) == kEventProcessCommand) {
HICommand command;
GetEventParameter (event, kEventParamDirectObject, kEventParamHICommand, NULL, sizeof(command), NULL, &command);
if (command.commandID == kHICommandOK) {
cleanupAGL ((AGLContext)GetWRefCon ((WindowRef)userData));
DisposeWindow ((WindowRef)userData);
gModalWindow = NULL;
result = noErr;
}
}
return result;
}
// ---------------------------------
// main application event handler
static pascal OSStatus MainEvtHndlr (EventHandlerCallRef myHandler, EventRef event, void* userData)
{
#pragma unused (myHandler, userData)
Rect rectPort;
CGSize min;
OSStatus err = eventNotHandledErr;
IBNibRef nibRef;
EventHandlerRef ref;
EventTypeSpec list[] = { { kEventClassWindow, kEventWindowShown},
{ kEventClassWindow, kEventWindowDrawContent },
{ kEventClassCommand, kEventProcessCommand },
{ kEventClassWindow, kEventWindowBoundsChanged} };
if (GetEventKind(event) == kEventProcessCommand) {
HICommand command;
GetEventParameter (event, kEventParamDirectObject, kEventParamHICommand, NULL, sizeof(command), NULL, &command);
if (command.commandID == 'newm') {
if (NULL == gModalWindow) {
err = CreateNibReference(CFSTR("main"), &nibRef);
err = CreateWindowFromNib(nibRef, CFSTR("ModalWindow"), &gModalWindow);
GetWindowPortBounds(gModalWindow, &rectPort);
min.width = rectPort.right - rectPort.left;
min.height = rectPort.bottom - rectPort.top;
SetWindowResizeLimits (gModalWindow, &min, NULL);
if (!gModalEvtHandler)
gModalEvtHandler = NewEventHandlerUPP (ModalEvtHndlr);
InstallWindowEventHandler (gModalWindow, gModalEvtHandler, GetEventTypeCount (list), list, (void *)gModalWindow, &ref);
DisposeNibReference(nibRef);
SetWRefCon (gModalWindow, (long) setupAGL(GetWindowPort (gModalWindow)));
ShowWindow( gModalWindow );
}
err = noErr;
} else if (command.commandID == 'neww') {
if (NULL == gWindow) {
err = CreateNibReference(CFSTR("main"), &nibRef);
err = CreateWindowFromNib (nibRef, CFSTR("Window"), &gWindow);
GetWindowPortBounds(gWindow, &rectPort);
min.width = rectPort.right - rectPort.left;
min.height = rectPort.bottom - rectPort.top;
SetWindowResizeLimits (gWindow, &min, NULL);
if (!gWindowEvtHandler)
gWindowEvtHandler = NewEventHandlerUPP (WindowEvtHndlr);
InstallWindowEventHandler (gWindow, gWindowEvtHandler, GetEventTypeCount (list), list, (void *) gWindow, &ref);
DisposeNibReference(nibRef);
// install timer
if (NULL != gTimer)
RemoveEventLoopTimer(gTimer);
InstallEventLoopTimer (GetCurrentEventLoop (), 0, 0.01, GetTimerUPP (), (void *) gWindow, &gTimer);
SetWRefCon (gWindow, (long) setupAGL(GetWindowPort (gWindow)));
ShowWindow( gWindow );
}
err = noErr;
} else if (command.commandID == 'bufr') {
gBufferRect = 1 - gBufferRect;
if (gWindow) {
resizeGL (gWindow); // handle chnage in settings
drawGL ((AGLContext) GetWRefCon(gWindow)); // redraw
aglSwapBuffers((AGLContext) GetWRefCon(gWindow));// send swap command
}
if (gModalWindow) {
resizeGL (gModalWindow); // handle chnage in settings
drawGL ((AGLContext) GetWRefCon(gModalWindow)); // redraw
aglSwapBuffers((AGLContext) GetWRefCon(gModalWindow));// send swap command
}
err = noErr;
} else if (command.commandID == 'clip') {
gClip = 1 - gClip;
if (gWindow) {
resizeGL (gWindow); // handle chnage in settings
drawGL ((AGLContext) GetWRefCon(gWindow)); // redraw
aglSwapBuffers((AGLContext) GetWRefCon(gWindow));// send swap command
}
if (gModalWindow) {
resizeGL (gModalWindow);// handle chnage in settings
drawGL ((AGLContext) GetWRefCon(gModalWindow)); // redraw
aglSwapBuffers((AGLContext) GetWRefCon(gModalWindow));// send swap command
}
err = noErr;
} else if (command.commandID == 'anim') {
gAnimate = 1 - gAnimate;
err = noErr;
}
}
return err;
}
// ---------------------------------
int main(int argc, char* argv[])
{
#pragma unused (argc, argv)
IBNibRef nibRef;
OSStatus err;
EventHandlerRef ref;
EventTypeSpec list[] = { { kEventClassCommand, kEventProcessCommand } };
// CreateNibReference only searches into the application bundle.
err = CreateNibReference(CFSTR("main"), &nibRef);
require_noerr( err, CantGetNibRef );
// Once the nib reference is created, set the menu bar. "MainMenu" is the name of the menu bar
// object. This name is set in InterfaceBuilder when the nib is created.
err = SetMenuBarFromNib(nibRef, CFSTR("MainMenu"));
require_noerr( err, CantSetMenuBar );
gMainEvtHandler = NewEventHandlerUPP (MainEvtHndlr);
InstallApplicationEventHandler (gMainEvtHandler, GetEventTypeCount (list), list, 0, &ref);
// We don't need the nib reference anymore.
DisposeNibReference(nibRef);
// Call the event loop
RunApplicationEventLoop();
CantSetMenuBar:
CantGetNibRef:
return err;
}
</pre>
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