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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">/*
*
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.
*
*/
#import "MainOpenGLView.h"
#include <sys/time.h>
#include <unistd.h>
#include <QuickTime/ImageCompression.h> // for image loading and decompression
#include <QuickTime/QuickTimeComponents.h> // for file type support
#include <OpenGL/CGLCurrent.h>
#include <OpenGL/CGLContext.h>
@implementation MainOpenGLView
- (void) loadBufferFromImageFile: (NSString*) path: (GLubyte *) imagePtr: (GLuint) imageWidth: (GLuint) imageHeight: (GLuint) imageDepth
{
CFURLRef url;
FSRef fsRef;
BOOL ok;
GWorldPtr pGWorld = NULL;
OSType pixelFormat;
FSSpec fsspecImage;
long rowStride; // length, in bytes, of a pixel row in the image
GraphicsImportComponent giComp; // componenet for importing image
Rect rectImage; // rectangle of source image
ImageDescriptionHandle hImageDesc; // handle to image description used to get image depth
MatrixRecord matrix;
GDHandle origDevice; // save field for current graphics device
CGrafPtr origPort; // save field for current graphics port
OSStatus err = noErr; // err return value
long origImageWidth, origImageHeight;
url = CFURLCreateWithFileSystemPath(NULL, (CFStringRef) path, kCFURLPOSIXPathStyle, false);
if(!url) return;
ok = CFURLGetFSRef(url, &fsRef);
CFRelease(url);
if(!ok) return;
err = FSGetCatalogInfo(&fsRef, kFSCatInfoNone, NULL, NULL, &fsspecImage, NULL);
if(err) return;
// get imorter for the image tyoe in file
GetGraphicsImporterForFile (&fsspecImage, &giComp);
if (err != noErr) return;
// Create GWorld
err = GraphicsImportGetNaturalBounds (giComp, &rectImage); //get the image bounds
if (err != noErr) return;
hImageDesc = (ImageDescriptionHandle) NewHandle (sizeof (ImageDescriptionHandle)); // create a handle for the image description
HLock ((Handle) hImageDesc); // lock said handle
err = GraphicsImportGetImageDescription (giComp, &hImageDesc); // retrieve the image description
if (err != noErr) return;
origImageWidth = (long) (rectImage.right - rectImage.left); // find width from right side - left side bounds
origImageHeight = (long) (rectImage.bottom - rectImage.top); // same for height
if (imageDepth <= 16) // we are using a 16 bit texture for all images 16 bits or less
{
imageDepth = 16;
pixelFormat = k16BE555PixelFormat;
}
else // otherwise
{
imageDepth = 32;
pixelFormat = k32ARGBPixelFormat;
}
SetRect (&rectImage, 0, 0, (short) imageWidth, (short) imageHeight); // l, t, r. b set image rectangle for creation of GWorld
rowStride = imageWidth * (imageDepth >> 3); // set stride in bytes width of image * pixel depth in bytes
// create a new gworld using our unpadded buffer, ensure we set the pixel type correctly for the expected image bpp
QTNewGWorldFromPtr (&pGWorld, pixelFormat, &rectImage, NULL, NULL, 0, imagePtr, rowStride);
if (NULL == pGWorld)
{
CloseComponent(giComp);
return;
}
GetGWorld (&origPort, &origDevice); // save onscreen graphics port
// decompress (draw) to gworld and thus fill buffer
SetIdentityMatrix (&matrix); // set transform matrix to identity (basically pass thorugh)
// this scale really only does something the case of non-tiled textures to inset them one pixel
// thus maintaining the power of 2 (or desired) dimension of the overall texture
ScaleMatrix (&matrix, X2Fix ((GLfloat) (imageWidth) / (GLfloat) origImageWidth),
X2Fix ((GLfloat) (imageHeight) / (GLfloat) origImageHeight),
X2Fix (0.0), X2Fix (0.0));
// inset texture size to image size and offset by 1 pixel into the image so the
// decompression puts the image into to center of the pixmap inset by one on each side
TranslateMatrix (&matrix, X2Fix (0.0), X2Fix (0.0)); // step in for border
err = GraphicsImportSetMatrix(giComp, &matrix); // set our matrix as the importer matrix
if (err == noErr)
err = GraphicsImportSetGWorld (giComp, pGWorld, NULL); // set the destination of the importer component
if (err == noErr)
err = GraphicsImportSetQuality (giComp, codecLosslessQuality); // we want lossless decompression
if ((err == noErr) && GetGWorldPixMap (pGWorld) && LockPixels (GetGWorldPixMap (pGWorld)))
GraphicsImportDraw (giComp); // if everything looks good draw image to locked pixmap
else
{
DisposeGWorld (pGWorld); // dump gworld
pGWorld = NULL;
CloseComponent(giComp); // dump component
return;
}
UnlockPixels (GetGWorldPixMap (pGWorld)); // unlock pixels
CloseComponent(giComp); // dump component
SetGWorld(origPort, origDevice); // set current graphics port to offscreen
// done with gworld and image since they are loaded to a texture
DisposeGWorld (pGWorld); // do not need gworld
pGWorld = NULL;
}
- (id)initWithFrame:(NSRect)frameRect
{
NSBundle *mainBndl;
NSString *bndlPath;
// Init pixel format attribs
NSOpenGLPixelFormatAttribute attrs[] =
{
NSOpenGLPFAAccelerated,
NSOpenGLPFANoRecovery,
NSOpenGLPFADoubleBuffer,
0
};
// Get pixel format from OpenGL
NSOpenGLPixelFormat* pixFmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
if (!pixFmt)
{
NSLog(@"No pixel format -- exiting");
exit(1);
}
// Set default path to resource directory
mainBndl = [NSBundle mainBundle];
bndlPath = [mainBndl resourcePath];
chdir([bndlPath cString]);
self = [super initWithFrame:frameRect pixelFormat:pixFmt];
[[self openGLContext] makeCurrentContext];
// Init object members
frame_rate = 30;
image_size = 1024;
infinite_fps = GL_FALSE;
timer = [[NSTimer scheduledTimerWithTimeInterval: (1.0f / 30.0f) target: self selector:@selector(drawRect:) userInfo:self repeats:true] retain];
// Setup some basic OpenGL stuff
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glClearColor(1.0, 1.0, 1.0, 1.0);
glColor4f(1.0, 1.0, 1.0, 1.0);
glEnable(GL_RASTER_POSITION_UNCLIPPED_IBM);
glDisable(GL_DITHER);
// Load all images into memory
image = malloc(image_size * image_size * 4);
[self loadBufferFromImageFile :[NSString stringWithFormat:@"../Resources/0.jpg"]:image:image_size:image_size:32];
// Init fps timer
gettimeofday(&cycle_time, NULL);
rasterPosX = 0;
rasterPosY = 0;
// Call for a redisplay
[self setNeedsDisplay:true];
return self;
}
- (void)displayMPixels
{
static long loop_count = 0;
struct timeval t2;
unsigned long t;
GLfloat avg_fps;
loop_count++;
gettimeofday(&t2, NULL);
t = 1000000.0f * (t2.tv_sec - cycle_time.tv_sec) + (t2.tv_usec - cycle_time.tv_usec);
// Display the average data rate
if(t > 1000000.0f * STAT_UPDATE)
{
gettimeofday(&t2, NULL);
t = 1000000.0f * (t2.tv_sec - cycle_time.tv_sec) + (t2.tv_usec - cycle_time.tv_usec);
gettimeofday(&cycle_time, NULL);
avg_fps = (1000000.0f * (GLfloat) loop_count) / (GLfloat) t;
[setFPS setFloatValue:avg_fps];
[setMPixels setFloatValue:(avg_fps * image_size * image_size * 4) / 1000000.0f];
loop_count = 0;
gettimeofday(&cycle_time, NULL);
}
}
- (void)mouseDown:(NSEvent *)theEvent
{
BOOL keepOn = YES;
BOOL isInside = YES;
NSPoint mouseLoc;
while (keepOn) {
theEvent = [[self window] nextEventMatchingMask: NSLeftMouseUpMask |
NSLeftMouseDraggedMask];
mouseLoc = [self convertPoint:[theEvent locationInWindow] fromView:nil];
isInside = [self mouse:mouseLoc inRect:[self bounds]];
switch ([theEvent type])
{
case NSLeftMouseUp:
keepOn = NO;
case NSLeftMouseDragged:
//if (mouseLoc.x < 0) mouseLoc.x = 0;
//if (mouseLoc.y < 0) mouseLoc.y = 0;
// if (mouseLoc.x > [self bounds].size.width) [self bounds].size.width - 1;
//if (mouseLoc.y > [self bounds].size.height) [self bounds].size.height - 1;
rasterPosX = mouseLoc.x - ([self bounds].size.width/2);
rasterPosY = mouseLoc.y - ([self bounds].size.height/2);
[self display];
break;
default:
/* Ignore any other kind of event. */
break; }
}
return;
}
- (void)keyDown:(NSEvent *)theEvent
{
unichar unicodeKey = [[theEvent charactersIgnoringModifiers] characterAtIndex:0];;
if (unicodeKey==NSUpArrowFunctionKey)
{
[zoomSlider setFloatValue:[zoomSlider floatValue]+0.01f];
[zoomText setFloatValue:[zoomSlider floatValue]];
[self zoom:zoomSlider];
}
else if (unicodeKey == NSDownArrowFunctionKey)
{
[zoomSlider setFloatValue:[zoomSlider floatValue]-0.01f];
[zoomText setFloatValue:[zoomSlider floatValue]];
[self zoom:zoomSlider];
}
}
- (BOOL) acceptsFirstResponder{ return YES;}
- (void)drawRect:(NSRect)aRect
{
// Make this context current
[[self openGLContext] makeCurrentContext];
glClear(GL_COLOR_BUFFER_BIT);
glRasterPos2f(rasterPosX, rasterPosY);
if(infinite_fps)
{
struct timeval t1, t2;
GLfloat t=0;
GLuint reps = 0, i;
gettimeofday(&t1, NULL);
do
{
for(i = 0; i < 50; i++)
glDrawPixels(image_size, image_size, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, image);
gettimeofday(&t2, NULL);
t = 1000000.0f *(t2.tv_sec - t1.tv_sec) +(t2.tv_usec - t1.tv_usec);
reps += 50;
}
while(t < 100000.0f); //.1 seconds for infinite_fps
glFinish();
gettimeofday(&t2, NULL);
t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) / 1000000.0f;
[setFPS setFloatValue: (GLfloat) reps / t];
[setMPixels setFloatValue:(reps * image_size * image_size * 4) / (1000000.0f * t)];
}
else
{
glDrawPixels(image_size, image_size, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, image);
// Display the average data rate
[self displayMPixels];
}
// Swap buffer to screen
[[self openGLContext] flushBuffer];
}
- (void)update // moved or resized
{
NSRect rect;
[super update];
[[self openGLContext] makeCurrentContext];
[[self openGLContext] update];
rect = [self bounds];
glViewport(0, 0, (GLint) rect.size.width, (GLint) rect.size.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-(rect.size.width/2), rect.size.width/2, -(rect.size.height/2), rect.size.height/2);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
[self setNeedsDisplay:true];
}
- (void)reshape // scrolled, moved or resized
{
NSRect rect;
[super reshape];
[[self openGLContext] makeCurrentContext];
[[self openGLContext] update];
rect = [self bounds];
glViewport(0, 0, (GLint) rect.size.width, (GLint) rect.size.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-(rect.size.width/2), rect.size.width/2, -(rect.size.height/2), rect.size.height/2);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
[self setNeedsDisplay:true];
}
- (IBAction) zoom: (id) sender
{
GLfloat z = [sender floatValue];
if(z > 0.995f && z < 1.005f) z = 1.0f;
glPixelZoom(z, z);
[zoomText setFloatValue:z];
[self setNeedsDisplay:true];
}
- (IBAction) frameRate: (id) sender
{
GLfloat t;
frame_rate = [sender intValue];
if(!infinite_fps)
{
t = 1.0f / (GLfloat) frame_rate;
[timer invalidate];
[timer release];
timer = [[NSTimer scheduledTimerWithTimeInterval: t target: self selector:@selector(drawRect:) userInfo:self repeats:true] retain];
}
}
- (IBAction) imageSize: (id) sender
{
NSString *str;
image_size = [sender intValue];
if(image) free(image);
image = malloc(image_size * image_size * 4);
[self loadBufferFromImageFile :[NSString stringWithFormat:@"../Resources/0.jpg"]:image:image_size:image_size:32];
str = [NSString stringWithFormat:@"%dx%dx4", image_size, image_size];
[setImageSize setIntValue:image_size];
[setImageSizeTitle setStringValue:str];
}
- (IBAction) infiniteFPS: (id) sender
{
GLfloat t;
infinite_fps = [sender intValue];
if(infinite_fps)
{
t = 0.5f;
[timer invalidate];
[timer release];
timer = [[NSTimer scheduledTimerWithTimeInterval: t target: self selector:@selector(drawRect:) userInfo:self repeats:true] retain];
[self setNeedsDisplay:true];
}
else
{
t = 1.0f / (GLfloat) frame_rate;
[timer invalidate];
[timer release];
timer = [[NSTimer scheduledTimerWithTimeInterval: t target: self selector:@selector(drawRect:) userInfo:self repeats:true] retain];
}
}
- (void)mouseDragged:(NSEvent *)theEvent
{
[self setNeedsDisplay:true];
}
@end
</pre>
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