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annotate src/ios/glview.mm @ 0:5019d031b485

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initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 05 Jun 2013 22:33:37 +0300
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nuclear@0 1 #import "glview.h"
nuclear@0 2 #include "game.h"
nuclear@0 3 #include "screen.h"
nuclear@0 4 #include "logger.h"
nuclear@0 5
nuclear@0 6 static GLView *view;
nuclear@0 7
nuclear@0 8 void request_redisplay()
nuclear@0 9 {
nuclear@0 10 // TODO
nuclear@0 11 }
nuclear@0 12
nuclear@0 13 void swap_buffers()
nuclear@0 14 {
nuclear@0 15 if(view) {
nuclear@0 16 [view swap_buffers];
nuclear@0 17 }
nuclear@0 18 }
nuclear@0 19
nuclear@0 20
nuclear@0 21 @implementation GLView
nuclear@0 22
nuclear@0 23 @synthesize animating;
nuclear@0 24 @dynamic anim_frame_interval;
nuclear@0 25
nuclear@0 26 // You must implement this method
nuclear@0 27 + (Class)layerClass
nuclear@0 28 {
nuclear@0 29 return [CAEAGLLayer class];
nuclear@0 30 }
nuclear@0 31
nuclear@0 32
nuclear@0 33 - (id)initWithFrame: (CGRect) frame
nuclear@0 34 {
nuclear@0 35 if((self = [super initWithFrame: frame]))
nuclear@0 36 {
nuclear@0 37 // Get the layer
nuclear@0 38 CAEAGLLayer *eaglLayer = (CAEAGLLayer*)self.layer;
nuclear@0 39
nuclear@0 40 //self.contentScaleFactor = 2.0;
nuclear@0 41
nuclear@0 42 eaglLayer.opaque = TRUE;
nuclear@0 43 eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:FALSE],
nuclear@0 44 kEAGLDrawablePropertyRetainedBacking, kEAGLColorFormatRGBA8,
nuclear@0 45 kEAGLDrawablePropertyColorFormat, nil];
nuclear@0 46
nuclear@0 47 // initialize OpenGL ES context
nuclear@0 48 context = [[EAGLContext alloc] initWithAPI: kEAGLRenderingAPIOpenGLES2];
nuclear@0 49 if(!context || ![EAGLContext setCurrentContext: context]) {
nuclear@0 50 [self release];
nuclear@0 51 return self;
nuclear@0 52 }
nuclear@0 53
nuclear@0 54 // create the framebuffer
nuclear@0 55 glGenFramebuffers(1, &fbo);
nuclear@0 56 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@0 57
nuclear@0 58 glGenRenderbuffers(1, &rbuf_color);
nuclear@0 59 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0 60 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbuf_color);
nuclear@0 61
nuclear@0 62 glGenRenderbuffers(1, &rbuf_depth);
nuclear@0 63 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth);
nuclear@0 64 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbuf_depth);
nuclear@0 65
nuclear@0 66 animating = FALSE;
nuclear@0 67 display_link_supported = FALSE;
nuclear@0 68 anim_frame_interval = 1;
nuclear@0 69 display_link = nil;
nuclear@0 70 anim_timer = nil;
nuclear@0 71
nuclear@0 72 // A system version of 3.1 or greater is required to use CADisplayLink. The NSTimer
nuclear@0 73 // class is used as fallback when it isn't available.
nuclear@0 74 NSString *reqSysVer = @"3.1";
nuclear@0 75 NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
nuclear@0 76 if([currSysVer compare: reqSysVer options: NSNumericSearch] != NSOrderedAscending) {
nuclear@0 77 display_link_supported = TRUE;
nuclear@0 78 }
nuclear@0 79
nuclear@0 80 self.multipleTouchEnabled = 1;
nuclear@0 81
nuclear@0 82 if(!game_init()) {
nuclear@0 83 exit(1);
nuclear@0 84 }
nuclear@0 85 }
nuclear@0 86
nuclear@0 87 view = self;
nuclear@0 88 return self;
nuclear@0 89 }
nuclear@0 90
nuclear@0 91 - (void)drawView: (id)sender
nuclear@0 92 {
nuclear@0 93 game_display();
nuclear@0 94 }
nuclear@0 95
nuclear@0 96 - (void)swap_buffers
nuclear@0 97 {
nuclear@0 98 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0 99 [context presentRenderbuffer: GL_RENDERBUFFER];
nuclear@0 100 }
nuclear@0 101
nuclear@0 102 - (BOOL)resize: (CAEAGLLayer*)layer
nuclear@0 103 {
nuclear@0 104 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0 105 [context renderbufferStorage: GL_RENDERBUFFER fromDrawable: layer];
nuclear@0 106 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &xsz);
nuclear@0 107 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &ysz);
nuclear@0 108
nuclear@0 109 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth);
nuclear@0 110 glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, xsz, ysz);
nuclear@0 111
nuclear@0 112 if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
nuclear@0 113 NSLog(@"resize failed, framebuffer incomplete\n");
nuclear@0 114 return FALSE;
nuclear@0 115 }
nuclear@0 116 assert(glGetError() == GL_NO_ERROR);
nuclear@0 117
nuclear@0 118 //current_screen()->reshape(xsz, ysz);
nuclear@0 119 return TRUE;
nuclear@0 120 }
nuclear@0 121
nuclear@0 122 - (void)layoutSubviews
nuclear@0 123 {
nuclear@0 124 [self resize: (CAEAGLLayer*)self.layer];
nuclear@0 125 [self drawView:nil];
nuclear@0 126 }
nuclear@0 127
nuclear@0 128 - (NSInteger)anim_frame_interval
nuclear@0 129 {
nuclear@0 130 return anim_frame_interval;
nuclear@0 131 }
nuclear@0 132
nuclear@0 133 - (void)setAnimationFrameInterval: (NSInteger)frameInterval
nuclear@0 134 {
nuclear@0 135 // Frame interval defines how many display frames must pass between each time the
nuclear@0 136 // display link fires. The display link will only fire 30 times a second when the
nuclear@0 137 // frame internal is two on a display that refreshes 60 times a second. The default
nuclear@0 138 // frame interval setting of one will fire 60 times a second when the display refreshes
nuclear@0 139 // at 60 times a second. A frame interval setting of less than one results in undefined
nuclear@0 140 // behavior.
nuclear@0 141 if(frameInterval >= 1) {
nuclear@0 142 anim_frame_interval = frameInterval;
nuclear@0 143
nuclear@0 144 if(animating) {
nuclear@0 145 [self stopAnimation];
nuclear@0 146 [self startAnimation];
nuclear@0 147 }
nuclear@0 148 }
nuclear@0 149 }
nuclear@0 150
nuclear@0 151 - (void)startAnimation
nuclear@0 152 {
nuclear@0 153 if(!animating) {
nuclear@0 154 if(display_link_supported) {
nuclear@0 155 // CADisplayLink is API new to iPhone SDK 3.1. Compiling against earlier versions will result in a warning, but can be dismissed
nuclear@0 156 // if the system version runtime check for CADisplayLink exists in -initWithCoder:. The runtime check ensures this code will
nuclear@0 157 // not be called in system versions earlier than 3.1.
nuclear@0 158
nuclear@0 159 display_link = [NSClassFromString(@"CADisplayLink") displayLinkWithTarget:self selector:@selector(drawView:)];
nuclear@0 160 [display_link setFrameInterval: anim_frame_interval];
nuclear@0 161 [display_link addToRunLoop: [NSRunLoop currentRunLoop] forMode: NSDefaultRunLoopMode];
nuclear@0 162 } else {
nuclear@0 163 anim_timer = [NSTimer scheduledTimerWithTimeInterval: (NSTimeInterval)((1.0 / 60.0) * anim_frame_interval)
nuclear@0 164 target: self selector: @selector(drawView:) userInfo: nil repeats: TRUE];
nuclear@0 165 }
nuclear@0 166
nuclear@0 167 animating = TRUE;
nuclear@0 168 }
nuclear@0 169 }
nuclear@0 170
nuclear@0 171 - (void)stopAnimation
nuclear@0 172 {
nuclear@0 173 if(animating) {
nuclear@0 174 if(display_link_supported) {
nuclear@0 175 [display_link invalidate];
nuclear@0 176 display_link = nil;
nuclear@0 177 } else {
nuclear@0 178 [anim_timer invalidate];
nuclear@0 179 anim_timer = nil;
nuclear@0 180 }
nuclear@0 181
nuclear@0 182 animating = FALSE;
nuclear@0 183 }
nuclear@0 184 }
nuclear@0 185
nuclear@0 186 - (void)dealloc
nuclear@0 187 {
nuclear@0 188 game_cleanup();
nuclear@0 189
nuclear@0 190 if(fbo) {
nuclear@0 191 glDeleteFramebuffers(1, &fbo);
nuclear@0 192 fbo = 0;
nuclear@0 193 }
nuclear@0 194 if(rbuf_color) {
nuclear@0 195 glDeleteRenderbuffers(1, &rbuf_color);
nuclear@0 196 rbuf_color = 0;
nuclear@0 197 }
nuclear@0 198 if(rbuf_depth) {
nuclear@0 199 glDeleteRenderbuffers(1, &rbuf_depth);
nuclear@0 200 rbuf_depth = 0;
nuclear@0 201 }
nuclear@0 202
nuclear@0 203 if([EAGLContext currentContext] == context) {
nuclear@0 204 [EAGLContext setCurrentContext: nil];
nuclear@0 205 }
nuclear@0 206 [context release];
nuclear@0 207 context = nil;
nuclear@0 208
nuclear@0 209 [super dealloc];
nuclear@0 210 }
nuclear@0 211
nuclear@0 212 @end