Mercurial > sdl-ios-xcode
annotate src/video/uikit/SDL_uikitopenglview.m @ 5151:5429daf5e3f9
The DrawRect API is implemented using lines
| author | Sam Lantinga <slouken@libsdl.org> |
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| date | Tue, 01 Feb 2011 20:50:04 -0800 |
| parents | 5f09cb749d75 |
| children | 115fff0641ee |
| rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
| 2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 #import <QuartzCore/QuartzCore.h> |
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24 #import <OpenGLES/EAGLDrawable.h> |
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25 #import "SDL_uikitopenglview.h" |
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26 |
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27 @interface SDL_uikitopenglview (privateMethods) |
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28 |
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29 - (BOOL) createFramebuffer; |
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30 - (void) destroyFramebuffer; |
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31 |
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32 @end |
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33 |
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34 |
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35 @implementation SDL_uikitopenglview |
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36 |
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37 @synthesize context; |
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38 |
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39 + (Class)layerClass { |
| 5132 | 40 return [CAEAGLLayer class]; |
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41 } |
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42 |
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43 - (id)initWithFrame:(CGRect)frame \ |
| 5132 | 44 retainBacking:(BOOL)retained \ |
| 45 rBits:(int)rBits \ | |
| 46 gBits:(int)gBits \ | |
| 47 bBits:(int)bBits \ | |
| 48 aBits:(int)aBits \ | |
| 49 depthBits:(int)depthBits \ | |
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50 { |
| 5132 | 51 NSString *colorFormat=nil; |
| 52 GLuint depthBufferFormat; | |
| 53 BOOL useDepthBuffer; | |
| 54 | |
| 55 if (rBits == 8 && gBits == 8 && bBits == 8) { | |
| 56 /* if user specifically requests rbg888 or some color format higher than 16bpp */ | |
| 57 colorFormat = kEAGLColorFormatRGBA8; | |
| 58 } | |
| 59 else { | |
| 60 /* default case (faster) */ | |
| 61 colorFormat = kEAGLColorFormatRGB565; | |
| 62 } | |
| 63 | |
| 64 if (depthBits == 24) { | |
| 65 useDepthBuffer = YES; | |
| 66 depthBufferFormat = GL_DEPTH_COMPONENT24_OES; | |
| 67 } | |
| 68 else if (depthBits == 0) { | |
| 69 useDepthBuffer = NO; | |
| 70 } | |
| 71 else { | |
| 72 /* default case when depth buffer is not disabled */ | |
| 73 /* | |
| 74 strange, even when we use this, we seem to get a 24 bit depth buffer on iPhone. | |
| 75 perhaps that's the only depth format iPhone actually supports | |
| 76 */ | |
| 77 useDepthBuffer = YES; | |
| 78 depthBufferFormat = GL_DEPTH_COMPONENT16_OES; | |
| 79 } | |
| 80 | |
| 81 if ((self = [super initWithFrame:frame])) { | |
| 82 // Get the layer | |
| 83 CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer; | |
| 84 | |
| 85 eaglLayer.opaque = YES; | |
| 86 eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys: | |
| 87 [NSNumber numberWithBool: retained], kEAGLDrawablePropertyRetainedBacking, colorFormat, kEAGLDrawablePropertyColorFormat, nil]; | |
| 88 | |
| 89 context = [[EAGLContext alloc] initWithAPI: kEAGLRenderingAPIOpenGLES1]; | |
| 90 | |
| 91 if (!context || ![EAGLContext setCurrentContext:context]) { | |
| 92 [self release]; | |
| 93 return nil; | |
| 94 } | |
| 95 | |
| 96 /* create the buffers */ | |
| 97 glGenFramebuffersOES(1, &viewFramebuffer); | |
| 98 glGenRenderbuffersOES(1, &viewRenderbuffer); | |
| 99 | |
| 100 glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer); | |
| 101 glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer); | |
| 102 [context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:(CAEAGLLayer*)self.layer]; | |
| 103 glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, viewRenderbuffer); | |
| 104 | |
| 105 glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth); | |
| 106 glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight); | |
| 107 | |
| 108 if (useDepthBuffer) { | |
| 109 glGenRenderbuffersOES(1, &depthRenderbuffer); | |
| 110 glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthRenderbuffer); | |
| 111 glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depthBufferFormat, backingWidth, backingHeight); | |
| 112 glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthRenderbuffer); | |
| 113 } | |
| 114 | |
| 115 if(glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES) { | |
| 116 return NO; | |
| 117 } | |
| 118 /* end create buffers */ | |
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119 |
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120 /* Use the main screen scale (for retina display support) */ |
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121 if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) |
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122 self.contentScaleFactor = [UIScreen mainScreen].scale; |
| 5132 | 123 } |
| 124 return self; | |
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125 } |
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126 |
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127 - (void)setCurrentContext { |
| 5132 | 128 [EAGLContext setCurrentContext:context]; |
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129 } |
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130 |
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131 |
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132 - (void)swapBuffers { |
| 5132 | 133 glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer); |
| 134 [context presentRenderbuffer:GL_RENDERBUFFER_OES]; | |
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135 } |
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136 |
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137 |
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138 - (void)layoutSubviews { |
| 5132 | 139 [EAGLContext setCurrentContext:context]; |
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140 } |
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141 |
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142 - (void)destroyFramebuffer { |
| 5132 | 143 glDeleteFramebuffersOES(1, &viewFramebuffer); |
| 144 viewFramebuffer = 0; | |
| 145 glDeleteRenderbuffersOES(1, &viewRenderbuffer); | |
| 146 viewRenderbuffer = 0; | |
| 147 | |
| 148 if (depthRenderbuffer) { | |
| 149 glDeleteRenderbuffersOES(1, &depthRenderbuffer); | |
| 150 depthRenderbuffer = 0; | |
| 151 } | |
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152 } |
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153 |
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154 |
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155 - (void)dealloc { |
| 5132 | 156 [self destroyFramebuffer]; |
| 157 if ([EAGLContext currentContext] == context) { | |
| 158 [EAGLContext setCurrentContext:nil]; | |
| 159 } | |
| 160 [context release]; | |
| 161 [super dealloc]; | |
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162 } |
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163 |
| 2859 | 164 @end |
| 5135 | 165 |
| 166 /* vi: set ts=4 sw=4 expandtab: */ |