2723
|
1 |
/*
|
|
2 |
SDL - Simple DirectMedia Layer
|
|
3 |
Copyright (C) 1997-2009 Sam Lantinga
|
|
4 |
|
|
5 |
This library is free software; you can redistribute it and/or
|
|
6 |
modify it under the terms of the GNU Lesser General Public
|
|
7 |
License as published by the Free Software Foundation; either
|
|
8 |
version 2.1 of the License, or (at your option) any later version.
|
|
9 |
|
|
10 |
This library is distributed in the hope that it will be useful,
|
|
11 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
12 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
13 |
Lesser General Public License for more details.
|
|
14 |
|
|
15 |
You should have received a copy of the GNU Lesser General Public
|
|
16 |
License along with this library; if not, write to the Free Software
|
|
17 |
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
18 |
|
|
19 |
Sam Lantinga
|
|
20 |
slouken@libsdl.org
|
|
21 |
*/
|
|
22 |
|
|
23 |
#import <QuartzCore/QuartzCore.h>
|
|
24 |
#import <OpenGLES/EAGLDrawable.h>
|
|
25 |
#import "SDL_uikitopenglview.h"
|
|
26 |
|
|
27 |
@interface SDL_uikitopenglview (privateMethods)
|
|
28 |
|
|
29 |
- (BOOL) createFramebuffer;
|
|
30 |
- (void) destroyFramebuffer;
|
|
31 |
|
|
32 |
@end
|
|
33 |
|
|
34 |
|
|
35 |
@implementation SDL_uikitopenglview
|
|
36 |
|
|
37 |
@synthesize context;
|
|
38 |
|
|
39 |
+ (Class)layerClass {
|
|
40 |
return [CAEAGLLayer class];
|
|
41 |
}
|
|
42 |
|
|
43 |
- (id)initWithFrame:(CGRect)frame \
|
|
44 |
retainBacking:(BOOL)retained \
|
|
45 |
rBits:(int)rBits \
|
|
46 |
gBits:(int)gBits \
|
|
47 |
bBits:(int)bBits \
|
|
48 |
aBits:(int)aBits \
|
|
49 |
depthBits:(int)depthBits \
|
|
50 |
{
|
|
51 |
|
|
52 |
NSString *colorFormat=nil;
|
|
53 |
GLuint depthBufferFormat;
|
|
54 |
BOOL useDepthBuffer;
|
|
55 |
|
|
56 |
if (rBits == 8 && gBits == 8 && bBits == 8) {
|
|
57 |
/* if user specifically requests rbg888 or some color format higher than 16bpp */
|
|
58 |
colorFormat = kEAGLColorFormatRGBA8;
|
|
59 |
}
|
|
60 |
else {
|
|
61 |
/* default case (faster) */
|
|
62 |
colorFormat = kEAGLColorFormatRGB565;
|
|
63 |
}
|
|
64 |
|
|
65 |
if (depthBits == 24) {
|
|
66 |
useDepthBuffer = YES;
|
|
67 |
depthBufferFormat = GL_DEPTH_COMPONENT24_OES;
|
|
68 |
}
|
|
69 |
else if (depthBits == 0) {
|
|
70 |
useDepthBuffer = NO;
|
|
71 |
}
|
|
72 |
else {
|
|
73 |
/* default case when depth buffer is not disabled */
|
|
74 |
/*
|
|
75 |
strange, even when we use this, we seem to get a 24 bit depth buffer on iPhone.
|
|
76 |
perhaps that's the only depth format iPhone actually supports
|
|
77 |
*/
|
|
78 |
useDepthBuffer = YES;
|
|
79 |
depthBufferFormat = GL_DEPTH_COMPONENT16_OES;
|
|
80 |
}
|
|
81 |
|
|
82 |
|
|
83 |
// we invert heigh and size to get q landscape mode up
|
|
84 |
CGRect rect = [[UIScreen mainScreen] bounds];
|
|
85 |
float swapTemp = rect.size.height;
|
|
86 |
rect.size.width = rect.size.height;
|
|
87 |
rect.size.height = swapTemp;
|
|
88 |
|
|
89 |
if ((self = [super initWithFrame:rect])) {
|
|
90 |
// Get the layer
|
|
91 |
CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer;
|
|
92 |
|
|
93 |
eaglLayer.opaque = YES;
|
|
94 |
eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
|
|
95 |
[NSNumber numberWithBool: retained], kEAGLDrawablePropertyRetainedBacking, colorFormat, kEAGLDrawablePropertyColorFormat, nil];
|
|
96 |
|
|
97 |
context = [[EAGLContext alloc] initWithAPI: kEAGLRenderingAPIOpenGLES1];
|
|
98 |
|
|
99 |
if (!context || ![EAGLContext setCurrentContext:context]) {
|
|
100 |
[self release];
|
|
101 |
return nil;
|
|
102 |
}
|
|
103 |
|
|
104 |
/* create the buffers */
|
|
105 |
glGenFramebuffersOES(1, &viewFramebuffer);
|
|
106 |
glGenRenderbuffersOES(1, &viewRenderbuffer);
|
|
107 |
|
|
108 |
glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer);
|
|
109 |
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
|
|
110 |
[context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:(CAEAGLLayer*)self.layer];
|
|
111 |
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, viewRenderbuffer);
|
|
112 |
|
|
113 |
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth);
|
|
114 |
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight);
|
|
115 |
|
|
116 |
if (useDepthBuffer) {
|
|
117 |
glGenRenderbuffersOES(1, &depthRenderbuffer);
|
|
118 |
glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthRenderbuffer);
|
|
119 |
glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depthBufferFormat, backingWidth, backingHeight);
|
|
120 |
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthRenderbuffer);
|
|
121 |
}
|
|
122 |
|
|
123 |
if(glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES) {
|
|
124 |
return NO;
|
|
125 |
}
|
|
126 |
/* end create buffers */
|
|
127 |
}
|
|
128 |
return self;
|
|
129 |
}
|
|
130 |
|
|
131 |
- (void)setCurrentContext {
|
|
132 |
[EAGLContext setCurrentContext:context];
|
|
133 |
}
|
|
134 |
|
|
135 |
|
|
136 |
- (void)swapBuffers {
|
|
137 |
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
|
|
138 |
[context presentRenderbuffer:GL_RENDERBUFFER_OES];
|
|
139 |
}
|
|
140 |
|
|
141 |
|
|
142 |
- (void)layoutSubviews {
|
|
143 |
[EAGLContext setCurrentContext:context];
|
|
144 |
}
|
|
145 |
|
|
146 |
- (void)destroyFramebuffer {
|
|
147 |
|
|
148 |
glDeleteFramebuffersOES(1, &viewFramebuffer);
|
|
149 |
viewFramebuffer = 0;
|
|
150 |
glDeleteRenderbuffersOES(1, &viewRenderbuffer);
|
|
151 |
viewRenderbuffer = 0;
|
|
152 |
|
|
153 |
if (depthRenderbuffer) {
|
|
154 |
glDeleteRenderbuffersOES(1, &depthRenderbuffer);
|
|
155 |
depthRenderbuffer = 0;
|
|
156 |
}
|
|
157 |
}
|
|
158 |
|
|
159 |
|
|
160 |
- (void)dealloc {
|
|
161 |
|
|
162 |
[self destroyFramebuffer];
|
|
163 |
if ([EAGLContext currentContext] == context) {
|
|
164 |
[EAGLContext setCurrentContext:nil];
|
|
165 |
}
|
|
166 |
[context release];
|
|
167 |
[super dealloc];
|
|
168 |
|
|
169 |
}
|
|
170 |
|
|
171 |
@end
|