Upstream version 11.39.266.0
[platform/framework/web/crosswalk.git] / src / third_party / skia / src / gpu / gl / iOS / SkNativeGLContext_iOS.mm
1
2 /*
3  * Copyright 2012 Google Inc.
4  *
5  * Use of this source code is governed by a BSD-style license that can be
6  * found in the LICENSE file.
7  */
8
9 #include "gl/SkNativeGLContext.h"
10 #import <OpenGLES/EAGL.h>
11
12 #define EAGLCTX ((EAGLContext*)(fEAGLContext))
13
14 SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
15     fEAGLContext = [EAGLContext currentContext];
16     if (EAGLCTX) {
17         [EAGLCTX retain];
18     }
19 }
20
21 SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
22     if (EAGLCTX) {
23         [EAGLContext setCurrentContext:EAGLCTX];
24         [EAGLCTX release];
25     }
26 }
27
28 ///////////////////////////////////////////////////////////////////////////////
29
30 SkNativeGLContext::SkNativeGLContext()
31     : fEAGLContext(NULL) {
32 }
33
34 SkNativeGLContext::~SkNativeGLContext() {
35     this->destroyGLContext();
36 }
37
38 void SkNativeGLContext::destroyGLContext() {
39     if (fEAGLContext) {
40         if ([EAGLContext currentContext] == EAGLCTX) {
41             [EAGLContext setCurrentContext:nil];
42         }
43         [EAGLCTX release];
44         fEAGLContext = NULL;
45     }
46 }
47
48 const GrGLInterface* SkNativeGLContext::createGLContext(GrGLStandard forcedGpuAPI) {
49     if (kGL_GrGLStandard == forcedGpuAPI) {
50         return NULL;
51     }
52
53     fEAGLContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
54     [EAGLContext setCurrentContext:EAGLCTX];
55     
56     const GrGLInterface* interface = GrGLCreateNativeInterface();
57     if (!interface) {
58         SkDebugf("Failed to create gl interface");
59         this->destroyGLContext();
60         return NULL;
61     }
62     return interface;
63 }
64
65 void SkNativeGLContext::makeCurrent() const {
66     if (![EAGLContext setCurrentContext:EAGLCTX]) {
67         SkDebugf("Could not set the context.\n");
68     }
69 }
70
71 void SkNativeGLContext::swapBuffers() const { }