1/*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "GrGLContextInfo.h"
9
10GrGLContextInfo::~GrGLContextInfo() {
11    GrSafeUnref(fInterface);
12}
13
14GrGLContextInfo::GrGLContextInfo() {
15    this->reset();
16}
17
18GrGLContextInfo::GrGLContextInfo(const GrGLInterface* interface) {
19    fInterface = NULL;
20    this->initialize(interface);
21}
22
23GrGLContextInfo::GrGLContextInfo(const GrGLContextInfo& ctx) {
24    fInterface = NULL;
25    *this = ctx;
26}
27
28GrGLContextInfo& GrGLContextInfo::operator = (const GrGLContextInfo& ctx) {
29    GrSafeAssign(fInterface, ctx.fInterface);
30    fBindingInUse = ctx.fBindingInUse;
31    fGLVersion = ctx.fGLVersion;
32    fGLSLGeneration = ctx.fGLSLGeneration;
33    fVendor = ctx.fVendor;
34    fExtensionString = ctx.fExtensionString;
35    fGLCaps = ctx.fGLCaps;
36    return *this;
37}
38
39void GrGLContextInfo::reset() {
40    GrSafeSetNull(fInterface);
41    fBindingInUse = kNone_GrGLBinding;
42    fGLVersion = GR_GL_VER(0, 0);
43    fGLSLGeneration = static_cast<GrGLSLGeneration>(0);
44    fVendor = kOther_GrGLVendor;
45    fExtensionString = "";
46    fGLCaps.reset();
47}
48
49bool GrGLContextInfo::initialize(const GrGLInterface* interface) {
50    this->reset();
51    // We haven't validated the GrGLInterface yet, so check for GetString
52    // function pointer
53    if (NULL != interface->fGetString) {
54
55        const GrGLubyte* verUByte;
56        GR_GL_CALL_RET(interface, verUByte, GetString(GR_GL_VERSION));
57        const char* ver = reinterpret_cast<const char*>(verUByte);
58        GrGLBinding binding = GrGLGetBindingInUseFromString(ver);
59
60        if (interface->validate(binding)) {
61
62            fInterface = interface;
63            interface->ref();
64
65            fBindingInUse = binding;
66
67            fGLVersion = GrGLGetVersionFromString(ver);
68
69            fGLSLGeneration = GrGetGLSLGeneration(fBindingInUse,
70                                                  this->interface());
71
72            const GrGLubyte* ext;
73            GR_GL_CALL_RET(interface, ext, GetString(GR_GL_EXTENSIONS));
74            fExtensionString = reinterpret_cast<const char*>(ext);
75            fVendor = GrGLGetVendor(interface);
76            fGLCaps.init(*this);
77            return true;
78        }
79    }
80    return false;
81}
82
83bool GrGLContextInfo::isInitialized() const {
84    return kNone_GrGLBinding != fBindingInUse;
85}
86