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      1 /*
      2  * Copyright 2013 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 "GrGLContext.h"
      9 
     10 ////////////////////////////////////////////////////////////////////////////////
     11 GrGLContextInfo& GrGLContextInfo::operator= (const GrGLContextInfo& ctxInfo) {
     12     fBindingInUse = ctxInfo.fBindingInUse;
     13     fGLVersion = ctxInfo.fGLVersion;
     14     fGLSLGeneration = ctxInfo.fGLSLGeneration;
     15     fVendor = ctxInfo.fVendor;
     16     fExtensions = ctxInfo.fExtensions;
     17     fIsMesa = ctxInfo.fIsMesa;
     18     *fGLCaps = *ctxInfo.fGLCaps.get();
     19     return *this;
     20 }
     21 
     22 bool GrGLContextInfo::initialize(const GrGLInterface* interface) {
     23     this->reset();
     24     // We haven't validated the GrGLInterface yet, so check for GetString
     25     // function pointer
     26     if (interface->fGetString) {
     27         const GrGLubyte* verUByte;
     28         GR_GL_CALL_RET(interface, verUByte, GetString(GR_GL_VERSION));
     29         const char* ver = reinterpret_cast<const char*>(verUByte);
     30         GrGLBinding binding = GrGLGetBindingInUseFromString(ver);
     31 
     32         if (0 != binding && interface->validate(binding) && fExtensions.init(binding, interface)) {
     33             fBindingInUse = binding;
     34 
     35             fGLVersion = GrGLGetVersionFromString(ver);
     36 
     37             fGLSLGeneration = GrGetGLSLGeneration(fBindingInUse, interface);
     38 
     39             fVendor = GrGLGetVendor(interface);
     40 
     41             fIsMesa = GrGLIsMesaFromVersionString(ver);
     42 
     43             fGLCaps->init(*this, interface);
     44             return true;
     45         }
     46     }
     47     return false;
     48 }
     49 
     50 bool GrGLContextInfo::isInitialized() const {
     51     return kNone_GrGLBinding != fBindingInUse;
     52 }
     53 
     54 void GrGLContextInfo::reset() {
     55     fBindingInUse = kNone_GrGLBinding;
     56     fGLVersion = GR_GL_VER(0, 0);
     57     fGLSLGeneration = static_cast<GrGLSLGeneration>(0);
     58     fVendor = kOther_GrGLVendor;
     59     fIsMesa = false;
     60     fExtensions.reset();
     61     fGLCaps->reset();
     62 }
     63 
     64 ////////////////////////////////////////////////////////////////////////////////
     65 GrGLContext::GrGLContext(const GrGLInterface* interface) {
     66     fInterface = NULL;
     67     this->initialize(interface);
     68 }
     69 
     70 GrGLContext::GrGLContext(const GrGLContext& ctx) {
     71     fInterface = NULL;
     72     *this = ctx;
     73 }
     74 
     75 GrGLContext& GrGLContext::operator = (const GrGLContext& ctx) {
     76     GrSafeAssign(fInterface, ctx.fInterface);
     77     fInfo = ctx.fInfo;
     78     return *this;
     79 }
     80 
     81 void GrGLContext::reset() {
     82     GrSafeSetNull(fInterface);
     83     fInfo.reset();
     84 }
     85 
     86 bool GrGLContext::initialize(const GrGLInterface* interface) {
     87     if (fInfo.initialize(interface)) {
     88         fInterface = interface;
     89         interface->ref();
     90         return true;
     91     }
     92     return false;
     93 }
     94