src/gpu/gl/GrGLContext.cpp


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/*
 * Copyright 2013 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "GrGLContext.h"

////////////////////////////////////////////////////////////////////////////////

GrGLContext* GrGLContext::Create(const GrGLInterface* interface) {
    // We haven't validated the GrGLInterface yet, so check for GetString function pointer
    if (!interface->fFunctions.fGetString) {
        return NULL;
    }
    ConstructorArgs args;
    args.fInterface = interface;

    const GrGLubyte* verUByte;
    GR_GL_CALL_RET(interface, verUByte, GetString(GR_GL_VERSION));
    const char* ver = reinterpret_cast<const char*>(verUByte);

    const GrGLubyte* rendererUByte;
    GR_GL_CALL_RET(interface, rendererUByte, GetString(GR_GL_RENDERER));
    const char* renderer = reinterpret_cast<const char*>(rendererUByte);

    if (!interface->validate()) {
        return NULL;
    }

    args.fGLVersion = GrGLGetVersionFromString(ver);
    if (GR_GL_INVALID_VER == args.fGLVersion) {
        return NULL;
    }

    if (!GrGetGLSLGeneration(interface, &args.fGLSLGeneration)) {
        return NULL;
    }

    args.fVendor = GrGLGetVendor(interface);

    /*
     * Qualcomm drivers have a horrendous bug with some drivers. Though they claim to
     * support GLES 3.00, some perfectly valid GLSL300 shaders will only compile with
     * #version 100, and will fail to compile with #version 300 es.  In the long term, we
     * need to lock this down to a specific driver version.
     */
    if (kQualcomm_GrGLVendor == args.fVendor) {
        args.fGLSLGeneration = k110_GrGLSLGeneration;
    }

    args.fRenderer = GrGLGetRendererFromString(renderer);

    args.fIsMesa = GrGLIsMesaFromVersionString(ver);

    args.fIsChromium = GrGLIsChromiumFromRendererString(renderer);
    return SkNEW_ARGS(GrGLContext, (args));
}

GrGLContextInfo::GrGLContextInfo(const ConstructorArgs& args) {
    fInterface.reset(SkRef(args.fInterface));
    fGLVersion = args.fGLVersion;
    fGLSLGeneration = args.fGLSLGeneration;
    fVendor = args.fVendor;
    fRenderer = args.fRenderer;
    fIsMesa = args.fIsMesa;
    fIsChromium = args.fIsChromium;

    fGLCaps.reset(SkNEW_ARGS(GrGLCaps, (*this, fInterface)));
}