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67 lines
2.6 KiB
C++
67 lines
2.6 KiB
C++
// Copyright (C) 2023 Vitaliy Lobachevskiy
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in Irrlicht.h
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#include "Driver.h"
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#include <cassert>
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#include "mt_opengl.h"
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namespace irr {
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namespace video {
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E_DRIVER_TYPE COpenGL3Driver::getDriverType() const {
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return EDT_OPENGL3;
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}
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OpenGLVersion COpenGL3Driver::getVersionFromOpenGL() const {
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GLint major, minor, profile;
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glGetIntegerv(GL_MAJOR_VERSION, &major);
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glGetIntegerv(GL_MINOR_VERSION, &minor);
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glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &profile);
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// The spec is clear a context can’t be both core and compatibility at the same time.
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// However, the returned value is a mask. Ask Khronos why. -- numzero
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if (profile & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT)
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return {OpenGLSpec::Compat, (u8)major, (u8)minor, 0};
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if (profile & GL_CONTEXT_CORE_PROFILE_BIT)
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return {OpenGLSpec::Core, (u8)major, (u8)minor, 0};
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os::Printer::log("Got unrecognized OpenGL profile", ELL_ERROR);
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return {OpenGLSpec::Core, (u8)major, (u8)minor, 0};
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}
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void COpenGL3Driver::initFeatures() {
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assert (Version.Spec == OpenGLSpec::Compat);
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assert (isVersionAtLeast(3, 2));
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initExtensionsNew();
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AnisotropicFilterSupported = isVersionAtLeast(4, 6) || queryExtension("GL_ARB_texture_filter_anisotropic") || queryExtension("GL_EXT_texture_filter_anisotropic");
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BlendMinMaxSupported = true;
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// COGLESCoreExtensionHandler::Feature
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static_assert(MATERIAL_MAX_TEXTURES <= 16, "Only up to 16 textures are guaranteed");
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Feature.BlendOperation = true;
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Feature.ColorAttachment = GetInteger(GL_MAX_COLOR_ATTACHMENTS);
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Feature.MaxTextureUnits = MATERIAL_MAX_TEXTURES;
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Feature.MultipleRenderTarget = GetInteger(GL_MAX_DRAW_BUFFERS);
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// COGLESCoreExtensionHandler
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if (AnisotropicFilterSupported)
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MaxAnisotropy = GetInteger(GL.MAX_TEXTURE_MAX_ANISOTROPY);
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MaxIndices = GetInteger(GL_MAX_ELEMENTS_INDICES);
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MaxTextureSize = GetInteger(GL_MAX_TEXTURE_SIZE);
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glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS, &MaxTextureLODBias);
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glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, DimAliasedLine);
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DimAliasedPoint[0] = 1.0f;
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DimAliasedPoint[1] = 1.0f;
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}
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IVideoDriver* createOpenGL3Driver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, IContextManager* contextManager)
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{
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os::Printer::log("Using COpenGL3Driver", ELL_INFORMATION);
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COpenGL3Driver* driver = new COpenGL3Driver(params, io, contextManager);
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driver->genericDriverInit(params.WindowSize, params.Stencilbuffer); // don't call in constructor, it uses virtual function calls of driver
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return driver;
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}
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}
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}
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