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https://github.com/minetest/irrlicht.git
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65 lines
2.5 KiB
C++
65 lines
2.5 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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namespace irr {
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namespace video {
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E_DRIVER_TYPE COpenGLES2Driver::getDriverType() const {
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return EDT_OGLES2;
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}
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OpenGLVersion COpenGLES2Driver::getVersionFromOpenGL() const {
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auto version_string = reinterpret_cast<const char *>(glGetString(GL_VERSION));
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int major, minor;
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if (sscanf(version_string, "OpenGL ES %d.%d", &major, &minor) != 2) {
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os::Printer::log("Failed to parse OpenGL ES version string", version_string, ELL_ERROR);
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return {OpenGLSpec::ES, 0, 0, 0};
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}
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return {OpenGLSpec::ES, (u8)major, (u8)minor, 0};
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}
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void COpenGLES2Driver::initFeatures() {
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assert (Version.Spec == OpenGLSpec::ES);
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assert (Version.Major >= 2);
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if (Version.Major >= 3)
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initExtensionsNew();
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else
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initExtensionsOld();
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// COGLESCoreExtensionHandler::Feature
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static_assert(MATERIAL_MAX_TEXTURES <= 8, "Only up to 8 textures are guaranteed");
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Feature.BlendOperation = true;
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Feature.ColorAttachment = 1;
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if (Version.Major >= 3 || FeatureAvailable[IRR_GL_EXT_draw_buffers])
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Feature.ColorAttachment = GetInteger(GL_MAX_COLOR_ATTACHMENTS);
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Feature.MaxTextureUnits = MATERIAL_MAX_TEXTURES;
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if (Version.Major >= 3 || FeatureAvailable[IRR_GL_EXT_draw_buffers])
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Feature.MultipleRenderTarget = GetInteger(GL_MAX_DRAW_BUFFERS);
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// COGLESCoreExtensionHandler
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if (FeatureAvailable[IRR_GL_EXT_texture_filter_anisotropic])
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MaxAnisotropy = GetInteger(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT);
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if (Version.Major >= 3 || FeatureAvailable[IRR_GL_EXT_draw_range_elements])
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MaxIndices = GetInteger(GL_MAX_ELEMENTS_INDICES);
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MaxTextureSize = GetInteger(GL_MAX_TEXTURE_SIZE);
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if (FeatureAvailable[IRR_GL_EXT_texture_lod_bias])
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glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS, &MaxTextureLODBias);
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glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, DimAliasedLine); // NOTE: this is not in the OpenGL ES 2.0 spec...
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glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, DimAliasedPoint);
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}
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IVideoDriver* createOGLES2Driver(const SIrrlichtCreationParameters& params, io::IFileSystem* io, IContextManager* contextManager)
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{
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os::Printer::log("Using COpenGLES2Driver", ELL_INFORMATION);
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COpenGLES2Driver* driver = new COpenGLES2Driver(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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