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https://github.com/luanti-org/luanti.git
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46db688cc8
note: feature detection was not implemented in the legacy driver, but the code itself probably works.
101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
// Copyright (C) 2017 Michael Zeilfelder
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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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#pragma once
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// Can be included from different ES versions
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// (this is also the reason why this file is header-only as correct OGL ES headers have to be included first)
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#include "irrMath.h"
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#include "COpenGLCoreFeature.h"
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namespace irr
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{
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namespace video
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{
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class COGLESCoreExtensionHandler
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{
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public:
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// Enums used internally to check for ES extensions quickly.
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// We buffer all extensions on start once in an array.
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// All OpenGL ES versions share the same extensions (WebGL adds it's own extensions on top of ES2)
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enum EOGLESFeatures
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{
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// If you update this enum also update the corresponding OGLESFeatureStrings string-array
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IRR_GL_APPLE_texture_format_BGRA8888,
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IRR_GL_EXT_blend_minmax,
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IRR_GL_EXT_texture_format_BGRA8888,
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IRR_GL_EXT_texture_rg,
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IRR_GL_OES_depth_texture,
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IRR_GL_OES_element_index_uint,
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IRR_GL_OES_packed_depth_stencil,
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IRR_GL_OES_texture_float,
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IRR_GL_OES_texture_half_float,
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IRR_OGLES_Feature_Count
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};
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COGLESCoreExtensionHandler() :
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MaxAnisotropy(1), MaxIndices(0xffff),
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MaxTextureSize(1), MaxArrayTextureLayers(1),
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MaxTextureLODBias(0.f), StencilBuffer(false)
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{
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for (u32 i = 0; i < IRR_OGLES_Feature_Count; ++i)
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FeatureAvailable[i] = false;
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DimAliasedLine[0] = 1.f;
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DimAliasedLine[1] = 1.f;
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DimAliasedPoint[0] = 1.f;
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DimAliasedPoint[1] = 1.f;
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}
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virtual ~COGLESCoreExtensionHandler() {}
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const COpenGLCoreFeature &getFeature() const
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{
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return Feature;
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}
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void dump() const
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{
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for (u32 i = 0; i < IRR_OGLES_Feature_Count; ++i)
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os::Printer::log(getFeatureString(i), FeatureAvailable[i] ? " true" : " false");
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}
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protected:
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const char *getFeatureString(size_t index) const
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{
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// One for each EOGLESFeatures
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static const char *const OGLESFeatureStrings[IRR_OGLES_Feature_Count] = {
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"GL_APPLE_texture_format_BGRA8888",
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"GL_EXT_blend_minmax",
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"GL_EXT_texture_format_BGRA8888",
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"GL_EXT_texture_rg",
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"GL_OES_depth_texture",
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"GL_OES_element_index_uint",
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"GL_OES_packed_depth_stencil",
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"GL_OES_texture_float",
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"GL_OES_texture_half_float",
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};
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return OGLESFeatureStrings[index];
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}
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COpenGLCoreFeature Feature;
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u8 MaxAnisotropy;
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u32 MaxIndices;
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u32 MaxTextureSize;
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u32 MaxArrayTextureLayers;
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f32 MaxTextureLODBias;
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//! Minimal and maximal supported thickness for lines without smoothing
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float DimAliasedLine[2];
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//! Minimal and maximal supported thickness for points without smoothing
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float DimAliasedPoint[2];
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bool StencilBuffer;
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bool FeatureAvailable[IRR_OGLES_Feature_Count];
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};
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}
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}
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