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https://gitea.wildfiregames.com/0ad/0ad
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157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
118 lines
3.7 KiB
C++
118 lines
3.7 KiB
C++
/* Copyright (C) 2023 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_LOSTEXTURE
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#define INCLUDED_LOSTEXTURE
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#include "graphics/ShaderTechniquePtr.h"
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#include "maths/Matrix3D.h"
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#include "renderer/backend/Format.h"
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#include "renderer/backend/IDeviceCommandContext.h"
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#include "renderer/backend/IFramebuffer.h"
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#include "renderer/backend/IShaderProgram.h"
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#include "renderer/backend/ITexture.h"
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#include <memory>
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class CLosQuerier;
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class CSimulation2;
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/**
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* Maintains the LOS (fog-of-war / shroud-of-darkness) texture, used for
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* rendering and for the minimap.
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*/
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class CLOSTexture
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{
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NONCOPYABLE(CLOSTexture);
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friend class TestLOSTexture;
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public:
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CLOSTexture(CSimulation2& simulation);
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~CLOSTexture();
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/**
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* Marks the LOS texture as needing recomputation. Call this after each
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* simulation update, to ensure responsive updates.
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*/
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void MakeDirty();
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/**
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* Recomputes the LOS texture if necessary, and returns the texture handle.
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* Also potentially switches the current active texture unit, and enables texturing on it.
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* The texture is in 8-bit ALPHA format.
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*/
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Renderer::Backend::ITexture* GetTexture();
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Renderer::Backend::ITexture* GetTextureSmooth();
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void InterpolateLOS(Renderer::Backend::IDeviceCommandContext* deviceCommandContext);
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/**
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* Returns a matrix to map (x,y,z) world coordinates onto (u,v) LOS texture
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* coordinates, in the form expected by a matrix uniform.
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* This must only be called after InterpolateLOS.
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*/
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const CMatrix3D& GetTextureMatrix();
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/**
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* Returns a matrix to map (0,0)-(1,1) texture coordinates onto LOS texture
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* coordinates, in the form expected by a matrix uniform.
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* This must only be called after InterpolateLOS.
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*/
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const CMatrix3D& GetMinimapTextureMatrix();
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private:
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void DeleteTexture();
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bool CreateShader();
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void ConstructTexture(Renderer::Backend::IDeviceCommandContext* deviceCommandContext);
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void RecomputeTexture(Renderer::Backend::IDeviceCommandContext* deviceCommandContext);
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size_t GetBitmapSize(size_t w, size_t h, size_t* pitch);
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void GenerateBitmap(const CLosQuerier& los, u8* losData, size_t w, size_t h, size_t pitch);
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CSimulation2& m_Simulation;
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bool m_Dirty = true;
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bool m_ShaderInitialized = false;
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// We need to choose the smallest format. We always use the red channel but
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// R8_UNORM might be unavailable on some platforms. So we fallback to
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// R8G8B8A8_UNORM.
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Renderer::Backend::Format m_TextureFormat =
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Renderer::Backend::Format::UNDEFINED;
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size_t m_TextureFormatStride = 0;
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std::unique_ptr<Renderer::Backend::ITexture>
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m_Texture, m_SmoothTextures[2];
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Renderer::Backend::IVertexInputLayout* m_VertexInputLayout = nullptr;
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uint32_t m_WhichTexture = 0;
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double m_LastTextureRecomputeTime = 0.0;
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// We update textures once a frame, so we change a Framebuffer once a frame.
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// That allows us to use two ping-pong FBOs instead of checking completeness
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// of Framebuffer each frame.
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std::unique_ptr<Renderer::Backend::IFramebuffer>
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m_SmoothFramebuffers[2];
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CShaderTechniquePtr m_SmoothTech;
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size_t m_MapSize = 0; // vertexes per side
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CMatrix3D m_TextureMatrix;
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CMatrix3D m_MinimapTextureMatrix;
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};
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#endif // INCLUDED_LOSTEXTURE
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