305 lines
8.6 KiB
C++
305 lines
8.6 KiB
C++
/* Copyright (C) 2012 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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#include "precompiled.h"
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#include "lib/bits.h"
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#include "lib/ogl.h"
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#include "lib/sysdep/rtl.h"
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#include "maths/Vector3D.h"
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#include "graphics/Color.h"
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#include "graphics/LightEnv.h"
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#include "graphics/Model.h"
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#include "graphics/ModelDef.h"
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#include "renderer/HWLightingModelRenderer.h"
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#include "renderer/Renderer.h"
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#include "renderer/RenderModifiers.h"
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#include "renderer/VertexArray.h"
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struct ShaderModelDef : public CModelDefRPrivate
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{
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/// Indices are the same for all models, so share them
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VertexIndexArray m_IndexArray;
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/// Static per-CModelDef vertex array
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VertexArray m_Array;
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/// UV coordinates are stored in the static array
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VertexArray::Attribute m_UV;
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ShaderModelDef(const CModelDefPtr& mdef);
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};
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ShaderModelDef::ShaderModelDef(const CModelDefPtr& mdef)
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: m_IndexArray(GL_STATIC_DRAW), m_Array(GL_STATIC_DRAW)
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{
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size_t numVertices = mdef->GetNumVertices();
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m_UV.type = GL_FLOAT;
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m_UV.elems = 2;
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m_Array.AddAttribute(&m_UV);
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m_Array.SetNumVertices(numVertices);
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m_Array.Layout();
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VertexArrayIterator<float[2]> UVit = m_UV.GetIterator<float[2]>();
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ModelRenderer::BuildUV(mdef, UVit, 0);
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m_Array.Upload();
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m_Array.FreeBackingStore();
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m_IndexArray.SetNumVertices(mdef->GetNumFaces()*3);
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m_IndexArray.Layout();
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ModelRenderer::BuildIndices(mdef, m_IndexArray.GetIterator());
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m_IndexArray.Upload();
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m_IndexArray.FreeBackingStore();
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}
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struct ShaderModel : public CModelRData
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{
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/// Dynamic per-CModel vertex array
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VertexArray m_Array;
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/// Position and normals/lighting are recalculated on CPU every frame
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VertexArray::Attribute m_Position;
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VertexArray::Attribute m_Normal; // valid iff cpuLighting == false
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VertexArray::Attribute m_Color; // valid iff cpuLighting == true
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ShaderModel(const void* key) : CModelRData(key), m_Array(GL_DYNAMIC_DRAW) { }
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};
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struct ShaderModelRendererInternals
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{
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bool cpuLighting;
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/**
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* Scratch space for normal vector calculation.
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* Only used if cpuLighting == true.
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* Space is reserved so we don't have to do frequent reallocations.
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* Allocated with rtl_AllocateAligned(normalsNumVertices*16, 16) for SSE writes.
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*/
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char* normals;
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size_t normalsNumVertices;
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/// Previously prepared modeldef
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ShaderModelDef* shadermodeldef;
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};
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// Construction and Destruction
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ShaderModelVertexRenderer::ShaderModelVertexRenderer(bool cpuLighting)
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{
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m = new ShaderModelRendererInternals;
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m->cpuLighting = cpuLighting;
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m->normals = NULL;
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m->normalsNumVertices = 0;
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m->shadermodeldef = NULL;
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}
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ShaderModelVertexRenderer::~ShaderModelVertexRenderer()
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{
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rtl_FreeAligned(m->normals);
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delete m;
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}
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// Build model data (and modeldef data if necessary)
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CModelRData* ShaderModelVertexRenderer::CreateModelData(const void* key, CModel* model)
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{
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CModelDefPtr mdef = model->GetModelDef();
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ShaderModelDef* shadermodeldef = (ShaderModelDef*)mdef->GetRenderData(m);
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if (!shadermodeldef)
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{
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shadermodeldef = new ShaderModelDef(mdef);
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mdef->SetRenderData(m, shadermodeldef);
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}
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// Build the per-model data
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ShaderModel* shadermodel = new ShaderModel(key);
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if (m->cpuLighting)
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{
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// Positions must be 16-byte aligned for SSE writes.
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// We can pack the color after the position; it will be corrupted by
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// BuildPositionAndNormals, but that's okay since we'll recompute the
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// colors afterwards.
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shadermodel->m_Color.type = GL_UNSIGNED_BYTE;
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shadermodel->m_Color.elems = 4;
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shadermodel->m_Array.AddAttribute(&shadermodel->m_Color);
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shadermodel->m_Position.type = GL_FLOAT;
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shadermodel->m_Position.elems = 3;
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shadermodel->m_Array.AddAttribute(&shadermodel->m_Position);
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}
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else
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{
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// Positions and normals must be 16-byte aligned for SSE writes.
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shadermodel->m_Position.type = GL_FLOAT;
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shadermodel->m_Position.elems = 4;
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shadermodel->m_Array.AddAttribute(&shadermodel->m_Position);
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shadermodel->m_Normal.type = GL_FLOAT;
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shadermodel->m_Normal.elems = 4;
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shadermodel->m_Array.AddAttribute(&shadermodel->m_Normal);
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}
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shadermodel->m_Array.SetNumVertices(mdef->GetNumVertices());
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shadermodel->m_Array.Layout();
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// Verify alignment
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ENSURE(shadermodel->m_Position.offset % 16 == 0);
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if (!m->cpuLighting)
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ENSURE(shadermodel->m_Normal.offset % 16 == 0);
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ENSURE(shadermodel->m_Array.GetStride() % 16 == 0);
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return shadermodel;
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}
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// Fill in and upload dynamic vertex array
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void ShaderModelVertexRenderer::UpdateModelData(CModel* model, CModelRData* data, int updateflags)
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{
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ShaderModel* shadermodel = static_cast<ShaderModel*>(data);
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if (!m->cpuLighting && (updateflags & RENDERDATA_UPDATE_VERTICES))
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{
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// build vertices
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VertexArrayIterator<CVector3D> Position = shadermodel->m_Position.GetIterator<CVector3D>();
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VertexArrayIterator<CVector3D> Normal = shadermodel->m_Normal.GetIterator<CVector3D>();
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ModelRenderer::BuildPositionAndNormals(model, Position, Normal);
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// upload everything to vertex buffer
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shadermodel->m_Array.Upload();
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}
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if (m->cpuLighting && (updateflags & (RENDERDATA_UPDATE_VERTICES|RENDERDATA_UPDATE_COLOR)))
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{
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CModelDefPtr mdef = model->GetModelDef();
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size_t numVertices = mdef->GetNumVertices();
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// allocate working space for computing normals
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if (numVertices > m->normalsNumVertices)
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{
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rtl_FreeAligned(m->normals);
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size_t newSize = round_up_to_pow2(numVertices);
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m->normals = (char*)rtl_AllocateAligned(newSize*16, 16);
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m->normalsNumVertices = newSize;
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}
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VertexArrayIterator<CVector3D> Position = shadermodel->m_Position.GetIterator<CVector3D>();
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VertexArrayIterator<CVector3D> Normal = VertexArrayIterator<CVector3D>(m->normals, 16);
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ModelRenderer::BuildPositionAndNormals(model, Position, Normal);
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VertexArrayIterator<SColor4ub> Color = shadermodel->m_Color.GetIterator<SColor4ub>();
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ModelRenderer::BuildColor4ub(model, Normal, Color);
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// upload everything to vertex buffer
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shadermodel->m_Array.Upload();
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}
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}
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// Setup one rendering pass
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void ShaderModelVertexRenderer::BeginPass(int streamflags)
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{
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if (m->cpuLighting)
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ENSURE(streamflags == (streamflags & (STREAM_POS | STREAM_UV0 | STREAM_UV1 | STREAM_COLOR)));
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else
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ENSURE(streamflags == (streamflags & (STREAM_POS | STREAM_UV0 | STREAM_UV1 | STREAM_NORMAL)));
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}
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// Cleanup one rendering pass
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void ShaderModelVertexRenderer::EndPass(int UNUSED(streamflags))
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{
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CVertexBuffer::Unbind();
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}
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// Prepare UV coordinates for this modeldef
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void ShaderModelVertexRenderer::PrepareModelDef(const CShaderProgramPtr& shader, int streamflags, const CModelDef& def)
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{
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m->shadermodeldef = (ShaderModelDef*)def.GetRenderData(m);
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ENSURE(m->shadermodeldef);
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if (streamflags & STREAM_UV0)
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{
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u8* base = m->shadermodeldef->m_Array.Bind();
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GLsizei stride = (GLsizei)m->shadermodeldef->m_Array.GetStride();
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shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, stride, base + m->shadermodeldef->m_UV.offset);
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}
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}
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// Render one model
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void ShaderModelVertexRenderer::RenderModel(const CShaderProgramPtr& shader, int streamflags, CModel* model, CModelRData* data)
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{
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CModelDefPtr mdldef = model->GetModelDef();
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ShaderModel* shadermodel = static_cast<ShaderModel*>(data);
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u8* base = shadermodel->m_Array.Bind();
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GLsizei stride = (GLsizei)shadermodel->m_Array.GetStride();
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u8* indexBase = m->shadermodeldef->m_IndexArray.Bind();
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if (streamflags & STREAM_POS)
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shader->VertexPointer(3, GL_FLOAT, stride, base + shadermodel->m_Position.offset);
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if (streamflags & STREAM_NORMAL)
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shader->NormalPointer(GL_FLOAT, stride, base + shadermodel->m_Normal.offset);
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if (streamflags & STREAM_COLOR)
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shader->ColorPointer(3, GL_UNSIGNED_BYTE, stride, base + shadermodel->m_Color.offset);
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shader->AssertPointersBound();
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// render the lot
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size_t numFaces = mdldef->GetNumFaces();
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if (!g_Renderer.m_SkipSubmit)
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{
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// Draw with DrawRangeElements where available, since it might be more efficient
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#if CONFIG2_GLES
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glDrawElements(GL_TRIANGLES, (GLsizei)numFaces*3, GL_UNSIGNED_SHORT, indexBase);
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#else
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pglDrawRangeElementsEXT(GL_TRIANGLES, 0, (GLuint)mdldef->GetNumVertices()-1,
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(GLsizei)numFaces*3, GL_UNSIGNED_SHORT, indexBase);
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#endif
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}
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// bump stats
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g_Renderer.m_Stats.m_DrawCalls++;
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g_Renderer.m_Stats.m_ModelTris += numFaces;
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}
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