Graphics/ForwardRenderTechnique: Optimize sprite rendering
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Lynix
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056bd0efdd
commit
e9f0bdeb25
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@ -83,9 +83,17 @@ namespace Nz
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int textureOverlay;
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};
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struct SpriteBatch
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{
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std::size_t spriteCount;
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const Material* material;
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const Texture* overlayTexture;
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Recti scissorRect;
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};
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mutable std::unordered_map<const Shader*, ShaderUniforms> m_shaderUniforms;
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mutable std::vector<LightIndex> m_lights;
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mutable std::vector<std::pair<const VertexStruct_XYZ_Color_UV*, std::size_t>> m_spriteChains;
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mutable std::vector<SpriteBatch> m_spriteBatches;
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Buffer m_vertexBuffer;
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mutable BasicRenderQueue m_renderQueue;
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TextureRef m_whiteCubemap;
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@ -618,61 +618,51 @@ namespace Nz
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const RenderTarget* renderTarget = sceneData.viewer->GetTarget();
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Recti fullscreenScissorRect = Recti(Vector2i(renderTarget->GetSize()));
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Renderer::SetIndexBuffer(&s_quadIndexBuffer);
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Renderer::SetMatrix(MatrixType_World, Matrix4f::Identity());
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Renderer::SetVertexBuffer(&m_spriteBuffer);
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const unsigned int overlayTextureUnit = Material::GetTextureUnit(TextureMap_Overlay);
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const std::size_t maxSpriteCount = std::min<std::size_t>(s_maxQuads, m_spriteBuffer.GetVertexCount() / 4);
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m_spriteChains.clear();
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auto Commit = [&]()
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m_spriteBatches.clear();
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{
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std::size_t spriteChainCount = m_spriteChains.size();
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if (spriteChainCount > 0)
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BufferMapper<VertexBuffer> vertexMapper(m_spriteBuffer, BufferAccess_DiscardAndWrite);
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VertexStruct_XYZ_Color_UV* vertices = static_cast<VertexStruct_XYZ_Color_UV*>(vertexMapper.GetPointer());
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std::size_t remainingSprite = maxSpriteCount;
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const Material* lastMaterial = nullptr;
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const Texture* lastOverlay = nullptr;
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Recti lastScissorRect = Recti(-1, -1);
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for (const BasicRenderQueue::SpriteChain& basicSprites : spriteList)
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{
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std::size_t spriteChain = 0; // Which chain of sprites are we treating
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std::size_t spriteChainOffset = 0; // Where was the last offset where we stopped in the last chain
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do
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const Nz::Texture* overlayTexture = (basicSprites.overlay) ? basicSprites.overlay.Get() : m_whiteTexture.Get();
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const Nz::Recti& scissorRect = (basicSprites.scissorRect.width > 0) ? basicSprites.scissorRect : fullscreenScissorRect;
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if (basicSprites.material != lastMaterial || overlayTexture != lastOverlay || (basicSprites.material->IsScissorTestEnabled() && scissorRect != lastScissorRect))
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{
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// We open the buffer in writing mode
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BufferMapper<VertexBuffer> vertexMapper(m_spriteBuffer, BufferAccess_DiscardAndWrite);
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VertexStruct_XYZ_Color_UV* vertices = static_cast<VertexStruct_XYZ_Color_UV*>(vertexMapper.GetPointer());
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m_spriteBatches.emplace_back();
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SpriteBatch& newBatch = m_spriteBatches.back();
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newBatch.material = basicSprites.material;
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newBatch.overlayTexture = overlayTexture;
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newBatch.scissorRect = scissorRect;
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newBatch.spriteCount = 0;
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std::size_t spriteCount = 0;
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do
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{
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const VertexStruct_XYZ_Color_UV* currentChain = m_spriteChains[spriteChain].first;
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std::size_t currentChainSpriteCount = m_spriteChains[spriteChain].second;
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std::size_t count = std::min(maxSpriteCount - spriteCount, currentChainSpriteCount - spriteChainOffset);
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std::memcpy(vertices, currentChain + spriteChainOffset * 4, 4 * count * sizeof(VertexStruct_XYZ_Color_UV));
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vertices += count * 4;
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spriteCount += count;
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spriteChainOffset += count;
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// Have we treated the entire chain ?
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if (spriteChainOffset == currentChainSpriteCount)
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{
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spriteChain++;
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spriteChainOffset = 0;
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}
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}
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while (spriteCount < maxSpriteCount && spriteChain < spriteChainCount);
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vertexMapper.Unmap();
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Renderer::DrawIndexedPrimitives(PrimitiveMode_TriangleList, 0, spriteCount * 6);
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lastMaterial = basicSprites.material;
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lastOverlay = overlayTexture;
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lastScissorRect = scissorRect;
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}
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while (spriteChain < spriteChainCount);
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}
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m_spriteChains.clear();
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};
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SpriteBatch& currentBatch = m_spriteBatches.back();
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std::size_t spriteCount = std::min(remainingSprite, basicSprites.spriteCount);
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std::memcpy(vertices, basicSprites.vertices, spriteCount * 4 * sizeof(VertexStruct_XYZ_Color_UV));
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vertices += spriteCount * 4;
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currentBatch.spriteCount += spriteCount;
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remainingSprite -= spriteCount;
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if (remainingSprite == 0)
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break;
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}
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}
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const Material* lastMaterial = nullptr;
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const MaterialPipeline* lastPipeline = nullptr;
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@ -683,66 +673,63 @@ namespace Nz
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const MaterialPipeline::Instance* pipelineInstance = nullptr;
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for (const BasicRenderQueue::SpriteChain& basicSprites : spriteList)
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Renderer::SetIndexBuffer(&s_quadIndexBuffer);
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Renderer::SetMatrix(MatrixType_World, Matrix4f::Identity());
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Renderer::SetVertexBuffer(&m_spriteBuffer);
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unsigned int firstIndex = 0;
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for (const auto& batch : m_spriteBatches)
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{
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const Nz::Recti& scissorRect = (basicSprites.scissorRect.width > 0) ? basicSprites.scissorRect : fullscreenScissorRect;
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if (basicSprites.material != lastMaterial || basicSprites.overlay != lastOverlay || (basicSprites.material->IsScissorTestEnabled() && scissorRect != lastScissorRect))
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const MaterialPipeline* pipeline = batch.material->GetPipeline();
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if (pipeline != lastPipeline)
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{
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Commit();
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pipelineInstance = &batch.material->GetPipeline()->Apply(ShaderFlags_TextureOverlay | ShaderFlags_VertexColor);
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const MaterialPipeline* pipeline = basicSprites.material->GetPipeline();
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if (lastPipeline != pipeline)
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const Shader* shader = pipelineInstance->uberInstance->GetShader();
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if (shader != lastShader)
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{
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pipelineInstance = &basicSprites.material->GetPipeline()->Apply(ShaderFlags_TextureOverlay | ShaderFlags_VertexColor);
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// Index of uniforms in the shader
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shaderUniforms = GetShaderUniforms(shader);
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const Shader* shader = pipelineInstance->uberInstance->GetShader();
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if (shader != lastShader)
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{
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// Index of uniforms in the shader
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shaderUniforms = GetShaderUniforms(shader);
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// Ambient color of the scene
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shader->SendColor(shaderUniforms->sceneAmbient, sceneData.ambientColor);
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// Position of the camera
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shader->SendVector(shaderUniforms->eyePosition, sceneData.viewer->GetEyePosition());
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// Ambient color of the scene
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shader->SendColor(shaderUniforms->sceneAmbient, sceneData.ambientColor);
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// Position of the camera
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shader->SendVector(shaderUniforms->eyePosition, sceneData.viewer->GetEyePosition());
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// Overlay texture unit
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shader->SendInteger(shaderUniforms->textureOverlay, overlayTextureUnit);
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// Overlay texture unit
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shader->SendInteger(shaderUniforms->textureOverlay, overlayTextureUnit);
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lastShader = shader;
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}
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lastPipeline = pipeline;
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lastShader = shader;
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}
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if (lastMaterial != basicSprites.material)
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{
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basicSprites.material->Apply(*pipelineInstance);
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Renderer::SetTextureSampler(overlayTextureUnit, basicSprites.material->GetDiffuseSampler());
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lastMaterial = basicSprites.material;
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}
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const Nz::Texture* overlayTexture = (basicSprites.overlay) ? basicSprites.overlay.Get() : m_whiteTexture.Get();
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if (overlayTexture != lastOverlay)
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{
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Renderer::SetTexture(overlayTextureUnit, overlayTexture);
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lastOverlay = overlayTexture;
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}
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if (basicSprites.material->IsScissorTestEnabled() && scissorRect != lastScissorRect)
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{
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Renderer::SetScissorRect(scissorRect);
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lastScissorRect = scissorRect;
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}
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lastPipeline = pipeline;
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}
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m_spriteChains.emplace_back(basicSprites.vertices, basicSprites.spriteCount);
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}
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if (batch.material != lastMaterial)
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{
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batch.material->Apply(*pipelineInstance);
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Commit();
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Renderer::SetTextureSampler(overlayTextureUnit, batch.material->GetDiffuseSampler());
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lastMaterial = batch.material;
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}
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if (batch.overlayTexture != lastOverlay)
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{
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Renderer::SetTexture(overlayTextureUnit, batch.overlayTexture);
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lastOverlay = batch.overlayTexture;
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}
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if (batch.material->IsScissorTestEnabled() && batch.scissorRect != lastScissorRect)
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{
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Renderer::SetScissorRect(batch.scissorRect);
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lastScissorRect = batch.scissorRect;
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}
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unsigned int indexCount = batch.spriteCount * 6;
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Renderer::DrawIndexedPrimitives(PrimitiveMode_TriangleList, firstIndex, indexCount);
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firstIndex += indexCount;
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}
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}
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const ForwardRenderTechnique::ShaderUniforms* ForwardRenderTechnique::GetShaderUniforms(const Shader* shader) const
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