💿🐜 Antkeeper source code
https://antkeeper.com
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154 lines
4.2 KiB
154 lines
4.2 KiB
/*
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* Copyright (C) 2017-2019 Christopher J. Howard
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*
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* This file is part of Antkeeper Source Code.
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*
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* Antkeeper Source Code 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 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper Source Code 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 Antkeeper Source Code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "silhouette-render-pass.hpp"
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#include "resources/resource-manager.hpp"
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SilhouetteRenderPass::SilhouetteRenderPass(ResourceManager* resourceManager):
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resourceManager(resourceManager),
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shader(nullptr)
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{}
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bool SilhouetteRenderPass::load(const RenderContext* renderContext)
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{
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// Load shader
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shader = resourceManager->load<Shader>("silhouette.glsl");
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// Setup permutation values
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unskinnedPermutation = 0;
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skinnedPermutation = 1;
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// Generate unskinned and skinned permutations
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if (!shader->generatePermutation(unskinnedPermutation) || !shader->generatePermutation(skinnedPermutation))
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{
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std::cerr << std::string("SilhouetteRenderPass: failed to generate shader permutation.") << std::endl;
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return false;
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}
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maxBoneCount = 64;
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matrixPaletteParam = new ShaderMatrix4(maxBoneCount);
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// Connect shader parameters
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matrixPaletteParam->connect(shader->getInput("matrixPalette"));
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modelViewProjectionMatrixParam.connect(shader->getInput("modelViewProjectionMatrix"));
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return true;
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}
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void SilhouetteRenderPass::unload()
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{
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// Disconnect shader parameters
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matrixPaletteParam->disconnect();
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modelViewProjectionMatrixParam.disconnect();
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delete matrixPaletteParam;
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// Delete shader permutations
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shader->deleteAllPermutations();
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}
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void SilhouetteRenderPass::render(RenderContext* renderContext)
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{
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const Camera& camera = *(renderContext->camera);
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// Bind framebuffer and setup viewport
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glBindFramebuffer(GL_FRAMEBUFFER, renderTarget->framebuffer);
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glViewport(0, 0, renderTarget->width, renderTarget->height);
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// Disable depth testing and writing
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glDisable(GL_DEPTH_TEST);
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glDepthMask(GL_FALSE);
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// Disable backface culling
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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// Disable alpha blending
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glDisable(GL_BLEND);
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// Get view-projection matrix
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const Matrix4& viewProjection = renderContext->camera->getViewProjectionTween()->getSubstate();
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// Filter render operations
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std::list<RenderOperation> operations;
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for (const RenderOperation& operation: *renderContext->queue->getOperations())
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{
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// Only use operations with the outline material.
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if (operation.material != nullptr)
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{
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if (operation.material->getFlags() & 256)
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{
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operations.push_back(operation);
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}
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}
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}
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// Sort render operations
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operations.sort(RenderOpCompare());
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std::uint32_t permutation = 0xDEADBEEF;
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GLuint boundVAO = 0;
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for (const RenderOperation& operation: operations)
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{
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std::uint32_t targetPermutation = (operation.pose != nullptr) ? skinnedPermutation : unskinnedPermutation;
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if (permutation != targetPermutation)
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{
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permutation = targetPermutation;
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shader->activate(permutation);
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}
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Matrix4 modelViewProjectionMatrix = viewProjection * operation.transform;
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modelViewProjectionMatrixParam.setValue(modelViewProjectionMatrix);
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modelViewProjectionMatrixParam.upload();
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// Pass matrix palette
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if (operation.pose != nullptr)
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{
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matrixPaletteParam->getConnectedInput()->upload(0, operation.pose->getMatrixPalette(), operation.pose->getSkeleton()->getBoneCount());
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}
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if (boundVAO != operation.vao)
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{
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glBindVertexArray(operation.vao);
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boundVAO = operation.vao;
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}
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glDrawElementsBaseVertex(GL_TRIANGLES, operation.triangleCount * 3, GL_UNSIGNED_INT, (void*)0, operation.indexOffset);
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}
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}
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bool SilhouetteRenderPass::RenderOpCompare::operator()(const RenderOperation& opA, const RenderOperation& opB) const
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{
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if (opA.pose)
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{
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if (opB.pose)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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}
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