initial commit
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Confideo-IOM
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#include "HydraDeferredPipeline.h"
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#include "HydraRenderStage.h"
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#include "../engine/HydraEngine.h"
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#include "../buffer/HydraBufferManager.h"
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#include "../buffer/HydraTextureBufferManager.h"
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#include "../buffer/HydraLightBufferManager.h"
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#include "PerFrameUBO.hpp"
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#include "../camera/HydraCamera.h"
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#include "../renderer/HydraRenderer.h"
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#include "../ecs/HydraECS.h"
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#include "../ecs/systems/HydraRenderSystem.h"
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#include "../mesh/StandardVertex.h"
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#include "../actor/HydraActorManager.h"
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#include "../actor/HydraOutputActor.h"
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void HydraDeferredPipeline::Initialise()
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{
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_CreateUBOs();
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//already on the render thread so dont neet another job
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_CreateOutputActor();
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_CreateFrameBuffer();
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_CreateColourRenderStage();
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_CreateOutputRenderStage();
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}
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void HydraDeferredPipeline::Shutdown()
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{
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for(uint32_t rs_idx =0; rs_idx <m_render_stages.size(); rs_idx++)
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{
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m_render_stages[rs_idx]->ShutDown();
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delete m_render_stages[rs_idx];
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}
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glDeleteFramebuffers(1, &m_frame_buffer_id);
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}
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void HydraDeferredPipeline::Render()
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{
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_UpdateUBO();
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glBindFramebuffer(GL_FRAMEBUFFER, m_frame_buffer_id);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // we're not using the stencil buffer now
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glEnable(GL_DEPTH_TEST);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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HydraECS* ecs = GetEngine()->ECS();
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std::shared_ptr<HydraRenderSystem> render_system = ecs->GetSystem<HydraRenderSystem>();
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GetEngine()->Renderer()->BeginFrame();
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for(uint32_t rs_idx = 0; rs_idx <m_render_stages.size(); rs_idx++)
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{
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m_render_stages[rs_idx]->Render(render_system->Entities);
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}
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GetEngine()->Renderer()->EndFrame();
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}
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void HydraDeferredPipeline::_UpdateUBO()
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{
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HydraCamera* camera = GetEngine()->Camera();
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PerFrameUBO ubo = {};
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uint32_t light_count = GetEngine()->GetLightCount();
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ubo.view = camera->GetView();
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ubo.proj = camera->GetProjection();
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ubo.viewer_pos = camera->GetPosition();
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ubo.light_count = light_count;
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HydraBufferManager* buffer_manager = GetEngine()->BufferManager();
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buffer_manager->UpdateWholeBuffer(m_per_frame_ubo, &ubo);
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glBindBuffer(GL_UNIFORM_BUFFER, m_per_frame_ubo);
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PerFrameUBO output_ubo = {};
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output_ubo.view = glm::mat4(1);
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output_ubo.proj = glm::ortho(-0.5f, 0.5f, -0.5f, 0.5f);
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output_ubo.viewer_pos = camera->GetPosition();
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output_ubo.light_count = light_count;
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buffer_manager->UpdateWholeBuffer(m_per_frame_output_ubo, &output_ubo);
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glBindBuffer(GL_UNIFORM_BUFFER, m_per_frame_output_ubo);
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}
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void HydraDeferredPipeline::_CreateFrameBuffer()
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{
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HydraEngine* engine = GetEngine();
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HydraTextureBufferManager* tex_buffer_manager = engine->TextureBufferManager();
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HydraRenderSettings render_settings = engine->RenderSettings();
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glGenFramebuffers(1, &m_frame_buffer_id);
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glBindFramebuffer(GL_FRAMEBUFFER, m_frame_buffer_id);
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HydraOutputActor* actor = static_cast<HydraOutputActor*>(GetEngine()->ActorManager()->GetActor(m_output_actor_id));
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HydraTextureBuffer depth_texture = tex_buffer_manager->GetTexture(actor->texture_buffers[0]);
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HydraTextureBuffer buffer_0_texture = tex_buffer_manager->GetTexture(actor->texture_buffers[1]);
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HydraTextureBuffer metal_rough_texture = tex_buffer_manager->GetTexture(actor->texture_buffers[2]);
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HydraTextureBuffer normal_texture = tex_buffer_manager->GetTexture(actor->texture_buffers[3]);
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HydraTextureBuffer position_texture = tex_buffer_manager->GetTexture(actor->texture_buffers[4]);
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glBindTexture(GL_TEXTURE_2D, buffer_0_texture.gl_tex_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, buffer_0_texture.gl_tex_id, 0);
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glBindTexture(GL_TEXTURE_2D, metal_rough_texture.gl_tex_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, metal_rough_texture.gl_tex_id, 0);
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glBindTexture(GL_TEXTURE_2D, normal_texture.gl_tex_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, normal_texture.gl_tex_id, 0);
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glBindTexture(GL_TEXTURE_2D, position_texture.gl_tex_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, position_texture.gl_tex_id, 0);
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glBindTexture(GL_TEXTURE_2D, depth_texture.gl_tex_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depth_texture.gl_tex_id, 0);
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GLenum draw_buffers[4] = {GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2, GL_COLOR_ATTACHMENT3};
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glDrawBuffers(4, draw_buffers);
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glBindTexture(GL_TEXTURE_2D, 0);
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tex_buffer_manager->BindTexture(depth_texture.texture_id);
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tex_buffer_manager->BindTexture(buffer_0_texture.texture_id);
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tex_buffer_manager->BindTexture(metal_rough_texture.texture_id);
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tex_buffer_manager->BindTexture(normal_texture.texture_id);
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tex_buffer_manager->BindTexture(position_texture.texture_id);
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HydraBufferManager* buffer_manager = GetEngine()->BufferManager();
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buffer_manager->UpdateWholeBuffer(m_output_texture_ubo, &actor->texture_buffers[0]);
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glBindBuffer(GL_UNIFORM_BUFFER, m_output_texture_ubo);
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}
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void HydraDeferredPipeline::_CreateColourRenderStage()
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{
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HydraRenderStage* render_stage = new HydraRenderStage();
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std::string shader_path = std::string(shader_base);
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HydraBufferManager* buffer_manager = GetEngine()->BufferManager();
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HydraID pos_buffer_id = buffer_manager->FindBuffer("PositionsBuffer");
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HydraID mat_buffer_id = buffer_manager->FindBuffer("MaterialBuffer");
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HydraID tex_buffer_id = buffer_manager->FindBuffer("TextureBuffer");
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HydraID per_frame_buffer_id = buffer_manager->FindBuffer("DeferredPerFrameUBO");
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HydraShaderBinding shader_binding = {};
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shader_binding.block_name.push_back("PositionsBuffer");
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shader_binding.binding_point.push_back(1);
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shader_binding.buffer_id.push_back(pos_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_SSBO_BUFFER);
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shader_binding.block_name.push_back("MaterialBuffer");
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shader_binding.binding_point.push_back(2);
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shader_binding.buffer_id.push_back(mat_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_SSBO_BUFFER);
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shader_binding.block_name.push_back("TextureBuffer");
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shader_binding.binding_point.push_back(3);
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shader_binding.buffer_id.push_back(tex_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_SSBO_BUFFER);
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shader_binding.block_name.push_back("uniform_per_frame");
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shader_binding.binding_point.push_back(0);
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shader_binding.buffer_id.push_back(per_frame_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_UBO_BUFFER);
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std::vector<uint32_t> textures;
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render_stage->Initialise(shader_path + "deferred_shader.vert",
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shader_path + "deferred_shader.frag",
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shader_binding,
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m_frame_buffer_id,
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textures,
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true,
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HYDRA_RENDERABLE_TYPE::HYDRA_COLOUR);
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m_render_stages.push_back(render_stage);
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}
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void HydraDeferredPipeline::_CreateOutputRenderStage()
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{
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HydraRenderStage* render_stage = new HydraRenderStage();
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std::string shader_path = std::string(shader_base);
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HydraBufferManager* buffer_manager = GetEngine()->BufferManager();
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std::vector<uint32_t> textures;
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GetEngine()->ActorManager()->InitialiseActor(m_output_actor_id);
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HydraOutputActor* actor = static_cast<HydraOutputActor*>(GetEngine()->ActorManager()->GetActor(m_output_actor_id));
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HydraTextureBufferManager* tex_buf_manager = GetEngine()->TextureBufferManager();
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HydraID pos_buffer_id = buffer_manager->FindBuffer("PositionsBuffer");
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HydraID per_frame_buffer_id = buffer_manager->FindBuffer("DeferredOutputPerFrameUBO");
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HydraID tex_buffer_id = buffer_manager->FindBuffer("TextureBuffer");
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HydraID output_texture_buffer_id = buffer_manager->FindBuffer("DeferredOutputTextureUBO");
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HydraID light_buffer_id = buffer_manager->FindBuffer("LightBuffer");
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HydraShaderBinding shader_binding = {};
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shader_binding.block_name.push_back("PositionsBuffer");
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shader_binding.binding_point.push_back(1);
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shader_binding.buffer_id.push_back(pos_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_SSBO_BUFFER);
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shader_binding.block_name.push_back("TextureBuffer");
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shader_binding.binding_point.push_back(3);
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shader_binding.buffer_id.push_back(tex_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_SSBO_BUFFER);
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shader_binding.block_name.push_back("uniform_per_frame");
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shader_binding.binding_point.push_back(0);
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shader_binding.buffer_id.push_back(per_frame_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_UBO_BUFFER);
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shader_binding.block_name.push_back("uniform_output_textures");
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shader_binding.binding_point.push_back(1);
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shader_binding.buffer_id.push_back(output_texture_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_UBO_BUFFER);
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shader_binding.block_name.push_back("LightBuffer");
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shader_binding.binding_point.push_back(4);
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shader_binding.buffer_id.push_back(light_buffer_id);
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shader_binding.buffer_type.push_back(HYDRA_BUFFER_TYPE::HYDRA_SSBO_BUFFER);
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render_stage->Initialise(shader_path + "deferred_output_shader.vert",
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shader_path + "deferred_output_shader.frag",
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shader_binding,
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0,
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textures,
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false,
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HYDRA_RENDERABLE_TYPE::HYDRA_OUTPUT);
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m_render_stages.push_back(render_stage);
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}
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void HydraDeferredPipeline::_CreateOutputActor()
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{
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m_output_actor_id = GetEngine()->ActorManager()->CreateActor<HydraOutputActor>();
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GetEngine()->ActorManager()->InitialiseActor(m_output_actor_id);
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HydraOutputActor* actor = static_cast<HydraOutputActor*>(GetEngine()->ActorManager()->GetActor(m_output_actor_id));
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}
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void HydraDeferredPipeline::_CreateUBOs()
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{
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HydraBufferManager* buffer_manager = GetEngine()->BufferManager();
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m_per_frame_ubo = buffer_manager->CreateGPUBuffer("DeferredPerFrameUBO",
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sizeof(PerFrameUBO), 0, HYDRA_BUFFER_TYPE::HYDRA_UBO_BUFFER);
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m_per_frame_output_ubo = buffer_manager->CreateGPUBuffer("DeferredOutputPerFrameUBO",
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sizeof(PerFrameUBO), 0, HYDRA_BUFFER_TYPE::HYDRA_UBO_BUFFER);
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m_output_texture_ubo = buffer_manager->CreateGPUBuffer("DeferredOutputTextureUBO",
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sizeof(uint32_t)*16, 0, HYDRA_BUFFER_TYPE::HYDRA_UBO_BUFFER);
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}
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