63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
#include "Canvas.h"
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#include "EngineCore/Game.h"
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#include "EngineFrame/Render/RenderManager.h"
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Canvas::Canvas(VecSize size)
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{
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m_texture = new Texture();
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m_texture->Init(size);
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m_sprite = new Sprite();
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m_sprite->SetTexture(m_texture);
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Actor::Init();
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glGenFramebuffers(1, &m_fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
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// 将目标纹理附加到FBO的颜色附着点
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glFramebufferTexture2D(
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GL_FRAMEBUFFER, // 帧缓冲类型
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GL_COLOR_ATTACHMENT0, // 颜色附着点（可多个，这里用第一个）
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GL_TEXTURE_2D, // 纹理类型
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m_texture->getID(), // 目标纹理ID
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0 // 多级渐远纹理级别
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);
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glBindFramebuffer(GL_FRAMEBUFFER, 0); // 解绑FBO
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}
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void Canvas::PreRender()
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{
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if (m_dirty)
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{
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glBindFramebuffer(GL_FRAMEBUFFER, m_fbo); // 绑定FBO
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// glViewport(0, 0, m_texture->getSize().width, m_texture->getSize().height);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // 全透明黑色
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glClear(GL_COLOR_BUFFER_BIT);
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Actor::PreRender();
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}
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else
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{
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m_sprite->PreRender();
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}
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}
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void Canvas::Render()
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{
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if (m_dirty)
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{
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Actor::Render();
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glBindFramebuffer(GL_FRAMEBUFFER, 0); // 解绑FBO
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// glViewport(0, 0, Game::GetInstance().Screen_W, Game::GetInstance().Screen_H);
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m_dirty = false;
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}
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RenderManager *renderer = Game::GetInstance().GetRenderer();
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renderer->SetCurrentShaderProgram("flip_y");
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m_sprite->Render();
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renderer->SetCurrentShaderProgram("normal");
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}
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void Canvas::AddChild(RefPtr<BaseNode> child)
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{
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m_dirty = true;
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Actor::AddChild(child);
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}
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