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107 lines
3.3 KiB
107 lines
3.3 KiB
/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "framebuffer.h"
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#include "graphics.h"
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#include "texture.h"
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uint FrameBuffer::boundFbo = 0;
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FrameBuffer::FrameBuffer(const Size& size)
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{
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m_clearColor = Fw::alpha;
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glGenFramebuffers(1, &m_fbo);
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if(!m_fbo)
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logFatal("Unable to create framebuffer object");
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resize(size);
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}
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FrameBuffer::~FrameBuffer()
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{
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glDeleteFramebuffers(1, &m_fbo);
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}
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void FrameBuffer::resize(const Size& size)
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{
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if(m_texture && m_texture->getSize() == size)
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return;
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internalBind();
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m_texture = TexturePtr(new Texture(size.width(), size.height(), 4));
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m_texture->setSmooth(true);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture->getId(), 0);
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GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if(status != GL_FRAMEBUFFER_COMPLETE)
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logFatal("Unable to setup framebuffer object");
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internalRelease();
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}
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void FrameBuffer::bind(bool clear)
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{
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internalBind();
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Matrix3 projectionMatrix = { 2.0f/m_texture->getWidth(), 0.0f, 0.0f,
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0.0f, 2.0f/m_texture->getHeight(), 0.0f,
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-1.0f, -1.0f, 0.0f };
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m_oldProjectionMatrix = g_painter.getProjectionMatrix();
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m_oldViewportSize = g_graphics.getViewportSize();
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g_painter.setProjectionMatrix(projectionMatrix);
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g_graphics.setViewportSize(m_texture->getSize());
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if(clear) {
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glClearColor(m_clearColor.rF(), m_clearColor.gF(), m_clearColor.bF(), m_clearColor.aF());
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glClear(GL_COLOR_BUFFER_BIT);
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}
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}
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void FrameBuffer::release()
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{
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internalRelease();
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g_painter.setProjectionMatrix(m_oldProjectionMatrix);
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g_graphics.setViewportSize(m_oldViewportSize);
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}
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void FrameBuffer::draw(const Rect& dest)
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{
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g_painter.drawTexturedRect(dest, m_texture);
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}
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void FrameBuffer::internalBind()
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{
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if(boundFbo == m_fbo)
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return;
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assert(boundFbo != m_fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
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m_prevBoundFbo = boundFbo;
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boundFbo = m_fbo;
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}
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void FrameBuffer::internalRelease()
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{
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assert(boundFbo == m_fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, m_prevBoundFbo);
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boundFbo = m_prevBoundFbo;
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}
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