157 lines
4.4 KiB
C++
157 lines
4.4 KiB
C++
/*
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* Copyright (c) 2010-2017 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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#include <framework/platform/platformwindow.h>
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#include <framework/core/application.h>
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uint FrameBuffer::boundFbo = 0;
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FrameBuffer::FrameBuffer()
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{
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internalCreate();
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}
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void FrameBuffer::internalCreate()
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{
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m_prevBoundFbo = 0;
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m_fbo = 0;
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if(g_graphics.canUseFBO()) {
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glGenFramebuffers(1, &m_fbo);
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if(!m_fbo)
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g_logger.fatal("Unable to create framebuffer object");
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}
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}
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FrameBuffer::~FrameBuffer()
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{
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#ifndef NDEBUG
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assert(!g_app.isTerminated());
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#endif
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if(g_graphics.ok() && m_fbo != 0)
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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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assert(size.isValid());
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if(m_texture && m_texture->getSize() == size)
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return;
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m_texture = TexturePtr(new Texture(size));
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m_texture->setSmooth(m_smooth);
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m_texture->setUpsideDown(true);
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if(m_fbo) {
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internalBind();
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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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g_logger.fatal("Unable to setup framebuffer object");
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internalRelease();
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} else {
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if(m_backuping) {
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m_screenBackup = TexturePtr(new Texture(size));
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m_screenBackup->setUpsideDown(true);
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}
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}
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}
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void FrameBuffer::bind()
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{
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g_painter->saveAndResetState();
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internalBind();
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g_painter->setResolution(m_texture->getSize());
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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->restoreSavedState();
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}
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void FrameBuffer::draw()
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{
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Rect rect(0,0, getSize());
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g_painter->drawTexturedRect(rect, m_texture, rect);
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}
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void FrameBuffer::draw(const Rect& dest, const Rect& src)
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{
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g_painter->drawTexturedRect(dest, m_texture, src);
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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, Rect(0,0, getSize()));
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}
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void FrameBuffer::internalBind()
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{
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if(m_fbo) {
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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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} else if(m_backuping) {
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// backup screen color buffer into a texture
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m_screenBackup->copyFromScreen(Rect(0, 0, getSize()));
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}
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}
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void FrameBuffer::internalRelease()
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{
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if(m_fbo) {
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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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} else {
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Rect screenRect(0, 0, getSize());
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// copy the drawn color buffer into the framebuffer texture
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m_texture->copyFromScreen(screenRect);
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// restore screen original content
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if(m_backuping) {
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glDisable(GL_BLEND);
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g_painter->setColor(Color::white);
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g_painter->drawTexturedRect(screenRect, m_screenBackup, screenRect);
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glEnable(GL_BLEND);
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}
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}
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}
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Size FrameBuffer::getSize()
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{
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if(m_fbo == 0) {
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// the buffer size is limited by the window size
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return Size(std::min<int>(m_texture->getWidth(), g_window.getWidth()),
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std::min<int>(m_texture->getHeight(), g_window.getHeight()));
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}
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return m_texture->getSize();
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}
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