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Viewing changes to src/server/compositor/screencast_display_buffer.cpp

  • Committer: Package Import Robot
  • Author(s): Ubuntu daily release
  • Date: 2014-03-10 19:28:46 UTC
  • mto: This revision was merged to the branch mainline in revision 63.
  • Revision ID: package-import@ubuntu.com-20140310192846-rq9qm3ec26yrelo2
Tags: upstream-0.1.6+14.04.20140310
Import upstream version 0.1.6+14.04.20140310

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src/server/compositor/screencast_display_buffer.cpp
 
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/*
 
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 * Copyright © 2014 Canonical Ltd.
 
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 *
 
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 * This program is free software: you can redistribute it and/or modify it
 
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 * under the terms of the GNU General Public License version 3,
 
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 * as published by the Free Software Foundation.
 
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 *
 
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 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 
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 *
 
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 * Authored by: Alexandros Frantzis <alexandros.frantzis@canonical.com>
 
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 */
 
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#include "screencast_display_buffer.h"
 
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#include "mir/graphics/buffer.h"
 
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#include <boost/throw_exception.hpp>
 
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namespace mc = mir::compositor;
 
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namespace mg = mir::graphics;
 
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namespace geom = mir::geometry;
 
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mc::ScreencastDisplayBuffer::ScreencastDisplayBuffer(
 
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    geom::Rectangle const& rect,
 
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    mg::Buffer& buffer)
 
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    : rect(rect), buffer(buffer), old_fbo(), old_viewport()
 
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{
 
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    glGetIntegerv(GL_VIEWPORT, old_viewport);
 
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    glGetIntegerv(GL_FRAMEBUFFER_BINDING, &old_fbo);
 
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    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 
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    /* Set up the color buffer... */
 
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    glBindTexture(GL_TEXTURE_2D, color_tex);
 
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    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 
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    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
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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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    /* and the depth buffer */
 
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    glBindRenderbuffer(GL_RENDERBUFFER, depth_rbo);
 
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    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16,
 
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                          rect.size.width.as_uint32_t(),
 
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                          rect.size.height.as_uint32_t());
 
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    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
 
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                              GL_RENDERBUFFER, depth_rbo);
 
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    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
 
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        BOOST_THROW_EXCEPTION(std::runtime_error("Failed to create FBO for buffer"));
 
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}
 
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mc::ScreencastDisplayBuffer::~ScreencastDisplayBuffer()
 
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{
 
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    release_current();
 
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}
 
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geom::Rectangle mc::ScreencastDisplayBuffer::view_area() const
 
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{
 
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    return rect;
 
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}
 
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void mc::ScreencastDisplayBuffer::make_current()
 
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{
 
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    glBindTexture(GL_TEXTURE_2D, color_tex);
 
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    buffer.bind_to_texture();
 
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    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 
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                           GL_TEXTURE_2D, color_tex, 0);
 
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    auto const buf_size = buffer.size();
 
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    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 
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    glViewport(0, 0, buf_size.width.as_uint32_t(), buf_size.height.as_uint32_t());
 
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}
 
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void mc::ScreencastDisplayBuffer::release_current()
 
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{
 
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    glBindFramebuffer(GL_FRAMEBUFFER, old_fbo);
 
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    glViewport(old_viewport[0], old_viewport[1],
 
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               old_viewport[2], old_viewport[3]);
 
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}
 
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void mc::ScreencastDisplayBuffer::render_and_post_update(
 
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    std::list<std::shared_ptr<mg::Renderable>> const& renderables,
 
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    std::function<void(mg::Renderable const&)> const& render)
 
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{
 
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    for (auto const& renderable : renderables)
 
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        render(*renderable);
 
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    post_update();
 
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}
 
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void mc::ScreencastDisplayBuffer::post_update()
 
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{
 
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    glFinish();
 
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}
 
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bool mc::ScreencastDisplayBuffer::can_bypass() const
 
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{
 
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    return false;
 
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}
 
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MirOrientation mc::ScreencastDisplayBuffer::orientation() const
 
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{
 
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    return mir_orientation_normal;
 
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}