131 lines
4.8 KiB
C++
131 lines
4.8 KiB
C++
// Copyright (c) 2009, Thomas Goyne
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file video_out_gl.h
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/// @brief OpenGL based video renderer
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/// @ingroup video
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///
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#include <libaegisub/exception.h>
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#ifndef AGI_PRE
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#include <vector>
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#endif
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#include "compat.h"
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class AegiVideoFrame;
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/// @class VideoOutGL
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/// @brief OpenGL based video renderer
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class VideoOutGL {
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private:
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struct TextureInfo;
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/// The maximum texture size supported by the user's graphics card
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int maxTextureSize;
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/// Whether rectangular textures are supported by the user's graphics card
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bool supportsRectangularTextures;
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/// The internalformat to use
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int internalFormat;
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/// The frame height which the texture grid has been set up for
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int frameWidth;
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/// The frame width which the texture grid has been set up for
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int frameHeight;
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/// The frame format which the texture grid has been set up for
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GLenum frameFormat;
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/// Whether the grid is set up for flipped video
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bool frameFlipped;
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/// List of OpenGL texture ids used in the grid
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std::vector<GLuint> textureIdList;
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/// List of precalculated texture display information
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std::vector<TextureInfo> textureList;
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/// OpenGL display list which draws the frames
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GLuint dl;
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/// The total texture count
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int textureCount;
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/// The number of rows of textures
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int textureRows;
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/// The number of columns of textures
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int textureCols;
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void DetectOpenGLCapabilities();
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void InitTextures(int width, int height, GLenum format, int bpp, bool flipped);
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VideoOutGL(const VideoOutGL &);
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VideoOutGL& operator=(const VideoOutGL&);
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public:
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/// @brief Set the frame to be displayed when Render() is called
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/// @param frame The frame to be displayed
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void UploadFrameData(const AegiVideoFrame& frame);
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/// @brief Render a frame
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/// @param x Bottom left x coordinate
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/// @param y Bottom left y coordinate
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/// @param width Width in pixels of viewport
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/// @param height Height in pixels of viewport
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void Render(int x, int y, int width, int height);
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/// @brief Constructor
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VideoOutGL();
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/// @brief Destructor
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~VideoOutGL();
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};
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/// @class VideoOutException
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/// @extends Aegisub::Exception
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/// @brief Base class for all exceptions thrown by VideoOutGL
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DEFINE_BASE_EXCEPTION_NOINNER(VideoOutException, agi::Exception)
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/// @class VideoOutRenderException
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/// @extends VideoOutException
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/// @brief An OpenGL error occured while uploading or displaying a frame
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class VideoOutRenderException : public VideoOutException {
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public:
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VideoOutRenderException(const char *func, int err)
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: VideoOutException(STD_STR(wxString::Format("%s failed with error code %d", func, err)))
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{ }
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const char * GetName() const { return "videoout/opengl/render"; }
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Exception * Copy() const { return new VideoOutRenderException(*this); }
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};
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/// @class VideoOutOpenGLException
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/// @extends VideoOutException
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/// @brief An OpenGL error occured while setting up the video display
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class VideoOutInitException : public VideoOutException {
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public:
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VideoOutInitException(const char *func, int err)
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: VideoOutException(STD_STR(wxString::Format("%s failed with error code %d", func, err)))
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{ }
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VideoOutInitException(const char *err) : VideoOutException(err) { }
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const char * GetName() const { return "videoout/opengl/init"; }
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Exception * Copy() const { return new VideoOutInitException(*this); }
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};
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