mirror of https://github.com/odrling/Aegisub
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// Aegisub Project http://www.aegisub.org/
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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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#include <vector>
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struct VideoFrame;
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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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struct TextureInfo;
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/// The maximum texture size supported by the user's graphics card
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int maxTextureSize = 0;
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/// Whether rectangular textures are supported by the user's graphics card
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bool supportsRectangularTextures = false;
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/// The internalformat to use
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int internalFormat = 0;
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/// The frame height which the texture grid has been set up for
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int frameWidth = 0;
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/// The frame width which the texture grid has been set up for
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int frameHeight = 0;
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/// The frame format which the texture grid has been set up for
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GLenum frameFormat = 0;
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/// Whether the grid is set up for flipped video
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bool frameFlipped = false;
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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 = 0;
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/// The total texture count
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int textureCount = 0;
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/// The number of rows of textures
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int textureRows = 0;
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/// The number of columns of textures
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int textureCols = 0;
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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 &) = delete;
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VideoOutGL& operator=(const VideoOutGL&) = delete;
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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(VideoFrame const& 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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VideoOutGL();
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~VideoOutGL();
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};
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/// Base class for all exceptions thrown by VideoOutGL
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DEFINE_EXCEPTION(VideoOutException, agi::Exception);
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/// An OpenGL error occurred while uploading or displaying a frame
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class VideoOutRenderException final : public VideoOutException {
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public:
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VideoOutRenderException(const char *func, int err)
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: VideoOutException(std::string(func) + " failed with error code " + std::to_string(err))
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{ }
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};
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/// An OpenGL error occurred while setting up the video display
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class VideoOutInitException final : public VideoOutException {
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public:
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VideoOutInitException(const char *func, int err)
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: VideoOutException(std::string(func) + " failed with error code " + std::to_string(err))
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{ }
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VideoOutInitException(const char *err) : VideoOutException(err) { }
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};
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