Files
@ r25014:e1f1bf3a062e
Branch filter:
Location: cpp/openttd-patchpack/source/src/video/opengl.h - annotation
r25014:e1f1bf3a062e
5.3 KiB
text/x-c
Add: [Video] move GameLoop into its own thread
This allows drawing to happen while the GameLoop is doing an
iteration too.
Sadly, not much drawing currently can be done while the GameLoop
is running, as for example PollEvent() or UpdateWindows() can
influence the game-state. As such, they first need to acquire a
lock on the game-state before they can be called.
Currently, the main advantage is the time spend in Paint(), which
for non-OpenGL drivers can be a few milliseconds. For OpenGL this
is more like 0.05 milliseconds; in these instances this change
doesn't add any benefits for now.
This is an alternative to the former "draw-thread", which moved
the drawing in a thread for some OSes. It has similar performance
gain as this does, although this implementation allows for more
finer control over what suffers when the GameLoop takes too
long: drawing or the next GameLoop. For now they both suffer
equally.
This allows drawing to happen while the GameLoop is doing an
iteration too.
Sadly, not much drawing currently can be done while the GameLoop
is running, as for example PollEvent() or UpdateWindows() can
influence the game-state. As such, they first need to acquire a
lock on the game-state before they can be called.
Currently, the main advantage is the time spend in Paint(), which
for non-OpenGL drivers can be a few milliseconds. For OpenGL this
is more like 0.05 milliseconds; in these instances this change
doesn't add any benefits for now.
This is an alternative to the former "draw-thread", which moved
the drawing in a thread for some OSes. It has similar performance
gain as this does, although this implementation allows for more
finer control over what suffers when the GameLoop takes too
long: drawing or the next GameLoop. For now they both suffer
equally.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24882:93b227b5ef29 r24895:0ba728d1a5e0 r24905:e535e9d6c85d r24905:e535e9d6c85d r24879:89d0ee92066a r24880:f078a91a5521 r24880:f078a91a5521 r24880:f078a91a5521 r24880:f078a91a5521 r24889:ca415fe5a24b r24880:f078a91a5521 r24905:e535e9d6c85d r24905:e535e9d6c85d r24880:f078a91a5521 r24905:e535e9d6c85d r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24909:194a0b94e9cb r24909:194a0b94e9cb r24909:194a0b94e9cb r24909:194a0b94e9cb r24909:194a0b94e9cb r24888:87ba0f0b3e65 r24879:89d0ee92066a r24895:0ba728d1a5e0 r24895:0ba728d1a5e0 r24887:e68d7e73076c r24886:3e122dbee73c r24895:0ba728d1a5e0 r24879:89d0ee92066a r24909:194a0b94e9cb r24908:4dfe7bc46264 r24908:4dfe7bc46264 r24908:4dfe7bc46264 r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24905:e535e9d6c85d r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24891:054f68c6eab6 r24879:89d0ee92066a r24963:38bc5b49d3a7 r24905:e535e9d6c85d r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a r24880:f078a91a5521 r24879:89d0ee92066a r24879:89d0ee92066a r24921:81caabd813bc r24921:81caabd813bc r24895:0ba728d1a5e0 r24879:89d0ee92066a r24888:87ba0f0b3e65 r24879:89d0ee92066a r24905:e535e9d6c85d r25014:e1f1bf3a062e r24905:e535e9d6c85d r24905:e535e9d6c85d r24888:87ba0f0b3e65 r24908:4dfe7bc46264 r24888:87ba0f0b3e65 r24908:4dfe7bc46264 r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24942:614da862fdaf r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24905:e535e9d6c85d r24879:89d0ee92066a r24879:89d0ee92066a r24879:89d0ee92066a | /* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file opengl.h OpenGL video driver support. */
#ifndef VIDEO_OPENGL_H
#define VIDEO_OPENGL_H
#include "../core/alloc_type.hpp"
#include "../core/geometry_type.hpp"
#include "../gfx_type.h"
#include "../spriteloader/spriteloader.hpp"
#include "../misc/lrucache.hpp"
typedef void (*OGLProc)();
typedef OGLProc (*GetOGLProcAddressProc)(const char *proc);
bool IsOpenGLVersionAtLeast(byte major, byte minor);
const char *FindStringInExtensionList(const char *string, const char *substring);
class OpenGLSprite;
/** Platform-independent back-end class for OpenGL video drivers. */
class OpenGLBackend : public ZeroedMemoryAllocator, SpriteEncoder {
private:
static OpenGLBackend *instance; ///< Singleton instance pointer.
bool persistent_mapping_supported; ///< Persistent pixel buffer mapping supported.
GLsync sync_vid_mapping; ///< Sync object for the persistently mapped video buffer.
GLsync sync_anim_mapping; ///< Sync object for the persistently mapped animation buffer.
void *vid_buffer; ///< Pointer to the mapped video buffer.
GLuint vid_pbo; ///< Pixel buffer object storing the memory used for the video driver to draw to.
GLuint vid_texture; ///< Texture handle for the video buffer texture.
GLuint vid_program; ///< Shader program for rendering a RGBA video buffer.
GLuint pal_program; ///< Shader program for rendering a paletted video buffer.
GLuint vao_quad; ///< Vertex array object storing the rendering state for the fullscreen quad.
GLuint vbo_quad; ///< Vertex buffer with a fullscreen quad.
GLuint pal_texture; ///< Palette lookup texture.
void *anim_buffer; ///< Pointer to the mapped animation buffer.
GLuint anim_pbo; ///< Pixel buffer object storing the memory used for the animation buffer.
GLuint anim_texture; ///< Texture handle for the animation buffer texture.
GLuint remap_program; ///< Shader program for blending and rendering a RGBA + remap texture.
GLint remap_sprite_loc; ///< Uniform location for sprite parameters.
GLint remap_screen_loc; ///< Uniform location for screen size;
GLint remap_zoom_loc; ///< Uniform location for sprite zoom;
GLint remap_rgb_loc; ///< Uniform location for RGB mode flag;
GLuint sprite_program; ///< Shader program for blending and rendering a sprite to the video buffer.
GLint sprite_sprite_loc; ///< Uniform location for sprite parameters.
GLint sprite_screen_loc; ///< Uniform location for screen size;
GLint sprite_zoom_loc; ///< Uniform location for sprite zoom;
GLint sprite_rgb_loc; ///< Uniform location for RGB mode flag;
GLint sprite_crash_loc; ///< Uniform location for crash remap mode flag;
LRUCache<SpriteID, Sprite> cursor_cache; ///< Cache of encoded cursor sprites.
PaletteID last_sprite_pal = (PaletteID)-1; ///< Last uploaded remap palette.
OpenGLBackend();
~OpenGLBackend();
const char *Init();
bool InitShaders();
void RenderOglSprite(OpenGLSprite *gl_sprite, PaletteID pal, int x, int y, ZoomLevel zoom);
public:
/** Get singleton instance of this class. */
static inline OpenGLBackend *Get()
{
return OpenGLBackend::instance;
}
static const char *Create(GetOGLProcAddressProc get_proc);
static void Destroy();
void PrepareContext();
void UpdatePalette(const Colour *pal, uint first, uint length);
bool Resize(int w, int h, bool force = false);
void Paint();
void DrawMouseCursor();
void PopulateCursorCache();
void ClearCursorCache();
void *GetVideoBuffer();
uint8 *GetAnimBuffer();
void ReleaseVideoBuffer(const Rect &update_rect);
void ReleaseAnimBuffer(const Rect &update_rect);
/* SpriteEncoder */
bool Is32BppSupported() override { return true; }
uint GetSpriteAlignment() override { return 1u << (ZOOM_LVL_COUNT - 1); }
Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override;
};
/** Class that encapsulates a RGBA texture together with a paletted remap texture. */
class OpenGLSprite {
private:
/** Enum of all used OpenGL texture objects. */
enum Texture {
TEX_RGBA, ///< RGBA texture part.
TEX_REMAP, ///< Remap texture part.
NUM_TEX
};
Dimension dim;
GLuint tex[NUM_TEX]; ///< The texture objects.
static GLuint dummy_tex[NUM_TEX]; ///< 1x1 dummy textures to substitute for unused sprite components.
static GLuint pal_identity; ///< Identity texture mapping.
static GLuint pal_tex; ///< Texture for palette remap.
static GLuint pal_pbo; ///< Pixel buffer object for remap upload.
static bool Create();
static void Destroy();
bool BindTextures();
public:
OpenGLSprite(uint width, uint height, uint levels, SpriteColourComponent components);
~OpenGLSprite();
void Update(uint width, uint height, uint level, const SpriteLoader::CommonPixel *data);
Dimension GetSize(ZoomLevel level) const;
friend class OpenGLBackend;
};
#endif /* VIDEO_OPENGL_H */
|