mirror of
https://github.com/gnif/LookingGlass.git
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bca54ab1f6
This changes the method of the memory copy from the host application to the guest. Instead of performing a full copy from the capture device into shared memory, and then flagging the new frame, we instead set a write pointer, flag the client that there is a new frame and then copy in chunks of 1024 bytes until the entire frame is copied. The client upon seeing the new frame flag begins to poll at high frequency the write pointer and upon each update copies as much as it can into the texture. This should improve latency but also slightly increase CPU usage on the client due to the high frequency polling.
115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_ttf.h>
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#include "app.h"
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#include "common/KVMFR.h"
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#include "common/framebuffer.h"
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#define IS_LG_RENDERER_VALID(x) \
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((x)->get_name && \
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(x)->create && \
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(x)->initialize && \
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(x)->deinitialize && \
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(x)->on_resize && \
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(x)->on_mouse_shape && \
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(x)->on_mouse_event && \
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(x)->on_alert && \
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(x)->render_startup && \
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(x)->render && \
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(x)->update_fps)
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typedef struct LG_RendererParams
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{
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// TTF_Font * font;
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// TTF_Font * alertFont;
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bool showFPS;
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}
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LG_RendererParams;
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typedef struct LG_RendererFormat
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{
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FrameType type; // frame type
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unsigned int width; // image width
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unsigned int height; // image height
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unsigned int stride; // scanline width (zero if compresed)
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unsigned int pitch; // scanline bytes (or compressed size)
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unsigned int bpp; // bits per pixel (zero if compressed)
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}
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LG_RendererFormat;
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typedef struct LG_RendererRect
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{
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bool valid;
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int x;
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int y;
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unsigned int w;
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unsigned int h;
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}
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LG_RendererRect;
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typedef enum LG_RendererCursor
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{
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LG_CURSOR_COLOR ,
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LG_CURSOR_MONOCHROME ,
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LG_CURSOR_MASKED_COLOR
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}
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LG_RendererCursor;
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// returns the friendly name of the renderer
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typedef const char * (* LG_RendererGetName)();
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// called pre-creation to allow the renderer to register any options it might have
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typedef void (* LG_RendererSetup)();
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typedef bool (* LG_RendererCreate )(void ** opaque, const LG_RendererParams params);
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typedef bool (* LG_RendererInitialize )(void * opaque, Uint32 * sdlFlags);
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typedef void (* LG_RendererDeInitialize)(void * opaque);
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typedef void (* LG_RendererOnResize )(void * opaque, const int width, const int height, const LG_RendererRect destRect);
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typedef bool (* LG_RendererOnMouseShape)(void * opaque, const LG_RendererCursor cursor, const int width, const int height, const int pitch, const uint8_t * data);
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typedef bool (* LG_RendererOnMouseEvent)(void * opaque, const bool visible , const int x, const int y);
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typedef bool (* LG_RendererOnFrameEvent)(void * opaque, const LG_RendererFormat format, const FrameBuffer frame);
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typedef void (* LG_RendererOnAlert )(void * opaque, const LG_MsgAlert alert, const char * message, bool ** closeFlag);
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typedef bool (* LG_RendererRender )(void * opaque, SDL_Window *window);
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typedef void (* LG_RendererUpdateFPS )(void * opaque, const float avgUPS, const float avgFPS);
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typedef struct LG_Renderer
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{
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LG_RendererGetName get_name;
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LG_RendererSetup setup;
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LG_RendererCreate create;
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LG_RendererInitialize initialize;
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LG_RendererDeInitialize deinitialize;
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LG_RendererOnResize on_resize;
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LG_RendererOnMouseShape on_mouse_shape;
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LG_RendererOnMouseEvent on_mouse_event;
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LG_RendererOnFrameEvent on_frame_event;
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LG_RendererOnAlert on_alert;
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LG_RendererRender render_startup;
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LG_RendererRender render;
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LG_RendererUpdateFPS update_fps;
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}
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LG_Renderer; |