diff --git a/src/newgal/shadow-screen.c b/src/newgal/shadow-screen.c new file mode 100644 index 00000000..55823434 --- /dev/null +++ b/src/newgal/shadow-screen.c @@ -0,0 +1,279 @@ +/////////////////////////////////////////////////////////////////////////////// +// +// IMPORTANT NOTICE +// +// The following open source license statement does not apply to any +// entity in the Exception List published by FMSoft. +// +// For more information, please visit: +// +// https://www.fmsoft.cn/exception-list +// +////////////////////////////////////////////////////////////////////////////// +/* + * This file is part of MiniGUI, a mature cross-platform windowing + * and Graphics User Interface (GUI) support system for embedded systems + * and smart IoT devices. + * + * Copyright (C) 2002~2020, Beijing FMSoft Technologies Co., Ltd. + * Copyright (C) 1998~2002, WEI Yongming + * + * This program 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, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 this program. If not, see . + * + * Or, + * + * As this program is a library, any link to this program must follow + * GNU General Public License version 3 (GPLv3). If you cannot accept + * GPLv3, you need to be licensed from FMSoft. + * + * If you have got a commercial license of this program, please use it + * under the terms and conditions of the commercial license. + * + * For more information about the commercial license, please refer to + * . + */ +/* +** shadow-screen.c: +** This file implements the common helpers for GAL engines which +** use shadow (double buffering) screen. +** +** Current maintainer: Wei Yongming. +** +** Create date: 2020/03/11 +*/ + +#include +#include +#include + +#include "common.h" +#include "minigui.h" +#include "constants.h" +#include "newgal.h" +#include "sysvideo.h" + +#include "shadow-screen.h" + +#define CURRENT_VERSION 0 + +/* To use the helpers in this file, please: + - put the fields at the header of your GAL_PrivateVideoData structure. + - make sure to use the correct magic and version numbers. + - create real_screen and shadow screen correctly. + - Use shadowScreen_SetCursor, shadowScreen_MoveCursor, + and shadowScreen_UpdateRects as your SetCursor, MoveCursor, + and UpdateRects methods of your engine. + - call shadowScreen_BlitToReal in your SyncUpdate method. + */ +struct GAL_PrivateVideoData { + /* the magic number and version number */ + int magic, version; + + /* When double buffering supported, the real surface represents the ultimate + * frame buffer, and the shadow screen represents the rendering surface. + * When double buffering disabled, both are NULL. + */ + GAL_Surface *real_screen, *shadow_screen; + + RECT dirty_rc; + +#ifdef _MGSCHEMA_COMPOSITING + /* Used to simulate the hardware cursor. */ + GAL_Surface *cursor; + int csr_x, csr_y; + int hot_x, hot_y; +#endif +}; + +#ifdef _MGSCHEMA_COMPOSITING +static inline int boxleft (_THIS) +{ + if (this->hidden->cursor == NULL) + return -100; + return this->hidden->csr_x - this->hidden->hot_x; +} + +static inline int boxtop (_THIS) +{ + if (this->hidden->cursor == NULL) + return -100; + return this->hidden->csr_y - this->hidden->hot_y; +} + +#include "cursor.h" + +#define CHECK_VERSION_RETVAL(this, retval) \ + if (this->hidden->magic != MAGIC_SHADOW_SCREEN_HEADER || \ + this->hidden->version != CURRENT_VERSION) \ + return retval + +#define CHECK_VERSION_NORETVAL(this) \ + if (this->hidden->magic != MAGIC_SHADOW_SCREEN_HEADER || \ + this->hidden->version != CURRENT_VERSION) \ + return + +int shadowScreen_SetCursor (_THIS, GAL_Surface *surface, int hot_x, int hot_y) +{ + GAL_Rect rect; + + CHECK_VERSION_RETVAL (this, -1); + + if (this->hidden->cursor == surface && + this->hidden->hot_x == hot_x && + this->hidden->hot_y == hot_y) { + return 0; + } + + /* update screen to hide old cursor */ + if (this->hidden->cursor) { + rect.x = boxleft (this); + rect.y = boxtop (this); + rect.w = CURSORWIDTH; + rect.h = CURSORHEIGHT; + + this->hidden->cursor = NULL; + this->UpdateRects (this, 1, &rect); + } + + this->hidden->cursor = surface; + this->hidden->hot_x = hot_x; + this->hidden->hot_y = hot_y; + + /* update screen to show new cursor */ + if (this->hidden->cursor) { + rect.x = boxleft (this); + rect.y = boxtop (this); + rect.w = CURSORWIDTH; + rect.h = CURSORHEIGHT; + this->UpdateRects (this, 1, &rect); + } + + this->SyncUpdate (this); + return 0; +} + +int shadowScreen_MoveCursor (_THIS, int x, int y) +{ + CHECK_VERSION_RETVAL (this, -1); + + if (this->hidden->csr_x == x && + this->hidden->csr_y == y) { + return 0; + } + + if (this->hidden->cursor) { + GAL_Surface* tmp; + GAL_Rect rect; + rect.x = boxleft (this); + rect.y = boxtop (this); + rect.w = CURSORWIDTH; + rect.h = CURSORHEIGHT; + + /* update screen to hide cursor */ + tmp = this->hidden->cursor; + this->hidden->cursor = NULL; + this->UpdateRects (this, 1, &rect); + + /* update screen to show cursor */ + this->hidden->cursor = tmp; + this->hidden->csr_x = x; + this->hidden->csr_y = y; + + rect.x = boxleft (this); + rect.y = boxtop (this); + rect.w = CURSORWIDTH; + rect.h = CURSORHEIGHT; + this->UpdateRects (this, 1, &rect); + this->SyncUpdate (this); + } + else { + this->hidden->csr_x = x; + this->hidden->csr_y = y; + } + + return 0; +} + +#endif /* _MGSCHEMA_COMPOSITING */ + +void shadowScreen_UpdateRects (_THIS, int numrects, GAL_Rect *rects) +{ + int i; + RECT bound; + + CHECK_VERSION_NORETVAL (this); + + bound = this->hidden->dirty_rc; + + for (i = 0; i < numrects; i++) { + RECT rc; + + SetRect (&rc, rects[i].x, rects[i].y, + rects[i].x + rects[i].w, rects[i].y + rects[i].h); + if (IsRectEmpty (&bound)) + bound = rc; + else + GetBoundRect (&bound, &bound, &rc); + } + + this->hidden->dirty_rc = bound; +} + +/* Blit dirty content from shadow surface to ultimate surface */ +int shadowScreen_BlitToReal (_THIS) +{ + RECT bound; + + CHECK_VERSION_RETVAL (this, -1); + + bound = this->hidden->dirty_rc; + + if (this->hidden->real_screen) { + GAL_Rect src_rect, dst_rect; + src_rect.x = bound.left; + src_rect.y = bound.top; + src_rect.w = RECTW (bound); + src_rect.h = RECTH (bound); + dst_rect = src_rect; + + GAL_BlitSurface (this->hidden->shadow_screen, &src_rect, + this->hidden->real_screen, &dst_rect); +#ifdef _MGSCHEMA_COMPOSITING + if (this->hidden->cursor) { + RECT csr_rc, eff_rc; + csr_rc.left = boxleft (this); + csr_rc.top = boxtop (this); + csr_rc.right = csr_rc.left + CURSORWIDTH; + csr_rc.bottom = csr_rc.top + CURSORHEIGHT; + + if (IntersectRect (&eff_rc, &csr_rc, &bound)) { + src_rect.x = eff_rc.left - csr_rc.left; + src_rect.y = eff_rc.top - csr_rc.top; + src_rect.w = RECTW (eff_rc); + src_rect.h = RECTH (eff_rc); + + dst_rect.x = eff_rc.left; + dst_rect.y = eff_rc.top; + dst_rect.w = src_rect.w; + dst_rect.h = src_rect.h; + GAL_BlitSurface (this->hidden->cursor, &src_rect, + this->hidden->real_screen, &dst_rect); + } + } +#endif /* _MGSCHEMA_COMPOSITING */ + } + + return 0; +} + diff --git a/src/newgal/shadow-screen.h b/src/newgal/shadow-screen.h new file mode 100644 index 00000000..5de54c69 --- /dev/null +++ b/src/newgal/shadow-screen.h @@ -0,0 +1,76 @@ +/////////////////////////////////////////////////////////////////////////////// +// +// IMPORTANT NOTICE +// +// The following open source license statement does not apply to any +// entity in the Exception List published by FMSoft. +// +// For more information, please visit: +// +// https://www.fmsoft.cn/exception-list +// +////////////////////////////////////////////////////////////////////////////// +/* + * This file is part of MiniGUI, a mature cross-platform windowing + * and Graphics User Interface (GUI) support system for embedded systems + * and smart IoT devices. + * + * Copyright (C) 2002~2020, Beijing FMSoft Technologies Co., Ltd. + * Copyright (C) 1998~2002, WEI Yongming + * + * This program 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, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 this program. If not, see . + * + * Or, + * + * As this program is a library, any link to this program must follow + * GNU General Public License version 3 (GPLv3). If you cannot accept + * GPLv3, you need to be licensed from FMSoft. + * + * If you have got a commercial license of this program, please use it + * under the terms and conditions of the commercial license. + * + * For more information about the commercial license, please refer to + * . + */ +/* +** The common helpers for shadow (double buffering) screen. +** +** Current maintainer: Wei Yongming. +** +** Create date: 2020/03/11 +*/ + +#ifndef _GAL_shadow_screen_h +#define _GAL_shadow_screen_h + +#define MAGIC_SHADOW_SCREEN_HEADER 0x20100723 + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#ifndef _THIS +# define _THIS GAL_VideoDevice *this +#endif + +int shadowScreen_SetCursor (_THIS, GAL_Surface *surface, int hot_x, int hot_y); +int shadowScreen_MoveCursor (_THIS, int x, int y); +void shadowScreen_UpdateRects (_THIS, int numrects, GAL_Rect *rects); +int shadowScreen_BlitToReal (_THIS); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* _GAL_shadow_screen_h */