/* $Id: render.h,v 1.17 2002/10/12 14:46:34 micahjd Exp $ * * render.h - data structures and functions for rendering and manipulating * gropnodes (Graphics Operation nodes) * * PicoGUI small and efficient client/server GUI * Copyright (C) 2000-2002 Micah Dowty * * 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 2 * 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Contributors: * * * */ #ifndef __RENDER_H #define __RENDER_H #include #include #include #include /* If nonzero, this is the ID of the client that has exclusive display * access. It is allowed to render directly to vid->display, and normal * rendering should be disabled. */ extern int display_owner; /* this can be turned on to disable rendering when pgserver is on a * different virtual terminal, or it's minimized. */ extern int disable_output; /* The maximum number of parameters a gropnode could need (client * doesn't depend on this number. only for memory allocation purposes!) * * The maximum number of gropnode params should be kept as small as possible, * because all gropnodes are allocated to the same size for memory management * purposes. */ #define NUMGROPPARAMS 3 /* NOTE: This is also currently limited by * bitfield space in the PG_GROP_* constants. * 3 should be enough for almost anything, if * more space is really neaded the primitive * should be split up somehow. */ struct gropnode { u32 param[NUMGROPPARAMS]; u16 type,flags; struct rect r; struct gropnode *next; }; /* Structure to hold all state info while rendering one groplist */ struct groprender { struct rect output_rect; /* Size of output device (divnode, etc) */ struct rect orig; /* Original rect of current gropnode */ struct pair translation; /* Applied only to grops with PG_GROPF_TRANSLATE */ struct pair scroll; /* Delta translation from last redraw */ struct rect csrc; /* Additional src_x,src_y offsets from clipping */ hwrbitmap output; /* Bitmap to render to */ struct quad orig_clip; /* Original clipping rectangle, before any * PG_GROP_SETCLIP nodes modify it */ /* Params that can be set with nonvisual gropnodes */ struct rect offset, src, map; struct quad clip; u8 maptype; hwrcolor color; /* Used for all primitives */ s16 lgop; s16 angle; handle hfont; /* Added by kdhong... */ hwrcolor backColor; hwrcolor foreColor; /* Added by kdhong */ }; /***************** grop contexts */ /* The grop context stores the information necessary for one 'session' of * gropnode building or updating. The groplist's structure may change * during rendering, so this context can only be valid for a short time! */ struct gropctxt { struct gropnode **headpp; /* Head of groplist */ struct gropnode *current; /* Current position */ u32 n; /* Numerical position in gropnode list */ struct rect r; /* Current coordinates */ struct divnode *owner; /* Optional */ /* These are applied to new gropnodes */ u16 defaultgropflags; }; /* Set up a grop context for rendering to a divnode */ void gropctxt_init(struct gropctxt *ctx, struct divnode *div); /* Add a new gropnode to the context. Caller fills in * all the grop's parameters (ctx->current->foo) afterwards. * addgropsz() fills in size parameters for ya */ g_error addgrop(struct gropctxt *ctx, u16 type); g_error addgropsz(struct gropctxt *ctx, u16 type, s16 x,s16 y,s16 w,s16 h); /***************** grop functions */ void grop_addnode(struct gropnode **headpp,struct gropnode *node); void grop_free(struct gropnode **headpp); void grop_kill_zombies(void); g_error gropnode_alloc(struct gropnode **n); void gropnode_free(struct gropnode *n); void align(struct gropctxt *d,alignt align,s16 *w,s16 *h,s16 *x,s16 *y); /* This renders a divnode's groplist to the screen * * Sets up a groprender structure based on the divnode's information, * performs pre-render housekeeping, processes flags, and renders each node * * If 'clip' is non-NULL, override the usual clipping rectangle with this one. */ void grop_render(struct divnode *div, struct quad *clip); /* The below functions are steps used within the rendering process. Not * really useful by themselves, but this should help divide the monstrosity * that grop_render was becoming */ void groplist_scroll(struct groprender *r, struct divnode *div); void gropnode_nonvisual(struct groprender *r, struct gropnode *n); void gropnode_map(struct groprender *r, struct gropnode *n); void gropnode_translate(struct groprender *r, struct gropnode *n); void gropnode_clip(struct groprender *r, struct gropnode *n); void gropnode_draw(struct groprender *r, struct gropnode *n); /***************** geometry functions */ void quad_intersect(struct quad *dest, struct quad *src); struct quad *rect_to_quad(struct rect *rect); struct pair *xy_to_pair(s16 x, s16 y); #endif /* __RENDER_H */ /* The End */
