Added tr.cxx / tr.h, Brian Paul's LGPL'd tiled rendering support libs for
rendering ultra high res "tiled" screen shots.
This commit is contained in:
curt
parent
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@ -2,11 +2,12 @@ includedir = @includedir@/screen
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lib_LIBRARIES = libsgscreen.a
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include_HEADERS = screen-dump.hxx
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include_HEADERS = screen-dump.hxx tr.h
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libsgscreen_a_SOURCES = \
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GLBitmaps.cxx GLBitmaps.h \
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screen-dump.cxx \
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tr.cxx \
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win32-printer.h
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INCLUDES += -I$(top_srcdir)
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505
simgear/screen/tr.cxx
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505
simgear/screen/tr.cxx
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@ -0,0 +1,505 @@
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/* $Id$ */
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/*
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* $Log$
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* Revision 1.1 2001/06/26 15:19:39 curt
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* Added tr.cxx / tr.h, Brian Paul's LGPL'd tiled rendering support libs for
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* rendering ultra high res "tiled" screen shots.
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*
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* Revision 1.9 1998/01/29 16:56:54 brianp
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* allow trOrtho() and trFrustum() to be called at any time, minor clean-up
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*
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* Revision 1.8 1998/01/28 19:47:39 brianp
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* minor clean-up for C++
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*
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* Revision 1.7 1997/07/21 17:34:38 brianp
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* added tile borders
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*
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* Revision 1.6 1997/07/21 15:47:35 brianp
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* renamed all "near" and "far" variables
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*
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* Revision 1.5 1997/04/26 21:23:25 brianp
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* added trRasterPos3f function
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*
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* Revision 1.4 1997/04/26 19:59:36 brianp
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* set CurrentTile to -1 before first tile and after last tile
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*
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* Revision 1.3 1997/04/22 23:51:15 brianp
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* added WIN32 header stuff, removed tabs
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*
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* Revision 1.2 1997/04/19 23:26:10 brianp
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* many API changes
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*
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* Revision 1.1 1997/04/18 21:53:05 brianp
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* Initial revision
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*
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*/
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/*
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* Tiled Rendering library
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* Version 1.1
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* Copyright (C) Brian Paul
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*/
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef WIN32
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#include <windows.h>
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#endif
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <plib/ssg.h>
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#include "tr.h"
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#define DEFAULT_TILE_WIDTH 256
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#define DEFAULT_TILE_HEIGHT 256
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#define DEFAULT_TILE_BORDER 0
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struct _TRctx {
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/* Final image parameters */
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GLint ImageWidth, ImageHeight;
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GLenum ImageFormat, ImageType;
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GLvoid *ImageBuffer;
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/* Tile parameters */
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GLint TileWidth, TileHeight;
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GLint TileWidthNB, TileHeightNB;
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GLint TileBorder;
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GLenum TileFormat, TileType;
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GLvoid *TileBuffer;
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/* Projection parameters */
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GLboolean Perspective;
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GLdouble Left;
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GLdouble Right;
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GLdouble Bottom;
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GLdouble Top;
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GLdouble Near;
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GLdouble Far;
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/* Misc */
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TRenum RowOrder;
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GLint Rows, Columns;
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GLint CurrentTile;
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GLint CurrentTileWidth, CurrentTileHeight;
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GLint CurrentRow, CurrentColumn;
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GLint ViewportSave[4];
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};
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/*
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* Misc setup including computing number of tiles (rows and columns).
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*/
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static void Setup(TRcontext *tr)
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{
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if (!tr)
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return;
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tr->Columns = (tr->ImageWidth + tr->TileWidthNB - 1) / tr->TileWidthNB;
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tr->Rows = (tr->ImageHeight + tr->TileHeightNB - 1) / tr->TileHeightNB;
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tr->CurrentTile = 0;
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assert(tr->Columns >= 0);
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assert(tr->Rows >= 0);
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}
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TRcontext *trNew(void)
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{
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TRcontext *tr = (TRcontext *) calloc(1, sizeof(TRcontext));
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if (tr) {
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tr->TileWidth = DEFAULT_TILE_WIDTH;
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tr->TileHeight = DEFAULT_TILE_HEIGHT;
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tr->TileBorder = DEFAULT_TILE_BORDER;
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tr->RowOrder = TR_BOTTOM_TO_TOP;
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tr->CurrentTile = -1;
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}
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return (TRcontext *) tr;
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}
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void trDelete(TRcontext *tr)
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{
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if (tr)
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free(tr);
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}
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void trTileSize(TRcontext *tr, GLint width, GLint height, GLint border)
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{
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if (!tr)
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return;
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assert(border >= 0);
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assert(width >= 1);
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assert(height >= 1);
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assert(width >= 2*border);
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assert(height >= 2*border);
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tr->TileBorder = border;
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tr->TileWidth = width;
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tr->TileHeight = height;
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tr->TileWidthNB = width - 2 * border;
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tr->TileHeightNB = height - 2 * border;
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Setup(tr);
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}
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void trTileBuffer(TRcontext *tr, GLenum format, GLenum type, GLvoid *image)
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{
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if (!tr)
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return;
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tr->TileFormat = format;
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tr->TileType = type;
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tr->TileBuffer = image;
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}
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void trImageSize(TRcontext *tr, GLint width, GLint height)
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{
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if (!tr)
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return;
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tr->ImageWidth = width;
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tr->ImageHeight = height;
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Setup(tr);
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}
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void trImageBuffer(TRcontext *tr, GLenum format, GLenum type, GLvoid *image)
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{
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if (!tr)
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return;
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tr->ImageFormat = format;
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tr->ImageType = type;
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tr->ImageBuffer = image;
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}
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GLint trGet(TRcontext *tr, TRenum param)
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{
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if (!tr)
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return 0;
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switch (param) {
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case TR_TILE_WIDTH:
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return tr->TileWidth;
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case TR_TILE_HEIGHT:
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return tr->TileHeight;
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case TR_TILE_BORDER:
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return tr->TileBorder;
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case TR_IMAGE_WIDTH:
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return tr->ImageWidth;
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case TR_IMAGE_HEIGHT:
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return tr->ImageHeight;
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case TR_ROWS:
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return tr->Rows;
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case TR_COLUMNS:
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return tr->Columns;
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case TR_CURRENT_ROW:
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if (tr->CurrentTile<0)
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return -1;
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else
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return tr->CurrentRow;
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case TR_CURRENT_COLUMN:
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if (tr->CurrentTile<0)
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return -1;
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else
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return tr->CurrentColumn;
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case TR_CURRENT_TILE_WIDTH:
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return tr->CurrentTileWidth;
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case TR_CURRENT_TILE_HEIGHT:
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return tr->CurrentTileHeight;
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case TR_ROW_ORDER:
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return (GLint) tr->RowOrder;
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default:
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return 0;
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}
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}
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GLdouble trGetD(TRcontext *tr, TRenum param)
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{
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if (!tr)
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return 0.0;
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switch (param) {
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case TR_LEFT:
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return tr->Left;
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case TR_RIGHT:
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return tr->Right;
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case TR_BOTTOM:
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return tr->Bottom;
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case TR_TOP:
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return tr->Top;
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case TR_NEAR:
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return tr->Near;
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case TR_FAR:
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return tr->Far;
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default:
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return 0.0;
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}
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}
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void trRowOrder(TRcontext *tr, TRenum order)
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{
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if (!tr)
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return;
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if (order==TR_TOP_TO_BOTTOM || order==TR_BOTTOM_TO_TOP)
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tr->RowOrder = order;
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}
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void trOrtho(TRcontext *tr,
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GLdouble left, GLdouble right,
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GLdouble bottom, GLdouble top,
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GLdouble zNear, GLdouble zFar)
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{
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if (!tr)
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return;
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tr->Perspective = GL_FALSE;
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tr->Left = left;
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tr->Right = right;
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tr->Bottom = bottom;
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tr->Top = top;
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tr->Near = zNear;
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tr->Far = zFar;
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}
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void trFrustum(TRcontext *tr,
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GLdouble left, GLdouble right,
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GLdouble bottom, GLdouble top,
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GLdouble zNear, GLdouble zFar)
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{
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if (!tr)
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return;
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tr->Perspective = GL_TRUE;
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tr->Left = left;
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tr->Right = right;
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tr->Bottom = bottom;
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tr->Top = top;
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tr->Near = zNear;
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tr->Far = zFar;
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}
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void trPerspective(TRcontext *tr,
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GLdouble fovy, GLdouble aspect,
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GLdouble zNear, GLdouble zFar )
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{
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GLdouble xmin, xmax, ymin, ymax;
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ymax = zNear * tan(fovy * 3.14159265 / 360.0);
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ymin = -ymax;
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xmin = ymin * aspect;
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xmax = ymax * aspect;
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trFrustum(tr, xmin, xmax, ymin, ymax, zNear, zFar);
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}
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void trBeginTile(TRcontext *tr)
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{
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GLint matrixMode;
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GLint tileWidth, tileHeight, border;
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GLdouble left, right, bottom, top;
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if (!tr)
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return;
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if (tr->CurrentTile <= 0) {
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Setup(tr);
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/* Save user's viewport, will be restored after last tile rendered */
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glGetIntegerv(GL_VIEWPORT, tr->ViewportSave);
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}
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/* which tile (by row and column) we're about to render */
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if (tr->RowOrder==TR_BOTTOM_TO_TOP) {
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tr->CurrentRow = tr->CurrentTile / tr->Columns;
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tr->CurrentColumn = tr->CurrentTile % tr->Columns;
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}
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else if (tr->RowOrder==TR_TOP_TO_BOTTOM) {
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tr->CurrentRow = tr->Rows - (tr->CurrentTile / tr->Columns) - 1;
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tr->CurrentColumn = tr->CurrentTile % tr->Columns;
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}
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else {
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/* This should never happen */
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abort();
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}
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assert(tr->CurrentRow < tr->Rows);
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assert(tr->CurrentColumn < tr->Columns);
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border = tr->TileBorder;
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/* Compute actual size of this tile with border */
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if (tr->CurrentRow < tr->Rows-1)
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tileHeight = tr->TileHeight;
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else
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tileHeight = tr->ImageHeight - (tr->Rows-1) * (tr->TileHeightNB) + 2 * border;
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if (tr->CurrentColumn < tr->Columns-1)
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tileWidth = tr->TileWidth;
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else
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tileWidth = tr->ImageWidth - (tr->Columns-1) * (tr->TileWidthNB) + 2 * border;
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/* Save tile size, with border */
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tr->CurrentTileWidth = tileWidth;
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tr->CurrentTileHeight = tileHeight;
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glViewport(0, 0, tileWidth, tileHeight); /* tile size including border */
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/* save current matrix mode */
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glGetIntegerv(GL_MATRIX_MODE, &matrixMode);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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/* compute projection parameters */
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left = tr->Left + (tr->Right - tr->Left)
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* (tr->CurrentColumn * tr->TileWidthNB - border) / tr->ImageWidth;
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right = left + (tr->Right - tr->Left) * tileWidth / tr->ImageWidth;
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bottom = tr->Bottom + (tr->Top - tr->Bottom)
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* (tr->CurrentRow * tr->TileHeightNB - border) / tr->ImageHeight;
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top = bottom + (tr->Top - tr->Bottom) * tileHeight / tr->ImageHeight;
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ssgSetFrustum ( left, right, bottom, top, tr->Near, tr->Far );
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/* restore user's matrix mode */
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glMatrixMode(matrixMode);
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}
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int trEndTile(TRcontext *tr)
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{
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GLint prevRowLength, prevSkipRows, prevSkipPixels /*, prevAlignment */;
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if (!tr)
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return 0;
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assert(tr->CurrentTile>=0);
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/* be sure OpenGL rendering is finished */
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glFlush();
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/* save current glPixelStore values */
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glGetIntegerv(GL_PACK_ROW_LENGTH, &prevRowLength);
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glGetIntegerv(GL_PACK_SKIP_ROWS, &prevSkipRows);
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glGetIntegerv(GL_PACK_SKIP_PIXELS, &prevSkipPixels);
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/*glGetIntegerv(GL_PACK_ALIGNMENT, &prevAlignment);*/
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if (tr->TileBuffer) {
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GLint srcX = tr->TileBorder;
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GLint srcY = tr->TileBorder;
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GLint srcWidth = tr->TileWidthNB;
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GLint srcHeight = tr->TileHeightNB;
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glReadPixels(srcX, srcY, srcWidth, srcHeight,
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tr->TileFormat, tr->TileType, tr->TileBuffer);
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}
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if (tr->ImageBuffer) {
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GLint srcX = tr->TileBorder;
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GLint srcY = tr->TileBorder;
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GLint srcWidth = tr->CurrentTileWidth - 2 * tr->TileBorder;
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GLint srcHeight = tr->CurrentTileHeight - 2 * tr->TileBorder;
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GLint destX = tr->TileWidthNB * tr->CurrentColumn;
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GLint destY = tr->TileHeightNB * tr->CurrentRow;
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/* setup pixel store for glReadPixels */
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glPixelStorei(GL_PACK_ROW_LENGTH, tr->ImageWidth);
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glPixelStorei(GL_PACK_SKIP_ROWS, destY);
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glPixelStorei(GL_PACK_SKIP_PIXELS, destX);
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/*glPixelStorei(GL_PACK_ALIGNMENT, 1);*/
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/* read the tile into the final image */
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glReadPixels(srcX, srcY, srcWidth, srcHeight,
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tr->ImageFormat, tr->ImageType, tr->ImageBuffer);
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}
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/* restore previous glPixelStore values */
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glPixelStorei(GL_PACK_ROW_LENGTH, prevRowLength);
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glPixelStorei(GL_PACK_SKIP_ROWS, prevSkipRows);
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glPixelStorei(GL_PACK_SKIP_PIXELS, prevSkipPixels);
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/*glPixelStorei(GL_PACK_ALIGNMENT, prevAlignment);*/
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/* increment tile counter, return 1 if more tiles left to render */
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tr->CurrentTile++;
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if (tr->CurrentTile >= tr->Rows * tr->Columns) {
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/* restore user's viewport */
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glViewport(tr->ViewportSave[0], tr->ViewportSave[1],
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tr->ViewportSave[2], tr->ViewportSave[3]);
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tr->CurrentTile = -1; /* all done */
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return 0;
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}
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else
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return 1;
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}
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/*
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* Replacement for glRastePos3f() which avoids the problem with invalid
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* raster pos.
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*/
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void trRasterPos3f(TRcontext *tr, GLfloat x, GLfloat y, GLfloat z)
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{
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if (tr->CurrentTile<0) {
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/* not doing tile rendering right now. Let OpenGL do this. */
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glRasterPos3f(x, y, z);
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}
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else {
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GLdouble modelview[16], proj[16];
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GLint viewport[4];
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GLdouble winX, winY, winZ;
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/* Get modelview, projection and viewport */
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glGetDoublev(GL_MODELVIEW_MATRIX, modelview);
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glGetDoublev(GL_PROJECTION_MATRIX, proj);
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viewport[0] = 0;
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viewport[1] = 0;
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viewport[2] = tr->CurrentTileWidth;
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viewport[3] = tr->CurrentTileHeight;
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/* Project object coord to window coordinate */
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if (gluProject(x, y, z, modelview, proj, viewport, &winX, &winY, &winZ)){
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/* set raster pos to window coord (0,0) */
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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glLoadIdentity();
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glLoadIdentity();
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glOrtho(0.0, tr->CurrentTileWidth,
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0.0, tr->CurrentTileHeight, 0.0, 1.0);
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glRasterPos3f(0.0, 0.0, -winZ);
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/* Now use empty bitmap to adjust raster position to (winX,winY) */
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{
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GLubyte bitmap[1] = {0};
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glBitmap(1, 1, 0.0, 0.0, winX, winY, bitmap);
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}
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/* restore original matrices */
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glPopMatrix(); /*proj*/
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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}
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#ifdef DEBUG
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if (glGetError())
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printf("GL error!\n");
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
170
simgear/screen/tr.h
Normal file
170
simgear/screen/tr.h
Normal file
@ -0,0 +1,170 @@
|
||||
/* $Id$ */
|
||||
|
||||
/*
|
||||
* $Log$
|
||||
* Revision 1.1 2001/06/26 15:19:39 curt
|
||||
* Added tr.cxx / tr.h, Brian Paul's LGPL'd tiled rendering support libs for
|
||||
* rendering ultra high res "tiled" screen shots.
|
||||
*
|
||||
* Revision 1.5 1997/07/21 17:34:07 brianp
|
||||
* added tile borders, incremented version to 1.1
|
||||
*
|
||||
* Revision 1.4 1997/07/21 15:47:35 brianp
|
||||
* renamed all "near" and "far" variables
|
||||
*
|
||||
* Revision 1.3 1997/04/26 21:23:25 brianp
|
||||
* added trRasterPos3f function
|
||||
*
|
||||
* Revision 1.2 1997/04/19 23:26:10 brianp
|
||||
* many API changes
|
||||
*
|
||||
* Revision 1.1 1997/04/18 21:53:05 brianp
|
||||
* Initial revision
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
* Tiled Rendering library
|
||||
* Version 1.1
|
||||
* Copyright (C) Brian Paul
|
||||
*
|
||||
*
|
||||
* This library allows one to render arbitrarily large images with OpenGL.
|
||||
* The basic idea is to break the image into tiles which are rendered one
|
||||
* at a time. The tiles are assembled together to form the final, large
|
||||
* image. Tiles and images can be of any size.
|
||||
*
|
||||
* Basic usage:
|
||||
*
|
||||
* 1. Allocate a tile rendering context:
|
||||
* TRcontext t = trNew();
|
||||
*
|
||||
* 2. Specify the final image buffer and tile size:
|
||||
* GLubyte image[W][H][4]
|
||||
* trImageSize(t, W, H);
|
||||
* trImageBuffer(t, GL_RGBA, GL_UNSIGNED_BYTE, (GLubyte *) image);
|
||||
*
|
||||
* 3. Setup your projection:
|
||||
* trFrustum(t, left, right, bottom top, near, far);
|
||||
* or
|
||||
* trOrtho(t, left, right, bottom top, near, far);
|
||||
* or
|
||||
* trPerspective(t, fovy, aspect, near, far);
|
||||
*
|
||||
* 4. Render the tiles:
|
||||
* do {
|
||||
* trBeginTile(t);
|
||||
* DrawMyScene();
|
||||
* } while (trEndTile(t));
|
||||
*
|
||||
* You provide the DrawMyScene() function which calls glClear() and
|
||||
* draws all your stuff.
|
||||
*
|
||||
* 5. The image array is now complete. Display it, write it to a file, etc.
|
||||
*
|
||||
* 6. Delete the tile rendering context when finished:
|
||||
* trDelete(t);
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
#ifndef TR_H
|
||||
#define TR_H
|
||||
|
||||
|
||||
#include <GL/gl.h>
|
||||
|
||||
|
||||
//#ifdef __cplusplus
|
||||
//extern "C" {
|
||||
//#endif
|
||||
|
||||
|
||||
#define TR_VERSION "1.1"
|
||||
#define TR_MAJOR_VERSION 1
|
||||
#define TR_MINOR_VERSION 1
|
||||
|
||||
|
||||
typedef struct _TRctx TRcontext;
|
||||
|
||||
|
||||
typedef enum {
|
||||
TR_TILE_WIDTH = 100,
|
||||
TR_TILE_HEIGHT,
|
||||
TR_TILE_BORDER,
|
||||
TR_IMAGE_WIDTH,
|
||||
TR_IMAGE_HEIGHT,
|
||||
TR_ROWS,
|
||||
TR_COLUMNS,
|
||||
TR_CURRENT_ROW,
|
||||
TR_CURRENT_COLUMN,
|
||||
TR_CURRENT_TILE_WIDTH,
|
||||
TR_CURRENT_TILE_HEIGHT,
|
||||
TR_ROW_ORDER,
|
||||
TR_TOP_TO_BOTTOM,
|
||||
TR_BOTTOM_TO_TOP,
|
||||
TR_LEFT,
|
||||
TR_RIGHT,
|
||||
TR_BOTTOM,
|
||||
TR_TOP,
|
||||
TR_NEAR,
|
||||
TR_FAR
|
||||
} TRenum;
|
||||
|
||||
|
||||
|
||||
extern TRcontext *trNew(void);
|
||||
|
||||
extern void trDelete(TRcontext *tr);
|
||||
|
||||
|
||||
extern void trTileSize(TRcontext *tr, GLint width, GLint height, GLint border);
|
||||
|
||||
extern void trTileBuffer(TRcontext *tr, GLenum format, GLenum type,
|
||||
GLvoid *image);
|
||||
|
||||
|
||||
extern void trImageSize(TRcontext *tr, GLint width, GLint height);
|
||||
|
||||
extern void trImageBuffer(TRcontext *tr, GLenum format, GLenum type,
|
||||
GLvoid *image);
|
||||
|
||||
|
||||
extern void trRowOrder(TRcontext *tr, TRenum order);
|
||||
|
||||
|
||||
extern GLint trGet(TRcontext *tr, TRenum param);
|
||||
extern GLdouble trGetD(TRcontext *tr, TRenum param);
|
||||
|
||||
|
||||
extern void trOrtho(TRcontext *tr,
|
||||
GLdouble left, GLdouble right,
|
||||
GLdouble bottom, GLdouble top,
|
||||
GLdouble zNear, GLdouble zFar);
|
||||
|
||||
extern void trFrustum(TRcontext *tr,
|
||||
GLdouble left, GLdouble right,
|
||||
GLdouble bottom, GLdouble top,
|
||||
GLdouble zNear, GLdouble zFar);
|
||||
|
||||
extern void trPerspective(TRcontext *tr,
|
||||
GLdouble fovy, GLdouble aspect,
|
||||
GLdouble zNear, GLdouble zFar );
|
||||
|
||||
|
||||
extern void trBeginTile(TRcontext *tr);
|
||||
|
||||
extern int trEndTile(TRcontext *tr);
|
||||
|
||||
|
||||
extern void trRasterPos3f(TRcontext *tr, GLfloat x, GLfloat y, GLfloat z);
|
||||
|
||||
|
||||
|
||||
//#ifdef __cplusplus
|
||||
//}
|
||||
//#endif
|
||||
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user