[46acc71] | 1 | /* $Id: tr.h,v 1.5 1997/07/21 17:34:07 brianp Exp $ */ |
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| 2 | |
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| 3 | /* |
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| 4 | * $Log: tr.h,v $ |
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| 5 | * Revision 1.5 1997/07/21 17:34:07 brianp |
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| 6 | * added tile borders, incremented version to 1.1 |
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| 7 | * |
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| 8 | * Revision 1.4 1997/07/21 15:47:35 brianp |
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| 9 | * renamed all "near" and "far" variables |
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| 10 | * |
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| 11 | * Revision 1.3 1997/04/26 21:23:25 brianp |
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| 12 | * added trRasterPos3f function |
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| 13 | * |
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| 14 | * Revision 1.2 1997/04/19 23:26:10 brianp |
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| 15 | * many API changes |
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| 16 | * |
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| 17 | * Revision 1.1 1997/04/18 21:53:05 brianp |
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| 18 | * Initial revision |
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| 19 | * |
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| 20 | */ |
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| 21 | |
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| 22 | |
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| 23 | /* |
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| 24 | * Tiled Rendering library |
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| 25 | * Version 1.1 |
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| 26 | * Copyright (C) Brian Paul |
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| 27 | * |
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| 28 | * |
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| 29 | * This library allows one to render arbitrarily large images with OpenGL. |
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| 30 | * The basic idea is to break the image into tiles which are rendered one |
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| 31 | * at a time. The tiles are assembled together to form the final, large |
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| 32 | * image. Tiles and images can be of any size. |
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| 33 | * |
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| 34 | * Basic usage: |
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| 35 | * |
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| 36 | * 1. Allocate a tile rendering context: |
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| 37 | * TRcontext t = trNew(); |
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| 38 | * |
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| 39 | * 2. Specify the final image buffer and tile size: |
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| 40 | * GLubyte image[W][H][4] |
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| 41 | * trImageSize(t, W, H); |
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| 42 | * trImageBuffer(t, GL_RGBA, GL_UNSIGNED_BYTE, (GLubyte *) image); |
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| 43 | * |
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| 44 | * 3. Setup your projection: |
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| 45 | * trFrustum(t, left, right, bottom top, near, far); |
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| 46 | * or |
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| 47 | * trOrtho(t, left, right, bottom top, near, far); |
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| 48 | * or |
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| 49 | * trPerspective(t, fovy, aspect, near, far); |
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| 50 | * |
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| 51 | * 4. Render the tiles: |
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| 52 | * do { |
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| 53 | * trBeginTile(t); |
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| 54 | * DrawMyScene(); |
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| 55 | * } while (trEndTile(t)); |
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| 56 | * |
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| 57 | * You provide the DrawMyScene() function which calls glClear() and |
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| 58 | * draws all your stuff. |
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| 59 | * |
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| 60 | * 5. The image array is now complete. Display it, write it to a file, etc. |
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| 61 | * |
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| 62 | * 6. Delete the tile rendering context when finished: |
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| 63 | * trDelete(t); |
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| 64 | * |
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| 65 | */ |
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| 66 | |
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| 67 | |
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| 68 | #ifndef TR_H |
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| 69 | #define TR_H |
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| 70 | |
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| 71 | |
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| 72 | #include <GL/gl.h> |
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| 73 | |
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| 74 | |
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| 75 | #ifdef __cplusplus |
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| 76 | extern "C" { |
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| 77 | #endif |
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| 78 | |
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| 79 | |
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| 80 | #define TR_VERSION "1.1" |
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| 81 | #define TR_MAJOR_VERSION 1 |
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| 82 | #define TR_MINOR_VERSION 1 |
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| 83 | |
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| 84 | |
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| 85 | typedef struct _TRctx TRcontext; |
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| 86 | |
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| 87 | |
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| 88 | typedef enum { |
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| 89 | TR_TILE_WIDTH = 100, |
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| 90 | TR_TILE_HEIGHT, |
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| 91 | TR_TILE_BORDER, |
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| 92 | TR_IMAGE_WIDTH, |
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| 93 | TR_IMAGE_HEIGHT, |
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| 94 | TR_ROWS, |
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| 95 | TR_COLUMNS, |
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| 96 | TR_CURRENT_ROW, |
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| 97 | TR_CURRENT_COLUMN, |
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| 98 | TR_CURRENT_TILE_WIDTH, |
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| 99 | TR_CURRENT_TILE_HEIGHT, |
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| 100 | TR_ROW_ORDER, |
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| 101 | TR_TOP_TO_BOTTOM, |
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| 102 | TR_BOTTOM_TO_TOP |
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| 103 | } TRenum; |
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| 104 | |
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| 105 | |
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| 106 | |
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| 107 | extern TRcontext *trNew(void); |
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| 108 | |
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| 109 | extern void trDelete(TRcontext *tr); |
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| 110 | |
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| 111 | |
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| 112 | extern void trTileSize(TRcontext *tr, GLint width, GLint height, GLint border); |
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| 113 | |
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| 114 | extern void trTileBuffer(TRcontext *tr, GLenum format, GLenum type, |
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| 115 | GLvoid *image); |
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| 116 | |
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| 117 | |
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| 118 | extern void trImageSize(TRcontext *tr, GLint width, GLint height); |
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| 119 | |
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| 120 | extern void trImageBuffer(TRcontext *tr, GLenum format, GLenum type, |
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| 121 | GLvoid *image); |
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| 122 | |
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| 123 | |
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| 124 | extern void trRowOrder(TRcontext *tr, TRenum order); |
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| 125 | |
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| 126 | |
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| 127 | extern GLint trGet(TRcontext *tr, TRenum param); |
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| 128 | |
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| 129 | |
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| 130 | extern void trOrtho(TRcontext *tr, |
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| 131 | GLdouble left, GLdouble right, |
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| 132 | GLdouble bottom, GLdouble top, |
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| 133 | GLdouble zNear, GLdouble zFar); |
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| 134 | |
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| 135 | extern void trFrustum(TRcontext *tr, |
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| 136 | GLdouble left, GLdouble right, |
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| 137 | GLdouble bottom, GLdouble top, |
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| 138 | GLdouble zNear, GLdouble zFar); |
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| 139 | |
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| 140 | extern void trPerspective(TRcontext *tr, |
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| 141 | GLdouble fovy, GLdouble aspect, |
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| 142 | GLdouble zNear, GLdouble zFar ); |
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| 143 | |
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| 144 | |
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| 145 | extern void trBeginTile(TRcontext *tr); |
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| 146 | |
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| 147 | extern int trEndTile(TRcontext *tr); |
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| 148 | |
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| 149 | |
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| 150 | extern void trRasterPos3f(TRcontext *tr, GLfloat x, GLfloat y, GLfloat z); |
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| 151 | |
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| 152 | |
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| 153 | |
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| 154 | #ifdef __cplusplus |
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| 155 | } |
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| 156 | #endif |
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| 157 | |
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| 158 | |
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| 159 | #endif |
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