reactos/lib/mesa32/GL/osmesa.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  4.1
   4  *
   5  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /*
  27  * Mesa Off-Screen rendering interface.
  28  *
  29  * This is an operating system and window system independent interface to
  30  * Mesa which allows one to render images into a client-supplied buffer in
  31  * main memory.  Such images may manipulated or saved in whatever way the
  32  * client wants.
  33  *
  34  * These are the API functions:
  35  *   OSMesaCreateContext - create a new Off-Screen Mesa rendering context
  36  *   OSMesaMakeCurrent - bind an OSMesaContext to a client's image buffer
  37  *                       and make the specified context the current one.
  38  *   OSMesaDestroyContext - destroy an OSMesaContext
  39  *   OSMesaGetCurrentContext - return thread's current context ID
  40  *   OSMesaPixelStore - controls how pixels are stored in image buffer
  41  *   OSMesaGetIntegerv - return OSMesa state parameters
  42  *
  43  *
  44  * The limits on the width and height of an image buffer are MAX_WIDTH and
  45  * MAX_HEIGHT as defined in Mesa/src/config.h.  Defaults are 1280 and 1024.
  46  * You can increase them as needed but beware that many temporary arrays in
  47  * Mesa are dimensioned by MAX_WIDTH or MAX_HEIGHT.
  48  */
  49
  50
  51 #ifndef OSMESA_H
  52 #define OSMESA_H
  53
  54
  55 #ifdef __cplusplus
  56 extern "C" {
  57 #endif
  58
  59
  60 #include <GL/gl.h>
  61
  62
  63 #define OSMESA_MAJOR_VERSION 4
  64 #define OSMESA_MINOR_VERSION 1
  65 #define OSMESA_PATCH_VERSION 0
  66
  67
  68
  69 /*
  70  * Values for the format parameter of OSMesaCreateContext()
  71  * New in version 2.0.
  72  */
  73 #define OSMESA_COLOR_INDEX      GL_COLOR_INDEX
  74 #define OSMESA_RGBA             GL_RGBA
  75 #define OSMESA_BGRA             0x1
  76 #define OSMESA_ARGB             0x2
  77 #define OSMESA_RGB              GL_RGB
  78 #define OSMESA_BGR              0x4
  79 #define OSMESA_RGB_565          0x5
  80
  81
  82 /*
  83  * OSMesaPixelStore() parameters:
  84  * New in version 2.0.
  85  */
  86 #define OSMESA_ROW_LENGTH       0x10
  87 #define OSMESA_Y_UP             0x11
  88
  89
  90 /*
  91  * Accepted by OSMesaGetIntegerv:
  92  */
  93 #define OSMESA_WIDTH            0x20
  94 #define OSMESA_HEIGHT           0x21
  95 #define OSMESA_FORMAT           0x22
  96 #define OSMESA_TYPE             0x23
  97 #define OSMESA_MAX_WIDTH        0x24  /* new in 4.0 */
  98 #define OSMESA_MAX_HEIGHT       0x25  /* new in 4.0 */
  99
 100
 101 typedef struct osmesa_context *OSMesaContext;
 102
 103
 104 #if defined(__BEOS__) || defined(__QUICKDRAW__)
 105 #pragma export on
 106 #endif
 107
 108
 109 /*
 110  * Create an Off-Screen Mesa rendering context.  The only attribute needed is
 111  * an RGBA vs Color-Index mode flag.
 112  *
 113  * Input:  format - one of OSMESA_COLOR_INDEX, OSMESA_RGBA, OSMESA_BGRA,
 114  *                  OSMESA_ARGB, OSMESA_RGB, or OSMESA_BGR.
 115  *         sharelist - specifies another OSMesaContext with which to share
 116  *                     display lists.  NULL indicates no sharing.
 117  * Return:  an OSMesaContext or 0 if error
 118  */
 119 GLAPI OSMesaContext GLAPIENTRY
 120 OSMesaCreateContext( GLenum format, OSMesaContext sharelist );
 121
 122
 123
 124 /*
 125  * Create an Off-Screen Mesa rendering context and specify desired
 126  * size of depth buffer, stencil buffer and accumulation buffer.
 127  * If you specify zero for depthBits, stencilBits, accumBits you
 128  * can save some memory.
 129  *
 130  * New in Mesa 3.5
 131  */
 132 GLAPI OSMesaContext GLAPIENTRY
 133 OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
 134                         GLint accumBits, OSMesaContext sharelist);
 135
 136
 137 /*
 138  * Destroy an Off-Screen Mesa rendering context.
 139  *
 140  * Input:  ctx - the context to destroy
 141  */
 142 GLAPI void GLAPIENTRY
 143 OSMesaDestroyContext( OSMesaContext ctx );
 144
 145
 146
 147 /*
 148  * Bind an OSMesaContext to an image buffer.  The image buffer is just a
 149  * block of memory which the client provides.  Its size must be at least
 150  * as large as width*height*sizeof(type).  Its address should be a multiple
 151  * of 4 if using RGBA mode.
 152  *
 153  * Image data is stored in the order of glDrawPixels:  row-major order
 154  * with the lower-left image pixel stored in the first array position
 155  * (ie. bottom-to-top).
 156  *
 157  * Since the only type initially supported is GL_UNSIGNED_BYTE, if the
 158  * context is in RGBA mode, each pixel will be stored as a 4-byte RGBA
 159  * value.  If the context is in color indexed mode, each pixel will be
 160  * stored as a 1-byte value.
 161  *
 162  * If the context's viewport hasn't been initialized yet, it will now be
 163  * initialized to (0,0,width,height).
 164  *
 165  * Input:  ctx - the rendering context
 166  *         buffer - the image buffer memory
 167  *         type - data type for pixel components, only GL_UNSIGNED_BYTE
 168  *                supported now
 169  *         width, height - size of image buffer in pixels, at least 1
 170  * Return:  GL_TRUE if success, GL_FALSE if error because of invalid ctx,
 171  *          invalid buffer address, type!=GL_UNSIGNED_BYTE, width<1, height<1,
 172  *          width>internal limit or height>internal limit.
 173  */
 174 GLAPI GLboolean GLAPIENTRY
 175 OSMesaMakeCurrent( OSMesaContext ctx, void *buffer, GLenum type,
 176                    GLsizei width, GLsizei height );
 177
 178
 179
 180
 181 /*
 182  * Return the current Off-Screen Mesa rendering context handle.
 183  */
 184 GLAPI OSMesaContext GLAPIENTRY
 185 OSMesaGetCurrentContext( void );
 186
 187
 188
 189 /*
 190  * Set pixel store/packing parameters for the current context.
 191  * This is similar to glPixelStore.
 192  * Input:  pname - OSMESA_ROW_LENGTH
 193  *                    specify actual pixels per row in image buffer
 194  *                    0 = same as image width (default)
 195  *                 OSMESA_Y_UP
 196  *                    zero = Y coordinates increase downward
 197  *                    non-zero = Y coordinates increase upward (default)
 198  *         value - the value for the parameter pname
 199  *
 200  * New in version 2.0.
 201  */
 202 GLAPI void GLAPIENTRY
 203 OSMesaPixelStore( GLint pname, GLint value );
 204
 205
 206
 207 /*
 208  * Return an integer value like glGetIntegerv.
 209  * Input:  pname -
 210  *                 OSMESA_WIDTH  return current image width
 211  *                 OSMESA_HEIGHT  return current image height
 212  *                 OSMESA_FORMAT  return image format
 213  *                 OSMESA_TYPE  return color component data type
 214  *                 OSMESA_ROW_LENGTH return row length in pixels
 215  *                 OSMESA_Y_UP returns 1 or 0 to indicate Y axis direction
 216  *         value - pointer to integer in which to return result.
 217  */
 218 GLAPI void GLAPIENTRY
 219 OSMesaGetIntegerv( GLint pname, GLint *value );
 220
 221
 222
 223 /*
 224  * Return the depth buffer associated with an OSMesa context.
 225  * Input:  c - the OSMesa context
 226  * Output:  width, height - size of buffer in pixels
 227  *          bytesPerValue - bytes per depth value (2 or 4)
 228  *          buffer - pointer to depth buffer values
 229  * Return:  GL_TRUE or GL_FALSE to indicate success or failure.
 230  *
 231  * New in Mesa 2.4.
 232  */
 233 GLAPI GLboolean GLAPIENTRY
 234 OSMesaGetDepthBuffer( OSMesaContext c, GLint *width, GLint *height,
 235                       GLint *bytesPerValue, void **buffer );
 236
 237
 238
 239 /*
 240  * Return the color buffer associated with an OSMesa context.
 241  * Input:  c - the OSMesa context
 242  * Output:  width, height - size of buffer in pixels
 243  *          format - buffer format (OSMESA_FORMAT)
 244  *          buffer - pointer to depth buffer values
 245  * Return:  GL_TRUE or GL_FALSE to indicate success or failure.
 246  *
 247  * New in Mesa 3.3.
 248  */
 249 GLAPI GLboolean GLAPIENTRY
 250 OSMesaGetColorBuffer( OSMesaContext c, GLint *width, GLint *height,
 251                       GLint *format, void **buffer );
 252
 253
 254
 255 /*
 256  * Return pointer to the named function.
 257  *
 258  * New in Mesa 4.1
 259  */
 260 GLAPI void * GLAPIENTRY
 261 OSMesaGetProcAddress( const char *funcName );
 262
 263
 264 #if defined(__BEOS__) || defined(__QUICKDRAW__)
 265 #pragma export off
 266 #endif
 267
 268
 269 #ifdef __cplusplus
 270 }
 271 #endif
 272
 273
 274 #endif