reactos/dll/opengl/mesa/main/pixelstore.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  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  * \file pixelstore.c
  27  * glPixelStore functions.
  28  */
  29
  30
  31 #include "glheader.h"
  32 #include "bufferobj.h"
  33 #include "context.h"
  34 #include "pixelstore.h"
  35 #include "mfeatures.h"
  36 #include "mtypes.h"
  37
  38
  39 void GLAPIENTRY
  40 _mesa_PixelStorei( GLenum pname, GLint param )
  41 {
  42    /* NOTE: this call can't be compiled into the display list */
  43    GET_CURRENT_CONTEXT(ctx);
  44    ASSERT_OUTSIDE_BEGIN_END(ctx);
  45
  46    switch (pname) {
  47       case GL_PACK_SWAP_BYTES:
  48          if (param == (GLint)ctx->Pack.SwapBytes)
  49             return;
  50          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
  51          ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
  52          break;
  53       case GL_PACK_LSB_FIRST:
  54          if (param == (GLint)ctx->Pack.LsbFirst)
  55             return;
  56          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
  57          ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
  58          break;
  59       case GL_PACK_ROW_LENGTH:
  60          if (param<0) {
  61             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  62             return;
  63          }
  64          if (ctx->Pack.RowLength == param)
  65             return;
  66          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
  67          ctx->Pack.RowLength = param;
  68          break;
  69       case GL_PACK_IMAGE_HEIGHT:
  70          if (param<0) {
  71             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  72             return;
  73          }
  74          if (ctx->Pack.ImageHeight == param)
  75             return;
  76          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
  77          ctx->Pack.ImageHeight = param;
  78          break;
  79       case GL_PACK_SKIP_PIXELS:
  80          if (param<0) {
  81             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  82             return;
  83          }
  84          if (ctx->Pack.SkipPixels == param)
  85             return;
  86          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
  87          ctx->Pack.SkipPixels = param;
  88          break;
  89       case GL_PACK_SKIP_ROWS:
  90          if (param<0) {
  91             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  92             return;
  93          }
  94          if (ctx->Pack.SkipRows == param)
  95             return;
  96          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
  97          ctx->Pack.SkipRows = param;
  98          break;
  99       case GL_PACK_SKIP_IMAGES:
 100          if (param<0) {
 101             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 102             return;
 103          }
 104          if (ctx->Pack.SkipImages == param)
 105             return;
 106          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 107          ctx->Pack.SkipImages = param;
 108          break;
 109       case GL_PACK_ALIGNMENT:
 110          if (param!=1 && param!=2 && param!=4 && param!=8) {
 111             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 112             return;
 113          }
 114          if (ctx->Pack.Alignment == param)
 115             return;
 116          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 117          ctx->Pack.Alignment = param;
 118          break;
 119       case GL_PACK_INVERT_MESA:
 120          if (!ctx->Extensions.MESA_pack_invert) {
 121             _mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" );
 122             return;
 123          }
 124          if (ctx->Pack.Invert == param)
 125             return;
 126          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 127          ctx->Pack.Invert = param;
 128          break;
 129
 130       case GL_UNPACK_SWAP_BYTES:
 131          if (param == (GLint)ctx->Unpack.SwapBytes)
 132             return;
 133          if ((GLint)ctx->Unpack.SwapBytes == param)
 134             return;
 135          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 136          ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
 137          break;
 138       case GL_UNPACK_LSB_FIRST:
 139          if (param == (GLint)ctx->Unpack.LsbFirst)
 140             return;
 141          if ((GLint)ctx->Unpack.LsbFirst == param)
 142             return;
 143          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 144          ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
 145          break;
 146       case GL_UNPACK_ROW_LENGTH:
 147          if (param<0) {
 148             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 149             return;
 150          }
 151          if (ctx->Unpack.RowLength == param)
 152             return;
 153          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 154          ctx->Unpack.RowLength = param;
 155          break;
 156       case GL_UNPACK_IMAGE_HEIGHT:
 157          if (param<0) {
 158             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 159             return;
 160          }
 161          if (ctx->Unpack.ImageHeight == param)
 162             return;
 163
 164          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 165          ctx->Unpack.ImageHeight = param;
 166          break;
 167       case GL_UNPACK_SKIP_PIXELS:
 168          if (param<0) {
 169             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 170             return;
 171          }
 172          if (ctx->Unpack.SkipPixels == param)
 173             return;
 174          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 175          ctx->Unpack.SkipPixels = param;
 176          break;
 177       case GL_UNPACK_SKIP_ROWS:
 178          if (param<0) {
 179             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 180             return;
 181          }
 182          if (ctx->Unpack.SkipRows == param)
 183             return;
 184          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 185          ctx->Unpack.SkipRows = param;
 186          break;
 187       case GL_UNPACK_SKIP_IMAGES:
 188          if (param < 0) {
 189             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 190             return;
 191          }
 192          if (ctx->Unpack.SkipImages == param)
 193             return;
 194          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 195          ctx->Unpack.SkipImages = param;
 196          break;
 197       case GL_UNPACK_ALIGNMENT:
 198          if (param!=1 && param!=2 && param!=4 && param!=8) {
 199             _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
 200             return;
 201          }
 202          if (ctx->Unpack.Alignment == param)
 203             return;
 204          FLUSH_VERTICES(ctx, _NEW_PACKUNPACK);
 205          ctx->Unpack.Alignment = param;
 206          break;
 207       default:
 208          _mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
 209          return;
 210    }
 211 }
 212
 213
 214 void GLAPIENTRY
 215 _mesa_PixelStoref( GLenum pname, GLfloat param )
 216 {
 217    _mesa_PixelStorei( pname, IROUND(param) );
 218 }
 219
 220
 221
 222 /**
 223  * Initialize the context's pixel store state.
 224  */
 225 void
 226 _mesa_init_pixelstore( struct gl_context *ctx )
 227 {
 228    /* Pixel transfer */
 229    ctx->Pack.Alignment = 4;
 230    ctx->Pack.RowLength = 0;
 231    ctx->Pack.ImageHeight = 0;
 232    ctx->Pack.SkipPixels = 0;
 233    ctx->Pack.SkipRows = 0;
 234    ctx->Pack.SkipImages = 0;
 235    ctx->Pack.SwapBytes = GL_FALSE;
 236    ctx->Pack.LsbFirst = GL_FALSE;
 237    ctx->Pack.Invert = GL_FALSE;
 238 #if FEATURE_EXT_pixel_buffer_object
 239    _mesa_reference_buffer_object(ctx, &ctx->Pack.BufferObj,
 240                                  ctx->Shared->NullBufferObj);
 241 #endif
 242    ctx->Unpack.Alignment = 4;
 243    ctx->Unpack.RowLength = 0;
 244    ctx->Unpack.ImageHeight = 0;
 245    ctx->Unpack.SkipPixels = 0;
 246    ctx->Unpack.SkipRows = 0;
 247    ctx->Unpack.SkipImages = 0;
 248    ctx->Unpack.SwapBytes = GL_FALSE;
 249    ctx->Unpack.LsbFirst = GL_FALSE;
 250    ctx->Unpack.Invert = GL_FALSE;
 251 #if FEATURE_EXT_pixel_buffer_object
 252    _mesa_reference_buffer_object(ctx, &ctx->Unpack.BufferObj,
 253                                  ctx->Shared->NullBufferObj);
 254 #endif
 255
 256    /*
 257     * _mesa_unpack_image() returns image data in this format.  When we
 258     * execute image commands (glDrawPixels(), glTexImage(), etc) from
 259     * within display lists we have to be sure to set the current
 260     * unpacking parameters to these values!
 261     */
 262    ctx->DefaultPacking.Alignment = 1;
 263    ctx->DefaultPacking.RowLength = 0;
 264    ctx->DefaultPacking.SkipPixels = 0;
 265    ctx->DefaultPacking.SkipRows = 0;
 266    ctx->DefaultPacking.ImageHeight = 0;
 267    ctx->DefaultPacking.SkipImages = 0;
 268    ctx->DefaultPacking.SwapBytes = GL_FALSE;
 269    ctx->DefaultPacking.LsbFirst = GL_FALSE;
 270    ctx->DefaultPacking.Invert = GL_FALSE;
 271 #if FEATURE_EXT_pixel_buffer_object
 272    _mesa_reference_buffer_object(ctx, &ctx->DefaultPacking.BufferObj,
 273                                  ctx->Shared->NullBufferObj);
 274 #endif
 275 }