src/mesa/main/drawpix.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 #include "glheader.h"
  26 #include "imports.h"
  27 #include "bufferobj.h"
  28 #include "context.h"
  29 #include "drawpix.h"
  30 #include "enums.h"
  31 #include "feedback.h"
  32 #include "framebuffer.h"
  33 #include "image.h"
  34 #include "readpix.h"
  35 #include "state.h"
  36 #include "glapi/dispatch.h"
  37
  38
  39 #if FEATURE_drawpix
  40
  41
  42 /**
  43  * If a fragment program is enabled, check that it's valid.
  44  * \return GL_TRUE if valid, GL_FALSE otherwise
  45  */
  46 static GLboolean
  47 valid_fragment_program(GLcontext *ctx)
  48 {
  49    return !(ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled);
  50 }
  51
  52
  53 /*
  54  * Execute glDrawPixels
  55  */
  56 static void GLAPIENTRY
  57 _mesa_DrawPixels( GLsizei width, GLsizei height,
  58                   GLenum format, GLenum type, const GLvoid *pixels )
  59 {
  60    GET_CURRENT_CONTEXT(ctx);
  61    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  62
  63    if (width < 0 || height < 0) {
  64       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
  65       return;
  66    }
  67
  68    /* We're not using the current vertex program, and the driver may install
  69     * it's own.
  70     */
  71    _mesa_set_vp_override(ctx, GL_TRUE);
  72
  73    if (ctx->NewState) {
  74       _mesa_update_state(ctx);
  75    }
  76
  77    if (!valid_fragment_program(ctx)) {
  78       _mesa_error(ctx, GL_INVALID_OPERATION,
  79                   "glDrawPixels (invalid fragment program)");
  80       goto end;
  81    }
  82
  83    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  84       /* the error was already recorded */
  85       goto end;
  86    }
  87
  88    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  89       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
  90                   "glDrawPixels(incomplete framebuffer)" );
  91       goto end;
  92    }
  93
  94    if (!ctx->Current.RasterPosValid) {
  95       goto end; /* no-op, not an error */
  96    }
  97
  98    if (ctx->RenderMode == GL_RENDER) {
  99       if (width > 0 && height > 0) {
 100          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 101          GLint x = IROUND(ctx->Current.RasterPos[0]);
 102          GLint y = IROUND(ctx->Current.RasterPos[1]);
 103
 104          if (ctx->Unpack.BufferObj->Name) {
 105             /* unpack from PBO */
 106             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 107                                            format, type, pixels)) {
 108                _mesa_error(ctx, GL_INVALID_OPERATION,
 109                            "glDrawPixels(invalid PBO access)");
 110                goto end;
 111             }
 112             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 113                /* buffer is mapped - that's an error */
 114                _mesa_error(ctx, GL_INVALID_OPERATION,
 115                            "glDrawPixels(PBO is mapped)");
 116                goto end;
 117             }
 118          }
 119
 120          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 121                                 &ctx->Unpack, pixels);
 122       }
 123    }
 124    else if (ctx->RenderMode == GL_FEEDBACK) {
 125       /* Feedback the current raster pos info */
 126       FLUSH_CURRENT( ctx, 0 );
 127       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 128       _mesa_feedback_vertex( ctx,
 129                              ctx->Current.RasterPos,
 130                              ctx->Current.RasterColor,
 131                              ctx->Current.RasterIndex,
 132                              ctx->Current.RasterTexCoords[0] );
 133    }
 134    else {
 135       ASSERT(ctx->RenderMode == GL_SELECT);
 136       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 137    }
 138
 139 end:
 140    _mesa_set_vp_override(ctx, GL_FALSE);
 141 }
 142
 143
 144 static void GLAPIENTRY
 145 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 146                   GLenum type )
 147 {
 148    GET_CURRENT_CONTEXT(ctx);
 149    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 150
 151    if (width < 0 || height < 0) {
 152       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 153       return;
 154    }
 155
 156    /* Note: more detailed 'type' checking is done by the
 157     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 158     * check if the stencil buffer exists, etc.
 159     */
 160    if (type != GL_COLOR &&
 161        type != GL_DEPTH &&
 162        type != GL_STENCIL &&
 163        type != GL_DEPTH_STENCIL) {
 164       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 165                   _mesa_lookup_enum_by_nr(type));
 166       return;
 167    }
 168
 169    /* We're not using the current vertex program, and the driver may install
 170     * it's own.
 171     */
 172    _mesa_set_vp_override(ctx, GL_TRUE);
 173
 174    if (ctx->NewState) {
 175       _mesa_update_state(ctx);
 176    }
 177
 178    if (!valid_fragment_program(ctx)) {
 179       _mesa_error(ctx, GL_INVALID_OPERATION,
 180                   "glCopyPixels (invalid fragment program)");
 181       goto end;
 182    }
 183
 184    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
 185        ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 186       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 187                   "glCopyPixels(incomplete framebuffer)" );
 188       goto end;
 189    }
 190
 191    if (!_mesa_source_buffer_exists(ctx, type) ||
 192        !_mesa_dest_buffer_exists(ctx, type)) {
 193       _mesa_error(ctx, GL_INVALID_OPERATION,
 194                   "glCopyPixels(missing source or dest buffer)");
 195       goto end;
 196    }
 197
 198    if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
 199       goto end; /* no-op, not an error */
 200    }
 201
 202    if (ctx->RenderMode == GL_RENDER) {
 203       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 204       if (width > 0 && height > 0) {
 205          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 206          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 207          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 208                                  type );
 209       }
 210    }
 211    else if (ctx->RenderMode == GL_FEEDBACK) {
 212       FLUSH_CURRENT( ctx, 0 );
 213       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 214       _mesa_feedback_vertex( ctx,
 215                              ctx->Current.RasterPos,
 216                              ctx->Current.RasterColor,
 217                              ctx->Current.RasterIndex,
 218                              ctx->Current.RasterTexCoords[0] );
 219    }
 220    else {
 221       ASSERT(ctx->RenderMode == GL_SELECT);
 222       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 223    }
 224
 225 end:
 226    _mesa_set_vp_override(ctx, GL_FALSE);
 227 }
 228
 229
 230 static void GLAPIENTRY
 231 _mesa_Bitmap( GLsizei width, GLsizei height,
 232               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 233               const GLubyte *bitmap )
 234 {
 235    GET_CURRENT_CONTEXT(ctx);
 236    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 237
 238    if (width < 0 || height < 0) {
 239       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 240       return;
 241    }
 242
 243    if (!ctx->Current.RasterPosValid) {
 244       return;    /* do nothing */
 245    }
 246
 247    if (ctx->NewState) {
 248       _mesa_update_state(ctx);
 249    }
 250
 251    if (!valid_fragment_program(ctx)) {
 252       _mesa_error(ctx, GL_INVALID_OPERATION,
 253                   "glBitmap (invalid fragment program)");
 254       return;
 255    }
 256
 257    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 258       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 259                   "glBitmap(incomplete framebuffer)");
 260       return;
 261    }
 262
 263    if (ctx->RenderMode == GL_RENDER) {
 264       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 265       if (width > 0 && height > 0) {
 266          const GLfloat epsilon = 0.0001F;
 267          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 268          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 269
 270          if (ctx->Unpack.BufferObj->Name) {
 271             /* unpack from PBO */
 272             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 273                                            GL_COLOR_INDEX, GL_BITMAP,
 274                                            (GLvoid *) bitmap)) {
 275                _mesa_error(ctx, GL_INVALID_OPERATION,
 276                            "glBitmap(invalid PBO access)");
 277                return;
 278             }
 279             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 280                /* buffer is mapped - that's an error */
 281                _mesa_error(ctx, GL_INVALID_OPERATION,
 282                            "glBitmap(PBO is mapped)");
 283                return;
 284             }
 285          }
 286
 287          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 288       }
 289    }
 290 #if _HAVE_FULL_GL
 291    else if (ctx->RenderMode == GL_FEEDBACK) {
 292       FLUSH_CURRENT(ctx, 0);
 293       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 294       _mesa_feedback_vertex( ctx,
 295                              ctx->Current.RasterPos,
 296                              ctx->Current.RasterColor,
 297                              ctx->Current.RasterIndex,
 298                              ctx->Current.RasterTexCoords[0] );
 299    }
 300    else {
 301       ASSERT(ctx->RenderMode == GL_SELECT);
 302       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 303    }
 304 #endif
 305
 306    /* update raster position */
 307    ctx->Current.RasterPos[0] += xmove;
 308    ctx->Current.RasterPos[1] += ymove;
 309 }
 310
 311
 312 void
 313 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 314 {
 315    SET_Bitmap(disp, _mesa_Bitmap);
 316    SET_CopyPixels(disp, _mesa_CopyPixels);
 317    SET_DrawPixels(disp, _mesa_DrawPixels);
 318 }
 319
 320
 321 #endif /* FEATURE_drawpix */