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 "mfeatures.h"
  35 #include "pbo.h"
  36 #include "state.h"
  37 #include "dispatch.h"
  38
  39
  40 #if FEATURE_drawpix
  41
  42
  43 /*
  44  * Execute glDrawPixels
  45  */
  46 static void GLAPIENTRY
  47 _mesa_DrawPixels( GLsizei width, GLsizei height,
  48                   GLenum format, GLenum type, const GLvoid *pixels )
  49 {
  50    GLenum err;
  51    GET_CURRENT_CONTEXT(ctx);
  52    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  53
  54    if (MESA_VERBOSE & VERBOSE_API)
  55       _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
  56                   width, height,
  57                   _mesa_lookup_enum_by_nr(format),
  58                   _mesa_lookup_enum_by_nr(type),
  59                   pixels,
  60                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
  61                   IROUND(ctx->Current.RasterPos[0]),
  62                   IROUND(ctx->Current.RasterPos[1]));
  63
  64
  65    if (width < 0 || height < 0) {
  66       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
  67       return;
  68    }
  69
  70    /* We're not using the current vertex program, and the driver may install
  71     * its own.  Note: this may dirty some state.
  72     */
  73    _mesa_set_vp_override(ctx, GL_TRUE);
  74
  75    /* Note: this call does state validation */
  76    if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
  77       goto end;      /* the error code was recorded */
  78    }
  79
  80    /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
  81     * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
  82     * Rectangles) on page 151 of the GL 3.0 specification:
  83     *
  84     *     "If format contains integer components, as shown in table 3.6, an
  85     *      INVALID OPERATION error is generated."
  86     *
  87     * Since DrawPixels rendering would be merely undefined if not an error (due
  88     * to a lack of defined mapping from integer data to gl_Color fragment shader
  89     * input), NVIDIA's implementation also just returns this error despite
  90     * exposing GL_EXT_texture_integer, just return an error regardless.
  91     */
  92    if (_mesa_is_integer_format(format)) {
  93       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
  94       goto end;
  95    }
  96
  97    err = _mesa_error_check_format_and_type(ctx, format, type);
  98    if (err != GL_NO_ERROR) {
  99       _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
 100                   _mesa_lookup_enum_by_nr(format),
 101                   _mesa_lookup_enum_by_nr(type));
 102       goto end;
 103    }
 104
 105    /* do special format-related checks */
 106    switch (format) {
 107    case GL_STENCIL_INDEX:
 108    case GL_DEPTH_COMPONENT:
 109    case GL_DEPTH_STENCIL_EXT:
 110       /* these buffers must exist */
 111       if (!_mesa_dest_buffer_exists(ctx, format)) {
 112          _mesa_error(ctx, GL_INVALID_OPERATION,
 113                      "glDrawPixels(missing deest buffer)");
 114          goto end;
 115       }
 116       break;
 117    case GL_COLOR_INDEX:
 118       if (ctx->PixelMaps.ItoR.Size == 0 ||
 119           ctx->PixelMaps.ItoG.Size == 0 ||
 120           ctx->PixelMaps.ItoB.Size == 0) {
 121          _mesa_error(ctx, GL_INVALID_OPERATION,
 122                 "glDrawPixels(drawing color index pixels into RGB buffer)");
 123          goto end;
 124       }
 125       break;
 126    default:
 127       /* for color formats it's not an error if the destination color
 128        * buffer doesn't exist.
 129        */
 130       break;
 131    }
 132
 133    if (ctx->RasterDiscard) {
 134       goto end;
 135    }
 136
 137    if (!ctx->Current.RasterPosValid) {
 138       goto end;  /* no-op, not an error */
 139    }
 140
 141    if (ctx->RenderMode == GL_RENDER) {
 142       if (width > 0 && height > 0) {
 143          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 144          GLint x = IROUND(ctx->Current.RasterPos[0]);
 145          GLint y = IROUND(ctx->Current.RasterPos[1]);
 146
 147          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 148             /* unpack from PBO */
 149             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 150                                            1, format, type, INT_MAX, pixels)) {
 151                _mesa_error(ctx, GL_INVALID_OPERATION,
 152                            "glDrawPixels(invalid PBO access)");
 153                goto end;
 154             }
 155             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 156                /* buffer is mapped - that's an error */
 157                _mesa_error(ctx, GL_INVALID_OPERATION,
 158                            "glDrawPixels(PBO is mapped)");
 159                goto end;
 160             }
 161          }
 162
 163          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 164                                 &ctx->Unpack, pixels);
 165       }
 166    }
 167    else if (ctx->RenderMode == GL_FEEDBACK) {
 168       /* Feedback the current raster pos info */
 169       FLUSH_CURRENT( ctx, 0 );
 170       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 171       _mesa_feedback_vertex( ctx,
 172                              ctx->Current.RasterPos,
 173                              ctx->Current.RasterColor,
 174                              ctx->Current.RasterTexCoords[0] );
 175    }
 176    else {
 177       ASSERT(ctx->RenderMode == GL_SELECT);
 178       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 179    }
 180
 181 end:
 182    _mesa_set_vp_override(ctx, GL_FALSE);
 183 }
 184
 185
 186 static void GLAPIENTRY
 187 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 188                   GLenum type )
 189 {
 190    GET_CURRENT_CONTEXT(ctx);
 191    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 192
 193    if (MESA_VERBOSE & VERBOSE_API)
 194       _mesa_debug(ctx,
 195                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
 196                   srcx, srcy, width, height,
 197                   _mesa_lookup_enum_by_nr(type),
 198                   _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
 199                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
 200                   IROUND(ctx->Current.RasterPos[0]),
 201                   IROUND(ctx->Current.RasterPos[1]));
 202
 203    if (width < 0 || height < 0) {
 204       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 205       return;
 206    }
 207
 208    /* Note: more detailed 'type' checking is done by the
 209     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 210     * check if the stencil buffer exists, etc.
 211     */
 212    if (type != GL_COLOR &&
 213        type != GL_DEPTH &&
 214        type != GL_STENCIL &&
 215        type != GL_DEPTH_STENCIL) {
 216       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 217                   _mesa_lookup_enum_by_nr(type));
 218       return;
 219    }
 220
 221    /* We're not using the current vertex program, and the driver may install
 222     * it's own.  Note: this may dirty some state.
 223     */
 224    _mesa_set_vp_override(ctx, GL_TRUE);
 225
 226    /* Note: this call does state validation */
 227    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 228       goto end;      /* the error code was recorded */
 229    }
 230
 231    /* Check read buffer's status (draw buffer was already checked) */
 232    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 233       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 234                   "glCopyPixels(incomplete framebuffer)" );
 235       goto end;
 236    }
 237
 238    if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) {
 239       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION,
 240                   "glCopyPixels(multisample FBO)");
 241       goto end;
 242    }
 243
 244    if (!_mesa_source_buffer_exists(ctx, type) ||
 245        !_mesa_dest_buffer_exists(ctx, type)) {
 246       _mesa_error(ctx, GL_INVALID_OPERATION,
 247                   "glCopyPixels(missing source or dest buffer)");
 248       goto end;
 249    }
 250
 251    if (ctx->RasterDiscard) {
 252       goto end;
 253    }
 254
 255    if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
 256       goto end; /* no-op, not an error */
 257    }
 258
 259    if (ctx->RenderMode == GL_RENDER) {
 260       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 261       if (width > 0 && height > 0) {
 262          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 263          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 264          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 265                                  type );
 266       }
 267    }
 268    else if (ctx->RenderMode == GL_FEEDBACK) {
 269       FLUSH_CURRENT( ctx, 0 );
 270       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 271       _mesa_feedback_vertex( ctx,
 272                              ctx->Current.RasterPos,
 273                              ctx->Current.RasterColor,
 274                              ctx->Current.RasterTexCoords[0] );
 275    }
 276    else {
 277       ASSERT(ctx->RenderMode == GL_SELECT);
 278       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 279    }
 280
 281 end:
 282    _mesa_set_vp_override(ctx, GL_FALSE);
 283 }
 284
 285
 286 static void GLAPIENTRY
 287 _mesa_Bitmap( GLsizei width, GLsizei height,
 288               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 289               const GLubyte *bitmap )
 290 {
 291    GET_CURRENT_CONTEXT(ctx);
 292    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 293
 294    if (width < 0 || height < 0) {
 295       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 296       return;
 297    }
 298
 299    if (!ctx->Current.RasterPosValid) {
 300       return;    /* do nothing */
 301    }
 302
 303    /* Note: this call does state validation */
 304    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 305       /* the error code was recorded */
 306       return;
 307    }
 308
 309    if (ctx->RasterDiscard)
 310       return;
 311
 312    if (ctx->RenderMode == GL_RENDER) {
 313       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 314       if (width > 0 && height > 0) {
 315          const GLfloat epsilon = 0.0001F;
 316          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 317          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 318
 319          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 320             /* unpack from PBO */
 321             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 322                                            1, GL_COLOR_INDEX, GL_BITMAP,
 323                                            INT_MAX, (const GLvoid *) bitmap)) {
 324                _mesa_error(ctx, GL_INVALID_OPERATION,
 325                            "glBitmap(invalid PBO access)");
 326                return;
 327             }
 328             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 329                /* buffer is mapped - that's an error */
 330                _mesa_error(ctx, GL_INVALID_OPERATION,
 331                            "glBitmap(PBO is mapped)");
 332                return;
 333             }
 334          }
 335
 336          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 337       }
 338    }
 339 #if _HAVE_FULL_GL
 340    else if (ctx->RenderMode == GL_FEEDBACK) {
 341       FLUSH_CURRENT(ctx, 0);
 342       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 343       _mesa_feedback_vertex( ctx,
 344                              ctx->Current.RasterPos,
 345                              ctx->Current.RasterColor,
 346                              ctx->Current.RasterTexCoords[0] );
 347    }
 348    else {
 349       ASSERT(ctx->RenderMode == GL_SELECT);
 350       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 351    }
 352 #endif
 353
 354    /* update raster position */
 355    ctx->Current.RasterPos[0] += xmove;
 356    ctx->Current.RasterPos[1] += ymove;
 357 }
 358
 359
 360 void
 361 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 362 {
 363    SET_Bitmap(disp, _mesa_Bitmap);
 364    SET_CopyPixels(disp, _mesa_CopyPixels);
 365    SET_DrawPixels(disp, _mesa_DrawPixels);
 366 }
 367
 368
 369 #endif /* FEATURE_drawpix */