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 #include "glformats.h"
  39
  40
  41 #if FEATURE_drawpix
  42
  43
  44 /*
  45  * Execute glDrawPixels
  46  */
  47 static void GLAPIENTRY
  48 _mesa_DrawPixels( GLsizei width, GLsizei height,
  49                   GLenum format, GLenum type, const GLvoid *pixels )
  50 {
  51    GLenum err;
  52    GET_CURRENT_CONTEXT(ctx);
  53    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  54
  55    if (MESA_VERBOSE & VERBOSE_API)
  56       _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
  57                   width, height,
  58                   _mesa_lookup_enum_by_nr(format),
  59                   _mesa_lookup_enum_by_nr(type),
  60                   pixels,
  61                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
  62                   IROUND(ctx->Current.RasterPos[0]),
  63                   IROUND(ctx->Current.RasterPos[1]));
  64
  65
  66    if (width < 0 || height < 0) {
  67       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
  68       return;
  69    }
  70
  71    /* We're not using the current vertex program, and the driver may install
  72     * its own.  Note: this may dirty some state.
  73     */
  74    _mesa_set_vp_override(ctx, GL_TRUE);
  75
  76    /* Note: this call does state validation */
  77    if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
  78       goto end;      /* the error code was recorded */
  79    }
  80
  81    /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
  82     * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
  83     * Rectangles) on page 151 of the GL 3.0 specification:
  84     *
  85     *     "If format contains integer components, as shown in table 3.6, an
  86     *      INVALID OPERATION error is generated."
  87     *
  88     * Since DrawPixels rendering would be merely undefined if not an error (due
  89     * to a lack of defined mapping from integer data to gl_Color fragment shader
  90     * input), NVIDIA's implementation also just returns this error despite
  91     * exposing GL_EXT_texture_integer, just return an error regardless.
  92     */
  93    if (_mesa_is_enum_format_integer(format)) {
  94       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
  95       goto end;
  96    }
  97
  98    err = _mesa_error_check_format_and_type(ctx, format, type);
  99    if (err != GL_NO_ERROR) {
 100       _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
 101                   _mesa_lookup_enum_by_nr(format),
 102                   _mesa_lookup_enum_by_nr(type));
 103       goto end;
 104    }
 105
 106    /* do special format-related checks */
 107    switch (format) {
 108    case GL_STENCIL_INDEX:
 109    case GL_DEPTH_COMPONENT:
 110    case GL_DEPTH_STENCIL_EXT:
 111       /* these buffers must exist */
 112       if (!_mesa_dest_buffer_exists(ctx, format)) {
 113          _mesa_error(ctx, GL_INVALID_OPERATION,
 114                      "glDrawPixels(missing deest buffer)");
 115          goto end;
 116       }
 117       break;
 118    case GL_COLOR_INDEX:
 119       if (ctx->PixelMaps.ItoR.Size == 0 ||
 120           ctx->PixelMaps.ItoG.Size == 0 ||
 121           ctx->PixelMaps.ItoB.Size == 0) {
 122          _mesa_error(ctx, GL_INVALID_OPERATION,
 123                 "glDrawPixels(drawing color index pixels into RGB buffer)");
 124          goto end;
 125       }
 126       break;
 127    default:
 128       /* for color formats it's not an error if the destination color
 129        * buffer doesn't exist.
 130        */
 131       break;
 132    }
 133
 134    if (ctx->RasterDiscard) {
 135       goto end;
 136    }
 137
 138    if (!ctx->Current.RasterPosValid) {
 139       goto end;  /* no-op, not an error */
 140    }
 141
 142    if (ctx->RenderMode == GL_RENDER) {
 143       if (width > 0 && height > 0) {
 144          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 145          GLint x = IROUND(ctx->Current.RasterPos[0]);
 146          GLint y = IROUND(ctx->Current.RasterPos[1]);
 147
 148          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 149             /* unpack from PBO */
 150             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 151                                            1, format, type, INT_MAX, pixels)) {
 152                _mesa_error(ctx, GL_INVALID_OPERATION,
 153                            "glDrawPixels(invalid PBO access)");
 154                goto end;
 155             }
 156             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 157                /* buffer is mapped - that's an error */
 158                _mesa_error(ctx, GL_INVALID_OPERATION,
 159                            "glDrawPixels(PBO is mapped)");
 160                goto end;
 161             }
 162          }
 163
 164          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 165                                 &ctx->Unpack, pixels);
 166       }
 167    }
 168    else if (ctx->RenderMode == GL_FEEDBACK) {
 169       /* Feedback the current raster pos info */
 170       FLUSH_CURRENT( ctx, 0 );
 171       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 172       _mesa_feedback_vertex( ctx,
 173                              ctx->Current.RasterPos,
 174                              ctx->Current.RasterColor,
 175                              ctx->Current.RasterTexCoords[0] );
 176    }
 177    else {
 178       ASSERT(ctx->RenderMode == GL_SELECT);
 179       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 180    }
 181
 182 end:
 183    _mesa_set_vp_override(ctx, GL_FALSE);
 184
 185    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 186       _mesa_flush(ctx);
 187    }
 188 }
 189
 190
 191 static void GLAPIENTRY
 192 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 193                   GLenum type )
 194 {
 195    GET_CURRENT_CONTEXT(ctx);
 196    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 197
 198    if (MESA_VERBOSE & VERBOSE_API)
 199       _mesa_debug(ctx,
 200                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
 201                   srcx, srcy, width, height,
 202                   _mesa_lookup_enum_by_nr(type),
 203                   _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
 204                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
 205                   IROUND(ctx->Current.RasterPos[0]),
 206                   IROUND(ctx->Current.RasterPos[1]));
 207
 208    if (width < 0 || height < 0) {
 209       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 210       return;
 211    }
 212
 213    /* Note: more detailed 'type' checking is done by the
 214     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 215     * check if the stencil buffer exists, etc.
 216     */
 217    if (type != GL_COLOR &&
 218        type != GL_DEPTH &&
 219        type != GL_STENCIL &&
 220        type != GL_DEPTH_STENCIL) {
 221       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 222                   _mesa_lookup_enum_by_nr(type));
 223       return;
 224    }
 225
 226    /* We're not using the current vertex program, and the driver may install
 227     * it's own.  Note: this may dirty some state.
 228     */
 229    _mesa_set_vp_override(ctx, GL_TRUE);
 230
 231    /* Note: this call does state validation */
 232    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 233       goto end;      /* the error code was recorded */
 234    }
 235
 236    /* Check read buffer's status (draw buffer was already checked) */
 237    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 238       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 239                   "glCopyPixels(incomplete framebuffer)" );
 240       goto end;
 241    }
 242
 243    if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) {
 244       _mesa_error(ctx, GL_INVALID_OPERATION,
 245                   "glCopyPixels(multisample FBO)");
 246       goto end;
 247    }
 248
 249    if (!_mesa_source_buffer_exists(ctx, type) ||
 250        !_mesa_dest_buffer_exists(ctx, type)) {
 251       _mesa_error(ctx, GL_INVALID_OPERATION,
 252                   "glCopyPixels(missing source or dest buffer)");
 253       goto end;
 254    }
 255
 256    if (ctx->RasterDiscard) {
 257       goto end;
 258    }
 259
 260    if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
 261       goto end; /* no-op, not an error */
 262    }
 263
 264    if (ctx->RenderMode == GL_RENDER) {
 265       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 266       if (width > 0 && height > 0) {
 267          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 268          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 269          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 270                                  type );
 271       }
 272    }
 273    else if (ctx->RenderMode == GL_FEEDBACK) {
 274       FLUSH_CURRENT( ctx, 0 );
 275       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 276       _mesa_feedback_vertex( ctx,
 277                              ctx->Current.RasterPos,
 278                              ctx->Current.RasterColor,
 279                              ctx->Current.RasterTexCoords[0] );
 280    }
 281    else {
 282       ASSERT(ctx->RenderMode == GL_SELECT);
 283       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 284    }
 285
 286 end:
 287    _mesa_set_vp_override(ctx, GL_FALSE);
 288
 289    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 290       _mesa_flush(ctx);
 291    }
 292 }
 293
 294
 295 static void GLAPIENTRY
 296 _mesa_Bitmap( GLsizei width, GLsizei height,
 297               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 298               const GLubyte *bitmap )
 299 {
 300    GET_CURRENT_CONTEXT(ctx);
 301    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 302
 303    if (width < 0 || height < 0) {
 304       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 305       return;
 306    }
 307
 308    if (!ctx->Current.RasterPosValid) {
 309       return;    /* do nothing */
 310    }
 311
 312    /* Note: this call does state validation */
 313    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 314       /* the error code was recorded */
 315       return;
 316    }
 317
 318    if (ctx->RasterDiscard)
 319       return;
 320
 321    if (ctx->RenderMode == GL_RENDER) {
 322       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 323       if (width > 0 && height > 0) {
 324          const GLfloat epsilon = 0.0001F;
 325          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 326          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 327
 328          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 329             /* unpack from PBO */
 330             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 331                                            1, GL_COLOR_INDEX, GL_BITMAP,
 332                                            INT_MAX, (const GLvoid *) bitmap)) {
 333                _mesa_error(ctx, GL_INVALID_OPERATION,
 334                            "glBitmap(invalid PBO access)");
 335                return;
 336             }
 337             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 338                /* buffer is mapped - that's an error */
 339                _mesa_error(ctx, GL_INVALID_OPERATION,
 340                            "glBitmap(PBO is mapped)");
 341                return;
 342             }
 343          }
 344
 345          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 346       }
 347    }
 348 #if _HAVE_FULL_GL
 349    else if (ctx->RenderMode == GL_FEEDBACK) {
 350       FLUSH_CURRENT(ctx, 0);
 351       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 352       _mesa_feedback_vertex( ctx,
 353                              ctx->Current.RasterPos,
 354                              ctx->Current.RasterColor,
 355                              ctx->Current.RasterTexCoords[0] );
 356    }
 357    else {
 358       ASSERT(ctx->RenderMode == GL_SELECT);
 359       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 360    }
 361 #endif
 362
 363    /* update raster position */
 364    ctx->Current.RasterPos[0] += xmove;
 365    ctx->Current.RasterPos[1] += ymove;
 366
 367    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 368       _mesa_flush(ctx);
 369    }
 370 }
 371
 372
 373 void
 374 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 375 {
 376    SET_Bitmap(disp, _mesa_Bitmap);
 377    SET_CopyPixels(disp, _mesa_CopyPixels);
 378    SET_DrawPixels(disp, _mesa_DrawPixels);
 379 }
 380
 381
 382 #endif /* FEATURE_drawpix */