src/mesa/main/drawpix.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "glheader.h"
  26 #include "imports.h"
  27 #include "draw_validate.h"
  28 #include "bufferobj.h"
  29 #include "context.h"
  30 #include "drawpix.h"
  31 #include "enums.h"
  32 #include "feedback.h"
  33 #include "framebuffer.h"
  34 #include "image.h"
  35 #include "pbo.h"
  36 #include "state.h"
  37 #include "glformats.h"
  38 #include "fbobject.h"
  39
  40
  41 /*
  42  * Execute glDrawPixels
  43  */
  44 void GLAPIENTRY
  45 _mesa_DrawPixels( GLsizei width, GLsizei height,
  46                   GLenum format, GLenum type, const GLvoid *pixels )
  47 {
  48    GLenum err;
  49    GET_CURRENT_CONTEXT(ctx);
  50
  51    FLUSH_VERTICES(ctx, 0);
  52
  53    if (MESA_VERBOSE & VERBOSE_API)
  54       _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
  55                   width, height,
  56                   _mesa_enum_to_string(format),
  57                   _mesa_enum_to_string(type),
  58                   pixels,
  59                   _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
  60                   IROUND(ctx->Current.RasterPos[0]),
  61                   IROUND(ctx->Current.RasterPos[1]));
  62
  63
  64    if (width < 0 || height < 0) {
  65       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
  66       return;
  67    }
  68
  69    /* We're not using the current vertex program, and the driver may install
  70     * its own.  Note: this may dirty some state.
  71     */
  72    _mesa_set_vp_override(ctx, GL_TRUE);
  73
  74    /* Note: this call does state validation */
  75    if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
  76       goto end;      /* the error code was recorded */
  77    }
  78
  79    /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
  80     * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
  81     * Rectangles) on page 151 of the GL 3.0 specification:
  82     *
  83     *     "If format contains integer components, as shown in table 3.6, an
  84     *      INVALID OPERATION error is generated."
  85     *
  86     * Since DrawPixels rendering would be merely undefined if not an error (due
  87     * to a lack of defined mapping from integer data to gl_Color fragment shader
  88     * input), NVIDIA's implementation also just returns this error despite
  89     * exposing GL_EXT_texture_integer, just return an error regardless.
  90     */
  91    if (_mesa_is_enum_format_integer(format)) {
  92       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
  93       goto end;
  94    }
  95
  96    err = _mesa_error_check_format_and_type(ctx, format, type);
  97    if (err != GL_NO_ERROR) {
  98       _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
  99                   _mesa_enum_to_string(format),
 100                   _mesa_enum_to_string(type));
 101       goto end;
 102    }
 103
 104    /* do special format-related checks */
 105    switch (format) {
 106    case GL_STENCIL_INDEX:
 107    case GL_DEPTH_COMPONENT:
 108    case GL_DEPTH_STENCIL_EXT:
 109       /* these buffers must exist */
 110       if (!_mesa_dest_buffer_exists(ctx, format)) {
 111          _mesa_error(ctx, GL_INVALID_OPERATION,
 112                      "glDrawPixels(missing dest buffer)");
 113          goto end;
 114       }
 115       break;
 116    case GL_COLOR_INDEX:
 117       if (ctx->PixelMaps.ItoR.Size == 0 ||
 118           ctx->PixelMaps.ItoG.Size == 0 ||
 119           ctx->PixelMaps.ItoB.Size == 0) {
 120          _mesa_error(ctx, GL_INVALID_OPERATION,
 121                 "glDrawPixels(drawing color index pixels into RGB buffer)");
 122          goto end;
 123       }
 124       break;
 125    default:
 126       /* for color formats it's not an error if the destination color
 127        * buffer doesn't exist.
 128        */
 129       break;
 130    }
 131
 132    if (ctx->RasterDiscard) {
 133       goto end;
 134    }
 135
 136    if (!ctx->Current.RasterPosValid) {
 137       goto end;  /* no-op, not an error */
 138    }
 139
 140    if (ctx->RenderMode == GL_RENDER) {
 141       if (width > 0 && height > 0) {
 142          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 143          GLint x = IROUND(ctx->Current.RasterPos[0]);
 144          GLint y = IROUND(ctx->Current.RasterPos[1]);
 145
 146          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 147             /* unpack from PBO */
 148             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 149                                            1, format, type, INT_MAX, pixels)) {
 150                _mesa_error(ctx, GL_INVALID_OPERATION,
 151                            "glDrawPixels(invalid PBO access)");
 152                goto end;
 153             }
 154             if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
 155                /* buffer is mapped - that's an error */
 156                _mesa_error(ctx, GL_INVALID_OPERATION,
 157                            "glDrawPixels(PBO is mapped)");
 158                goto end;
 159             }
 160          }
 161
 162          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 163                                 &ctx->Unpack, pixels);
 164       }
 165    }
 166    else if (ctx->RenderMode == GL_FEEDBACK) {
 167       /* Feedback the current raster pos info */
 168       FLUSH_CURRENT( ctx, 0 );
 169       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 170       _mesa_feedback_vertex( ctx,
 171                              ctx->Current.RasterPos,
 172                              ctx->Current.RasterColor,
 173                              ctx->Current.RasterTexCoords[0] );
 174    }
 175    else {
 176       assert(ctx->RenderMode == GL_SELECT);
 177       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 178    }
 179
 180 end:
 181    _mesa_set_vp_override(ctx, GL_FALSE);
 182
 183    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 184       _mesa_flush(ctx);
 185    }
 186 }
 187
 188
 189 void GLAPIENTRY
 190 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 191                   GLenum type )
 192 {
 193    GET_CURRENT_CONTEXT(ctx);
 194
 195    FLUSH_VERTICES(ctx, 0);
 196
 197    if (MESA_VERBOSE & VERBOSE_API)
 198       _mesa_debug(ctx,
 199                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
 200                   srcx, srcy, width, height,
 201                   _mesa_enum_to_string(type),
 202                   _mesa_enum_to_string(ctx->ReadBuffer->ColorReadBuffer),
 203                   _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
 204                   IROUND(ctx->Current.RasterPos[0]),
 205                   IROUND(ctx->Current.RasterPos[1]));
 206
 207    if (width < 0 || height < 0) {
 208       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 209       return;
 210    }
 211
 212    /* Note: more detailed 'type' checking is done by the
 213     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 214     * check if the stencil buffer exists, etc.
 215     */
 216    if (type != GL_COLOR &&
 217        type != GL_DEPTH &&
 218        type != GL_STENCIL &&
 219        type != GL_DEPTH_STENCIL) {
 220       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 221                   _mesa_enum_to_string(type));
 222       return;
 223    }
 224
 225    /* We're not using the current vertex program, and the driver may install
 226     * it's own.  Note: this may dirty some state.
 227     */
 228    _mesa_set_vp_override(ctx, GL_TRUE);
 229
 230    /* Note: this call does state validation */
 231    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 232       goto end;      /* the error code was recorded */
 233    }
 234
 235    /* Check read buffer's status (draw buffer was already checked) */
 236    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 237       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 238                   "glCopyPixels(incomplete framebuffer)" );
 239       goto end;
 240    }
 241
 242    if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
 243        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 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
 302    FLUSH_VERTICES(ctx, 0);
 303
 304    if (width < 0 || height < 0) {
 305       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 306       return;
 307    }
 308
 309    if (!ctx->Current.RasterPosValid) {
 310       return;    /* do nothing */
 311    }
 312
 313    /* Note: this call does state validation */
 314    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 315       /* the error code was recorded */
 316       return;
 317    }
 318
 319    if (ctx->RasterDiscard)
 320       return;
 321
 322    if (ctx->RenderMode == GL_RENDER) {
 323       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 324       if (width > 0 && height > 0) {
 325          const GLfloat epsilon = 0.0001F;
 326          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 327          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 328
 329          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 330             /* unpack from PBO */
 331             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 332                                            1, GL_COLOR_INDEX, GL_BITMAP,
 333                                            INT_MAX, (const GLvoid *) bitmap)) {
 334                _mesa_error(ctx, GL_INVALID_OPERATION,
 335                            "glBitmap(invalid PBO access)");
 336                return;
 337             }
 338             if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
 339                /* buffer is mapped - that's an error */
 340                _mesa_error(ctx, GL_INVALID_OPERATION,
 341                            "glBitmap(PBO is mapped)");
 342                return;
 343             }
 344          }
 345
 346          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 347       }
 348    }
 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
 362    /* update raster position */
 363    ctx->Current.RasterPos[0] += xmove;
 364    ctx->Current.RasterPos[1] += ymove;
 365
 366    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 367       _mesa_flush(ctx);
 368    }
 369 }