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 "draw_validate.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 "pbo.h"
  35 #include "state.h"
  36 #include "glformats.h"
  37 #include "fbobject.h"
  38 #include "util/u_math.h"
  39 #include "util/rounding.h"
  40
  41
  42 /*
  43  * Execute glDrawPixels
  44  */
  45 void GLAPIENTRY
  46 _mesa_DrawPixels( GLsizei width, GLsizei height,
  47                   GLenum format, GLenum type, const GLvoid *pixels )
  48 {
  49    GLenum err;
  50    GET_CURRENT_CONTEXT(ctx);
  51
  52    FLUSH_VERTICES(ctx, 0);
  53
  54    if (MESA_VERBOSE & VERBOSE_API)
  55       _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %ld, %ld\n",
  56                   width, height,
  57                   _mesa_enum_to_string(format),
  58                   _mesa_enum_to_string(type),
  59                   pixels,
  60                   _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
  61                   lroundf(ctx->Current.RasterPos[0]),
  62                   lroundf(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_enum_format_integer(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_enum_to_string(format),
 101                   _mesa_enum_to_string(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 dest 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 = lroundf(ctx->Current.RasterPos[0]);
 145          GLint y = lroundf(ctx->Current.RasterPos[1]);
 146
 147          if (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_check_disallowed_mapping(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    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 185       _mesa_flush(ctx);
 186    }
 187 }
 188
 189
 190 void GLAPIENTRY
 191 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 192                   GLenum type )
 193 {
 194    GET_CURRENT_CONTEXT(ctx);
 195
 196    FLUSH_VERTICES(ctx, 0);
 197
 198    if (MESA_VERBOSE & VERBOSE_API)
 199       _mesa_debug(ctx,
 200                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %ld, %ld\n",
 201                   srcx, srcy, width, height,
 202                   _mesa_enum_to_string(type),
 203                   _mesa_enum_to_string(ctx->ReadBuffer->ColorReadBuffer),
 204                   _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
 205                   lroundf(ctx->Current.RasterPos[0]),
 206                   lroundf(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_enum_to_string(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 (_mesa_is_user_fbo(ctx->ReadBuffer) &&
 244        ctx->ReadBuffer->Visual.samples > 0) {
 245       _mesa_error(ctx, GL_INVALID_OPERATION,
 246                   "glCopyPixels(multisample FBO)");
 247       goto end;
 248    }
 249
 250    if (!_mesa_source_buffer_exists(ctx, type) ||
 251        !_mesa_dest_buffer_exists(ctx, type)) {
 252       _mesa_error(ctx, GL_INVALID_OPERATION,
 253                   "glCopyPixels(missing source or dest buffer)");
 254       goto end;
 255    }
 256
 257    if (ctx->RasterDiscard) {
 258       goto end;
 259    }
 260
 261    if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
 262       goto end; /* no-op, not an error */
 263    }
 264
 265    if (ctx->RenderMode == GL_RENDER) {
 266       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 267       if (width > 0 && height > 0) {
 268          GLint destx = lroundf(ctx->Current.RasterPos[0]);
 269          GLint desty = lroundf(ctx->Current.RasterPos[1]);
 270          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 271                                  type );
 272       }
 273    }
 274    else if (ctx->RenderMode == GL_FEEDBACK) {
 275       FLUSH_CURRENT( ctx, 0 );
 276       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 277       _mesa_feedback_vertex( ctx,
 278                              ctx->Current.RasterPos,
 279                              ctx->Current.RasterColor,
 280                              ctx->Current.RasterTexCoords[0] );
 281    }
 282    else {
 283       assert(ctx->RenderMode == GL_SELECT);
 284       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 285    }
 286
 287 end:
 288    _mesa_set_vp_override(ctx, GL_FALSE);
 289
 290    if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
 291       _mesa_flush(ctx);
 292    }
 293 }
 294
 295
 296 void GLAPIENTRY
 297 _mesa_Bitmap( GLsizei width, GLsizei height,
 298               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 299               const GLubyte *bitmap )
 300 {
 301    GET_CURRENT_CONTEXT(ctx);
 302
 303    FLUSH_VERTICES(ctx, 0);
 304
 305    if (width < 0 || height < 0) {
 306       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 307       return;
 308    }
 309
 310    if (!ctx->Current.RasterPosValid) {
 311       return;    /* do nothing */
 312    }
 313
 314    /* Note: this call does state validation */
 315    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 316       /* the error code was recorded */
 317       return;
 318    }
 319
 320    if (ctx->RasterDiscard)
 321       return;
 322
 323    if (ctx->RenderMode == GL_RENDER) {
 324       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 325       if (width > 0 && height > 0) {
 326          const GLfloat epsilon = 0.0001F;
 327          GLint x = util_ifloor(ctx->Current.RasterPos[0] + epsilon - xorig);
 328          GLint y = util_ifloor(ctx->Current.RasterPos[1] + epsilon - yorig);
 329
 330          if (ctx->Unpack.BufferObj) {
 331             /* unpack from PBO */
 332             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 333                                            1, GL_COLOR_INDEX, GL_BITMAP,
 334                                            INT_MAX, (const GLvoid *) bitmap)) {
 335                _mesa_error(ctx, GL_INVALID_OPERATION,
 336                            "glBitmap(invalid PBO access)");
 337                return;
 338             }
 339             if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
 340                /* buffer is mapped - that's an error */
 341                _mesa_error(ctx, GL_INVALID_OPERATION,
 342                            "glBitmap(PBO is mapped)");
 343                return;
 344             }
 345          }
 346
 347          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 348       }
 349    }
 350    else if (ctx->RenderMode == GL_FEEDBACK) {
 351       FLUSH_CURRENT(ctx, 0);
 352       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 353       _mesa_feedback_vertex( ctx,
 354                              ctx->Current.RasterPos,
 355                              ctx->Current.RasterColor,
 356                              ctx->Current.RasterTexCoords[0] );
 357    }
 358    else {
 359       assert(ctx->RenderMode == GL_SELECT);
 360       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 361    }
 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 }