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