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 "pbo.h"
  35 #include "readpix.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    GET_CURRENT_CONTEXT(ctx);
  51    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  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_lookup_enum_by_nr(format),
  57                   _mesa_lookup_enum_by_nr(type),
  58                   pixels,
  59                   _mesa_lookup_enum_by_nr(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    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  80       goto end;      /* the error code was recorded */
  81    }
  82
  83    if (!ctx->Current.RasterPosValid) {
  84       goto end;  /* no-op, not an error */
  85    }
  86
  87    if (ctx->RenderMode == GL_RENDER) {
  88       if (width > 0 && height > 0) {
  89          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
  90          GLint x = IROUND(ctx->Current.RasterPos[0]);
  91          GLint y = IROUND(ctx->Current.RasterPos[1]);
  92
  93          if (ctx->Unpack.BufferObj->Name) {
  94             /* unpack from PBO */
  95             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
  96                                            format, type, pixels)) {
  97                _mesa_error(ctx, GL_INVALID_OPERATION,
  98                            "glDrawPixels(invalid PBO access)");
  99                goto end;
 100             }
 101             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 102                /* buffer is mapped - that's an error */
 103                _mesa_error(ctx, GL_INVALID_OPERATION,
 104                            "glDrawPixels(PBO is mapped)");
 105                goto end;
 106             }
 107          }
 108
 109          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 110                                 &ctx->Unpack, pixels);
 111       }
 112    }
 113    else if (ctx->RenderMode == GL_FEEDBACK) {
 114       /* Feedback the current raster pos info */
 115       FLUSH_CURRENT( ctx, 0 );
 116       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 117       _mesa_feedback_vertex( ctx,
 118                              ctx->Current.RasterPos,
 119                              ctx->Current.RasterColor,
 120                              ctx->Current.RasterTexCoords[0] );
 121    }
 122    else {
 123       ASSERT(ctx->RenderMode == GL_SELECT);
 124       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 125    }
 126
 127 end:
 128    _mesa_set_vp_override(ctx, GL_FALSE);
 129 }
 130
 131
 132 static void GLAPIENTRY
 133 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 134                   GLenum type )
 135 {
 136    GET_CURRENT_CONTEXT(ctx);
 137    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 138
 139    if (MESA_VERBOSE & VERBOSE_API)
 140       _mesa_debug(ctx,
 141                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
 142                   srcx, srcy, width, height,
 143                   _mesa_lookup_enum_by_nr(type),
 144                   _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
 145                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
 146                   IROUND(ctx->Current.RasterPos[0]),
 147                   IROUND(ctx->Current.RasterPos[1]));
 148
 149    if (width < 0 || height < 0) {
 150       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 151       return;
 152    }
 153
 154    /* Note: more detailed 'type' checking is done by the
 155     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 156     * check if the stencil buffer exists, etc.
 157     */
 158    if (type != GL_COLOR &&
 159        type != GL_DEPTH &&
 160        type != GL_STENCIL &&
 161        type != GL_DEPTH_STENCIL) {
 162       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 163                   _mesa_lookup_enum_by_nr(type));
 164       return;
 165    }
 166
 167    /* We're not using the current vertex program, and the driver may install
 168     * it's own.  Note: this may dirty some state.
 169     */
 170    _mesa_set_vp_override(ctx, GL_TRUE);
 171
 172    /* Note: this call does state validation */
 173    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 174       goto end;      /* the error code was recorded */
 175    }
 176
 177    /* Check read buffer's status (draw buffer was already checked) */
 178    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 179       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 180                   "glCopyPixels(incomplete framebuffer)" );
 181       goto end;
 182    }
 183
 184    if (!_mesa_source_buffer_exists(ctx, type) ||
 185        !_mesa_dest_buffer_exists(ctx, type)) {
 186       _mesa_error(ctx, GL_INVALID_OPERATION,
 187                   "glCopyPixels(missing source or dest buffer)");
 188       goto end;
 189    }
 190
 191    if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
 192       goto end; /* no-op, not an error */
 193    }
 194
 195    if (ctx->RenderMode == GL_RENDER) {
 196       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 197       if (width > 0 && height > 0) {
 198          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 199          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 200          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 201                                  type );
 202       }
 203    }
 204    else if (ctx->RenderMode == GL_FEEDBACK) {
 205       FLUSH_CURRENT( ctx, 0 );
 206       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 207       _mesa_feedback_vertex( ctx,
 208                              ctx->Current.RasterPos,
 209                              ctx->Current.RasterColor,
 210                              ctx->Current.RasterTexCoords[0] );
 211    }
 212    else {
 213       ASSERT(ctx->RenderMode == GL_SELECT);
 214       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 215    }
 216
 217 end:
 218    _mesa_set_vp_override(ctx, GL_FALSE);
 219 }
 220
 221
 222 static void GLAPIENTRY
 223 _mesa_Bitmap( GLsizei width, GLsizei height,
 224               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 225               const GLubyte *bitmap )
 226 {
 227    GET_CURRENT_CONTEXT(ctx);
 228    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 229
 230    if (width < 0 || height < 0) {
 231       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 232       return;
 233    }
 234
 235    if (!ctx->Current.RasterPosValid) {
 236       return;    /* do nothing */
 237    }
 238
 239    /* Note: this call does state validation */
 240    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 241       /* the error code was recorded */
 242       return;
 243    }
 244
 245    if (ctx->RenderMode == GL_RENDER) {
 246       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 247       if (width > 0 && height > 0) {
 248          const GLfloat epsilon = 0.0001F;
 249          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 250          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 251
 252          if (ctx->Unpack.BufferObj->Name) {
 253             /* unpack from PBO */
 254             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 255                                            GL_COLOR_INDEX, GL_BITMAP,
 256                                            (GLvoid *) bitmap)) {
 257                _mesa_error(ctx, GL_INVALID_OPERATION,
 258                            "glBitmap(invalid PBO access)");
 259                return;
 260             }
 261             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 262                /* buffer is mapped - that's an error */
 263                _mesa_error(ctx, GL_INVALID_OPERATION,
 264                            "glBitmap(PBO is mapped)");
 265                return;
 266             }
 267          }
 268
 269          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 270       }
 271    }
 272 #if _HAVE_FULL_GL
 273    else if (ctx->RenderMode == GL_FEEDBACK) {
 274       FLUSH_CURRENT(ctx, 0);
 275       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_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 #endif
 286
 287    /* update raster position */
 288    ctx->Current.RasterPos[0] += xmove;
 289    ctx->Current.RasterPos[1] += ymove;
 290 }
 291
 292
 293 void
 294 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 295 {
 296    SET_Bitmap(disp, _mesa_Bitmap);
 297    SET_CopyPixels(disp, _mesa_CopyPixels);
 298    SET_DrawPixels(disp, _mesa_DrawPixels);
 299 }
 300
 301
 302 #endif /* FEATURE_drawpix */