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->TransformFeedback.RasterDiscard) {
  84       goto end;
  85    }
  86
  87    if (!ctx->Current.RasterPosValid) {
  88       goto end;  /* no-op, not an error */
  89    }
  90
  91    if (ctx->RenderMode == GL_RENDER) {
  92       if (width > 0 && height > 0) {
  93          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
  94          GLint x = IROUND(ctx->Current.RasterPos[0]);
  95          GLint y = IROUND(ctx->Current.RasterPos[1]);
  96
  97          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
  98             /* unpack from PBO */
  99             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 100                                            1, format, type, INT_MAX, pixels)) {
 101                _mesa_error(ctx, GL_INVALID_OPERATION,
 102                            "glDrawPixels(invalid PBO access)");
 103                goto end;
 104             }
 105             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 106                /* buffer is mapped - that's an error */
 107                _mesa_error(ctx, GL_INVALID_OPERATION,
 108                            "glDrawPixels(PBO is mapped)");
 109                goto end;
 110             }
 111          }
 112
 113          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 114                                 &ctx->Unpack, pixels);
 115       }
 116    }
 117    else if (ctx->RenderMode == GL_FEEDBACK) {
 118       /* Feedback the current raster pos info */
 119       FLUSH_CURRENT( ctx, 0 );
 120       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 121       _mesa_feedback_vertex( ctx,
 122                              ctx->Current.RasterPos,
 123                              ctx->Current.RasterColor,
 124                              ctx->Current.RasterTexCoords[0] );
 125    }
 126    else {
 127       ASSERT(ctx->RenderMode == GL_SELECT);
 128       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 129    }
 130
 131 end:
 132    _mesa_set_vp_override(ctx, GL_FALSE);
 133 }
 134
 135
 136 static void GLAPIENTRY
 137 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 138                   GLenum type )
 139 {
 140    GET_CURRENT_CONTEXT(ctx);
 141    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 142
 143    if (MESA_VERBOSE & VERBOSE_API)
 144       _mesa_debug(ctx,
 145                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
 146                   srcx, srcy, width, height,
 147                   _mesa_lookup_enum_by_nr(type),
 148                   _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
 149                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
 150                   IROUND(ctx->Current.RasterPos[0]),
 151                   IROUND(ctx->Current.RasterPos[1]));
 152
 153    if (width < 0 || height < 0) {
 154       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 155       return;
 156    }
 157
 158    /* Note: more detailed 'type' checking is done by the
 159     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 160     * check if the stencil buffer exists, etc.
 161     */
 162    if (type != GL_COLOR &&
 163        type != GL_DEPTH &&
 164        type != GL_STENCIL &&
 165        type != GL_DEPTH_STENCIL) {
 166       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 167                   _mesa_lookup_enum_by_nr(type));
 168       return;
 169    }
 170
 171    /* We're not using the current vertex program, and the driver may install
 172     * it's own.  Note: this may dirty some state.
 173     */
 174    _mesa_set_vp_override(ctx, GL_TRUE);
 175
 176    /* Note: this call does state validation */
 177    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 178       goto end;      /* the error code was recorded */
 179    }
 180
 181    /* Check read buffer's status (draw buffer was already checked) */
 182    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 183       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 184                   "glCopyPixels(incomplete framebuffer)" );
 185       goto end;
 186    }
 187
 188    if (!_mesa_source_buffer_exists(ctx, type) ||
 189        !_mesa_dest_buffer_exists(ctx, type)) {
 190       _mesa_error(ctx, GL_INVALID_OPERATION,
 191                   "glCopyPixels(missing source or dest buffer)");
 192       goto end;
 193    }
 194
 195    if (ctx->TransformFeedback.RasterDiscard) {
 196       goto end;
 197    }
 198
 199    if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
 200       goto end; /* no-op, not an error */
 201    }
 202
 203    if (ctx->RenderMode == GL_RENDER) {
 204       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 205       if (width > 0 && height > 0) {
 206          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 207          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 208          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 209                                  type );
 210       }
 211    }
 212    else if (ctx->RenderMode == GL_FEEDBACK) {
 213       FLUSH_CURRENT( ctx, 0 );
 214       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 215       _mesa_feedback_vertex( ctx,
 216                              ctx->Current.RasterPos,
 217                              ctx->Current.RasterColor,
 218                              ctx->Current.RasterTexCoords[0] );
 219    }
 220    else {
 221       ASSERT(ctx->RenderMode == GL_SELECT);
 222       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 223    }
 224
 225 end:
 226    _mesa_set_vp_override(ctx, GL_FALSE);
 227 }
 228
 229
 230 static void GLAPIENTRY
 231 _mesa_Bitmap( GLsizei width, GLsizei height,
 232               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 233               const GLubyte *bitmap )
 234 {
 235    GET_CURRENT_CONTEXT(ctx);
 236    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 237
 238    if (width < 0 || height < 0) {
 239       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 240       return;
 241    }
 242
 243    if (!ctx->Current.RasterPosValid) {
 244       return;    /* do nothing */
 245    }
 246
 247    /* Note: this call does state validation */
 248    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 249       /* the error code was recorded */
 250       return;
 251    }
 252
 253    if (ctx->TransformFeedback.RasterDiscard)
 254       return;
 255
 256    if (ctx->RenderMode == GL_RENDER) {
 257       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 258       if (width > 0 && height > 0) {
 259          const GLfloat epsilon = 0.0001F;
 260          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 261          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 262
 263          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 264             /* unpack from PBO */
 265             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 266                                            1, GL_COLOR_INDEX, GL_BITMAP,
 267                                            INT_MAX, (const GLvoid *) bitmap)) {
 268                _mesa_error(ctx, GL_INVALID_OPERATION,
 269                            "glBitmap(invalid PBO access)");
 270                return;
 271             }
 272             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 273                /* buffer is mapped - that's an error */
 274                _mesa_error(ctx, GL_INVALID_OPERATION,
 275                            "glBitmap(PBO is mapped)");
 276                return;
 277             }
 278          }
 279
 280          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 281       }
 282    }
 283 #if _HAVE_FULL_GL
 284    else if (ctx->RenderMode == GL_FEEDBACK) {
 285       FLUSH_CURRENT(ctx, 0);
 286       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 287       _mesa_feedback_vertex( ctx,
 288                              ctx->Current.RasterPos,
 289                              ctx->Current.RasterColor,
 290                              ctx->Current.RasterTexCoords[0] );
 291    }
 292    else {
 293       ASSERT(ctx->RenderMode == GL_SELECT);
 294       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 295    }
 296 #endif
 297
 298    /* update raster position */
 299    ctx->Current.RasterPos[0] += xmove;
 300    ctx->Current.RasterPos[1] += ymove;
 301 }
 302
 303
 304 void
 305 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 306 {
 307    SET_Bitmap(disp, _mesa_Bitmap);
 308    SET_CopyPixels(disp, _mesa_CopyPixels);
 309    SET_DrawPixels(disp, _mesa_DrawPixels);
 310 }
 311
 312
 313 #endif /* FEATURE_drawpix */