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 "readpix.h"
  34 #include "state.h"
  35 #include "glapi/dispatch.h"
  36
  37
  38 #if FEATURE_drawpix
  39
  40
  41 /**
  42  * If a fragment program is enabled, check that it's valid.
  43  * \return GL_TRUE if valid, GL_FALSE otherwise
  44  */
  45 static GLboolean
  46 valid_fragment_program(GLcontext *ctx)
  47 {
  48    return !(ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled);
  49 }
  50
  51
  52 /*
  53  * Execute glDrawPixels
  54  */
  55 static void GLAPIENTRY
  56 _mesa_DrawPixels( GLsizei width, GLsizei height,
  57                   GLenum format, GLenum type, const GLvoid *pixels )
  58 {
  59    GET_CURRENT_CONTEXT(ctx);
  60    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  61
  62    if (width < 0 || height < 0) {
  63       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
  64       return;
  65    }
  66
  67    /* We're not using the current vertex program, and the driver may install
  68     * it's own.
  69     */
  70    _mesa_set_vp_override(ctx, GL_TRUE);
  71
  72    if (ctx->NewState) {
  73       _mesa_update_state(ctx);
  74    }
  75
  76    if (!valid_fragment_program(ctx)) {
  77       _mesa_error(ctx, GL_INVALID_OPERATION,
  78                   "glDrawPixels (invalid fragment program)");
  79       goto end;
  80    }
  81
  82    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  83       /* the error was already recorded */
  84       goto end;
  85    }
  86
  87    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  88       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
  89                   "glDrawPixels(incomplete framebuffer)" );
  90       goto end;
  91    }
  92
  93    if (!ctx->Current.RasterPosValid) {
  94       goto end; /* no-op, not an error */
  95    }
  96
  97    if (ctx->RenderMode == GL_RENDER) {
  98       if (width > 0 && height > 0) {
  99          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 100          GLint x = IROUND(ctx->Current.RasterPos[0]);
 101          GLint y = IROUND(ctx->Current.RasterPos[1]);
 102
 103          if (ctx->Unpack.BufferObj->Name) {
 104             /* unpack from PBO */
 105             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 106                                            format, type, pixels)) {
 107                _mesa_error(ctx, GL_INVALID_OPERATION,
 108                            "glDrawPixels(invalid PBO access)");
 109                goto end;
 110             }
 111             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 112                /* buffer is mapped - that's an error */
 113                _mesa_error(ctx, GL_INVALID_OPERATION,
 114                            "glDrawPixels(PBO is mapped)");
 115                goto end;
 116             }
 117          }
 118
 119          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 120                                 &ctx->Unpack, pixels);
 121       }
 122    }
 123    else if (ctx->RenderMode == GL_FEEDBACK) {
 124       /* Feedback the current raster pos info */
 125       FLUSH_CURRENT( ctx, 0 );
 126       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 127       _mesa_feedback_vertex( ctx,
 128                              ctx->Current.RasterPos,
 129                              ctx->Current.RasterColor,
 130                              ctx->Current.RasterIndex,
 131                              ctx->Current.RasterTexCoords[0] );
 132    }
 133    else {
 134       ASSERT(ctx->RenderMode == GL_SELECT);
 135       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 136    }
 137
 138 end:
 139    _mesa_set_vp_override(ctx, GL_FALSE);
 140 }
 141
 142
 143 static void GLAPIENTRY
 144 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 145                   GLenum type )
 146 {
 147    GET_CURRENT_CONTEXT(ctx);
 148    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 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.
 170     */
 171    _mesa_set_vp_override(ctx, GL_TRUE);
 172
 173    if (ctx->NewState) {
 174       _mesa_update_state(ctx);
 175    }
 176
 177    if (!valid_fragment_program(ctx)) {
 178       _mesa_error(ctx, GL_INVALID_OPERATION,
 179                   "glCopyPixels (invalid fragment program)");
 180       goto end;
 181    }
 182
 183    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
 184        ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 185       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 186                   "glCopyPixels(incomplete framebuffer)" );
 187       goto end;
 188    }
 189
 190    if (!_mesa_source_buffer_exists(ctx, type) ||
 191        !_mesa_dest_buffer_exists(ctx, type)) {
 192       _mesa_error(ctx, GL_INVALID_OPERATION,
 193                   "glCopyPixels(missing source or dest buffer)");
 194       goto end;
 195    }
 196
 197    if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
 198       goto end; /* no-op, not an error */
 199    }
 200
 201    if (ctx->RenderMode == GL_RENDER) {
 202       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 203       if (width > 0 && height > 0) {
 204          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 205          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 206          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 207                                  type );
 208       }
 209    }
 210    else if (ctx->RenderMode == GL_FEEDBACK) {
 211       FLUSH_CURRENT( ctx, 0 );
 212       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 213       _mesa_feedback_vertex( ctx,
 214                              ctx->Current.RasterPos,
 215                              ctx->Current.RasterColor,
 216                              ctx->Current.RasterIndex,
 217                              ctx->Current.RasterTexCoords[0] );
 218    }
 219    else {
 220       ASSERT(ctx->RenderMode == GL_SELECT);
 221       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 222    }
 223
 224 end:
 225    _mesa_set_vp_override(ctx, GL_FALSE);
 226 }
 227
 228
 229 static void GLAPIENTRY
 230 _mesa_Bitmap( GLsizei width, GLsizei height,
 231               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 232               const GLubyte *bitmap )
 233 {
 234    GET_CURRENT_CONTEXT(ctx);
 235    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 236
 237    if (width < 0 || height < 0) {
 238       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 239       return;
 240    }
 241
 242    if (!ctx->Current.RasterPosValid) {
 243       return;    /* do nothing */
 244    }
 245
 246    if (ctx->NewState) {
 247       _mesa_update_state(ctx);
 248    }
 249
 250    if (!valid_fragment_program(ctx)) {
 251       _mesa_error(ctx, GL_INVALID_OPERATION,
 252                   "glBitmap (invalid fragment program)");
 253       return;
 254    }
 255
 256    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 257       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 258                   "glBitmap(incomplete framebuffer)");
 259       return;
 260    }
 261
 262    if (ctx->RenderMode == GL_RENDER) {
 263       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 264       if (width > 0 && height > 0) {
 265          const GLfloat epsilon = 0.0001F;
 266          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 267          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 268
 269          if (ctx->Unpack.BufferObj->Name) {
 270             /* unpack from PBO */
 271             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 272                                            GL_COLOR_INDEX, GL_BITMAP,
 273                                            (GLvoid *) bitmap)) {
 274                _mesa_error(ctx, GL_INVALID_OPERATION,
 275                            "glBitmap(invalid PBO access)");
 276                return;
 277             }
 278             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 279                /* buffer is mapped - that's an error */
 280                _mesa_error(ctx, GL_INVALID_OPERATION,
 281                            "glBitmap(PBO is mapped)");
 282                return;
 283             }
 284          }
 285
 286          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 287       }
 288    }
 289 #if _HAVE_FULL_GL
 290    else if (ctx->RenderMode == GL_FEEDBACK) {
 291       FLUSH_CURRENT(ctx, 0);
 292       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 293       _mesa_feedback_vertex( ctx,
 294                              ctx->Current.RasterPos,
 295                              ctx->Current.RasterColor,
 296                              ctx->Current.RasterIndex,
 297                              ctx->Current.RasterTexCoords[0] );
 298    }
 299    else {
 300       ASSERT(ctx->RenderMode == GL_SELECT);
 301       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 302    }
 303 #endif
 304
 305    /* update raster position */
 306    ctx->Current.RasterPos[0] += xmove;
 307    ctx->Current.RasterPos[1] += ymove;
 308 }
 309
 310
 311 void
 312 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 313 {
 314    SET_Bitmap(disp, _mesa_Bitmap);
 315    SET_CopyPixels(disp, _mesa_CopyPixels);
 316    SET_DrawPixels(disp, _mesa_DrawPixels);
 317 }
 318
 319
 320 #endif /* FEATURE_drawpix */