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 (width < 0 || height < 0) {
  53       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
  54       return;
  55    }
  56
  57    /* We're not using the current vertex program, and the driver may install
  58     * its own.  Note: this may dirty some state.
  59     */
  60    _mesa_set_vp_override(ctx, GL_TRUE);
  61
  62    /* Note: this call does state validation */
  63    if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
  64       goto end;      /* the error code was recorded */
  65    }
  66
  67    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  68       goto end;      /* the error code was recorded */
  69    }
  70
  71    if (!ctx->Current.RasterPosValid) {
  72       goto end;  /* no-op, not an error */
  73    }
  74
  75    if (ctx->RenderMode == GL_RENDER) {
  76       if (width > 0 && height > 0) {
  77          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
  78          GLint x = IROUND(ctx->Current.RasterPos[0]);
  79          GLint y = IROUND(ctx->Current.RasterPos[1]);
  80
  81          if (ctx->Unpack.BufferObj->Name) {
  82             /* unpack from PBO */
  83             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
  84                                            format, type, pixels)) {
  85                _mesa_error(ctx, GL_INVALID_OPERATION,
  86                            "glDrawPixels(invalid PBO access)");
  87                goto end;
  88             }
  89             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
  90                /* buffer is mapped - that's an error */
  91                _mesa_error(ctx, GL_INVALID_OPERATION,
  92                            "glDrawPixels(PBO is mapped)");
  93                goto end;
  94             }
  95          }
  96
  97          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
  98                                 &ctx->Unpack, pixels);
  99       }
 100    }
 101    else if (ctx->RenderMode == GL_FEEDBACK) {
 102       /* Feedback the current raster pos info */
 103       FLUSH_CURRENT( ctx, 0 );
 104       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 105       _mesa_feedback_vertex( ctx,
 106                              ctx->Current.RasterPos,
 107                              ctx->Current.RasterColor,
 108                              ctx->Current.RasterTexCoords[0] );
 109    }
 110    else {
 111       ASSERT(ctx->RenderMode == GL_SELECT);
 112       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 113    }
 114
 115 end:
 116    _mesa_set_vp_override(ctx, GL_FALSE);
 117 }
 118
 119
 120 static void GLAPIENTRY
 121 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 122                   GLenum type )
 123 {
 124    GET_CURRENT_CONTEXT(ctx);
 125    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 126
 127    if (width < 0 || height < 0) {
 128       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 129       return;
 130    }
 131
 132    /* Note: more detailed 'type' checking is done by the
 133     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 134     * check if the stencil buffer exists, etc.
 135     */
 136    if (type != GL_COLOR &&
 137        type != GL_DEPTH &&
 138        type != GL_STENCIL &&
 139        type != GL_DEPTH_STENCIL) {
 140       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 141                   _mesa_lookup_enum_by_nr(type));
 142       return;
 143    }
 144
 145    /* We're not using the current vertex program, and the driver may install
 146     * it's own.  Note: this may dirty some state.
 147     */
 148    _mesa_set_vp_override(ctx, GL_TRUE);
 149
 150    /* Note: this call does state validation */
 151    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 152       goto end;      /* the error code was recorded */
 153    }
 154
 155    /* Check read buffer's status (draw buffer was already checked) */
 156    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 157       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 158                   "glCopyPixels(incomplete framebuffer)" );
 159       goto end;
 160    }
 161
 162    if (!_mesa_source_buffer_exists(ctx, type) ||
 163        !_mesa_dest_buffer_exists(ctx, type)) {
 164       _mesa_error(ctx, GL_INVALID_OPERATION,
 165                   "glCopyPixels(missing source or dest buffer)");
 166       goto end;
 167    }
 168
 169    if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
 170       goto end; /* no-op, not an error */
 171    }
 172
 173    if (ctx->RenderMode == GL_RENDER) {
 174       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 175       if (width > 0 && height > 0) {
 176          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 177          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 178          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 179                                  type );
 180       }
 181    }
 182    else if (ctx->RenderMode == GL_FEEDBACK) {
 183       FLUSH_CURRENT( ctx, 0 );
 184       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 185       _mesa_feedback_vertex( ctx,
 186                              ctx->Current.RasterPos,
 187                              ctx->Current.RasterColor,
 188                              ctx->Current.RasterTexCoords[0] );
 189    }
 190    else {
 191       ASSERT(ctx->RenderMode == GL_SELECT);
 192       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 193    }
 194
 195 end:
 196    _mesa_set_vp_override(ctx, GL_FALSE);
 197 }
 198
 199
 200 static void GLAPIENTRY
 201 _mesa_Bitmap( GLsizei width, GLsizei height,
 202               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 203               const GLubyte *bitmap )
 204 {
 205    GET_CURRENT_CONTEXT(ctx);
 206    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 207
 208    if (width < 0 || height < 0) {
 209       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 210       return;
 211    }
 212
 213    if (!ctx->Current.RasterPosValid) {
 214       return;    /* do nothing */
 215    }
 216
 217    /* Note: this call does state validation */
 218    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 219       /* the error code was recorded */
 220       return;
 221    }
 222
 223    if (ctx->RenderMode == GL_RENDER) {
 224       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 225       if (width > 0 && height > 0) {
 226          const GLfloat epsilon = 0.0001F;
 227          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 228          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 229
 230          if (ctx->Unpack.BufferObj->Name) {
 231             /* unpack from PBO */
 232             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 233                                            GL_COLOR_INDEX, GL_BITMAP,
 234                                            (GLvoid *) bitmap)) {
 235                _mesa_error(ctx, GL_INVALID_OPERATION,
 236                            "glBitmap(invalid PBO access)");
 237                return;
 238             }
 239             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 240                /* buffer is mapped - that's an error */
 241                _mesa_error(ctx, GL_INVALID_OPERATION,
 242                            "glBitmap(PBO is mapped)");
 243                return;
 244             }
 245          }
 246
 247          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 248       }
 249    }
 250 #if _HAVE_FULL_GL
 251    else if (ctx->RenderMode == GL_FEEDBACK) {
 252       FLUSH_CURRENT(ctx, 0);
 253       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 254       _mesa_feedback_vertex( ctx,
 255                              ctx->Current.RasterPos,
 256                              ctx->Current.RasterColor,
 257                              ctx->Current.RasterTexCoords[0] );
 258    }
 259    else {
 260       ASSERT(ctx->RenderMode == GL_SELECT);
 261       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 262    }
 263 #endif
 264
 265    /* update raster position */
 266    ctx->Current.RasterPos[0] += xmove;
 267    ctx->Current.RasterPos[1] += ymove;
 268 }
 269
 270
 271 void
 272 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 273 {
 274    SET_Bitmap(disp, _mesa_Bitmap);
 275    SET_CopyPixels(disp, _mesa_CopyPixels);
 276    SET_DrawPixels(disp, _mesa_DrawPixels);
 277 }
 278
 279
 280 #endif /* FEATURE_drawpix */