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 "dispatch.h"
  36
  37
  38 #if FEATURE_drawpix
  39
  40
  41 /*
  42  * Execute glDrawPixels
  43  */
  44 static void GLAPIENTRY
  45 _mesa_DrawPixels( GLsizei width, GLsizei height,
  46                   GLenum format, GLenum type, const GLvoid *pixels )
  47 {
  48    GET_CURRENT_CONTEXT(ctx);
  49    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  50
  51    if (width < 0 || height < 0) {
  52       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
  53       return;
  54    }
  55
  56    /* We're not using the current vertex program, and the driver may install
  57     * its own.  Note: this may dirty some state.
  58     */
  59    _mesa_set_vp_override(ctx, GL_TRUE);
  60
  61    /* Note: this call does state validation */
  62    if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
  63       goto end;      /* the error code was recorded */
  64    }
  65
  66    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  67       goto end;      /* the error code was recorded */
  68    }
  69
  70    if (!ctx->Current.RasterPosValid) {
  71       goto end;  /* no-op, not an error */
  72    }
  73
  74    if (ctx->RenderMode == GL_RENDER) {
  75       if (width > 0 && height > 0) {
  76          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
  77          GLint x = IROUND(ctx->Current.RasterPos[0]);
  78          GLint y = IROUND(ctx->Current.RasterPos[1]);
  79
  80          if (ctx->Unpack.BufferObj->Name) {
  81             /* unpack from PBO */
  82             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
  83                                            format, type, pixels)) {
  84                _mesa_error(ctx, GL_INVALID_OPERATION,
  85                            "glDrawPixels(invalid PBO access)");
  86                goto end;
  87             }
  88             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
  89                /* buffer is mapped - that's an error */
  90                _mesa_error(ctx, GL_INVALID_OPERATION,
  91                            "glDrawPixels(PBO is mapped)");
  92                goto end;
  93             }
  94          }
  95
  96          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
  97                                 &ctx->Unpack, pixels);
  98       }
  99    }
 100    else if (ctx->RenderMode == GL_FEEDBACK) {
 101       /* Feedback the current raster pos info */
 102       FLUSH_CURRENT( ctx, 0 );
 103       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 104       _mesa_feedback_vertex( ctx,
 105                              ctx->Current.RasterPos,
 106                              ctx->Current.RasterColor,
 107                              ctx->Current.RasterTexCoords[0] );
 108    }
 109    else {
 110       ASSERT(ctx->RenderMode == GL_SELECT);
 111       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 112    }
 113
 114 end:
 115    _mesa_set_vp_override(ctx, GL_FALSE);
 116 }
 117
 118
 119 static void GLAPIENTRY
 120 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 121                   GLenum type )
 122 {
 123    GET_CURRENT_CONTEXT(ctx);
 124    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 125
 126    if (width < 0 || height < 0) {
 127       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 128       return;
 129    }
 130
 131    /* Note: more detailed 'type' checking is done by the
 132     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 133     * check if the stencil buffer exists, etc.
 134     */
 135    if (type != GL_COLOR &&
 136        type != GL_DEPTH &&
 137        type != GL_STENCIL &&
 138        type != GL_DEPTH_STENCIL) {
 139       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 140                   _mesa_lookup_enum_by_nr(type));
 141       return;
 142    }
 143
 144    /* We're not using the current vertex program, and the driver may install
 145     * it's own.  Note: this may dirty some state.
 146     */
 147    _mesa_set_vp_override(ctx, GL_TRUE);
 148
 149    /* Note: this call does state validation */
 150    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 151       goto end;      /* the error code was recorded */
 152    }
 153
 154    /* Check read buffer's status (draw buffer was already checked) */
 155    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 156       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 157                   "glCopyPixels(incomplete framebuffer)" );
 158       goto end;
 159    }
 160
 161    if (!_mesa_source_buffer_exists(ctx, type) ||
 162        !_mesa_dest_buffer_exists(ctx, type)) {
 163       _mesa_error(ctx, GL_INVALID_OPERATION,
 164                   "glCopyPixels(missing source or dest buffer)");
 165       goto end;
 166    }
 167
 168    if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
 169       goto end; /* no-op, not an error */
 170    }
 171
 172    if (ctx->RenderMode == GL_RENDER) {
 173       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 174       if (width > 0 && height > 0) {
 175          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 176          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 177          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 178                                  type );
 179       }
 180    }
 181    else if (ctx->RenderMode == GL_FEEDBACK) {
 182       FLUSH_CURRENT( ctx, 0 );
 183       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 184       _mesa_feedback_vertex( ctx,
 185                              ctx->Current.RasterPos,
 186                              ctx->Current.RasterColor,
 187                              ctx->Current.RasterTexCoords[0] );
 188    }
 189    else {
 190       ASSERT(ctx->RenderMode == GL_SELECT);
 191       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 192    }
 193
 194 end:
 195    _mesa_set_vp_override(ctx, GL_FALSE);
 196 }
 197
 198
 199 static void GLAPIENTRY
 200 _mesa_Bitmap( GLsizei width, GLsizei height,
 201               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 202               const GLubyte *bitmap )
 203 {
 204    GET_CURRENT_CONTEXT(ctx);
 205    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 206
 207    if (width < 0 || height < 0) {
 208       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 209       return;
 210    }
 211
 212    if (!ctx->Current.RasterPosValid) {
 213       return;    /* do nothing */
 214    }
 215
 216    /* Note: this call does state validation */
 217    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 218       /* the error code was recorded */
 219       return;
 220    }
 221
 222    if (ctx->RenderMode == GL_RENDER) {
 223       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 224       if (width > 0 && height > 0) {
 225          const GLfloat epsilon = 0.0001F;
 226          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 227          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 228
 229          if (ctx->Unpack.BufferObj->Name) {
 230             /* unpack from PBO */
 231             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 232                                            GL_COLOR_INDEX, GL_BITMAP,
 233                                            (GLvoid *) bitmap)) {
 234                _mesa_error(ctx, GL_INVALID_OPERATION,
 235                            "glBitmap(invalid PBO access)");
 236                return;
 237             }
 238             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 239                /* buffer is mapped - that's an error */
 240                _mesa_error(ctx, GL_INVALID_OPERATION,
 241                            "glBitmap(PBO is mapped)");
 242                return;
 243             }
 244          }
 245
 246          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 247       }
 248    }
 249 #if _HAVE_FULL_GL
 250    else if (ctx->RenderMode == GL_FEEDBACK) {
 251       FLUSH_CURRENT(ctx, 0);
 252       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 253       _mesa_feedback_vertex( ctx,
 254                              ctx->Current.RasterPos,
 255                              ctx->Current.RasterColor,
 256                              ctx->Current.RasterTexCoords[0] );
 257    }
 258    else {
 259       ASSERT(ctx->RenderMode == GL_SELECT);
 260       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 261    }
 262 #endif
 263
 264    /* update raster position */
 265    ctx->Current.RasterPos[0] += xmove;
 266    ctx->Current.RasterPos[1] += ymove;
 267 }
 268
 269
 270 void
 271 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 272 {
 273    SET_Bitmap(disp, _mesa_Bitmap);
 274    SET_CopyPixels(disp, _mesa_CopyPixels);
 275    SET_DrawPixels(disp, _mesa_DrawPixels);
 276 }
 277
 278
 279 #endif /* FEATURE_drawpix */