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 "feedback.h"
  31 #include "framebuffer.h"
  32 #include "image.h"
  33 #include "readpix.h"
  34 #include "state.h"
  35
  36
  37 #if _HAVE_FULL_GL
  38
  39 /*
  40  * Execute glDrawPixels
  41  */
  42 void GLAPIENTRY
  43 _mesa_DrawPixels( GLsizei width, GLsizei height,
  44                   GLenum format, GLenum type, const GLvoid *pixels )
  45 {
  46    GET_CURRENT_CONTEXT(ctx);
  47    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  48
  49    if (width < 0 || height < 0) {
  50       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
  51       return;
  52    }
  53
  54    if (ctx->NewState) {
  55       _mesa_update_state(ctx);
  56    }
  57
  58    if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
  59       _mesa_error(ctx, GL_INVALID_OPERATION,
  60                   "glDrawPixels (invalid fragment program)");
  61       return;
  62    }
  63
  64    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  65       /* found an error */
  66       return;
  67    }
  68
  69    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  70       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
  71                   "glDrawPixels(incomplete framebuffer)" );
  72       return;
  73    }
  74
  75    if (!ctx->Current.RasterPosValid) {
  76       return;
  77    }
  78
  79    if (ctx->RenderMode == GL_RENDER) {
  80       /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
  81       GLint x = IROUND(ctx->Current.RasterPos[0]);
  82       GLint y = IROUND(ctx->Current.RasterPos[1]);
  83
  84       if (ctx->Unpack.BufferObj->Name) {
  85          /* unpack from PBO */
  86          if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
  87                                         format, type, pixels)) {
  88             _mesa_error(ctx, GL_INVALID_OPERATION,
  89                         "glDrawPixels(invalid PBO access)");
  90             return;
  91          }
  92          if (ctx->Unpack.BufferObj->Pointer) {
  93             /* buffer is mapped - that's an error */
  94             _mesa_error(ctx, GL_INVALID_OPERATION,
  95                         "glDrawPixels(PBO is mapped)");
  96             return;
  97          }
  98       }
  99
 100       ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 101                              &ctx->Unpack, pixels);
 102    }
 103    else if (ctx->RenderMode == GL_FEEDBACK) {
 104       /* Feedback the current raster pos info */
 105       FLUSH_CURRENT( ctx, 0 );
 106       FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 107       _mesa_feedback_vertex( ctx,
 108                              ctx->Current.RasterPos,
 109                              ctx->Current.RasterColor,
 110                              ctx->Current.RasterIndex,
 111                              ctx->Current.RasterTexCoords[0] );
 112    }
 113    else {
 114       ASSERT(ctx->RenderMode == GL_SELECT);
 115       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 116    }
 117 }
 118
 119
 120 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 (ctx->NewState) {
 128       _mesa_update_state(ctx);
 129    }
 130
 131    if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
 132       _mesa_error(ctx, GL_INVALID_OPERATION,
 133                   "glCopyPixels (invalid fragment program)");
 134       return;
 135    }
 136
 137    if (width < 0 || height < 0) {
 138       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 139       return;
 140    }
 141
 142    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
 143        ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 144       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 145                   "glCopyPixels(incomplete framebuffer)" );
 146       return;
 147    }
 148
 149    if (!_mesa_source_buffer_exists(ctx, type) ||
 150        !_mesa_dest_buffer_exists(ctx, type)) {
 151       _mesa_error(ctx, GL_INVALID_OPERATION,
 152                   "glCopyPixels(missing source or dest buffer)");
 153       return;
 154    }
 155
 156    if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
 157       return;
 158    }
 159
 160    if (ctx->RenderMode == GL_RENDER) {
 161       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 162       GLint destx = IROUND(ctx->Current.RasterPos[0]);
 163       GLint desty = IROUND(ctx->Current.RasterPos[1]);
 164       ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 165                               type );
 166    }
 167    else if (ctx->RenderMode == GL_FEEDBACK) {
 168       FLUSH_CURRENT( ctx, 0 );
 169       FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 170       _mesa_feedback_vertex( ctx,
 171                              ctx->Current.RasterPos,
 172                              ctx->Current.RasterColor,
 173                              ctx->Current.RasterIndex,
 174                              ctx->Current.RasterTexCoords[0] );
 175    }
 176    else {
 177       ASSERT(ctx->RenderMode == GL_SELECT);
 178       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 179    }
 180 }
 181
 182 #endif /* _HAVE_FULL_GL */
 183
 184
 185
 186 void GLAPIENTRY
 187 _mesa_Bitmap( GLsizei width, GLsizei height,
 188               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 189               const GLubyte *bitmap )
 190 {
 191    GET_CURRENT_CONTEXT(ctx);
 192    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 193
 194    if (width < 0 || height < 0) {
 195       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 196       return;
 197    }
 198
 199    if (!ctx->Current.RasterPosValid) {
 200       return;    /* do nothing */
 201    }
 202
 203    if (ctx->NewState) {
 204       _mesa_update_state(ctx);
 205    }
 206
 207    if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
 208       _mesa_error(ctx, GL_INVALID_OPERATION,
 209                   "glBitmap (invalid fragment program)");
 210       return;
 211    }
 212
 213    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 214       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 215                   "glBitmap(incomplete framebuffer)");
 216       return;
 217    }
 218
 219    if (ctx->RenderMode == GL_RENDER) {
 220       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 221       const GLfloat epsilon = 0.0001F;
 222       GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 223       GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 224
 225       if (ctx->Unpack.BufferObj->Name) {
 226          /* unpack from PBO */
 227          if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
 228                                         GL_COLOR_INDEX, GL_BITMAP,
 229                                         (GLvoid *) bitmap)) {
 230             _mesa_error(ctx, GL_INVALID_OPERATION,
 231                         "glBitmap(invalid PBO access)");
 232             return;
 233          }
 234          if (ctx->Unpack.BufferObj->Pointer) {
 235             /* buffer is mapped - that's an error */
 236             _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
 237             return;
 238          }
 239       }
 240
 241       ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 242    }
 243 #if _HAVE_FULL_GL
 244    else if (ctx->RenderMode == GL_FEEDBACK) {
 245       FLUSH_CURRENT(ctx, 0);
 246       FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 247       _mesa_feedback_vertex( ctx,
 248                              ctx->Current.RasterPos,
 249                              ctx->Current.RasterColor,
 250                              ctx->Current.RasterIndex,
 251                              ctx->Current.RasterTexCoords[0] );
 252    }
 253    else {
 254       ASSERT(ctx->RenderMode == GL_SELECT);
 255       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 256    }
 257 #endif
 258
 259    /* update raster position */
 260    ctx->Current.RasterPos[0] += xmove;
 261    ctx->Current.RasterPos[1] += ymove;
 262 }
 263
 264
 265
 266 #if 0  /* experimental */
 267 /*
 268  * Execute glDrawDepthPixelsMESA().  This function accepts both a color
 269  * image and depth (Z) image.  Rasterization produces fragments with
 270  * color and Z taken from these images.  This function is intended for
 271  * Z-compositing.  Normally, this operation requires two glDrawPixels
 272  * calls with stencil testing.
 273  */
 274 void GLAPIENTRY
 275 _mesa_DrawDepthPixelsMESA( GLsizei width, GLsizei height,
 276                            GLenum colorFormat, GLenum colorType,
 277                            const GLvoid *colors,
 278                            GLenum depthType, const GLvoid *depths )
 279 {
 280    GET_CURRENT_CONTEXT(ctx);
 281    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 282
 283    if (width < 0 || height < 0) {
 284       _mesa_error( ctx, GL_INVALID_VALUE,
 285                    "glDrawDepthPixelsMESA(width or height < 0" );
 286       return;
 287    }
 288
 289    if (!ctx->Current.RasterPosValid) {
 290       return;
 291    }
 292
 293    if (ctx->NewState) {
 294       _mesa_update_state(ctx);
 295    }
 296
 297    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 298       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 299                   "glDrawDepthPixelsMESA(incomplete framebuffer)");
 300       return;
 301    }
 302
 303    if (ctx->RenderMode == GL_RENDER) {
 304       /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 305       GLint x = IROUND(ctx->Current.RasterPos[0]);
 306       GLint y = IROUND(ctx->Current.RasterPos[1]);
 307       ctx->Driver.DrawDepthPixelsMESA(ctx, x, y, width, height,
 308                                       colorFormat, colorType, colors,
 309                                       depthType, depths, &ctx->Unpack);
 310    }
 311    else if (ctx->RenderMode == GL_FEEDBACK) {
 312       /* Feedback the current raster pos info */
 313       FLUSH_CURRENT( ctx, 0 );
 314       FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 315       _mesa_feedback_vertex( ctx,
 316                              ctx->Current.RasterPos,
 317                              ctx->Current.RasterColor,
 318                              ctx->Current.RasterIndex,
 319                              ctx->Current.RasterTexCoords[0] );
 320    }
 321    else {
 322       ASSERT(ctx->RenderMode == GL_SELECT);
 323       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 324    }
 325 }
 326
 327 #endif