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 "image.h"
  34 #include "mfeatures.h"
  35 #include "pbo.h"
  36 #include "readpix.h"
  37 #include "state.h"
  38 #include "dispatch.h"
  39
  40
  41 #if FEATURE_drawpix
  42
  43
  44 /*
  45  * Execute glDrawPixels
  46  */
  47 static void GLAPIENTRY
  48 _mesa_DrawPixels( GLsizei width, GLsizei height,
  49                   GLenum format, GLenum type, const GLvoid *pixels )
  50 {
  51    GET_CURRENT_CONTEXT(ctx);
  52    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  53
  54    if (MESA_VERBOSE & VERBOSE_API)
  55       _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
  56                   width, height,
  57                   _mesa_lookup_enum_by_nr(format),
  58                   _mesa_lookup_enum_by_nr(type),
  59                   pixels,
  60                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
  61                   IROUND(ctx->Current.RasterPos[0]),
  62                   IROUND(ctx->Current.RasterPos[1]));
  63
  64
  65    if (width < 0 || height < 0) {
  66       _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
  67       return;
  68    }
  69
  70    /* We're not using the current vertex program, and the driver may install
  71     * its own.  Note: this may dirty some state.
  72     */
  73    _mesa_set_vp_override(ctx, GL_TRUE);
  74
  75    /* Note: this call does state validation */
  76    if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
  77       goto end;      /* the error code was recorded */
  78    }
  79
  80    /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
  81     * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
  82     * Rectangles) on page 151 of the GL 3.0 specification:
  83     *
  84     *     "If format contains integer components, as shown in table 3.6, an
  85     *      INVALID OPERATION error is generated."
  86     *
  87     * Since DrawPixels rendering would be merely undefined if not an error (due
  88     * to a lack of defined mapping from integer data to gl_Color fragment shader
  89     * input), NVIDIA's implementation also just returns this error despite
  90     * exposing GL_EXT_texture_integer, just return an error regardless.
  91     */
  92    if (_mesa_is_integer_format(format)) {
  93       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
  94       goto end;
  95    }
  96
  97    if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
  98       goto end;      /* the error code was recorded */
  99    }
 100
 101    if (ctx->RasterDiscard) {
 102       goto end;
 103    }
 104
 105    if (!ctx->Current.RasterPosValid) {
 106       goto end;  /* no-op, not an error */
 107    }
 108
 109    if (ctx->RenderMode == GL_RENDER) {
 110       if (width > 0 && height > 0) {
 111          /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
 112          GLint x = IROUND(ctx->Current.RasterPos[0]);
 113          GLint y = IROUND(ctx->Current.RasterPos[1]);
 114
 115          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 116             /* unpack from PBO */
 117             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 118                                            1, format, type, INT_MAX, pixels)) {
 119                _mesa_error(ctx, GL_INVALID_OPERATION,
 120                            "glDrawPixels(invalid PBO access)");
 121                goto end;
 122             }
 123             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 124                /* buffer is mapped - that's an error */
 125                _mesa_error(ctx, GL_INVALID_OPERATION,
 126                            "glDrawPixels(PBO is mapped)");
 127                goto end;
 128             }
 129          }
 130
 131          ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
 132                                 &ctx->Unpack, pixels);
 133       }
 134    }
 135    else if (ctx->RenderMode == GL_FEEDBACK) {
 136       /* Feedback the current raster pos info */
 137       FLUSH_CURRENT( ctx, 0 );
 138       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
 139       _mesa_feedback_vertex( ctx,
 140                              ctx->Current.RasterPos,
 141                              ctx->Current.RasterColor,
 142                              ctx->Current.RasterTexCoords[0] );
 143    }
 144    else {
 145       ASSERT(ctx->RenderMode == GL_SELECT);
 146       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 147    }
 148
 149 end:
 150    _mesa_set_vp_override(ctx, GL_FALSE);
 151 }
 152
 153
 154 static void GLAPIENTRY
 155 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
 156                   GLenum type )
 157 {
 158    GET_CURRENT_CONTEXT(ctx);
 159    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 160
 161    if (MESA_VERBOSE & VERBOSE_API)
 162       _mesa_debug(ctx,
 163                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
 164                   srcx, srcy, width, height,
 165                   _mesa_lookup_enum_by_nr(type),
 166                   _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
 167                   _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
 168                   IROUND(ctx->Current.RasterPos[0]),
 169                   IROUND(ctx->Current.RasterPos[1]));
 170
 171    if (width < 0 || height < 0) {
 172       _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
 173       return;
 174    }
 175
 176    /* Note: more detailed 'type' checking is done by the
 177     * _mesa_source/dest_buffer_exists() calls below.  That's where we
 178     * check if the stencil buffer exists, etc.
 179     */
 180    if (type != GL_COLOR &&
 181        type != GL_DEPTH &&
 182        type != GL_STENCIL &&
 183        type != GL_DEPTH_STENCIL) {
 184       _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
 185                   _mesa_lookup_enum_by_nr(type));
 186       return;
 187    }
 188
 189    /* We're not using the current vertex program, and the driver may install
 190     * it's own.  Note: this may dirty some state.
 191     */
 192    _mesa_set_vp_override(ctx, GL_TRUE);
 193
 194    /* Note: this call does state validation */
 195    if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
 196       goto end;      /* the error code was recorded */
 197    }
 198
 199    /* Check read buffer's status (draw buffer was already checked) */
 200    if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 201       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
 202                   "glCopyPixels(incomplete framebuffer)" );
 203       goto end;
 204    }
 205
 206    if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) {
 207       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION,
 208                   "glCopyPixels(multisample FBO)");
 209       goto end;
 210    }
 211
 212    if (!_mesa_source_buffer_exists(ctx, type) ||
 213        !_mesa_dest_buffer_exists(ctx, type)) {
 214       _mesa_error(ctx, GL_INVALID_OPERATION,
 215                   "glCopyPixels(missing source or dest buffer)");
 216       goto end;
 217    }
 218
 219    if (ctx->RasterDiscard) {
 220       goto end;
 221    }
 222
 223    if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
 224       goto end; /* no-op, not an error */
 225    }
 226
 227    if (ctx->RenderMode == GL_RENDER) {
 228       /* Round to satisfy conformance tests (matches SGI's OpenGL) */
 229       if (width > 0 && height > 0) {
 230          GLint destx = IROUND(ctx->Current.RasterPos[0]);
 231          GLint desty = IROUND(ctx->Current.RasterPos[1]);
 232          ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
 233                                  type );
 234       }
 235    }
 236    else if (ctx->RenderMode == GL_FEEDBACK) {
 237       FLUSH_CURRENT( ctx, 0 );
 238       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
 239       _mesa_feedback_vertex( ctx,
 240                              ctx->Current.RasterPos,
 241                              ctx->Current.RasterColor,
 242                              ctx->Current.RasterTexCoords[0] );
 243    }
 244    else {
 245       ASSERT(ctx->RenderMode == GL_SELECT);
 246       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 247    }
 248
 249 end:
 250    _mesa_set_vp_override(ctx, GL_FALSE);
 251 }
 252
 253
 254 static void GLAPIENTRY
 255 _mesa_Bitmap( GLsizei width, GLsizei height,
 256               GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
 257               const GLubyte *bitmap )
 258 {
 259    GET_CURRENT_CONTEXT(ctx);
 260    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 261
 262    if (width < 0 || height < 0) {
 263       _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
 264       return;
 265    }
 266
 267    if (!ctx->Current.RasterPosValid) {
 268       return;    /* do nothing */
 269    }
 270
 271    /* Note: this call does state validation */
 272    if (!_mesa_valid_to_render(ctx, "glBitmap")) {
 273       /* the error code was recorded */
 274       return;
 275    }
 276
 277    if (ctx->RasterDiscard)
 278       return;
 279
 280    if (ctx->RenderMode == GL_RENDER) {
 281       /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
 282       if (width > 0 && height > 0) {
 283          const GLfloat epsilon = 0.0001F;
 284          GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
 285          GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
 286
 287          if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
 288             /* unpack from PBO */
 289             if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
 290                                            1, GL_COLOR_INDEX, GL_BITMAP,
 291                                            INT_MAX, (const GLvoid *) bitmap)) {
 292                _mesa_error(ctx, GL_INVALID_OPERATION,
 293                            "glBitmap(invalid PBO access)");
 294                return;
 295             }
 296             if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
 297                /* buffer is mapped - that's an error */
 298                _mesa_error(ctx, GL_INVALID_OPERATION,
 299                            "glBitmap(PBO is mapped)");
 300                return;
 301             }
 302          }
 303
 304          ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
 305       }
 306    }
 307 #if _HAVE_FULL_GL
 308    else if (ctx->RenderMode == GL_FEEDBACK) {
 309       FLUSH_CURRENT(ctx, 0);
 310       _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
 311       _mesa_feedback_vertex( ctx,
 312                              ctx->Current.RasterPos,
 313                              ctx->Current.RasterColor,
 314                              ctx->Current.RasterTexCoords[0] );
 315    }
 316    else {
 317       ASSERT(ctx->RenderMode == GL_SELECT);
 318       /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
 319    }
 320 #endif
 321
 322    /* update raster position */
 323    ctx->Current.RasterPos[0] += xmove;
 324    ctx->Current.RasterPos[1] += ymove;
 325 }
 326
 327
 328 void
 329 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
 330 {
 331    SET_Bitmap(disp, _mesa_Bitmap);
 332    SET_CopyPixels(disp, _mesa_CopyPixels);
 333    SET_DrawPixels(disp, _mesa_DrawPixels);
 334 }
 335
 336
 337 #endif /* FEATURE_drawpix */