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