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