C++ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH函数代码示例

void
_mesa_AlphaFunc( GLenum func, GLclampf ref )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glAlphaFunc");

   switch (func) {
      case GL_NEVER:
      case GL_LESS:
      case GL_EQUAL:
      case GL_LEQUAL:
      case GL_GREATER:
      case GL_NOTEQUAL:
      case GL_GEQUAL:
      case GL_ALWAYS:
         ctx->Color.AlphaFunc = func;
         if (ref <= 0.0)
            ctx->Color.AlphaRef = (GLubyte) 0;
         else if (ref >= 1.0)
            ctx->Color.AlphaRef = (GLubyte) 255;
         else
            CLAMPED_FLOAT_COLOR_TO_UBYTE_COLOR(ctx->Color.AlphaRef, ref);
         if (ctx->Driver.AlphaFunc) {
            (*ctx->Driver.AlphaFunc)(ctx, func, ctx->Color.AlphaRef);
         }
         break;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glAlphaFunc(func)" );
         break;
   }
}

void
_mesa_CopyConvolutionFilter2D(GLenum target, GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height)
{
   GLint baseFormat;
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (target != GL_CONVOLUTION_2D) {
      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter2D(target)");
      return;
   }

   baseFormat = base_filter_format(internalFormat);
   if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter2D(internalFormat)");
      return;
   }

   if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter2D(width)");
      return;
   }
   if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter2D(height)");
      return;
   }

   ctx->Driver.CopyConvolutionFilter2D( ctx, target, internalFormat, x, y, 
					width, height );

}

/**
 * Apply an orthographic projection matrix.
 *
 * \param left left clipping plane coordinate.
 * \param right right clipping plane coordinate.
 * \param bottom bottom clipping plane coordinate.
 * \param top top clipping plane coordinate.
 * \param nearval distance to the near clipping plane.
 * \param farval distance to the far clipping plane.
 *
 * \sa glOrtho().
 *
 * Flushes vertices and validates parameters. Calls _math_matrix_ortho() with
 * the top matrix of the current matrix stack and sets
 * __GLcontextRec::NewState.
 */
void GLAPIENTRY
_mesa_Ortho( GLdouble left, GLdouble right,
             GLdouble bottom, GLdouble top,
             GLdouble nearval, GLdouble farval )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (MESA_VERBOSE & VERBOSE_API)
      _mesa_debug(ctx, "glOrtho(%f, %f, %f, %f, %f, %f)\n",
                  left, right, bottom, top, nearval, farval);

   if (left == right ||
       bottom == top ||
       nearval == farval)
   {
      _mesa_error( ctx,  GL_INVALID_VALUE, "glOrtho" );
      return;
   }

   _math_matrix_ortho( ctx->CurrentStack->Top,
                       (GLfloat) left, (GLfloat) right, 
		       (GLfloat) bottom, (GLfloat) top, 
		       (GLfloat) nearval, (GLfloat) farval );
   ctx->NewState |= ctx->CurrentStack->DirtyFlag;
}

/**
 * Set texture priorities.
 * 
 * \param n number of textures.
 * \param texName texture names.
 * \param priorities corresponding texture priorities.
 * 
 * \sa glPrioritizeTextures().
 * 
 * Looks up each texture in the hash, clamps the corresponding priority between
 * 0.0 and 1.0, and calls dd_function_table::PrioritizeTexture.
 */
void GLAPIENTRY
_mesa_PrioritizeTextures( GLsizei n, const GLuint *texName,
                          const GLclampf *priorities )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (n < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glPrioritizeTextures" );
      return;
   }

   if (!priorities)
      return;

   for (i = 0; i < n; i++) {
      if (texName[i] > 0) {
         struct gl_texture_object *t = _mesa_lookup_texture(ctx, texName[i]);
         if (t) {
            t->Priority = CLAMP( priorities[i], 0.0F, 1.0F );
         }
      }
   }

   ctx->NewState |= _NEW_TEXTURE;
}

void GLAPIENTRY
_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
{
   struct gl_texture_object *texObj;
   struct gl_texture_image *texImage;
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (getcompressedteximage_error_check(ctx, target, level, img)) {
      return;
   }

   if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) {
      /* not an error, do nothing */
      return;
   }

   texObj = _mesa_get_current_tex_object(ctx, target);
   texImage = _mesa_select_tex_image(ctx, texObj, target, level);

   if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
      _mesa_debug(ctx,
                  "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
                  texObj->Name,
                  _mesa_get_format_name(texImage->TexFormat),
                  texImage->Width, texImage->Height);
   }

   _mesa_lock_texture(ctx, texObj);
   {
      ctx->Driver.GetCompressedTexImage(ctx, target, level, img,
                                        texObj, texImage);
   }
   _mesa_unlock_texture(ctx, texObj);
}

/**
 * Set the viewport.
 * 
 * \param x, y coordinates of the lower-left corner of the viewport rectangle.
 * \param width width of the viewport rectangle.
 * \param height height of the viewport rectangle.
 *
 * \sa Called via glViewport() or display list execution.
 *
 * Flushes the vertices and calls _mesa_set_viewport() with the given
 * parameters.
 */
void GLAPIENTRY
_mesa_Viewport( GLint x, GLint y, GLsizei width, GLsizei height )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
   _mesa_set_viewport(ctx, x, y, width, height);
}

void
_mesa_LogicOp( GLenum opcode )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glLogicOp");
   switch (opcode) {
      case GL_CLEAR:
      case GL_SET:
      case GL_COPY:
      case GL_COPY_INVERTED:
      case GL_NOOP:
      case GL_INVERT:
      case GL_AND:
      case GL_NAND:
      case GL_OR:
      case GL_NOR:
      case GL_XOR:
      case GL_EQUIV:
      case GL_AND_REVERSE:
      case GL_AND_INVERTED:
      case GL_OR_REVERSE:
      case GL_OR_INVERTED:
         ctx->Color.LogicOp = opcode;
         ctx->NewState |= NEW_RASTER_OPS;
	 return;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glLogicOp" );
	 return;
   }
}

/**
 * Pop the current matrix stack.
 *
 * \sa glPopMatrix().
 * 
 * Flushes the vertices, verifies the current matrix stack is not empty, and
 * moves the stack head down. Marks __GLcontextRec::NewState with the dirty
 * stack flag.
 */
void GLAPIENTRY
_mesa_PopMatrix( void )
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_matrix_stack *stack = ctx->CurrentStack;
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (MESA_VERBOSE&VERBOSE_API)
      _mesa_debug(ctx, "glPopMatrix %s\n",
                  _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));

   if (stack->Depth == 0) {
      if (ctx->Transform.MatrixMode == GL_TEXTURE) {
         _mesa_error(ctx,  GL_STACK_UNDERFLOW,
                     "glPopMatrix(mode=GL_TEXTURE, unit=%d)",
                      ctx->Texture.CurrentUnit);
      }
      else {
         _mesa_error(ctx,  GL_STACK_UNDERFLOW, "glPopMatrix(mode=%s)",
                     _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
      }
      return;
   }
   stack->Depth--;
   stack->Top = &(stack->Stack[stack->Depth]);
   ctx->NewState |= stack->DirtyFlag;
}

void GLAPIENTRY
_mesa_LockArraysEXT(GLint first, GLsizei count)
{
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

    if (MESA_VERBOSE & VERBOSE_API)
        _mesa_debug(ctx, "glLockArrays %d %d\n", first, count);

    if (first == 0 && count > 0 &&
            count <= (GLint) ctx->Const.MaxArrayLockSize) {
        ctx->Array.LockFirst = first;
        ctx->Array.LockCount = count;
    }
    else {
        ctx->Array.LockFirst = 0;
        ctx->Array.LockCount = 0;
    }

    ctx->NewState |= _NEW_ARRAY;
    ctx->Array.NewState |= _NEW_ARRAY_ALL;

    if (ctx->Driver.LockArraysEXT)
        ctx->Driver.LockArraysEXT( ctx, first, count );
}

void GLAPIENTRY
_mesa_FogCoordPointerEXT(GLenum type, GLsizei stride, const GLvoid *ptr)
{
    GLint elementSize;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

    if (stride < 0) {
        _mesa_error( ctx, GL_INVALID_VALUE, "glFogCoordPointer(stride)" );
        return;
    }

    switch (type) {
    case GL_FLOAT:
        elementSize = sizeof(GLfloat);
        break;
    case GL_DOUBLE:
        elementSize = sizeof(GLdouble);
        break;
    default:
        _mesa_error( ctx, GL_INVALID_ENUM, "glFogCoordPointer(type)" );
        return;
    }

    update_array(ctx, &ctx->Array.FogCoord, _NEW_ARRAY_FOGCOORD,
                 elementSize, 1, type, stride, GL_FALSE, ptr);

    if (ctx->Driver.FogCoordPointer)
        ctx->Driver.FogCoordPointer( ctx, type, stride, ptr );
}

void
_mesa_PixelTexGenSGIX(GLenum mode)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelTexGenSGIX");

   switch (mode) {
      case GL_NONE:
         ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
         ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
         break;
      case GL_ALPHA:
         ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
         ctx->Pixel.FragmentAlphaSource = GL_CURRENT_RASTER_COLOR;
         break;
      case GL_RGB:
         ctx->Pixel.FragmentRgbSource = GL_CURRENT_RASTER_COLOR;
         ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
         break;
      case GL_RGBA:
         ctx->Pixel.FragmentRgbSource = GL_CURRENT_RASTER_COLOR;
         ctx->Pixel.FragmentAlphaSource = GL_CURRENT_RASTER_COLOR;
         break;
      default:
         gl_error(ctx, GL_INVALID_ENUM, "glPixelTexGenSGIX(mode)");
         return;
   }
}

void glDrawElements(GLenum mode, GLsizei count,
                    GLenum type, const GLvoid *indices)
{
  GET_CURRENT_CONTEXT(ctx);
  ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

  if (!(ctx->clientstate_flags & GL_VERTEX_ARRAY))
    return;

  _math_matrix_mul_matrix(&ctx->model_projection_matrix,
                          &ctx->viewport.window_map,
                          ctx->projection_matrix_stack.top);
  _math_matrix_mul_matrix(&ctx->model_projection_matrix,
                          &ctx->model_projection_matrix,
                          ctx->modelview_matrix_stack.top);
  switch (mode) {
  case GL_POINTS:
  case GL_LINES:
  case GL_TRIANGLES:
  case GL_QUADS:
    break;
  default:
    _sgl_error(ctx, GL_INVALID_ENUM, "glDrawElements(): Invalid mode\n");
    return;
  }

  ctx->varray.mode = mode;
  ctx->varray.count = count;
  ctx->varray.type = type;
  ctx->varray.indices_ptr = indices;

  ctx->render_state.type = GL_VERTEX_ARRAY;
  _sgl_pipeline_iteration();
}

void
_mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint maxref;

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glStencilFunc");

   switch (func) {
      case GL_NEVER:
      case GL_LESS:
      case GL_LEQUAL:
      case GL_GREATER:
      case GL_GEQUAL:
      case GL_EQUAL:
      case GL_NOTEQUAL:
      case GL_ALWAYS:
         ctx->Stencil.Function = func;
         break;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glStencilFunc" );
         return;
   }

   maxref = (1 << STENCIL_BITS) - 1;
   ctx->Stencil.Ref = (GLstencil) CLAMP( ref, 0, maxref );
   ctx->Stencil.ValueMask = (GLstencil) mask;

   if (ctx->Driver.StencilFunc) {
      (*ctx->Driver.StencilFunc)( ctx, func, ctx->Stencil.Ref, mask );
   }
}

void GLAPIENTRY
_mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
		  GLenum format, GLenum type, GLvoid *pixels )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (width < 0 || height < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE,
                   "glReadPixels(width=%d height=%d)", width, height );
      return;
   }

   if (ctx->NewState)
      _mesa_update_state(ctx);

   if (error_check_format_type(ctx, format, type, GL_FALSE)) {
      /* found an error */
      return;
   }

   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
                  "glReadPixels(incomplete framebuffer)" );
      return;
   }

   if (!_mesa_source_buffer_exists(ctx, format)) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)");
      return;
   }

   ctx->Driver.ReadPixels(ctx, x, y, width, height,
			  format, type, &ctx->Pack, pixels);
}

void GLAPIENTRY
_mesa_LockArraysEXT(GLint first, GLsizei count)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (MESA_VERBOSE & VERBOSE_API)
      _mesa_debug(ctx, "glLockArrays %d %d\n", first, count);

   if (first < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glLockArraysEXT(first)" );
      return;
   }
   if (count <= 0) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glLockArraysEXT(count)" );
      return;
   }
   if (ctx->Array.LockCount != 0) {
      _mesa_error( ctx, GL_INVALID_OPERATION, "glLockArraysEXT(reentry)" );
      return;
   }

   ctx->Array.LockFirst = first;
   ctx->Array.LockCount = count;

   ctx->NewState |= _NEW_ARRAY;
   ctx->Array.NewState |= VERT_BIT_ALL;
}