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/*

 * Mesa 3-D graphics library

 *

 * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 */

/**

 * \file rastpos.c

 * Raster position operations.

 */

#include "glheader.h"

#include "context.h"

#include "feedback.h"

#include "macros.h"

#include "mtypes.h"

#include "rastpos.h"

#include "state.h"

#include "main/dispatch.h"

/**

 * Helper function for all the RasterPos functions.

 */

static void

rasterpos(GLfloat x, GLfloat y, GLfloat z, GLfloat w)

{

   GET_CURRENT_CONTEXT(ctx);

   GLfloat p[4];

   p[0] = x;

   p[1] = y;

   p[2] = z;

   p[3] = w;

   FLUSH_VERTICES(ctx, 0);

   FLUSH_CURRENT(ctx, 0);

   if (ctx->NewState)

      _mesa_update_state( ctx );

   ctx->Driver.RasterPos(ctx, p);

}

void GLAPIENTRY

_mesa_RasterPos2d(GLdouble x, GLdouble y)

{

   rasterpos((GLfloat)x, (GLfloat)y, (GLfloat)0.0, (GLfloat)1.0);

}

void GLAPIENTRY

_mesa_RasterPos2f(GLfloat x, GLfloat y)

{

   rasterpos(x, y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos2i(GLint x, GLint y)

{

   rasterpos((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos2s(GLshort x, GLshort y)

{

   rasterpos(x, y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3d(GLdouble x, GLdouble y, GLdouble z)

{

   rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3f(GLfloat x, GLfloat y, GLfloat z)

{

   rasterpos(x, y, z, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3i(GLint x, GLint y, GLint z)

{

   rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3s(GLshort x, GLshort y, GLshort z)

{

   rasterpos(x, y, z, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos4d(GLdouble x, GLdouble y, GLdouble z, GLdouble w)

{

   rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);

}

void GLAPIENTRY

_mesa_RasterPos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)

{

   rasterpos(x, y, z, w);

}

void GLAPIENTRY

_mesa_RasterPos4i(GLint x, GLint y, GLint z, GLint w)

{

   rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);

}

void GLAPIENTRY

_mesa_RasterPos4s(GLshort x, GLshort y, GLshort z, GLshort w)

{

   rasterpos(x, y, z, w);

}

void GLAPIENTRY

_mesa_RasterPos2dv(const GLdouble *v)

{

   rasterpos((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos2fv(const GLfloat *v)

{

   rasterpos(v[0], v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos2iv(const GLint *v)

{

   rasterpos((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos2sv(const GLshort *v)

{

   rasterpos(v[0], v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3dv(const GLdouble *v)

{

   rasterpos((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3fv(const GLfloat *v)

{

   rasterpos(v[0], v[1], v[2], 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3iv(const GLint *v)

{

   rasterpos((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos3sv(const GLshort *v)

{

   rasterpos(v[0], v[1], v[2], 1.0F);

}

void GLAPIENTRY

_mesa_RasterPos4dv(const GLdouble *v)

{

   rasterpos((GLfloat) v[0], (GLfloat) v[1],

		     (GLfloat) v[2], (GLfloat) v[3]);

}

void GLAPIENTRY

_mesa_RasterPos4fv(const GLfloat *v)

{

   rasterpos(v[0], v[1], v[2], v[3]);

}

void GLAPIENTRY

_mesa_RasterPos4iv(const GLint *v)

{

   rasterpos((GLfloat) v[0], (GLfloat) v[1],

		     (GLfloat) v[2], (GLfloat) v[3]);

}

void GLAPIENTRY

_mesa_RasterPos4sv(const GLshort *v)

{

   rasterpos(v[0], v[1], v[2], v[3]);

}

/**********************************************************************/

/***           GL_ARB_window_pos / GL_MESA_window_pos               ***/

/**********************************************************************/

/**

 * All glWindowPosMESA and glWindowPosARB commands call this function to

 * update the current raster position.

 */

static void

window_pos3f(GLfloat x, GLfloat y, GLfloat z)

{

   GET_CURRENT_CONTEXT(ctx);

   GLfloat z2;

   FLUSH_VERTICES(ctx, 0);

   FLUSH_CURRENT(ctx, 0);

   z2 = CLAMP(z, 0.0F, 1.0F) * (ctx->Viewport.Far - ctx->Viewport.Near)

      + ctx->Viewport.Near;

   /* set raster position */

   ctx->Current.RasterPos[0] = x;

   ctx->Current.RasterPos[1] = y;

   ctx->Current.RasterPos[2] = z2;

   ctx->Current.RasterPos[3] = 1.0F;

   ctx->Current.RasterPosValid = GL_TRUE;

   if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)

      ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];

   else

      ctx->Current.RasterDistance = 0.0;

   /* raster color = current color or index */

   ctx->Current.RasterColor[0]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][0], 0.0F, 1.0F);

   ctx->Current.RasterColor[1]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][1], 0.0F, 1.0F);

   ctx->Current.RasterColor[2]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][2], 0.0F, 1.0F);

   ctx->Current.RasterColor[3]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3], 0.0F, 1.0F);

   ctx->Current.RasterSecondaryColor[0]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][0], 0.0F, 1.0F);

   ctx->Current.RasterSecondaryColor[1]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][1], 0.0F, 1.0F);

   ctx->Current.RasterSecondaryColor[2]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][2], 0.0F, 1.0F);

   ctx->Current.RasterSecondaryColor[3]

      = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][3], 0.0F, 1.0F);

   /* raster texcoord = current texcoord */

   {

      GLuint texSet;

      for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {

         assert(texSet < Elements(ctx->Current.RasterTexCoords));

         COPY_4FV( ctx->Current.RasterTexCoords[texSet],

                  ctx->Current.Attrib[VERT_ATTRIB_TEX0 + texSet] );

      }

   }

   if (ctx->RenderMode==GL_SELECT) {

      _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );

   }

}

/* This is just to support the GL_MESA_window_pos version */

static void

window_pos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)

{

   GET_CURRENT_CONTEXT(ctx);

   window_pos3f(x, y, z);

   ctx->Current.RasterPos[3] = w;

}

void GLAPIENTRY

_mesa_WindowPos2d(GLdouble x, GLdouble y)

{

   window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos2f(GLfloat x, GLfloat y)

{

   window_pos4f(x, y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos2i(GLint x, GLint y)

{

   window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos2s(GLshort x, GLshort y)

{

   window_pos4f(x, y, 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3d(GLdouble x, GLdouble y, GLdouble z)

{

   window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3f(GLfloat x, GLfloat y, GLfloat z)

{

   window_pos4f(x, y, z, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3i(GLint x, GLint y, GLint z)

{

   window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3s(GLshort x, GLshort y, GLshort z)

{

   window_pos4f(x, y, z, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos4dMESA(GLdouble x, GLdouble y, GLdouble z, GLdouble w)

{

   window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);

}

void GLAPIENTRY

_mesa_WindowPos4fMESA(GLfloat x, GLfloat y, GLfloat z, GLfloat w)

{

   window_pos4f(x, y, z, w);

}

void GLAPIENTRY

_mesa_WindowPos4iMESA(GLint x, GLint y, GLint z, GLint w)

{

   window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);

}

void GLAPIENTRY

_mesa_WindowPos4sMESA(GLshort x, GLshort y, GLshort z, GLshort w)

{

   window_pos4f(x, y, z, w);

}

void GLAPIENTRY

_mesa_WindowPos2dv(const GLdouble *v)

{

   window_pos4f((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos2fv(const GLfloat *v)

{

   window_pos4f(v[0], v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos2iv(const GLint *v)

{

   window_pos4f((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos2sv(const GLshort *v)

{

   window_pos4f(v[0], v[1], 0.0F, 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3dv(const GLdouble *v)

{

   window_pos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3fv(const GLfloat *v)

{

   window_pos4f(v[0], v[1], v[2], 1.0);

}

void GLAPIENTRY

_mesa_WindowPos3iv(const GLint *v)

{

   window_pos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos3sv(const GLshort *v)

{

   window_pos4f(v[0], v[1], v[2], 1.0F);

}

void GLAPIENTRY

_mesa_WindowPos4dvMESA(const GLdouble *v)

{

   window_pos4f((GLfloat) v[0], (GLfloat) v[1],

			 (GLfloat) v[2], (GLfloat) v[3]);

}

void GLAPIENTRY

_mesa_WindowPos4fvMESA(const GLfloat *v)

{

   window_pos4f(v[0], v[1], v[2], v[3]);

}

void GLAPIENTRY

_mesa_WindowPos4ivMESA(const GLint *v)

{

   window_pos4f((GLfloat) v[0], (GLfloat) v[1],

			 (GLfloat) v[2], (GLfloat) v[3]);

}

void GLAPIENTRY

_mesa_WindowPos4svMESA(const GLshort *v)

{

   window_pos4f(v[0], v[1], v[2], v[3]);

}

#if 0

/*

 * OpenGL implementation of glWindowPos*MESA()

 */

void glWindowPos4fMESA( GLfloat x, GLfloat y, GLfloat z, GLfloat w )

{

   GLfloat fx, fy;

   /* Push current matrix mode and viewport attributes */

   glPushAttrib( GL_TRANSFORM_BIT | GL_VIEWPORT_BIT );

   /* Setup projection parameters */

   glMatrixMode( GL_PROJECTION );

   glPushMatrix();

   glLoadIdentity();

   glMatrixMode( GL_MODELVIEW );

   glPushMatrix();

   glLoadIdentity();

   glDepthRange( z, z );

   glViewport( (int) x - 1, (int) y - 1, 2, 2 );

   /* set the raster (window) position */

   fx = x - (int) x;

   fy = y - (int) y;

   glRasterPos4f( fx, fy, 0.0, w );

   /* restore matrices, viewport and matrix mode */

   glPopMatrix();

   glMatrixMode( GL_PROJECTION );

   glPopMatrix();

   glPopAttrib();

}

#endif

/**********************************************************************/

/** \name Initialization                                              */

/**********************************************************************/

/*@{*/

/**

 * Initialize the context current raster position information.

 *

 * \param ctx GL context.

 *

 * Initialize the current raster position information in

 * __struct gl_contextRec::Current, and adds the extension entry points to the

 * dispatcher.

 */

void _mesa_init_rastpos( struct gl_context * ctx )

{

   int i;

   ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );

   ctx->Current.RasterDistance = 0.0;

   ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );

   ASSIGN_4V( ctx->Current.RasterSecondaryColor, 0.0, 0.0, 0.0, 1.0 );

   for (i = 0; i < Elements(ctx->Current.RasterTexCoords); i++)

      ASSIGN_4V( ctx->Current.RasterTexCoords[i], 0.0, 0.0, 0.0, 1.0 );

   ctx->Current.RasterPosValid = GL_TRUE;

}

/*@}*/