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windows-nt-4.0/private/windows/opengl/server/soft/so_xform.c

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/*
** Copyright 1991, Silicon Graphics, Inc.
** All Rights Reserved.
**
** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
** the contents of this file may not be disclosed to third parties, copied or
** duplicated in any form, in whole or in part, without the prior written
** permission of Silicon Graphics, Inc.
**
** RESTRICTED RIGHTS LEGEND:
** Use, duplication or disclosure by the Government is subject to restrictions
** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
** rights reserved under the Copyright Laws of the United States.
**
** Transformation procedures.
**
** $Revision: 1.38 $
** $Date: 1993/11/29 20:34:48 $
*/
#include "precomp.h"
#pragma hdrstop
#include "mips.h"
#define __glGenericPickIdentityMatrixProcs(gc, m) \
{ \
(m)->xf1 = __glXForm1_2DNRW; \
(m)->xf2 = __glXForm2_2DNRW; \
(m)->xf3 = __glXForm3_2DNRW; \
(m)->xf4 = __glXForm4_2DNRW; \
}
void FASTCALL __glScaleMatrix(__GLcontext *gc, __GLmatrix *m, void *data);
void FASTCALL __glTranslateMatrix(__GLcontext *gc, __GLmatrix *m, void *data);
void FASTCALL __glMultiplyMatrix(__GLcontext *gc, __GLmatrix *m, void *data);
#ifdef SGI
/*
** Assuming that a->matrixType and b->matrixType are already correct,
** and dst = a * b, then compute dst's matrix type.
*/
void FASTCALL __glPickMatrixType(__GLmatrix *dst, __GLmatrix *a, __GLmatrix *b)
{
switch(a->matrixType) {
case __GL_MT_GENERAL:
dst->matrixType = a->matrixType;
break;
case __GL_MT_W0001:
if (b->matrixType == __GL_MT_GENERAL) {
dst->matrixType = b->matrixType;
} else {
dst->matrixType = a->matrixType;
}
break;
case __GL_MT_IS2D:
if (b->matrixType < __GL_MT_IS2D) {
dst->matrixType = b->matrixType;
} else {
dst->matrixType = a->matrixType;
}
break;
case __GL_MT_IS2DNR:
if (b->matrixType < __GL_MT_IS2DNR) {
dst->matrixType = b->matrixType;
} else {
dst->matrixType = a->matrixType;
}
break;
case __GL_MT_IDENTITY:
#ifdef NT_DEADCODE_MATRIX
if (b->matrixType == __GL_MT_IS2DNRSC) {
dst->width = b->width;
dst->height = b->height;
}
#endif // NT_DEADCODE_MATRIX
dst->matrixType = b->matrixType;
break;
#ifdef NT_DEADCODE_MATRIX
case __GL_MT_IS2DNRSC:
if (b->matrixType == __GL_MT_IDENTITY) {
dst->matrixType = __GL_MT_IS2DNRSC;
dst->width = a->width;
dst->height = a->height;
} else if (b->matrixType < __GL_MT_IS2DNR) {
dst->matrixType = b->matrixType;
} else {
dst->matrixType = __GL_MT_IS2DNR;
}
break;
#endif // NT_DEADCODE_MATRIX
}
}
#endif // SGI
// Bit flags that identify matrix entries that contain 0 or 1.
#define _M00_0 0x00000001
#define _M01_0 0x00000002
#define _M02_0 0x00000004
#define _M03_0 0x00000008
#define _M10_0 0x00000010
#define _M11_0 0x00000020
#define _M12_0 0x00000040
#define _M13_0 0x00000080
#define _M20_0 0x00000100
#define _M21_0 0x00000200
#define _M22_0 0x00000400
#define _M23_0 0x00000800
#define _M30_0 0x00001000
#define _M31_0 0x00002000
#define _M32_0 0x00004000
#define _M33_0 0x00008000
#define _M00_1 0x00010000
#define _M01_1 0x00020000
#define _M02_1 0x00040000
#define _M03_1 0x00080000
#define _M10_1 0x00100000
#define _M11_1 0x00200000
#define _M12_1 0x00400000
#define _M13_1 0x00800000
#define _M20_1 0x01000000
#define _M21_1 0x02000000
#define _M22_1 0x04000000
#define _M23_1 0x08000000
#define _M30_1 0x10000000
#define _M31_1 0x20000000
#define _M32_1 0x40000000
#define _M33_1 0x80000000
// Pre-defined matrix types.
#define _MT_IDENTITY \
(_M00_1 | _M01_0 | _M02_0 | _M03_0 | \
_M10_0 | _M11_1 | _M12_0 | _M13_0 | \
_M20_0 | _M21_0 | _M22_1 | _M23_0 | \
_M30_0 | _M31_0 | _M32_0 | _M33_1)
#define _MT_IS2DNR \
( _M01_0 | _M02_0 | _M03_0 | \
_M10_0 | _M12_0 | _M13_0 | \
_M20_0 | _M21_0 | _M23_0 | \
_M33_1)
#define _MT_IS2D \
( _M02_0 | _M03_0 | \
_M12_0 | _M13_0 | \
_M20_0 | _M21_0 | _M23_0 | \
_M33_1)
#define _MT_W0001 \
( _M03_0 | \
_M13_0 | \
_M23_0 | \
_M33_1)
#define GET_MATRIX_MASK(m,i,j) \
if ((m)->matrix[i][j] == zer) rowMask |= _M##i##j##_0; \
else if ((m)->matrix[i][j] == one) rowMask |= _M##i##j##_1;
// Note: If you are adding a new type, make sure all functions
// using matrixType are correct! (__glScaleMatrix, __glTranslateMatrix,
// __glInvertTransposeMatrix, and __glGenericPickVertexProcs)
void FASTCALL __glUpdateMatrixType(__GLmatrix *m)
{
register __GLfloat zer = __glZero;
register __GLfloat one = __glOne;
DWORD rowMask = 0; // identifies 0 and 1 entries
GET_MATRIX_MASK(m,0,0);
GET_MATRIX_MASK(m,0,1);
GET_MATRIX_MASK(m,0,2);
GET_MATRIX_MASK(m,0,3);
GET_MATRIX_MASK(m,1,0);
GET_MATRIX_MASK(m,1,1);
GET_MATRIX_MASK(m,1,2);
GET_MATRIX_MASK(m,1,3);
GET_MATRIX_MASK(m,2,0);
GET_MATRIX_MASK(m,2,1);
GET_MATRIX_MASK(m,2,2);
GET_MATRIX_MASK(m,2,3);
GET_MATRIX_MASK(m,3,0);
GET_MATRIX_MASK(m,3,1);
GET_MATRIX_MASK(m,3,2);
GET_MATRIX_MASK(m,3,3);
// Some common cases.
// Order of finding matrix type is important!
if ((rowMask & _MT_IDENTITY) == _MT_IDENTITY)
m->matrixType = __GL_MT_IDENTITY;
else if ((rowMask & _MT_IS2DNR) == _MT_IS2DNR)
m->matrixType = __GL_MT_IS2DNR;
else if ((rowMask & _MT_IS2D) == _MT_IS2D)
m->matrixType = __GL_MT_IS2D;
else if ((rowMask & _MT_W0001) == _MT_W0001)
m->matrixType = __GL_MT_W0001;
else
m->matrixType = __GL_MT_GENERAL;
}
static void SetDepthRange(__GLcontext *gc, double zNear, double zFar)
{
__GLviewport *vp = &gc->state.viewport;
double scale, zero = __glZero, one = __glOne;
/* Clamp depth range to legal values */
if (zNear < zero) zNear = zero;
if (zNear > one) zNear = one;
if (zFar < zero) zFar = zero;
if (zFar > one) zFar = one;
vp->zNear = zNear;
vp->zFar = zFar;
/* Compute viewport values for the new depth range */
if (((__GLGENcontext *)gc)->pMcdState)
scale = GENACCEL(gc).zDevScale * __glHalf;
else
scale = gc->depthBuffer.scale * __glHalf;
gc->state.viewport.zScale = (zFar - zNear) * scale;
gc->state.viewport.zCenter = (zFar + zNear) * scale;
#ifdef _MCD_
MCD_STATE_DIRTY(gc, VIEWPORT);
#endif
}
#ifdef NT_DEADCODE_NOT_USED
void FASTCALL __glUpdateDepthRange(__GLcontext *gc)
{
__GLviewport *vp = &gc->state.viewport;
SetDepthRange(gc, vp->zNear, vp->zFar);
}
#endif // NT_DEADCODE_NOT_USED
void FASTCALL __glInitTransformState(__GLcontext *gc)
{
GLint i, numClipPlanes;
__GLtransform *tr;
__GLtransformP *ptr;
__GLtransformT *ttr;
__GLvertex *vx;
/* Allocate memory for clip planes */
numClipPlanes = gc->constants.numberOfClipPlanes;
gc->state.transform.eyeClipPlanes = (__GLcoord *)
(*gc->imports.calloc)(gc, (size_t) numClipPlanes, sizeof(__GLcoord));
#ifdef NT
if (NULL == gc->state.transform.eyeClipPlanes)
return;
#endif
/* Allocate memory for matrix stacks */
gc->transform.modelViewStack = (__GLtransform*)
(*gc->imports.calloc)(gc, (size_t) __GL_WGL_MAX_MODELVIEW_STACK_DEPTH,
sizeof(__GLtransform));
#ifdef NT
if (NULL == gc->transform.modelViewStack)
return;
#endif
gc->transform.projectionStack = (__GLtransformP*)
(*gc->imports.calloc)(gc, (size_t) __GL_WGL_MAX_PROJECTION_STACK_DEPTH,
sizeof(__GLtransformP));
#ifdef NT
if (NULL == gc->transform.projectionStack)
return;
#endif
gc->transform.textureStack = (__GLtransformT*)
(*gc->imports.calloc)(gc, (size_t) __GL_WGL_MAX_TEXTURE_STACK_DEPTH,
sizeof(__GLtransformT));
#ifdef NT
if (NULL == gc->transform.textureStack)
return;
#endif
/* Allocate memory for clipping temporaries */
gc->transform.clipTemp = (__GLvertex*)
(*gc->imports.calloc)(gc, (size_t) (6 + numClipPlanes),
sizeof(__GLvertex));
#ifdef NT
if (NULL == gc->transform.clipTemp)
return;
#endif
gc->state.transform.matrixMode = GL_MODELVIEW;
SetDepthRange(gc, __glZero, __glOne);
gc->transform.modelView = tr = &gc->transform.modelViewStack[0];
__glMakeIdentity(&tr->matrix);
__glGenericPickIdentityMatrixProcs(gc, &tr->matrix);
__glMakeIdentity(&tr->inverseTranspose);
__glGenericPickIdentityMatrixProcs(gc, &tr->inverseTranspose);
tr->updateInverse = GL_FALSE;
__glMakeIdentity(&tr->mvp);
gc->transform.projection = ptr = &gc->transform.projectionStack[0];
__glMakeIdentity((__GLmatrix *) &ptr->matrix);
__glGenericPickMvpMatrixProcs(gc, &tr->mvp);
gc->transform.texture = ttr = &gc->transform.textureStack[0];
__glMakeIdentity(&ttr->matrix);
__glGenericPickIdentityMatrixProcs(gc, &ttr->matrix);
vx = &gc->transform.clipTemp[0];
for (i = 0; i < 6 + numClipPlanes; i++, vx++) {/*XXX*/
vx->color = &vx->colors[__GL_FRONTFACE];
#ifdef NT_DEADCODE_POLYARRAY
vx->validate = __glValidateVertex4;
#endif
}
gc->state.current.normal.z = __glOne;
}
#ifdef NT_DEADCODE_MATRIX
// The probability is practically nil, don't bother to check this. - hockl
/*
** An amazing thing has happened. More than 2^32 changes to the projection
** matrix has occured. Run through the modelView and projection stacks
** and reset the sequence numbers to force a revalidate on next usage.
*/
void FASTCALL __glInvalidateSequenceNumbers(__GLcontext *gc)
{
__GLtransform *tr, *lasttr;
__GLtransformP *ptr, *lastptr;
GLuint s;
/* Make all mvp matricies refer to sequence number zero */
s = 0;
tr = &gc->transform.modelViewStack[0];
lasttr = tr + __GL_WGL_MAX_MODELVIEW_STACK_DEPTH;
while (tr < lasttr) {
tr->sequence = s;
tr++;
}
/* Make all projection matricies sequence up starting at one */
s = 1;
ptr = &gc->transform.projectionStack[0];
lastptr = ptr + __GL_WGL_MAX_PROJECTION_STACK_DEPTH;
while (ptr < lastptr) {
ptr->sequence = s++;
ptr++;
}
gc->transform.projectionSequence = s;
}
#endif // NT_DEADCODE_MATRIX
/************************************************************************/
void APIPRIVATE __glim_MatrixMode(GLenum mode)
{
__GL_SETUP_NOT_IN_BEGIN();
switch (mode) {
case GL_MODELVIEW:
case GL_PROJECTION:
case GL_TEXTURE:
break;
default:
__glSetError(GL_INVALID_ENUM);
return;
}
gc->state.transform.matrixMode = mode;
#ifdef NT_DEADCODE_MATRIX
__GL_DELAY_VALIDATE(gc);
#endif // NT_DEADCODE_MATRIX
}
void APIPRIVATE __glim_LoadIdentity(void)
{
__GL_SETUP_NOT_IN_BEGIN();
__glDoLoadMatrix(gc, NULL, TRUE);
}
void APIPRIVATE __glim_LoadMatrixf(const GLfloat m[16])
{
__GL_SETUP_NOT_IN_BEGIN();
__glDoLoadMatrix(gc, (__GLfloat (*)[4])m, FALSE);
}
#ifdef NT_DEADCODE_MATRIX
void APIPRIVATE __glim_LoadMatrixd(const GLdouble m[16])
{
GLfloat m1[16];
__GL_SETUP_NOT_IN_BEGIN();
m1[0] = m[0];
m1[1] = m[1];
m1[2] = m[2];
m1[3] = m[3];
m1[4] = m[4];
m1[5] = m[5];
m1[6] = m[6];
m1[7] = m[7];
m1[8] = m[8];
m1[9] = m[9];
m1[10] = m[10];
m1[11] = m[11];
m1[12] = m[12];
m1[13] = m[13];
m1[14] = m[14];
m1[15] = m[15];
__glDoLoadMatrix(gc, m1, FALSE);
}
#endif // NT_DEADCODE_MATRIX
void APIPRIVATE __glim_MultMatrixf(const GLfloat m[16])
{
__GL_SETUP_NOT_IN_BEGIN();
__glDoMultMatrix(gc, (void *) m, __glMultiplyMatrix);
}
#ifdef NT_DEADCODE_MATRIX
void APIPRIVATE __glim_MultMatrixd(const GLdouble m[16])
{
__GLmatrix m1;
__GL_SETUP_NOT_IN_BEGIN();
m1.matrix[0][0] = m[0];
m1.matrix[0][1] = m[1];
m1.matrix[0][2] = m[2];
m1.matrix[0][3] = m[3];
m1.matrix[1][0] = m[4];
m1.matrix[1][1] = m[5];
m1.matrix[1][2] = m[6];
m1.matrix[1][3] = m[7];
m1.matrix[2][0] = m[8];
m1.matrix[2][1] = m[9];
m1.matrix[2][2] = m[10];
m1.matrix[2][3] = m[11];
m1.matrix[3][0] = m[12];
m1.matrix[3][1] = m[13];
m1.matrix[3][2] = m[14];
m1.matrix[3][3] = m[15];
__glDoMultMatrix(gc, &m1.matrix, __glMultiplyMatrix);
}
#endif // NT_DEADCODE_MATRIX
void APIPRIVATE __glim_Rotatef(GLfloat angle, GLfloat ax, GLfloat ay, GLfloat az)
{
__GLmatrix m;
__GLfloat radians, sine, cosine, ab, bc, ca, t;
__GLfloat av[4], axis[4];
__GL_SETUP_NOT_IN_BEGIN();
av[0] = ax;
av[1] = ay;
av[2] = az;
av[3] = 0;
__glNormalize(axis, av);
radians = angle * __glDegreesToRadians;
sine = __GL_SINF(radians);
cosine = __GL_COSF(radians);
ab = axis[0] * axis[1] * (1 - cosine);
bc = axis[1] * axis[2] * (1 - cosine);
ca = axis[2] * axis[0] * (1 - cosine);
#ifdef NT
m.matrix[0][3] = __glZero;
m.matrix[1][3] = __glZero;
m.matrix[2][3] = __glZero;
m.matrix[3][0] = __glZero;
m.matrix[3][1] = __glZero;
m.matrix[3][2] = __glZero;
m.matrix[3][3] = __glOne;
#else
__glMakeIdentity(&m);
#endif // NT
t = axis[0] * axis[0];
m.matrix[0][0] = t + cosine * (1 - t);
m.matrix[2][1] = bc - axis[0] * sine;
m.matrix[1][2] = bc + axis[0] * sine;
t = axis[1] * axis[1];
m.matrix[1][1] = t + cosine * (1 - t);
m.matrix[2][0] = ca + axis[1] * sine;
m.matrix[0][2] = ca - axis[1] * sine;
t = axis[2] * axis[2];
m.matrix[2][2] = t + cosine * (1 - t);
m.matrix[1][0] = ab - axis[2] * sine;
m.matrix[0][1] = ab + axis[2] * sine;
#ifdef NT_DEADCODE_MATRIX
if (ax == __glZero && ay == __glZero) {
m.matrixType = __GL_MT_IS2D;
} else {
m.matrixType = __GL_MT_W0001;
}
#endif // NT_DEADCODE_MATRIX
__glDoMultMatrix(gc, &m, __glMultiplyMatrix);
}
#ifdef NT_DEADCODE_MATRIX
void APIPRIVATE __glim_Rotated(GLdouble angle, GLdouble x, GLdouble y, GLdouble z)
{
__glim_Rotatef((GLfloat) angle, (GLfloat) x, (GLfloat) y, (GLfloat) z);
}
#endif // NT_DEADCODE_MATRIX
struct __glScaleRec {
__GLfloat x,y,z;
};
void APIPRIVATE __glim_Scalef(GLfloat x, GLfloat y, GLfloat z)
{
struct __glScaleRec scale;
__GL_SETUP_NOT_IN_BEGIN();
scale.x = x;
scale.y = y;
scale.z = z;
__glDoMultMatrix(gc, &scale, __glScaleMatrix);
}
#ifdef NT_DEADCODE_MATRIX
void APIPRIVATE __glim_Scaled(GLdouble x, GLdouble y, GLdouble z)
{
__glim_Scalef((GLfloat) x, (GLfloat) y, (GLfloat) z);
}
#endif // NT_DEADCODE_MATRIX
struct __glTranslationRec {
__GLfloat x,y,z;
};
void APIPRIVATE __glim_Translatef(GLfloat x, GLfloat y, GLfloat z)
{
struct __glTranslationRec trans;
__GL_SETUP_NOT_IN_BEGIN();
trans.x = x;
trans.y = y;
trans.z = z;
__glDoMultMatrix(gc, &trans, __glTranslateMatrix);
}
#ifdef NT_DEADCODE_MATRIX
void APIPRIVATE __glim_Translated(GLdouble x, GLdouble y, GLdouble z)
{
__glim_Translate((GLfloat) x, (GLfloat) y, (GLfloat) z);
}
#endif // NT_DEADCODE_MATRIX
void APIPRIVATE __glim_PushMatrix(void)
{
#ifdef NT
__GL_SETUP_NOT_IN_BEGIN(); // no need to validate
switch (gc->state.transform.matrixMode)
{
case GL_MODELVIEW:
__glPushModelViewMatrix(gc);
break;
case GL_PROJECTION:
__glPushProjectionMatrix(gc);
break;
case GL_TEXTURE:
__glPushTextureMatrix(gc);
break;
}
#else
__GL_SETUP_NOT_IN_BEGIN_VALIDATE();
(*gc->procs.pushMatrix)(gc);
#endif
}
void APIPRIVATE __glim_PopMatrix(void)
{
#ifdef NT
__GL_SETUP_NOT_IN_BEGIN(); // no need to validate
switch (gc->state.transform.matrixMode)
{
case GL_MODELVIEW:
__glPopModelViewMatrix(gc);
break;
case GL_PROJECTION:
__glPopProjectionMatrix(gc);
break;
case GL_TEXTURE:
__glPopTextureMatrix(gc);
break;
}
#else
__GL_SETUP_NOT_IN_BEGIN_VALIDATE();
(*gc->procs.popMatrix)(gc);
#endif
}
void APIPRIVATE __glim_Frustum(GLdouble left, GLdouble right,
GLdouble bottom, GLdouble top,
GLdouble zNear, GLdouble zFar)
{
__GLmatrix m;
__GLfloat deltaX, deltaY, deltaZ;
__GL_SETUP_NOT_IN_BEGIN();
deltaX = right - left;
deltaY = top - bottom;
deltaZ = zFar - zNear;
if ((zNear <= (GLdouble) __glZero) || (zFar <= (GLdouble) __glZero) || (deltaX == __glZero) ||
(deltaY == __glZero) || (deltaZ == __glZero)) {
__glSetError(GL_INVALID_VALUE);
return;
}
#ifdef NT
m.matrix[0][1] = __glZero;
m.matrix[0][2] = __glZero;
m.matrix[0][3] = __glZero;
m.matrix[1][0] = __glZero;
m.matrix[1][2] = __glZero;
m.matrix[1][3] = __glZero;
m.matrix[3][0] = __glZero;
m.matrix[3][1] = __glZero;
#else
__glMakeIdentity(&m);
#endif
m.matrix[0][0] = zNear * __glDoubleTwo / deltaX;
m.matrix[1][1] = zNear * __glDoubleTwo / deltaY;
m.matrix[2][0] = (right + left) / deltaX;
m.matrix[2][1] = (top + bottom) / deltaY;
m.matrix[2][2] = -(zFar + zNear) / deltaZ;
m.matrix[2][3] = __glMinusOne;
m.matrix[3][2] = __glDoubleMinusTwo * zNear * zFar / deltaZ;
m.matrix[3][3] = __glZero;
#ifdef NT_DEADCODE_MATRIX
m.matrixType = __GL_MT_GENERAL;
#endif // NT_DEADCODE_MATRIX
__glDoMultMatrix(gc, &m, __glMultiplyMatrix);
}
void APIPRIVATE __glim_Ortho(GLdouble left, GLdouble right, GLdouble bottom,
GLdouble top, GLdouble zNear, GLdouble zFar)
{
__GLmatrix m;
GLdouble deltax, deltay, deltaz;
__GL_SETUP_NOT_IN_BEGIN();
deltax = right - left;
deltay = top - bottom;
deltaz = zFar - zNear;
if ((deltax == (GLdouble) __glZero) || (deltay == (GLdouble) __glZero) || (deltaz == (GLdouble) __glZero)) {
__glSetError(GL_INVALID_VALUE);
return;
}
#ifdef NT
m.matrix[0][1] = __glZero;
m.matrix[0][2] = __glZero;
m.matrix[0][3] = __glZero;
m.matrix[1][0] = __glZero;
m.matrix[1][2] = __glZero;
m.matrix[1][3] = __glZero;
m.matrix[2][0] = __glZero;
m.matrix[2][1] = __glZero;
m.matrix[2][3] = __glZero;
m.matrix[3][3] = __glOne;
#else
__glMakeIdentity(&m);
#endif
m.matrix[0][0] = __glDoubleTwo / deltax;
m.matrix[3][0] = -(right + left) / deltax;
m.matrix[1][1] = __glDoubleTwo / deltay;
m.matrix[3][1] = -(top + bottom) / deltay;
m.matrix[2][2] = __glDoubleMinusTwo / deltaz;
m.matrix[3][2] = -(zFar + zNear) / deltaz;
#ifdef NT_DEADCODE_MATRIX
/*
** Screen coordinates matrix?
*/
zero = (GLdouble) 0.0;
if (left == zero &&
bottom == zero &&
right == (GLdouble) gc->state.viewport.width &&
top == (GLdouble) gc->state.viewport.height &&
zNear <= zero &&
zFar >= zero) {
m.matrixType = __GL_MT_IS2DNRSC;
m.width = gc->state.viewport.width;
m.height = gc->state.viewport.height;
} else {
m.matrixType = __GL_MT_IS2DNR;
}
#endif // NT_DEADCODE_MATRIX
__glDoMultMatrix(gc, &m, __glMultiplyMatrix);
}
void FASTCALL __glUpdateViewport(__GLcontext *gc)
{
__GLfloat ww, hh, w2, h2;
/* Compute operational viewport values */
w2 = gc->state.viewport.width * __glHalf;
h2 = gc->state.viewport.height * __glHalf;
ww = w2 - gc->constants.viewportEpsilon;
hh = h2 - gc->constants.viewportEpsilon;
gc->state.viewport.xScale = ww;
gc->state.viewport.xCenter = gc->state.viewport.x + w2 +
gc->constants.fviewportXAdjust;
if (gc->constants.yInverted) {
gc->state.viewport.yScale = -hh;
gc->state.viewport.yCenter =
gc->constants.height - (gc->state.viewport.y + h2) +
gc->constants.fviewportYAdjust;
#if 0
DbgPrint("UV ys %.3lf, yc %.3lf (%.3lf)\n",
-hh, gc->state.viewport.yCenter,
gc->constants.height - (gc->state.viewport.y + h2));
#endif
} else {
gc->state.viewport.yScale = hh;
gc->state.viewport.yCenter = gc->state.viewport.y + h2 +
gc->constants.fviewportYAdjust;
}
}
void FASTCALL __glUpdateViewportDependents(__GLcontext *gc)
{
/*
** Now that the implementation may have found us a new window size,
** we compute these offsets...
*/
gc->transform.minx = gc->state.viewport.x + gc->constants.viewportXAdjust;
gc->transform.maxx = gc->transform.minx + gc->state.viewport.width;
gc->transform.fminx = gc->transform.minx;
gc->transform.fmaxx = gc->transform.maxx;
gc->transform.miny =
(gc->constants.height -
(gc->state.viewport.y + gc->state.viewport.height)) +
gc->constants.viewportYAdjust;
gc->transform.maxy = gc->transform.miny + gc->state.viewport.height;
gc->transform.fminy = gc->transform.miny;
gc->transform.fmaxy = gc->transform.maxy;
}
void APIPRIVATE __glim_Viewport(GLint x, GLint y, GLsizei w, GLsizei h)
{
__GLfloat ww, hh;
__GL_SETUP_NOT_IN_BEGIN();
if ((w < 0) || (h < 0)) {
__glSetError(GL_INVALID_VALUE);
return;
}
if (h > gc->constants.maxViewportHeight) {
h = gc->constants.maxViewportHeight;
}
if (w > gc->constants.maxViewportWidth) {
w = gc->constants.maxViewportWidth;
}
gc->state.viewport.x = x;
gc->state.viewport.y = y;
gc->state.viewport.width = w;
gc->state.viewport.height = h;
__glUpdateViewport(gc);
(*gc->procs.applyViewport)(gc);
__glUpdateViewportDependents(gc);
/*
** Pickers that notice when the transformation matches the viewport
** exactly need to be revalidated. Ugh.
*/
__GL_DELAY_VALIDATE(gc);
}
void APIPRIVATE __glim_DepthRange(GLdouble zNear, GLdouble zFar)
{
__GL_SETUP_NOT_IN_BEGIN();
SetDepthRange(gc, zNear, zFar);
__GL_DELAY_VALIDATE_MASK(gc, __GL_DIRTY_DEPTH);
}
void APIPRIVATE __glim_Scissor(GLint x, GLint y, GLsizei w, GLsizei h)
{
__GL_SETUP_NOT_IN_BEGIN();
if ((w < 0) || (h < 0)) {
__glSetError(GL_INVALID_VALUE);
return;
}
gc->state.scissor.scissorX = x;
gc->state.scissor.scissorY = y;
gc->state.scissor.scissorWidth = w;
gc->state.scissor.scissorHeight = h;
#ifdef NT
#ifdef _MCD_
MCD_STATE_DIRTY(gc, SCISSOR);
#endif
// applyViewport does both
(*gc->procs.applyViewport)(gc);
#else
(*gc->procs.applyScissor)(gc);
(*gc->procs.computeClipBox)(gc);
#endif
}
void APIPRIVATE __glim_ClipPlane(GLenum pi, const GLdouble pv[])
{
__GLfloat p[4];
__GLtransform *tr;
__GL_SETUP_NOT_IN_BEGIN();
pi -= GL_CLIP_PLANE0;
#ifdef NT
// pi is unsigned!
if (pi >= (GLenum) gc->constants.numberOfClipPlanes) {
#else
if ((pi < 0) || (pi >= gc->constants.numberOfClipPlanes)) {
#endif // NT
__glSetError(GL_INVALID_ENUM);
return;
}
p[0] = pv[0];
p[1] = pv[1];
p[2] = pv[2];
p[3] = pv[3];
/*
** Project user clip plane into eye space.
*/
tr = gc->transform.modelView;
if (tr->updateInverse) {
__glComputeInverseTranspose(gc, tr);
}
(*tr->inverseTranspose.xf4)(&gc->state.transform.eyeClipPlanes[pi], p,
&tr->inverseTranspose);
__GL_DELAY_VALIDATE(gc);
#ifdef _MCD_
MCD_STATE_DIRTY(gc, CLIPCTRL);
#endif
}
/************************************************************************/
void FASTCALL __glPushModelViewMatrix(__GLcontext *gc)
{
__GLtransform **trp, *tr, *stack;
trp = &gc->transform.modelView;
stack = gc->transform.modelViewStack;
tr = *trp;
if (tr < &stack[__GL_WGL_MAX_MODELVIEW_STACK_DEPTH-1]) {
tr[1] = tr[0];
*trp = tr + 1;
} else {
__glSetError(GL_STACK_OVERFLOW);
}
}
void FASTCALL __glPopModelViewMatrix(__GLcontext *gc)
{
__GLtransform **trp, *tr, *stack, *mvtr;
__GLtransformP *ptr;
trp = &gc->transform.modelView;
stack = gc->transform.modelViewStack;
tr = *trp;
if (tr > &stack[0]) {
*trp = tr - 1;
/*
** See if sequence number of modelView matrix is the same as the
** sequence number of the projection matrix. If not, then
** recompute the mvp matrix.
*/
mvtr = gc->transform.modelView;
ptr = gc->transform.projection;
if (mvtr->sequence != ptr->sequence) {
mvtr->sequence = ptr->sequence;
__glMultMatrix(&mvtr->mvp, &mvtr->matrix, (__GLmatrix *) &ptr->matrix);
__glUpdateMatrixType(&mvtr->mvp);
}
__glGenericPickMvpMatrixProcs(gc, &mvtr->mvp);
} else {
__glSetError(GL_STACK_UNDERFLOW);
return;
}
}
void FASTCALL __glComputeInverseTranspose(__GLcontext *gc, __GLtransform *tr)
{
__GLmatrix inv;
__glInvertTransposeMatrix(&tr->inverseTranspose, &tr->matrix);
__glUpdateMatrixType(&tr->inverseTranspose);
__glGenericPickMatrixProcs(gc, &tr->inverseTranspose);
tr->updateInverse = GL_FALSE;
}
/************************************************************************/
void FASTCALL __glPushProjectionMatrix(__GLcontext *gc)
{
__GLtransformP **trp, *tr, *stack;
trp = &gc->transform.projection;
stack = gc->transform.projectionStack;
tr = *trp;
if (tr < &stack[__GL_WGL_MAX_PROJECTION_STACK_DEPTH-1]) {
tr[1] = tr[0];
*trp = tr + 1;
} else {
__glSetError(GL_STACK_OVERFLOW);
}
}
void FASTCALL __glPopProjectionMatrix(__GLcontext *gc)
{
__GLtransform *mvtr;
__GLtransformP **trp, *tr, *stack, *ptr;
trp = &gc->transform.projection;
stack = gc->transform.projectionStack;
tr = *trp;
if (tr > &stack[0]) {
*trp = tr - 1;
/*
** See if sequence number of modelView matrix is the same as the
** sequence number of the projection matrix. If not, then
** recompute the mvp matrix.
*/
mvtr = gc->transform.modelView;
ptr = gc->transform.projection;
if (mvtr->sequence != ptr->sequence) {
mvtr->sequence = ptr->sequence;
__glMultMatrix(&mvtr->mvp, &mvtr->matrix, (__GLmatrix *) &ptr->matrix);
__glUpdateMatrixType(&mvtr->mvp);
}
__glGenericPickMvpMatrixProcs(gc, &mvtr->mvp);
} else {
__glSetError(GL_STACK_UNDERFLOW);
return;
}
}
/************************************************************************/
void FASTCALL __glPushTextureMatrix(__GLcontext *gc)
{
__GLtransformT **trp, *tr, *stack;
trp = &gc->transform.texture;
stack = gc->transform.textureStack;
tr = *trp;
if (tr < &stack[__GL_WGL_MAX_TEXTURE_STACK_DEPTH-1]) {
tr[1] = tr[0];
*trp = tr + 1;
} else {
__glSetError(GL_STACK_OVERFLOW);
}
}
void FASTCALL __glPopTextureMatrix(__GLcontext *gc)
{
__GLtransformT **trp, *tr, *stack;
trp = &gc->transform.texture;
stack = gc->transform.textureStack;
tr = *trp;
if (tr > &stack[0]) {
*trp = tr - 1;
} else {
__glSetError(GL_STACK_UNDERFLOW);
return;
}
}
/************************************************************************/
void FASTCALL __glDoLoadMatrix(__GLcontext *gc, const __GLfloat m[4][4], BOOL bIsIdentity)
{
__GLtransform *mvtr;
__GLtransformP *ptr;
__GLtransformT *ttr;
switch (gc->state.transform.matrixMode) {
case GL_MODELVIEW:
mvtr = gc->transform.modelView;
if (bIsIdentity)
{
__glMakeIdentity(&mvtr->matrix);
__glGenericPickIdentityMatrixProcs(gc, &mvtr->matrix);
__glMakeIdentity(&mvtr->inverseTranspose);
__glGenericPickIdentityMatrixProcs(gc, &mvtr->inverseTranspose);
mvtr->updateInverse = GL_FALSE;
}
else
{
*(__GLmatrixBase *)mvtr->matrix.matrix = *(__GLmatrixBase *)m;
__glUpdateMatrixType(&mvtr->matrix);
__glGenericPickMatrixProcs(gc, &mvtr->matrix);
mvtr->updateInverse = GL_TRUE;
}
/* Update mvp matrix */
ptr = gc->transform.projection;
ASSERTOPENGL(mvtr->sequence == ptr->sequence,
"__glDoLoadMatrix: bad projection sequence\n");
if (bIsIdentity)
{
*(__GLmatrixBase *)mvtr->mvp.matrix = *(__GLmatrixBase *)ptr->matrix.matrix;
mvtr->mvp.matrixType = ptr->matrix.matrixType;
}
else
{
__glMultMatrix(&mvtr->mvp, &mvtr->matrix, (__GLmatrix *) &ptr->matrix);
__glUpdateMatrixType(&mvtr->mvp);
}
__glGenericPickMvpMatrixProcs(gc, &mvtr->mvp);
break;
case GL_PROJECTION:
ptr = gc->transform.projection;
if (bIsIdentity)
{
__glMakeIdentity((__GLmatrix *) &ptr->matrix);
}
else
{
*(__GLmatrixBase *)ptr->matrix.matrix = *(__GLmatrixBase *)m;
__glUpdateMatrixType((__GLmatrix *) &ptr->matrix);
}
#ifdef NT
ptr->sequence = ++gc->transform.projectionSequence;
#else
if (++gc->transform.projectionSequence == 0) {
__glInvalidateSequenceNumbers(gc);
} else {
ptr->sequence = gc->transform.projectionSequence;
}
#endif // NT
/* Update mvp matrix */
mvtr = gc->transform.modelView;
mvtr->sequence = ptr->sequence;
if (bIsIdentity)
{
*(__GLmatrixBase *)mvtr->mvp.matrix = *(__GLmatrixBase *)mvtr->matrix.matrix;
mvtr->mvp.matrixType = mvtr->matrix.matrixType;
}
else
{
__glMultMatrix(&mvtr->mvp, &mvtr->matrix, (__GLmatrix *) &ptr->matrix);
__glUpdateMatrixType(&mvtr->mvp);
}
__glGenericPickMvpMatrixProcs(gc, &mvtr->mvp);
break;
case GL_TEXTURE:
ttr = gc->transform.texture;
if (bIsIdentity)
{
__glMakeIdentity(&ttr->matrix);
__glGenericPickIdentityMatrixProcs(gc, &ttr->matrix);
}
else
{
*(__GLmatrixBase *)ttr->matrix.matrix = *(__GLmatrixBase *)m;
__glUpdateMatrixType(&ttr->matrix);
__glGenericPickMatrixProcs(gc, &ttr->matrix);
}
break;
}
}
void FASTCALL __glDoMultMatrix(__GLcontext *gc, void *data,
void (FASTCALL *multiply)(__GLcontext *gc, __GLmatrix *m, void *data))
{
__GLtransform *mvtr;
__GLtransformT *ttr;
__GLtransformP *ptr;
switch (gc->state.transform.matrixMode) {
case GL_MODELVIEW:
mvtr = gc->transform.modelView;
(*multiply)(gc, &mvtr->matrix, data);
mvtr->updateInverse = GL_TRUE;
__glGenericPickMatrixProcs(gc, &mvtr->matrix);
/* Update mvp matrix */
ASSERTOPENGL(mvtr->sequence == gc->transform.projection->sequence,
"__glDoMultMatrix: bad projection sequence\n");
(*multiply)(gc, &mvtr->mvp, data);
__glGenericPickMvpMatrixProcs(gc, &mvtr->mvp);
break;
case GL_PROJECTION:
ptr = gc->transform.projection;
(*multiply)(gc, (__GLmatrix *) &ptr->matrix, data);
#ifdef NT
ptr->sequence = ++gc->transform.projectionSequence;
#else
if (++gc->transform.projectionSequence == 0) {
__glInvalidateSequenceNumbers(gc);
} else {
ptr->sequence = gc->transform.projectionSequence;
}
#endif // NT_DEADCODE_MATRIX
/* Update mvp matrix */
mvtr = gc->transform.modelView;
mvtr->sequence = ptr->sequence;
__glMultMatrix(&mvtr->mvp, &mvtr->matrix, (__GLmatrix *) &ptr->matrix);
__glUpdateMatrixType(&mvtr->mvp);
__glGenericPickMvpMatrixProcs(gc, &mvtr->mvp);
break;
case GL_TEXTURE:
ttr = gc->transform.texture;
(*multiply)(gc, &ttr->matrix, data);
__glGenericPickMatrixProcs(gc, &ttr->matrix);
break;
}
}
/************************************************************************/
/*
** Muliply the first matrix by the second one keeping track of the matrix
** type of the newly combined matrix.
*/
void FASTCALL __glMultiplyMatrix(__GLcontext *gc, __GLmatrix *m, void *data)
{
__GLmatrix *tm;
tm = data;
__glMultMatrix(m, tm, m);
__glUpdateMatrixType(m);
}
void FASTCALL __glScaleMatrix(__GLcontext *gc, __GLmatrix *m, void *data)
{
struct __glScaleRec *scale;
__GLfloat x,y,z;
__GLfloat M0, M1, M2, M3;
if (m->matrixType > __GL_MT_IS2DNR) {
m->matrixType = __GL_MT_IS2DNR;
}
scale = data;
x = scale->x;
y = scale->y;
z = scale->z;
M0 = x * m->matrix[0][0];
M1 = x * m->matrix[0][1];
M2 = x * m->matrix[0][2];
M3 = x * m->matrix[0][3];
m->matrix[0][0] = M0;
m->matrix[0][1] = M1;
m->matrix[0][2] = M2;
m->matrix[0][3] = M3;
M0 = y * m->matrix[1][0];
M1 = y * m->matrix[1][1];
M2 = y * m->matrix[1][2];
M3 = y * m->matrix[1][3];
m->matrix[1][0] = M0;
m->matrix[1][1] = M1;
m->matrix[1][2] = M2;
m->matrix[1][3] = M3;
M0 = z * m->matrix[2][0];
M1 = z * m->matrix[2][1];
M2 = z * m->matrix[2][2];
M3 = z * m->matrix[2][3];
m->matrix[2][0] = M0;
m->matrix[2][1] = M1;
m->matrix[2][2] = M2;
m->matrix[2][3] = M3;
}
/*
** Matrix type of m stays the same.
*/
void FASTCALL __glTranslateMatrix(__GLcontext *gc, __GLmatrix *m, void *data)
{
struct __glTranslationRec *trans;
__GLfloat x,y,z;
__GLfloat M30, M31, M32, M33;
if (m->matrixType > __GL_MT_IS2DNR) {
m->matrixType = __GL_MT_IS2DNR;
}
trans = data;
x = trans->x;
y = trans->y;
z = trans->z;
M30 = x * m->matrix[0][0] + y * m->matrix[1][0] + z * m->matrix[2][0] +
m->matrix[3][0];
M31 = x * m->matrix[0][1] + y * m->matrix[1][1] + z * m->matrix[2][1] +
m->matrix[3][1];
M32 = x * m->matrix[0][2] + y * m->matrix[1][2] + z * m->matrix[2][2] +
m->matrix[3][2];
M33 = x * m->matrix[0][3] + y * m->matrix[1][3] + z * m->matrix[2][3] +
m->matrix[3][3];
m->matrix[3][0] = M30;
m->matrix[3][1] = M31;
m->matrix[3][2] = M32;
m->matrix[3][3] = M33;
}
/************************************************************************/
#ifdef NT_DEADCODE_CLIPBOX
/*
** Compute the clip box from the scissor (if enabled) and the window
** size. The resulting clip box is used to clip primitive rasterization
** against. The "window system" is responsible for doing the fine
** grain clipping (i.e., dealing with overlapping windows, etc.).
*/
void FASTCALL __glComputeClipBox(__GLcontext *gc)
{
__GLscissor *sp = &gc->state.scissor;
GLint llx;
GLint lly;
GLint urx;
GLint ury;
if (gc->state.enables.general & __GL_SCISSOR_TEST_ENABLE) {
llx = sp->scissorX;
lly = sp->scissorY;
urx = llx + sp->scissorWidth;
ury = lly + sp->scissorHeight;
if ((urx < 0) || (ury < 0) ||
(urx <= llx) || (ury <= lly) ||
(llx >= gc->constants.width) || (lly >= gc->constants.height)) {
llx = lly = urx = ury = 0;
} else {
if (llx < 0) llx = 0;
if (lly < 0) lly = 0;
if (urx > gc->constants.width) urx = gc->constants.width;
if (ury > gc->constants.height) ury = gc->constants.height;
}
} else {
llx = 0;
lly = 0;
urx = gc->constants.width;
ury = gc->constants.height;
}
gc->transform.clipX0 = llx + gc->constants.viewportXAdjust;
gc->transform.clipX1 = urx + gc->constants.viewportXAdjust;
if (gc->constants.yInverted) {
gc->transform.clipY0 = (gc->constants.height - ury) +
gc->constants.viewportYAdjust;
gc->transform.clipY1 = (gc->constants.height - lly) +
gc->constants.viewportYAdjust;
} else {
gc->transform.clipY0 = lly + gc->constants.viewportYAdjust;
gc->transform.clipY1 = ury + gc->constants.viewportYAdjust;
}
}
#endif // NT_DEADCODE_CLIPBOX
/************************************************************************/
/*
** Note: These xform routines must allow for the case where the result
** vector is equal to the source vector.
*/
#ifndef __GL_ASM_XFORM1
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has y=0, z=0 and w=1.
*/
void FASTCALL __glXForm1(__GLcoord *res, const __GLfloat v[1], const __GLmatrix *m)
{
__GLfloat x = v[0];
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + m->matrix[3][1];
res->z = x*m->matrix[0][2] + m->matrix[3][2];
res->w = x*m->matrix[0][3] + m->matrix[3][3];
}
#endif /* !__GL_ASM_XFORM1 */
#ifndef __GL_ASM_XFORM2
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has z=0 and w=1
*/
void FASTCALL __glXForm2(__GLcoord *res, const __GLfloat v[2], const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + m->matrix[3][2];
res->w = x*m->matrix[0][3] + y*m->matrix[1][3] + m->matrix[3][3];
}
#endif /* !__GL_ASM_XFORM2 */
#ifndef __GL_ASM_XFORM3
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has w=1.
*/
void FASTCALL __glXForm3(__GLcoord *res, const __GLfloat v[3], const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + z*m->matrix[2][0]
+ m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + z*m->matrix[2][1]
+ m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + z*m->matrix[2][2]
+ m->matrix[3][2];
res->w = x*m->matrix[0][3] + y*m->matrix[1][3] + z*m->matrix[2][3]
+ m->matrix[3][3];
}
#endif /* !__GL_ASM_XFORM3 */
#ifndef __GL_ASM_XFORM4
/*
** Full 4x4 transformation.
*/
void FASTCALL __glXForm4(__GLcoord *res, const __GLfloat v[4], const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
__GLfloat w = v[3];
if (w == ((__GLfloat) 1.0)) {
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + z*m->matrix[2][0]
+ m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + z*m->matrix[2][1]
+ m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + z*m->matrix[2][2]
+ m->matrix[3][2];
res->w = x*m->matrix[0][3] + y*m->matrix[1][3] + z*m->matrix[2][3]
+ m->matrix[3][3];
} else {
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + z*m->matrix[2][0]
+ w*m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + z*m->matrix[2][1]
+ w*m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + z*m->matrix[2][2]
+ w*m->matrix[3][2];
res->w = x*m->matrix[0][3] + y*m->matrix[1][3] + z*m->matrix[2][3]
+ w*m->matrix[3][3];
}
}
#endif /* !__GL_ASM_XFORM4 */
/************************************************************************/
#ifndef __GL_ASM_XFORM1_W
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has y=0, z=0 and w=1. The w column of the matrix is [0 0 0 1].
*/
void FASTCALL __glXForm1_W(__GLcoord *res, const __GLfloat v[1], const __GLmatrix *m)
{
__GLfloat x = v[0];
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + m->matrix[3][1];
res->z = x*m->matrix[0][2] + m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM1_W */
#ifndef __GL_ASM_XFORM2_W
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has z=0 and w=1. The w column of the matrix is [0 0 0 1].
*/
void FASTCALL __glXForm2_W(__GLcoord *res, const __GLfloat v[2], const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM2_W */
#ifndef __GL_ASM_XFORM3_W
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has w=1. The w column of the matrix is [0 0 0 1].
*/
void FASTCALL __glXForm3_W(__GLcoord *res, const __GLfloat v[3], const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + z*m->matrix[2][0]
+ m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + z*m->matrix[2][1]
+ m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + z*m->matrix[2][2]
+ m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM3_W */
#ifndef __GL_ASM_XFORM4_W
/*
** Full 4x4 transformation. The w column of the matrix is [0 0 0 1].
*/
void FASTCALL __glXForm4_W(__GLcoord *res, const __GLfloat v[4], const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
__GLfloat w = v[3];
if (w == ((__GLfloat) 1.0)) {
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + z*m->matrix[2][0]
+ m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + z*m->matrix[2][1]
+ m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + z*m->matrix[2][2]
+ m->matrix[3][2];
} else {
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + z*m->matrix[2][0]
+ w*m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + z*m->matrix[2][1]
+ w*m->matrix[3][1];
res->z = x*m->matrix[0][2] + y*m->matrix[1][2] + z*m->matrix[2][2]
+ w*m->matrix[3][2];
}
res->w = w;
}
#endif /* !__GL_ASM_XFORM4_W */
#ifndef __GL_ASM_XFORM1_2DW
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has y=0, z=0 and w=1.
**
** The matrix looks like:
** | . . 0 0 |
** | . . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm1_2DW(__GLcoord *res, const __GLfloat v[1], const __GLmatrix *m)
{
__GLfloat x = v[0];
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + m->matrix[3][1];
res->z = m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM1_2DW */
#ifndef __GL_ASM_XFORM2_2DW
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has z=0 and w=1.
**
** The matrix looks like:
** | . . 0 0 |
** | . . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm2_2DW(__GLcoord *res, const __GLfloat v[2],
const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + m->matrix[3][1];
res->z = m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM2_2DW */
#ifndef __GL_ASM_XFORM3_2DW
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has w=1.
**
** The matrix looks like:
** | . . 0 0 |
** | . . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm3_2DW(__GLcoord *res, const __GLfloat v[3],
const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + m->matrix[3][1];
res->z = z*m->matrix[2][2] + m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM3_2DW */
#ifndef __GL_ASM_XFORM4_2DW
/*
** Full 4x4 transformation.
**
** The matrix looks like:
** | . . 0 0 |
** | . . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm4_2DW(__GLcoord *res, const __GLfloat v[4],
const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
__GLfloat w = v[3];
if (w == ((__GLfloat) 1.0)) {
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + m->matrix[3][1];
res->z = z*m->matrix[2][2] + m->matrix[3][2];
} else {
res->x = x*m->matrix[0][0] + y*m->matrix[1][0] + w*m->matrix[3][0];
res->y = x*m->matrix[0][1] + y*m->matrix[1][1] + w*m->matrix[3][1];
res->z = z*m->matrix[2][2] + w*m->matrix[3][2];
}
res->w = w;
}
#endif /* !__GL_ASM_XFORM4_2DW */
#ifndef __GL_ASM_XFORM1_2DNRW
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has y=0, z=0 and w=1.
**
** The matrix looks like:
** | . 0 0 0 |
** | 0 . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm1_2DNRW(__GLcoord *res, const __GLfloat v[1], const __GLmatrix *m)
{
__GLfloat x = v[0];
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = m->matrix[3][1];
res->z = m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM1_2DNRW */
#ifndef __GL_ASM_XFORM2_2DNRW
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has z=0 and w=1.
**
** The matrix looks like:
** | . 0 0 0 |
** | 0 . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm2_2DNRW(__GLcoord *res, const __GLfloat v[2],
const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = y*m->matrix[1][1] + m->matrix[3][1];
res->z = m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM2_2DNRW */
#ifndef __GL_ASM_XFORM3_2DNRW
/*
** Avoid some transformation computations by knowing that the incoming
** vertex has w=1.
**
** The matrix looks like:
** | . 0 0 0 |
** | 0 . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm3_2DNRW(__GLcoord *res, const __GLfloat v[3],
const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = y*m->matrix[1][1] + m->matrix[3][1];
res->z = z*m->matrix[2][2] + m->matrix[3][2];
res->w = ((__GLfloat) 1.0);
}
#endif /* !__GL_ASM_XFORM3_2DNRW */
#ifndef __GL_ASM_XFORM4_2DNRW
/*
** Full 4x4 transformation.
**
** The matrix looks like:
** | . 0 0 0 |
** | 0 . 0 0 |
** | 0 0 . 0 |
** | . . . 1 |
*/
void FASTCALL __glXForm4_2DNRW(__GLcoord *res, const __GLfloat v[4],
const __GLmatrix *m)
{
__GLfloat x = v[0];
__GLfloat y = v[1];
__GLfloat z = v[2];
__GLfloat w = v[3];
if (w == ((__GLfloat) 1.0)) {
res->x = x*m->matrix[0][0] + m->matrix[3][0];
res->y = y*m->matrix[1][1] + m->matrix[3][1];
res->z = z*m->matrix[2][2] + m->matrix[3][2];
} else {
res->x = x*m->matrix[0][0] + w*m->matrix[3][0];
res->y = y*m->matrix[1][1] + w*m->matrix[3][1];
res->z = z*m->matrix[2][2] + w*m->matrix[3][2];
}
res->w = w;
}
#endif /* !__GL_ASM_XFORM4_2DNRW */
/************************************************************************/
#ifdef SGI
// Not used!
/*
** Recompute the cached 2D matrix from the current mvp matrix and the viewport
** transformation. This allows us to transform object coordinates directly
** to window coordinates.
*/
static void FASTCALL ReCompute2DMatrix(__GLcontext *gc, __GLmatrix *mvp)
{
__GLviewport *vp;
__GLmatrix *m;
if (mvp->matrixType >= __GL_MT_IS2D) {
m = &(gc->transform.matrix2D);
vp = &(gc->state.viewport);
m->matrix[0][0] = mvp->matrix[0][0] * vp->xScale;
m->matrix[0][1] = mvp->matrix[0][1] * vp->yScale;
m->matrix[1][0] = mvp->matrix[1][0] * vp->xScale;
m->matrix[1][1] = mvp->matrix[1][1] * vp->yScale;
m->matrix[2][2] = mvp->matrix[2][2];
m->matrix[3][0] = mvp->matrix[3][0] * vp->xScale + vp->xCenter;
m->matrix[3][1] = mvp->matrix[3][1] * vp->yScale + vp->yCenter;
m->matrix[3][2] = mvp->matrix[3][2];
m->matrix[3][3] = (__GLfloat) 1.0;
m->matrixType = mvp->matrixType;
}
}
#endif // SGI
/*
** A special picker for the mvp matrix which picks the mvp matrix, then
** calls the vertex picker, because the vertex picker depends upon the mvp
** matrix.
*/
void FASTCALL __glGenericPickMvpMatrixProcs(__GLcontext *gc, __GLmatrix *m)
{
#ifdef SGI
__glPickMatrixType(m,
&gc->transform.modelView->matrix,
(__GLmatrix *) &gc->transform.projection->matrix);
// not used!
ReCompute2DMatrix(gc, m);
#endif // SGI
__glGenericPickMatrixProcs(gc, m);
(*gc->procs.pickVertexProcs)(gc);
}
void FASTCALL __glGenericPickMatrixProcs(__GLcontext *gc, __GLmatrix *m)
{
switch(m->matrixType) {
case __GL_MT_GENERAL:
m->xf1 = __glXForm1;
m->xf2 = __glXForm2;
m->xf3 = __glXForm3;
m->xf4 = __glXForm4;
break;
case __GL_MT_W0001:
m->xf1 = __glXForm1_W;
m->xf2 = __glXForm2_W;
m->xf3 = __glXForm3_W;
m->xf4 = __glXForm4_W;
break;
case __GL_MT_IS2D:
m->xf1 = __glXForm1_2DW;
m->xf2 = __glXForm2_2DW;
m->xf3 = __glXForm3_2DW;
m->xf4 = __glXForm4_2DW;
break;
case __GL_MT_IS2DNR:
#ifdef NT_DEADCODE_MATRIX
case __GL_MT_IS2DNRSC:
#endif // NT_DEADCODE_MATRIX
case __GL_MT_IDENTITY: /* probably never hit */
// Update __glGenericPickIdentityMatrixProcs if we change __GL_MT_IDENTITY
// procs!
m->xf1 = __glXForm1_2DNRW;
m->xf2 = __glXForm2_2DNRW;
m->xf3 = __glXForm3_2DNRW;
m->xf4 = __glXForm4_2DNRW;
break;
}
}
#ifdef SGI
// This differs from the normal matrix pick routine by always
// setting xf4 to the general case and then picking a specific xf3
void FASTCALL __glGenericPickInvTransposeProcs(__GLcontext *gc, __GLmatrix *m)
{
m->xf4 = __glXForm4;
switch(m->matrixType) {
case __GL_MT_GENERAL:
m->xf3 = __glXForm3; // was __glXForm4!
break;
case __GL_MT_W0001:
m->xf3 = __glXForm3_W;
break;
case __GL_MT_IS2D:
m->xf3 = __glXForm3_2DW;
break;
case __GL_MT_IS2DNR:
#ifdef NT_DEADCODE_MATRIX
case __GL_MT_IS2DNRSC:
#endif // NT_DEADCODE_MATRIX
case __GL_MT_IDENTITY: /* probably never hit */
m->xf3 = __glXForm3_2DNRW;
break;
}
}
#endif