diff options
Diffstat (limited to 'mesalib/src/mesa/main/matrix.c')
| -rw-r--r-- | mesalib/src/mesa/main/matrix.c | 1578 |
1 files changed, 789 insertions, 789 deletions
diff --git a/mesalib/src/mesa/main/matrix.c b/mesalib/src/mesa/main/matrix.c index 2579b7384..f479a22b0 100644 --- a/mesalib/src/mesa/main/matrix.c +++ b/mesalib/src/mesa/main/matrix.c @@ -1,789 +1,789 @@ -/*
- * Mesa 3-D graphics library
- * Version: 7.5
- *
- * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
- * Copyright (C) 2009 VMware, Inc. 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
- * BRIAN PAUL 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 matrix.c
- * Matrix operations.
- *
- * \note
- * -# 4x4 transformation matrices are stored in memory in column major order.
- * -# Points/vertices are to be thought of as column vectors.
- * -# Transformation of a point p by a matrix M is: p' = M * p
- */
-
-
-#include "glheader.h"
-#include "imports.h"
-#include "context.h"
-#include "enums.h"
-#include "macros.h"
-#include "mfeatures.h"
-#include "matrix.h"
-#include "mtypes.h"
-#include "math/m_matrix.h"
-
-
-/**
- * Apply a perspective 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 glFrustum().
- *
- * Flushes vertices and validates parameters. Calls _math_matrix_frustum() with
- * the top matrix of the current matrix stack and sets
- * __struct gl_contextRec::NewState.
- */
-void GLAPIENTRY
-_mesa_Frustum( GLdouble left, GLdouble right,
- GLdouble bottom, GLdouble top,
- GLdouble nearval, GLdouble farval )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
- if (nearval <= 0.0 ||
- farval <= 0.0 ||
- nearval == farval ||
- left == right ||
- top == bottom)
- {
- _mesa_error( ctx, GL_INVALID_VALUE, "glFrustum" );
- return;
- }
-
- _math_matrix_frustum( ctx->CurrentStack->Top,
- (GLfloat) left, (GLfloat) right,
- (GLfloat) bottom, (GLfloat) top,
- (GLfloat) nearval, (GLfloat) farval );
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
-}
-
-
-/**
- * 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
- * __struct gl_contextRec::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 the current matrix stack.
- *
- * \param mode matrix stack.
- *
- * \sa glMatrixMode().
- *
- * Flushes the vertices, validates the parameter and updates
- * __struct gl_contextRec::CurrentStack and gl_transform_attrib::MatrixMode
- * with the specified matrix stack.
- */
-void GLAPIENTRY
-_mesa_MatrixMode( GLenum mode )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->Transform.MatrixMode == mode && mode != GL_TEXTURE)
- return;
- FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
-
- switch (mode) {
- case GL_MODELVIEW:
- ctx->CurrentStack = &ctx->ModelviewMatrixStack;
- break;
- case GL_PROJECTION:
- ctx->CurrentStack = &ctx->ProjectionMatrixStack;
- break;
- case GL_TEXTURE:
- /* This error check is disabled because if we're called from
- * glPopAttrib() when the active texture unit is >= MaxTextureCoordUnits
- * we'll generate an unexpected error.
- * From the GL_ARB_vertex_shader spec it sounds like we should instead
- * do error checking in other places when we actually try to access
- * texture matrices beyond MaxTextureCoordUnits.
- */
-#if 0
- if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glMatrixMode(invalid tex unit %d)",
- ctx->Texture.CurrentUnit);
- return;
- }
-#endif
- ASSERT(ctx->Texture.CurrentUnit < Elements(ctx->TextureMatrixStack));
- ctx->CurrentStack = &ctx->TextureMatrixStack[ctx->Texture.CurrentUnit];
- break;
- case GL_MATRIX0_NV:
- case GL_MATRIX1_NV:
- case GL_MATRIX2_NV:
- case GL_MATRIX3_NV:
- case GL_MATRIX4_NV:
- case GL_MATRIX5_NV:
- case GL_MATRIX6_NV:
- case GL_MATRIX7_NV:
- if (ctx->Extensions.NV_vertex_program) {
- ctx->CurrentStack = &ctx->ProgramMatrixStack[mode - GL_MATRIX0_NV];
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
- return;
- }
- break;
- case GL_MATRIX0_ARB:
- case GL_MATRIX1_ARB:
- case GL_MATRIX2_ARB:
- case GL_MATRIX3_ARB:
- case GL_MATRIX4_ARB:
- case GL_MATRIX5_ARB:
- case GL_MATRIX6_ARB:
- case GL_MATRIX7_ARB:
- if (ctx->Extensions.ARB_vertex_program ||
- ctx->Extensions.ARB_fragment_program) {
- const GLuint m = mode - GL_MATRIX0_ARB;
- if (m > ctx->Const.MaxProgramMatrices) {
- _mesa_error(ctx, GL_INVALID_ENUM,
- "glMatrixMode(GL_MATRIX%d_ARB)", m);
- return;
- }
- ctx->CurrentStack = &ctx->ProgramMatrixStack[m];
- }
- else {
- _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
- return;
- }
- break;
- default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
- return;
- }
-
- ctx->Transform.MatrixMode = mode;
-}
-
-
-/**
- * Push the current matrix stack.
- *
- * \sa glPushMatrix().
- *
- * Verifies the current matrix stack is not full, and duplicates the top-most
- * matrix in the stack.
- * Marks __struct gl_contextRec::NewState with the stack dirty flag.
- */
-void GLAPIENTRY
-_mesa_PushMatrix( void )
-{
- GET_CURRENT_CONTEXT(ctx);
- struct gl_matrix_stack *stack = ctx->CurrentStack;
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (MESA_VERBOSE&VERBOSE_API)
- _mesa_debug(ctx, "glPushMatrix %s\n",
- _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
-
- if (stack->Depth + 1 >= stack->MaxDepth) {
- if (ctx->Transform.MatrixMode == GL_TEXTURE) {
- _mesa_error(ctx, GL_STACK_OVERFLOW,
- "glPushMatrix(mode=GL_TEXTURE, unit=%d)",
- ctx->Texture.CurrentUnit);
- }
- else {
- _mesa_error(ctx, GL_STACK_OVERFLOW, "glPushMatrix(mode=%s)",
- _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
- }
- return;
- }
- _math_matrix_copy( &stack->Stack[stack->Depth + 1],
- &stack->Stack[stack->Depth] );
- stack->Depth++;
- stack->Top = &(stack->Stack[stack->Depth]);
- ctx->NewState |= stack->DirtyFlag;
-}
-
-
-/**
- * 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 __struct gl_contextRec::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;
-}
-
-
-/**
- * Replace the current matrix with the identity matrix.
- *
- * \sa glLoadIdentity().
- *
- * Flushes the vertices and calls _math_matrix_set_identity() with the
- * top-most matrix in the current stack.
- * Marks __struct gl_contextRec::NewState with the stack dirty flag.
- */
-void GLAPIENTRY
-_mesa_LoadIdentity( void )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glLoadIdentity()\n");
-
- _math_matrix_set_identity( ctx->CurrentStack->Top );
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
-}
-
-
-/**
- * Replace the current matrix with a given matrix.
- *
- * \param m matrix.
- *
- * \sa glLoadMatrixf().
- *
- * Flushes the vertices and calls _math_matrix_loadf() with the top-most
- * matrix in the current stack and the given matrix.
- * Marks __struct gl_contextRec::NewState with the dirty stack flag.
- */
-void GLAPIENTRY
-_mesa_LoadMatrixf( const GLfloat *m )
-{
- GET_CURRENT_CONTEXT(ctx);
- if (!m) return;
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx,
- "glLoadMatrix(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n",
- m[0], m[4], m[8], m[12],
- m[1], m[5], m[9], m[13],
- m[2], m[6], m[10], m[14],
- m[3], m[7], m[11], m[15]);
-
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- _math_matrix_loadf( ctx->CurrentStack->Top, m );
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
-}
-
-
-/**
- * Multiply the current matrix with a given matrix.
- *
- * \param m matrix.
- *
- * \sa glMultMatrixf().
- *
- * Flushes the vertices and calls _math_matrix_mul_floats() with the top-most
- * matrix in the current stack and the given matrix. Marks
- * __struct gl_contextRec::NewState with the dirty stack flag.
- */
-void GLAPIENTRY
-_mesa_MultMatrixf( const GLfloat *m )
-{
- GET_CURRENT_CONTEXT(ctx);
- if (!m) return;
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx,
- "glMultMatrix(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n",
- m[0], m[4], m[8], m[12],
- m[1], m[5], m[9], m[13],
- m[2], m[6], m[10], m[14],
- m[3], m[7], m[11], m[15]);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- _math_matrix_mul_floats( ctx->CurrentStack->Top, m );
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
-}
-
-
-/**
- * Multiply the current matrix with a rotation matrix.
- *
- * \param angle angle of rotation, in degrees.
- * \param x rotation vector x coordinate.
- * \param y rotation vector y coordinate.
- * \param z rotation vector z coordinate.
- *
- * \sa glRotatef().
- *
- * Flushes the vertices and calls _math_matrix_rotate() with the top-most
- * matrix in the current stack and the given parameters. Marks
- * __struct gl_contextRec::NewState with the dirty stack flag.
- */
-void GLAPIENTRY
-_mesa_Rotatef( GLfloat angle, GLfloat x, GLfloat y, GLfloat z )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- if (angle != 0.0F) {
- _math_matrix_rotate( ctx->CurrentStack->Top, angle, x, y, z);
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
- }
-}
-
-
-/**
- * Multiply the current matrix with a general scaling matrix.
- *
- * \param x x axis scale factor.
- * \param y y axis scale factor.
- * \param z z axis scale factor.
- *
- * \sa glScalef().
- *
- * Flushes the vertices and calls _math_matrix_scale() with the top-most
- * matrix in the current stack and the given parameters. Marks
- * __struct gl_contextRec::NewState with the dirty stack flag.
- */
-void GLAPIENTRY
-_mesa_Scalef( GLfloat x, GLfloat y, GLfloat z )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- _math_matrix_scale( ctx->CurrentStack->Top, x, y, z);
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
-}
-
-
-/**
- * Multiply the current matrix with a translation matrix.
- *
- * \param x translation vector x coordinate.
- * \param y translation vector y coordinate.
- * \param z translation vector z coordinate.
- *
- * \sa glTranslatef().
- *
- * Flushes the vertices and calls _math_matrix_translate() with the top-most
- * matrix in the current stack and the given parameters. Marks
- * __struct gl_contextRec::NewState with the dirty stack flag.
- */
-void GLAPIENTRY
-_mesa_Translatef( GLfloat x, GLfloat y, GLfloat z )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- _math_matrix_translate( ctx->CurrentStack->Top, x, y, z);
- ctx->NewState |= ctx->CurrentStack->DirtyFlag;
-}
-
-
-#if _HAVE_FULL_GL
-void GLAPIENTRY
-_mesa_LoadMatrixd( const GLdouble *m )
-{
- GLint i;
- GLfloat f[16];
- if (!m) return;
- for (i = 0; i < 16; i++)
- f[i] = (GLfloat) m[i];
- _mesa_LoadMatrixf(f);
-}
-
-void GLAPIENTRY
-_mesa_MultMatrixd( const GLdouble *m )
-{
- GLint i;
- GLfloat f[16];
- if (!m) return;
- for (i = 0; i < 16; i++)
- f[i] = (GLfloat) m[i];
- _mesa_MultMatrixf( f );
-}
-
-
-void GLAPIENTRY
-_mesa_Rotated( GLdouble angle, GLdouble x, GLdouble y, GLdouble z )
-{
- _mesa_Rotatef((GLfloat) angle, (GLfloat) x, (GLfloat) y, (GLfloat) z);
-}
-
-
-void GLAPIENTRY
-_mesa_Scaled( GLdouble x, GLdouble y, GLdouble z )
-{
- _mesa_Scalef((GLfloat) x, (GLfloat) y, (GLfloat) z);
-}
-
-
-void GLAPIENTRY
-_mesa_Translated( GLdouble x, GLdouble y, GLdouble z )
-{
- _mesa_Translatef((GLfloat) x, (GLfloat) y, (GLfloat) z);
-}
-#endif
-
-
-#if _HAVE_FULL_GL
-void GLAPIENTRY
-_mesa_LoadTransposeMatrixfARB( const GLfloat *m )
-{
- GLfloat tm[16];
- if (!m) return;
- _math_transposef(tm, m);
- _mesa_LoadMatrixf(tm);
-}
-
-
-void GLAPIENTRY
-_mesa_LoadTransposeMatrixdARB( const GLdouble *m )
-{
- GLfloat tm[16];
- if (!m) return;
- _math_transposefd(tm, m);
- _mesa_LoadMatrixf(tm);
-}
-
-
-void GLAPIENTRY
-_mesa_MultTransposeMatrixfARB( const GLfloat *m )
-{
- GLfloat tm[16];
- if (!m) return;
- _math_transposef(tm, m);
- _mesa_MultMatrixf(tm);
-}
-
-
-void GLAPIENTRY
-_mesa_MultTransposeMatrixdARB( const GLdouble *m )
-{
- GLfloat tm[16];
- if (!m) return;
- _math_transposefd(tm, m);
- _mesa_MultMatrixf(tm);
-}
-#endif
-
-
-
-/**********************************************************************/
-/** \name State management */
-/*@{*/
-
-
-/**
- * Update the projection matrix stack.
- *
- * \param ctx GL context.
- *
- * Calls _math_matrix_analyse() with the top-matrix of the projection matrix
- * stack, and recomputes user clip positions if necessary.
- *
- * \note This routine references __struct gl_contextRec::Tranform attribute
- * values to compute userclip positions in clip space, but is only called on
- * _NEW_PROJECTION. The _mesa_ClipPlane() function keeps these values up to
- * date across changes to the __struct gl_contextRec::Transform attributes.
- */
-static void
-update_projection( struct gl_context *ctx )
-{
- _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
-
-#if FEATURE_userclip
- /* Recompute clip plane positions in clipspace. This is also done
- * in _mesa_ClipPlane().
- */
- if (ctx->Transform.ClipPlanesEnabled) {
- GLuint p;
- for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
- if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- _mesa_transform_vector( ctx->Transform._ClipUserPlane[p],
- ctx->Transform.EyeUserPlane[p],
- ctx->ProjectionMatrixStack.Top->inv );
- }
- }
- }
-#endif
-}
-
-
-/**
- * Calculate the combined modelview-projection matrix.
- *
- * \param ctx GL context.
- *
- * Multiplies the top matrices of the projection and model view stacks into
- * __struct gl_contextRec::_ModelProjectMatrix via _math_matrix_mul_matrix()
- * and analyzes the resulting matrix via _math_matrix_analyse().
- */
-static void
-calculate_model_project_matrix( struct gl_context *ctx )
-{
- _math_matrix_mul_matrix( &ctx->_ModelProjectMatrix,
- ctx->ProjectionMatrixStack.Top,
- ctx->ModelviewMatrixStack.Top );
-
- _math_matrix_analyse( &ctx->_ModelProjectMatrix );
-}
-
-
-/**
- * Updates the combined modelview-projection matrix.
- *
- * \param ctx GL context.
- * \param new_state new state bit mask.
- *
- * If there is a new model view matrix then analyzes it. If there is a new
- * projection matrix, updates it. Finally calls
- * calculate_model_project_matrix() to recalculate the modelview-projection
- * matrix.
- */
-void _mesa_update_modelview_project( struct gl_context *ctx, GLuint new_state )
-{
- if (new_state & _NEW_MODELVIEW) {
- _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
-
- /* Bring cull position up to date.
- */
- TRANSFORM_POINT3( ctx->Transform.CullObjPos,
- ctx->ModelviewMatrixStack.Top->inv,
- ctx->Transform.CullEyePos );
- }
-
-
- if (new_state & _NEW_PROJECTION)
- update_projection( ctx );
-
- /* Keep ModelviewProject up to date always to allow tnl
- * implementations that go model->clip even when eye is required.
- */
- calculate_model_project_matrix(ctx);
-}
-
-/*@}*/
-
-
-/**********************************************************************/
-/** Matrix stack initialization */
-/*@{*/
-
-
-/**
- * Initialize a matrix stack.
- *
- * \param stack matrix stack.
- * \param maxDepth maximum stack depth.
- * \param dirtyFlag dirty flag.
- *
- * Allocates an array of \p maxDepth elements for the matrix stack and calls
- * _math_matrix_ctr() and _math_matrix_alloc_inv() for each element to
- * initialize it.
- */
-static void
-init_matrix_stack( struct gl_matrix_stack *stack,
- GLuint maxDepth, GLuint dirtyFlag )
-{
- GLuint i;
-
- stack->Depth = 0;
- stack->MaxDepth = maxDepth;
- stack->DirtyFlag = dirtyFlag;
- /* The stack */
- stack->Stack = (GLmatrix *) CALLOC(maxDepth * sizeof(GLmatrix));
- for (i = 0; i < maxDepth; i++) {
- _math_matrix_ctr(&stack->Stack[i]);
- _math_matrix_alloc_inv(&stack->Stack[i]);
- }
- stack->Top = stack->Stack;
-}
-
-/**
- * Free matrix stack.
- *
- * \param stack matrix stack.
- *
- * Calls _math_matrix_dtr() for each element of the matrix stack and
- * frees the array.
- */
-static void
-free_matrix_stack( struct gl_matrix_stack *stack )
-{
- GLuint i;
- for (i = 0; i < stack->MaxDepth; i++) {
- _math_matrix_dtr(&stack->Stack[i]);
- }
- FREE(stack->Stack);
- stack->Stack = stack->Top = NULL;
-}
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name Initialization */
-/*@{*/
-
-
-/**
- * Initialize the context matrix data.
- *
- * \param ctx GL context.
- *
- * Initializes each of the matrix stacks and the combined modelview-projection
- * matrix.
- */
-void _mesa_init_matrix( struct gl_context * ctx )
-{
- GLint i;
-
- /* Initialize matrix stacks */
- init_matrix_stack(&ctx->ModelviewMatrixStack, MAX_MODELVIEW_STACK_DEPTH,
- _NEW_MODELVIEW);
- init_matrix_stack(&ctx->ProjectionMatrixStack, MAX_PROJECTION_STACK_DEPTH,
- _NEW_PROJECTION);
- for (i = 0; i < Elements(ctx->TextureMatrixStack); i++)
- init_matrix_stack(&ctx->TextureMatrixStack[i], MAX_TEXTURE_STACK_DEPTH,
- _NEW_TEXTURE_MATRIX);
- for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++)
- init_matrix_stack(&ctx->ProgramMatrixStack[i],
- MAX_PROGRAM_MATRIX_STACK_DEPTH, _NEW_TRACK_MATRIX);
- ctx->CurrentStack = &ctx->ModelviewMatrixStack;
-
- /* Init combined Modelview*Projection matrix */
- _math_matrix_ctr( &ctx->_ModelProjectMatrix );
-}
-
-
-/**
- * Free the context matrix data.
- *
- * \param ctx GL context.
- *
- * Frees each of the matrix stacks and the combined modelview-projection
- * matrix.
- */
-void _mesa_free_matrix_data( struct gl_context *ctx )
-{
- GLint i;
-
- free_matrix_stack(&ctx->ModelviewMatrixStack);
- free_matrix_stack(&ctx->ProjectionMatrixStack);
- for (i = 0; i < Elements(ctx->TextureMatrixStack); i++)
- free_matrix_stack(&ctx->TextureMatrixStack[i]);
- for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++)
- free_matrix_stack(&ctx->ProgramMatrixStack[i]);
- /* combined Modelview*Projection matrix */
- _math_matrix_dtr( &ctx->_ModelProjectMatrix );
-
-}
-
-
-/**
- * Initialize the context transform attribute group.
- *
- * \param ctx GL context.
- *
- * \todo Move this to a new file with other 'transform' routines.
- */
-void _mesa_init_transform( struct gl_context *ctx )
-{
- GLint i;
-
- /* Transformation group */
- ctx->Transform.MatrixMode = GL_MODELVIEW;
- ctx->Transform.Normalize = GL_FALSE;
- ctx->Transform.RescaleNormals = GL_FALSE;
- ctx->Transform.RasterPositionUnclipped = GL_FALSE;
- for (i=0;i<MAX_CLIP_PLANES;i++) {
- ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
- }
- ctx->Transform.ClipPlanesEnabled = 0;
-
- ASSIGN_4V( ctx->Transform.CullObjPos, 0.0, 0.0, 1.0, 0.0 );
- ASSIGN_4V( ctx->Transform.CullEyePos, 0.0, 0.0, 1.0, 0.0 );
-}
-
-
-/*@}*/
+/* + * Mesa 3-D graphics library + * Version: 7.5 + * + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * Copyright (C) 2009 VMware, Inc. 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 + * BRIAN PAUL 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 matrix.c + * Matrix operations. + * + * \note + * -# 4x4 transformation matrices are stored in memory in column major order. + * -# Points/vertices are to be thought of as column vectors. + * -# Transformation of a point p by a matrix M is: p' = M * p + */ + + +#include "glheader.h" +#include "imports.h" +#include "context.h" +#include "enums.h" +#include "macros.h" +#include "mfeatures.h" +#include "matrix.h" +#include "mtypes.h" +#include "math/m_matrix.h" + + +/** + * Apply a perspective 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 glFrustum(). + * + * Flushes vertices and validates parameters. Calls _math_matrix_frustum() with + * the top matrix of the current matrix stack and sets + * __struct gl_contextRec::NewState. + */ +void GLAPIENTRY +_mesa_Frustum( GLdouble left, GLdouble right, + GLdouble bottom, GLdouble top, + GLdouble nearval, GLdouble farval ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + if (nearval <= 0.0 || + farval <= 0.0 || + nearval == farval || + left == right || + top == bottom) + { + _mesa_error( ctx, GL_INVALID_VALUE, "glFrustum" ); + return; + } + + _math_matrix_frustum( ctx->CurrentStack->Top, + (GLfloat) left, (GLfloat) right, + (GLfloat) bottom, (GLfloat) top, + (GLfloat) nearval, (GLfloat) farval ); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; +} + + +/** + * 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 + * __struct gl_contextRec::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 the current matrix stack. + * + * \param mode matrix stack. + * + * \sa glMatrixMode(). + * + * Flushes the vertices, validates the parameter and updates + * __struct gl_contextRec::CurrentStack and gl_transform_attrib::MatrixMode + * with the specified matrix stack. + */ +void GLAPIENTRY +_mesa_MatrixMode( GLenum mode ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (ctx->Transform.MatrixMode == mode && mode != GL_TEXTURE) + return; + FLUSH_VERTICES(ctx, _NEW_TRANSFORM); + + switch (mode) { + case GL_MODELVIEW: + ctx->CurrentStack = &ctx->ModelviewMatrixStack; + break; + case GL_PROJECTION: + ctx->CurrentStack = &ctx->ProjectionMatrixStack; + break; + case GL_TEXTURE: + /* This error check is disabled because if we're called from + * glPopAttrib() when the active texture unit is >= MaxTextureCoordUnits + * we'll generate an unexpected error. + * From the GL_ARB_vertex_shader spec it sounds like we should instead + * do error checking in other places when we actually try to access + * texture matrices beyond MaxTextureCoordUnits. + */ +#if 0 + if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMatrixMode(invalid tex unit %d)", + ctx->Texture.CurrentUnit); + return; + } +#endif + ASSERT(ctx->Texture.CurrentUnit < Elements(ctx->TextureMatrixStack)); + ctx->CurrentStack = &ctx->TextureMatrixStack[ctx->Texture.CurrentUnit]; + break; + case GL_MATRIX0_NV: + case GL_MATRIX1_NV: + case GL_MATRIX2_NV: + case GL_MATRIX3_NV: + case GL_MATRIX4_NV: + case GL_MATRIX5_NV: + case GL_MATRIX6_NV: + case GL_MATRIX7_NV: + if (ctx->Extensions.NV_vertex_program) { + ctx->CurrentStack = &ctx->ProgramMatrixStack[mode - GL_MATRIX0_NV]; + } + else { + _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" ); + return; + } + break; + case GL_MATRIX0_ARB: + case GL_MATRIX1_ARB: + case GL_MATRIX2_ARB: + case GL_MATRIX3_ARB: + case GL_MATRIX4_ARB: + case GL_MATRIX5_ARB: + case GL_MATRIX6_ARB: + case GL_MATRIX7_ARB: + if (ctx->Extensions.ARB_vertex_program || + ctx->Extensions.ARB_fragment_program) { + const GLuint m = mode - GL_MATRIX0_ARB; + if (m > ctx->Const.MaxProgramMatrices) { + _mesa_error(ctx, GL_INVALID_ENUM, + "glMatrixMode(GL_MATRIX%d_ARB)", m); + return; + } + ctx->CurrentStack = &ctx->ProgramMatrixStack[m]; + } + else { + _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" ); + return; + } + break; + default: + _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" ); + return; + } + + ctx->Transform.MatrixMode = mode; +} + + +/** + * Push the current matrix stack. + * + * \sa glPushMatrix(). + * + * Verifies the current matrix stack is not full, and duplicates the top-most + * matrix in the stack. + * Marks __struct gl_contextRec::NewState with the stack dirty flag. + */ +void GLAPIENTRY +_mesa_PushMatrix( void ) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_matrix_stack *stack = ctx->CurrentStack; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (MESA_VERBOSE&VERBOSE_API) + _mesa_debug(ctx, "glPushMatrix %s\n", + _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode)); + + if (stack->Depth + 1 >= stack->MaxDepth) { + if (ctx->Transform.MatrixMode == GL_TEXTURE) { + _mesa_error(ctx, GL_STACK_OVERFLOW, + "glPushMatrix(mode=GL_TEXTURE, unit=%d)", + ctx->Texture.CurrentUnit); + } + else { + _mesa_error(ctx, GL_STACK_OVERFLOW, "glPushMatrix(mode=%s)", + _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode)); + } + return; + } + _math_matrix_copy( &stack->Stack[stack->Depth + 1], + &stack->Stack[stack->Depth] ); + stack->Depth++; + stack->Top = &(stack->Stack[stack->Depth]); + ctx->NewState |= stack->DirtyFlag; +} + + +/** + * 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 __struct gl_contextRec::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; +} + + +/** + * Replace the current matrix with the identity matrix. + * + * \sa glLoadIdentity(). + * + * Flushes the vertices and calls _math_matrix_set_identity() with the + * top-most matrix in the current stack. + * Marks __struct gl_contextRec::NewState with the stack dirty flag. + */ +void GLAPIENTRY +_mesa_LoadIdentity( void ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, "glLoadIdentity()\n"); + + _math_matrix_set_identity( ctx->CurrentStack->Top ); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; +} + + +/** + * Replace the current matrix with a given matrix. + * + * \param m matrix. + * + * \sa glLoadMatrixf(). + * + * Flushes the vertices and calls _math_matrix_loadf() with the top-most + * matrix in the current stack and the given matrix. + * Marks __struct gl_contextRec::NewState with the dirty stack flag. + */ +void GLAPIENTRY +_mesa_LoadMatrixf( const GLfloat *m ) +{ + GET_CURRENT_CONTEXT(ctx); + if (!m) return; + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, + "glLoadMatrix(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n", + m[0], m[4], m[8], m[12], + m[1], m[5], m[9], m[13], + m[2], m[6], m[10], m[14], + m[3], m[7], m[11], m[15]); + + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + _math_matrix_loadf( ctx->CurrentStack->Top, m ); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; +} + + +/** + * Multiply the current matrix with a given matrix. + * + * \param m matrix. + * + * \sa glMultMatrixf(). + * + * Flushes the vertices and calls _math_matrix_mul_floats() with the top-most + * matrix in the current stack and the given matrix. Marks + * __struct gl_contextRec::NewState with the dirty stack flag. + */ +void GLAPIENTRY +_mesa_MultMatrixf( const GLfloat *m ) +{ + GET_CURRENT_CONTEXT(ctx); + if (!m) return; + if (MESA_VERBOSE & VERBOSE_API) + _mesa_debug(ctx, + "glMultMatrix(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n", + m[0], m[4], m[8], m[12], + m[1], m[5], m[9], m[13], + m[2], m[6], m[10], m[14], + m[3], m[7], m[11], m[15]); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + _math_matrix_mul_floats( ctx->CurrentStack->Top, m ); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; +} + + +/** + * Multiply the current matrix with a rotation matrix. + * + * \param angle angle of rotation, in degrees. + * \param x rotation vector x coordinate. + * \param y rotation vector y coordinate. + * \param z rotation vector z coordinate. + * + * \sa glRotatef(). + * + * Flushes the vertices and calls _math_matrix_rotate() with the top-most + * matrix in the current stack and the given parameters. Marks + * __struct gl_contextRec::NewState with the dirty stack flag. + */ +void GLAPIENTRY +_mesa_Rotatef( GLfloat angle, GLfloat x, GLfloat y, GLfloat z ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + if (angle != 0.0F) { + _math_matrix_rotate( ctx->CurrentStack->Top, angle, x, y, z); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; + } +} + + +/** + * Multiply the current matrix with a general scaling matrix. + * + * \param x x axis scale factor. + * \param y y axis scale factor. + * \param z z axis scale factor. + * + * \sa glScalef(). + * + * Flushes the vertices and calls _math_matrix_scale() with the top-most + * matrix in the current stack and the given parameters. Marks + * __struct gl_contextRec::NewState with the dirty stack flag. + */ +void GLAPIENTRY +_mesa_Scalef( GLfloat x, GLfloat y, GLfloat z ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + _math_matrix_scale( ctx->CurrentStack->Top, x, y, z); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; +} + + +/** + * Multiply the current matrix with a translation matrix. + * + * \param x translation vector x coordinate. + * \param y translation vector y coordinate. + * \param z translation vector z coordinate. + * + * \sa glTranslatef(). + * + * Flushes the vertices and calls _math_matrix_translate() with the top-most + * matrix in the current stack and the given parameters. Marks + * __struct gl_contextRec::NewState with the dirty stack flag. + */ +void GLAPIENTRY +_mesa_Translatef( GLfloat x, GLfloat y, GLfloat z ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + _math_matrix_translate( ctx->CurrentStack->Top, x, y, z); + ctx->NewState |= ctx->CurrentStack->DirtyFlag; +} + + +#if _HAVE_FULL_GL +void GLAPIENTRY +_mesa_LoadMatrixd( const GLdouble *m ) +{ + GLint i; + GLfloat f[16]; + if (!m) return; + for (i = 0; i < 16; i++) + f[i] = (GLfloat) m[i]; + _mesa_LoadMatrixf(f); +} + +void GLAPIENTRY +_mesa_MultMatrixd( const GLdouble *m ) +{ + GLint i; + GLfloat f[16]; + if (!m) return; + for (i = 0; i < 16; i++) + f[i] = (GLfloat) m[i]; + _mesa_MultMatrixf( f ); +} + + +void GLAPIENTRY +_mesa_Rotated( GLdouble angle, GLdouble x, GLdouble y, GLdouble z ) +{ + _mesa_Rotatef((GLfloat) angle, (GLfloat) x, (GLfloat) y, (GLfloat) z); +} + + +void GLAPIENTRY +_mesa_Scaled( GLdouble x, GLdouble y, GLdouble z ) +{ + _mesa_Scalef((GLfloat) x, (GLfloat) y, (GLfloat) z); +} + + +void GLAPIENTRY +_mesa_Translated( GLdouble x, GLdouble y, GLdouble z ) +{ + _mesa_Translatef((GLfloat) x, (GLfloat) y, (GLfloat) z); +} +#endif + + +#if _HAVE_FULL_GL +void GLAPIENTRY +_mesa_LoadTransposeMatrixfARB( const GLfloat *m ) +{ + GLfloat tm[16]; + if (!m) return; + _math_transposef(tm, m); + _mesa_LoadMatrixf(tm); +} + + +void GLAPIENTRY +_mesa_LoadTransposeMatrixdARB( const GLdouble *m ) +{ + GLfloat tm[16]; + if (!m) return; + _math_transposefd(tm, m); + _mesa_LoadMatrixf(tm); +} + + +void GLAPIENTRY +_mesa_MultTransposeMatrixfARB( const GLfloat *m ) +{ + GLfloat tm[16]; + if (!m) return; + _math_transposef(tm, m); + _mesa_MultMatrixf(tm); +} + + +void GLAPIENTRY +_mesa_MultTransposeMatrixdARB( const GLdouble *m ) +{ + GLfloat tm[16]; + if (!m) return; + _math_transposefd(tm, m); + _mesa_MultMatrixf(tm); +} +#endif + + + +/**********************************************************************/ +/** \name State management */ +/*@{*/ + + +/** + * Update the projection matrix stack. + * + * \param ctx GL context. + * + * Calls _math_matrix_analyse() with the top-matrix of the projection matrix + * stack, and recomputes user clip positions if necessary. + * + * \note This routine references __struct gl_contextRec::Tranform attribute + * values to compute userclip positions in clip space, but is only called on + * _NEW_PROJECTION. The _mesa_ClipPlane() function keeps these values up to + * date across changes to the __struct gl_contextRec::Transform attributes. + */ +static void +update_projection( struct gl_context *ctx ) +{ + _math_matrix_analyse( ctx->ProjectionMatrixStack.Top ); + +#if FEATURE_userclip + /* Recompute clip plane positions in clipspace. This is also done + * in _mesa_ClipPlane(). + */ + if (ctx->Transform.ClipPlanesEnabled) { + GLuint p; + for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { + if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { + _mesa_transform_vector( ctx->Transform._ClipUserPlane[p], + ctx->Transform.EyeUserPlane[p], + ctx->ProjectionMatrixStack.Top->inv ); + } + } + } +#endif +} + + +/** + * Calculate the combined modelview-projection matrix. + * + * \param ctx GL context. + * + * Multiplies the top matrices of the projection and model view stacks into + * __struct gl_contextRec::_ModelProjectMatrix via _math_matrix_mul_matrix() + * and analyzes the resulting matrix via _math_matrix_analyse(). + */ +static void +calculate_model_project_matrix( struct gl_context *ctx ) +{ + _math_matrix_mul_matrix( &ctx->_ModelProjectMatrix, + ctx->ProjectionMatrixStack.Top, + ctx->ModelviewMatrixStack.Top ); + + _math_matrix_analyse( &ctx->_ModelProjectMatrix ); +} + + +/** + * Updates the combined modelview-projection matrix. + * + * \param ctx GL context. + * \param new_state new state bit mask. + * + * If there is a new model view matrix then analyzes it. If there is a new + * projection matrix, updates it. Finally calls + * calculate_model_project_matrix() to recalculate the modelview-projection + * matrix. + */ +void _mesa_update_modelview_project( struct gl_context *ctx, GLuint new_state ) +{ + if (new_state & _NEW_MODELVIEW) { + _math_matrix_analyse( ctx->ModelviewMatrixStack.Top ); + + /* Bring cull position up to date. + */ + TRANSFORM_POINT3( ctx->Transform.CullObjPos, + ctx->ModelviewMatrixStack.Top->inv, + ctx->Transform.CullEyePos ); + } + + + if (new_state & _NEW_PROJECTION) + update_projection( ctx ); + + /* Keep ModelviewProject up to date always to allow tnl + * implementations that go model->clip even when eye is required. + */ + calculate_model_project_matrix(ctx); +} + +/*@}*/ + + +/**********************************************************************/ +/** Matrix stack initialization */ +/*@{*/ + + +/** + * Initialize a matrix stack. + * + * \param stack matrix stack. + * \param maxDepth maximum stack depth. + * \param dirtyFlag dirty flag. + * + * Allocates an array of \p maxDepth elements for the matrix stack and calls + * _math_matrix_ctr() and _math_matrix_alloc_inv() for each element to + * initialize it. + */ +static void +init_matrix_stack( struct gl_matrix_stack *stack, + GLuint maxDepth, GLuint dirtyFlag ) +{ + GLuint i; + + stack->Depth = 0; + stack->MaxDepth = maxDepth; + stack->DirtyFlag = dirtyFlag; + /* The stack */ + stack->Stack = (GLmatrix *) CALLOC(maxDepth * sizeof(GLmatrix)); + for (i = 0; i < maxDepth; i++) { + _math_matrix_ctr(&stack->Stack[i]); + _math_matrix_alloc_inv(&stack->Stack[i]); + } + stack->Top = stack->Stack; +} + +/** + * Free matrix stack. + * + * \param stack matrix stack. + * + * Calls _math_matrix_dtr() for each element of the matrix stack and + * frees the array. + */ +static void +free_matrix_stack( struct gl_matrix_stack *stack ) +{ + GLuint i; + for (i = 0; i < stack->MaxDepth; i++) { + _math_matrix_dtr(&stack->Stack[i]); + } + FREE(stack->Stack); + stack->Stack = stack->Top = NULL; +} + +/*@}*/ + + +/**********************************************************************/ +/** \name Initialization */ +/*@{*/ + + +/** + * Initialize the context matrix data. + * + * \param ctx GL context. + * + * Initializes each of the matrix stacks and the combined modelview-projection + * matrix. + */ +void _mesa_init_matrix( struct gl_context * ctx ) +{ + GLint i; + + /* Initialize matrix stacks */ + init_matrix_stack(&ctx->ModelviewMatrixStack, MAX_MODELVIEW_STACK_DEPTH, + _NEW_MODELVIEW); + init_matrix_stack(&ctx->ProjectionMatrixStack, MAX_PROJECTION_STACK_DEPTH, + _NEW_PROJECTION); + for (i = 0; i < Elements(ctx->TextureMatrixStack); i++) + init_matrix_stack(&ctx->TextureMatrixStack[i], MAX_TEXTURE_STACK_DEPTH, + _NEW_TEXTURE_MATRIX); + for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++) + init_matrix_stack(&ctx->ProgramMatrixStack[i], + MAX_PROGRAM_MATRIX_STACK_DEPTH, _NEW_TRACK_MATRIX); + ctx->CurrentStack = &ctx->ModelviewMatrixStack; + + /* Init combined Modelview*Projection matrix */ + _math_matrix_ctr( &ctx->_ModelProjectMatrix ); +} + + +/** + * Free the context matrix data. + * + * \param ctx GL context. + * + * Frees each of the matrix stacks and the combined modelview-projection + * matrix. + */ +void _mesa_free_matrix_data( struct gl_context *ctx ) +{ + GLint i; + + free_matrix_stack(&ctx->ModelviewMatrixStack); + free_matrix_stack(&ctx->ProjectionMatrixStack); + for (i = 0; i < Elements(ctx->TextureMatrixStack); i++) + free_matrix_stack(&ctx->TextureMatrixStack[i]); + for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++) + free_matrix_stack(&ctx->ProgramMatrixStack[i]); + /* combined Modelview*Projection matrix */ + _math_matrix_dtr( &ctx->_ModelProjectMatrix ); + +} + + +/** + * Initialize the context transform attribute group. + * + * \param ctx GL context. + * + * \todo Move this to a new file with other 'transform' routines. + */ +void _mesa_init_transform( struct gl_context *ctx ) +{ + GLint i; + + /* Transformation group */ + ctx->Transform.MatrixMode = GL_MODELVIEW; + ctx->Transform.Normalize = GL_FALSE; + ctx->Transform.RescaleNormals = GL_FALSE; + ctx->Transform.RasterPositionUnclipped = GL_FALSE; + for (i=0;i<ctx->Const.MaxClipPlanes;i++) { + ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 ); + } + ctx->Transform.ClipPlanesEnabled = 0; + + ASSIGN_4V( ctx->Transform.CullObjPos, 0.0, 0.0, 1.0, 0.0 ); + ASSIGN_4V( ctx->Transform.CullEyePos, 0.0, 0.0, 1.0, 0.0 ); +} + + +/*@}*/ |