| /* |
| * 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->API == API_OPENGL && 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->API == API_OPENGL |
| && (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() 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]); |
| } |
| 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 ); |
| } |
| |
| |
| /*@}*/ |