595311ba55
Adds a function for comparing the top matrix entries of two matrix stacks. Reviewed-by: Neil Roberts <neil@linux.intel.com>
135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2009,2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Havoc Pennington <hp@pobox.com> for litl
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifndef __COGL_MATRIX_STACK_H
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#define __COGL_MATRIX_STACK_H
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#include "cogl-matrix.h"
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typedef struct _CoglMatrixStack CoglMatrixStack;
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typedef enum {
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COGL_MATRIX_MODELVIEW,
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COGL_MATRIX_PROJECTION,
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COGL_MATRIX_TEXTURE
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} CoglMatrixMode;
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typedef void (* CoglMatrixStackFlushFunc) (gboolean is_identity,
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const CoglMatrix *matrix,
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void *user_data);
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CoglMatrixStack *
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_cogl_matrix_stack_new (void);
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void
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_cogl_matrix_stack_push (CoglMatrixStack *stack);
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void
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_cogl_matrix_stack_pop (CoglMatrixStack *stack);
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void
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_cogl_matrix_stack_load_identity (CoglMatrixStack *stack);
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void
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_cogl_matrix_stack_scale (CoglMatrixStack *stack,
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float x,
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float y,
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float z);
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void
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_cogl_matrix_stack_translate (CoglMatrixStack *stack,
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float x,
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float y,
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float z);
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void
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_cogl_matrix_stack_rotate (CoglMatrixStack *stack,
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float angle,
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float x,
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float y,
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float z);
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void
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_cogl_matrix_stack_multiply (CoglMatrixStack *stack,
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const CoglMatrix *matrix);
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void
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_cogl_matrix_stack_frustum (CoglMatrixStack *stack,
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float left,
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float right,
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float bottom,
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float top,
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float z_near,
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float z_far);
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void
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_cogl_matrix_stack_perspective (CoglMatrixStack *stack,
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float fov_y,
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float aspect,
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float z_near,
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float z_far);
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void
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_cogl_matrix_stack_ortho (CoglMatrixStack *stack,
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float left,
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float right,
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float bottom,
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float top,
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float z_near,
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float z_far);
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gboolean
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_cogl_matrix_stack_get_inverse (CoglMatrixStack *stack,
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CoglMatrix *inverse);
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void
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_cogl_matrix_stack_get (CoglMatrixStack *stack,
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CoglMatrix *matrix);
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void
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_cogl_matrix_stack_set (CoglMatrixStack *stack,
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const CoglMatrix *matrix);
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void
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_cogl_matrix_stack_flush_to_gl (CoglMatrixStack *stack,
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CoglMatrixMode mode);
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void
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_cogl_matrix_stack_dirty (CoglMatrixStack *stack);
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unsigned int
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_cogl_matrix_stack_get_age (CoglMatrixStack *stack);
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/* If this returns TRUE then the top of the matrix is definitely the
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identity matrix. If it returns FALSE it may or may not be the
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identity matrix but no expensive comparison is performed to verify
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it. */
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gboolean
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_cogl_matrix_stack_has_identity_flag (CoglMatrixStack *stack);
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void
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_cogl_matrix_stack_prepare_for_flush (CoglMatrixStack *stack,
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CoglMatrixMode mode,
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CoglMatrixStackFlushFunc callback,
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void *user_data);
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gboolean
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_cogl_matrix_stack_equal (CoglMatrixStack *stack0,
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CoglMatrixStack *stack1);
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#endif /* __COGL_MATRIX_STACK_H */
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