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5e8ff248d2
This adds the following new functions to apply a rotation described by a euler or a quaternion to either a CoglMatrix or directly to the modelview stack of a framebuffer: cogl_matrix_rotate_quaternion cogl_matrix_rotate_euler cogl_framebuffer_rotate_quaternion cogl_framebuffer_rotate_euler The direct framebuffer functions have corresponding functions in the CoglMatrixStack to store an entry describing the rotation. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5064315678b496395e1d01f266f322d73e55e324)
308 lines
8.0 KiB
C
308 lines
8.0 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) 2009,2010,2012 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-object-private.h"
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#include "cogl-matrix.h"
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#include "cogl-context.h"
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#include "cogl-framebuffer.h"
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typedef enum _CoglMatrixOp
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{
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COGL_MATRIX_OP_LOAD_IDENTITY,
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COGL_MATRIX_OP_TRANSLATE,
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COGL_MATRIX_OP_ROTATE,
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COGL_MATRIX_OP_ROTATE_QUATERNION,
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COGL_MATRIX_OP_ROTATE_EULER,
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COGL_MATRIX_OP_SCALE,
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COGL_MATRIX_OP_MULTIPLY,
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COGL_MATRIX_OP_LOAD,
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COGL_MATRIX_OP_SAVE,
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} CoglMatrixOp;
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typedef struct _CoglMatrixEntry CoglMatrixEntry;
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struct _CoglMatrixEntry
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{
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CoglMatrixOp op;
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CoglMatrixEntry *parent;
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unsigned int ref_count;
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/* used for performance tracing */
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int composite_gets;
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};
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typedef struct _CoglMatrixEntryTranslate
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{
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CoglMatrixEntry _parent_data;
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float x;
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float y;
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float z;
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} CoglMatrixEntryTranslate;
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typedef struct _CoglMatrixEntryRotate
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{
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CoglMatrixEntry _parent_data;
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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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} CoglMatrixEntryRotate;
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typedef struct _CoglMatrixEntryRotateEuler
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{
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CoglMatrixEntry _parent_data;
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/* This doesn't store an actual CoglEuler in order to avoid the
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* padding */
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float heading;
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float pitch;
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float roll;
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} CoglMatrixEntryRotateEuler;
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typedef struct _CoglMatrixEntryRotateQuaternion
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{
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CoglMatrixEntry _parent_data;
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/* This doesn't store an actual CoglQuaternion in order to avoid the
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* padding */
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float values[4];
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} CoglMatrixEntryRotateQuaternion;
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typedef struct _CoglMatrixEntryScale
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{
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CoglMatrixEntry _parent_data;
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float x;
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float y;
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float z;
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} CoglMatrixEntryScale;
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typedef struct _CoglMatrixEntryMultiply
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{
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CoglMatrixEntry _parent_data;
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CoglMatrix *matrix;
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} CoglMatrixEntryMultiply;
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typedef struct _CoglMatrixEntryLoad
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{
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CoglMatrixEntry _parent_data;
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CoglMatrix *matrix;
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} CoglMatrixEntryLoad;
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typedef struct _CoglMatrixEntrySave
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{
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CoglMatrixEntry _parent_data;
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CoglBool cache_valid;
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CoglMatrix *cache;
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} CoglMatrixEntrySave;
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typedef union _CoglMatrixEntryFull
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{
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CoglMatrixEntry any;
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CoglMatrixEntryTranslate translate;
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CoglMatrixEntryRotate rotate;
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CoglMatrixEntryRotateEuler rotate_euler;
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CoglMatrixEntryRotateQuaternion rotate_quaternion;
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CoglMatrixEntryScale scale;
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CoglMatrixEntryMultiply multiply;
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CoglMatrixEntryLoad load;
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CoglMatrixEntrySave save;
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} CoglMatrixEntryFull;
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typedef struct _CoglMatrixStack
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{
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CoglObject _parent;
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CoglMatrixEntry *last_entry;
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} CoglMatrixStack;
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typedef struct _CoglMatrixEntryCache
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{
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CoglMatrixEntry *entry;
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CoglBool flushed_identity;
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CoglBool flipped;
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} CoglMatrixEntryCache;
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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_entry_identity_init (CoglMatrixEntry *entry);
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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_rotate_quaternion (CoglMatrixStack *stack,
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const CoglQuaternion *quaternion);
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void
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_cogl_matrix_stack_rotate_euler (CoglMatrixStack *stack,
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const CoglEuler *euler);
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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_orthographic (CoglMatrixStack *stack,
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float x_1,
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float y_1,
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float x_2,
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float y_2,
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float near,
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float far);
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CoglBool
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_cogl_matrix_stack_get_inverse (CoglMatrixStack *stack,
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CoglMatrix *inverse);
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/* NB: This function only *sometimes* returns a pointer to a matrix if
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* the matrix returned didn't need to be composed of multiple
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* operations */
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CoglMatrix *
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_cogl_matrix_stack_get (CoglMatrixStack *stack,
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CoglMatrix *matrix);
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/* NB: This function only *sometimes* returns a pointer to a matrix if
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* the matrix returned didn't need to be composed of multiple
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* operations */
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CoglMatrix *
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_cogl_matrix_entry_get (CoglMatrixEntry *entry,
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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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CoglBool
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_cogl_matrix_entry_calculate_translation (CoglMatrixEntry *entry0,
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CoglMatrixEntry *entry1,
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float *x,
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float *y,
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float *z);
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/* If this returns TRUE then the entry is definitely the identity
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* matrix. If it returns FALSE it may or may not be the identity
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* matrix but no expensive comparison is performed to verify it. */
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CoglBool
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_cogl_matrix_entry_has_identity_flag (CoglMatrixEntry *entry);
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CoglBool
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_cogl_matrix_entry_fast_equal (CoglMatrixEntry *entry0,
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CoglMatrixEntry *entry1);
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CoglBool
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_cogl_matrix_entry_equal (CoglMatrixEntry *entry0,
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CoglMatrixEntry *entry1);
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void
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_cogl_matrix_entry_print (CoglMatrixEntry *entry);
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CoglMatrixEntry *
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_cogl_matrix_entry_ref (CoglMatrixEntry *entry);
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void
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_cogl_matrix_entry_unref (CoglMatrixEntry *entry);
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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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void
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_cogl_matrix_entry_flush_to_gl_builtins (CoglContext *ctx,
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CoglMatrixEntry *entry,
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CoglMatrixMode mode,
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CoglFramebuffer *framebuffer,
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CoglBool disable_flip);
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void
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_cogl_matrix_entry_cache_init (CoglMatrixEntryCache *cache);
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CoglBool
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_cogl_matrix_entry_cache_maybe_update (CoglMatrixEntryCache *cache,
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CoglMatrixEntry *entry,
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CoglBool flip);
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void
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_cogl_matrix_entry_cache_destroy (CoglMatrixEntryCache *cache);
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CoglBool
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_cogl_is_matrix_stack (void *object);
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#endif /* __COGL_MATRIX_STACK_H */
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