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mutter/cogl/cogl-matrix-stack.h

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Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
/*
[cogl] Updates all file headers and removes lots of trailing white space Adds missing notices, and ensures all the notices are consistent. The Cogl blurb also now reads: * Cogl * * An object oriented GL/GLES Abstraction/Utility Layer
2009-04-27 14:48:12 +00:00
* Cogl
Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
*
[cogl] Updates all file headers and removes lots of trailing white space Adds missing notices, and ensures all the notices are consistent. The Cogl blurb also now reads: * Cogl * * An object oriented GL/GLES Abstraction/Utility Layer
2009-04-27 14:48:12 +00:00
* An object oriented GL/GLES Abstraction/Utility Layer
Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
*
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
* Copyright (C) 2009,2010 Intel Corporation.
Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
Remove mentions of the FSF address Since using addresses that might change is something that finally the FSF acknowledge as a plausible scenario (after changing address twice), the license blurb in the source files should use the URI for getting the license in case the library did not come with it. Not that URIs cannot possibly change, but at least it's easier to set up a redirection at the same place. As a side note: this commit closes the oldes bug in Clutter's bug report tool. http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 12:56:10 +00:00
*
*
[cogl] Updates all file headers and removes lots of trailing white space Adds missing notices, and ensures all the notices are consistent. The Cogl blurb also now reads: * Cogl * * An object oriented GL/GLES Abstraction/Utility Layer
2009-04-27 14:48:12 +00:00
*
* Authors:
* Havoc Pennington <hp@pobox.com> for litl
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
* Robert Bragg <robert@linux.intel.com>
Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
*/
#ifndef __COGL_MATRIX_STACK_H
#define __COGL_MATRIX_STACK_H
Intial Re-layout of the Cogl source code and introduction of a Cogl Winsys As part of an incremental process to have Cogl be a standalone project we want to re-consider how we organise the Cogl source code. Currently this is the structure I'm aiming for: cogl/ cogl/ <put common source here> winsys/ cogl-glx.c cogl-wgl.c driver/ gl/ gles/ os/ ? utils/ cogl-fixed cogl-matrix-stack? cogl-journal? cogl-primitives? pango/ The new winsys component is a starting point for migrating window system code (i.e. x11,glx,wgl,osx,egl etc) from Clutter to Cogl. The utils/ and pango/ directories aren't added by this commit, but they are noted because I plan to add them soon. Overview of the planned structure: * The winsys/ API is the API that binds OpenGL to a specific window system, be that X11 or win32 etc. Example are glx, wgl and egl. Much of the logic under clutter/{glx,osx,win32 etc} should migrate here. * Note there is also the idea of a winsys-base that may represent a window system for which there are multiple winsys APIs. An example of this is x11, since glx and egl may both be used with x11. (currently only Clutter has the idea of a winsys-base) * The driver/ represents a specific varient of OpenGL. Currently we have "gl" representing OpenGL 1.4-2.1 (mostly fixed function) and "gles" representing GLES 1.1 (fixed funciton) and 2.0 (fully shader based) * Everything under cogl/ should fundamentally be supporting access to the GPU. Essentially Cogl's most basic requirement is to provide a nice GPU Graphics API and drawing a line between this and the utility functionality we add to support Clutter should help keep this lean and maintainable. * Code under utils/ as suggested builds on cogl/ adding more convenient APIs or mechanism to optimize special cases. Broadly speaking you can compare cogl/ to OpenGL and utils/ to GLU. * clutter/pango will be moved to clutter/cogl/pango How some of the internal configure.ac/pkg-config terminology has changed: backendextra -> CLUTTER_WINSYS_BASE # e.g. "x11" backendextralib -> CLUTTER_WINSYS_BASE_LIB # e.g. "x11/libclutter-x11.la" clutterbackend -> {CLUTTER,COGL}_WINSYS # e.g. "glx" CLUTTER_FLAVOUR -> {CLUTTER,COGL}_WINSYS clutterbackendlib -> CLUTTER_WINSYS_LIB CLUTTER_COGL -> COGL_DRIVER # e.g. "gl" Note: The CLUTTER_FLAVOUR and CLUTTER_COGL defines are kept for apps As the first thing to take advantage of the new winsys component in Cogl; cogl_get_proc_address() has been moved from cogl/{gl,gles}/cogl.c into cogl/common/cogl.c and this common implementation first trys _cogl_winsys_get_proc_address() but if that fails then it falls back to gmodule.
2009-07-28 01:02:02 +00:00
#include "cogl-matrix.h"
matrix-stack: Avoid referencing the default CoglContext This removes the use of _COGL_GET_CONTEXT() from cogl-matrix-stack.c as part of the ongoing effort to evolve cogl to get rid of the need for a default context. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-11-21 14:22:01 +00:00
#include "cogl-context.h"
Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
typedef struct _CoglMatrixStack CoglMatrixStack;
Flush matrices in the progend and flip with a vector Previously flushing the matrices was performed as part of the framebuffer state. When on GLES2 this matrix flushing is actually diverted so that it only keeps a reference to the intended matrix stack. This is necessary because on GLES2 there are no builtin uniforms so it can't actually flush the matrices until the program for the pipeline is generated. When the matrices are flushed it would store the age of modifications on the matrix stack so that it could detect when the matrix hasn't changed and avoid flushing it. This patch changes it so that the pipeline is responsible for flushing the matrices even when we are using the GL builtins. The same mechanism for detecting unmodified matrix stacks is used in all cases. There is a new CoglMatrixStackCache type which is used to store a reference to the intended matrix stack along with its last flushed age. There are now two of these attached to the CoglContext to track the flushed state for the global matrix builtins and also two for each glsl progend program state to track the flushed state for a program. The framebuffer matrix flush now just updates the intended matrix stacks without actually trying to flush. When a vertex snippet is attached to the pipeline, the GLSL vertend will now avoid using the projection matrix to flip the rendering. This is necessary because any vertex snippet may cause the projection matrix not to be used. Instead the flip is done as a forced final step by multiplying cogl_position_out by a vec4 uniform. This uniform is updated as part of the progend pre_paint depending on whether the framebuffer is offscreen or not. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-29 14:21:07 +00:00
typedef struct
{
CoglMatrixStack *stack;
unsigned int age;
gboolean flushed_identity;
gboolean flipped;
} CoglMatrixStackCache;
build: Move CoglMatrixMode to cogl-matrix-stack.h This avoids a redeclaration of _cogl_matrix_stack_flush_to_gl() from using GLenum to CoglMatrixMode. http://bugzilla.openedhand.com/show_bug.cgi?id=1928
2010-01-04 11:58:32 +00:00
typedef enum {
COGL_MATRIX_MODELVIEW,
COGL_MATRIX_PROJECTION,
COGL_MATRIX_TEXTURE
} CoglMatrixMode;
matrix-stack: Avoid referencing the default CoglContext This removes the use of _COGL_GET_CONTEXT() from cogl-matrix-stack.c as part of the ongoing effort to evolve cogl to get rid of the need for a default context. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-11-21 14:22:01 +00:00
typedef void (* CoglMatrixStackFlushFunc) (CoglContext *context,
gboolean is_identity,
cogl: upload matrices with uniforms on GLES2 Once the GLES2 wrapper is removed we won't be able to upload the matrices with the fixed function API any more. The fixed function API gives a global state for setting the matrix but if a custom shader uniform is used for the matrices then the state is per program. _cogl_matrix_stack_flush_to_gl is called in a few places and it is assumed the current pipeline doesn't need to be flushed before it is called. To allow these semantics to continue to work, on GLES2 the matrix flush now just stores a reference to the matrix stack in the CoglContext. A pre_paint virtual is added to the progend which is called whenever a pipeline is flushed, even if the same pipeline was flushed already. This gives the GLSL progend a chance to upload the matrices to the uniforms. The combined modelview/projection matrix is only calculated if it is used. The generated programs end up never using the modelview or projection matrix so it usually only has to upload the combined matrix. When a matrix stack is flushed a reference is taked to it by the pipeline progend and the age is stored so that if the same state is used with the same program again then we don't need to reupload the uniform.
2010-12-06 12:31:51 +00:00
const CoglMatrix *matrix,
void *user_data);
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
CoglMatrixStack *
_cogl_matrix_stack_new (void);
[matrix] Adds cogl_matrix_get_inverse API This new API takes advantage of the recently imported Mesa code to support inverse matrix calculation. The matrix code keeps track (via internal flags) of the transformations a matrix represents so that it can select an optimized inversion function. Note: although other aspects of the Cogl matrix API have followed a similar style to Cairo's matrix API we haven't added a cogl_matrix_invert API because the inverse of a CoglMatrix is actually cached as part of the CoglMatrix structure meaning a destructive API like cogl_matrix_invert doesn't let users take advantage of this caching design.
2009-10-26 17:51:34 +00:00
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
void
_cogl_matrix_stack_push (CoglMatrixStack *stack);
void
_cogl_matrix_stack_pop (CoglMatrixStack *stack);
void
_cogl_matrix_stack_load_identity (CoglMatrixStack *stack);
void
_cogl_matrix_stack_scale (CoglMatrixStack *stack,
float x,
float y,
float z);
void
_cogl_matrix_stack_translate (CoglMatrixStack *stack,
float x,
float y,
float z);
void
_cogl_matrix_stack_rotate (CoglMatrixStack *stack,
float angle,
float x,
float y,
float z);
void
_cogl_matrix_stack_multiply (CoglMatrixStack *stack,
const CoglMatrix *matrix);
void
_cogl_matrix_stack_frustum (CoglMatrixStack *stack,
float left,
float right,
float bottom,
float top,
float z_near,
float z_far);
void
_cogl_matrix_stack_perspective (CoglMatrixStack *stack,
float fov_y,
float aspect,
float z_near,
float z_far);
void
_cogl_matrix_stack_ortho (CoglMatrixStack *stack,
float left,
float right,
float bottom,
float top,
float z_near,
float z_far);
gboolean
_cogl_matrix_stack_get_inverse (CoglMatrixStack *stack,
CoglMatrix *inverse);
void
_cogl_matrix_stack_get (CoglMatrixStack *stack,
CoglMatrix *matrix);
void
_cogl_matrix_stack_set (CoglMatrixStack *stack,
const CoglMatrix *matrix);
Flush matrices in the progend and flip with a vector Previously flushing the matrices was performed as part of the framebuffer state. When on GLES2 this matrix flushing is actually diverted so that it only keeps a reference to the intended matrix stack. This is necessary because on GLES2 there are no builtin uniforms so it can't actually flush the matrices until the program for the pipeline is generated. When the matrices are flushed it would store the age of modifications on the matrix stack so that it could detect when the matrix hasn't changed and avoid flushing it. This patch changes it so that the pipeline is responsible for flushing the matrices even when we are using the GL builtins. The same mechanism for detecting unmodified matrix stacks is used in all cases. There is a new CoglMatrixStackCache type which is used to store a reference to the intended matrix stack along with its last flushed age. There are now two of these attached to the CoglContext to track the flushed state for the global matrix builtins and also two for each glsl progend program state to track the flushed state for a program. The framebuffer matrix flush now just updates the intended matrix stacks without actually trying to flush. When a vertex snippet is attached to the pipeline, the GLSL vertend will now avoid using the projection matrix to flip the rendering. This is necessary because any vertex snippet may cause the projection matrix not to be used. Instead the flip is done as a forced final step by multiplying cogl_position_out by a vec4 uniform. This uniform is updated as part of the progend pre_paint depending on whether the framebuffer is offscreen or not. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-29 14:21:07 +00:00
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
void
Flush matrices in the progend and flip with a vector Previously flushing the matrices was performed as part of the framebuffer state. When on GLES2 this matrix flushing is actually diverted so that it only keeps a reference to the intended matrix stack. This is necessary because on GLES2 there are no builtin uniforms so it can't actually flush the matrices until the program for the pipeline is generated. When the matrices are flushed it would store the age of modifications on the matrix stack so that it could detect when the matrix hasn't changed and avoid flushing it. This patch changes it so that the pipeline is responsible for flushing the matrices even when we are using the GL builtins. The same mechanism for detecting unmodified matrix stacks is used in all cases. There is a new CoglMatrixStackCache type which is used to store a reference to the intended matrix stack along with its last flushed age. There are now two of these attached to the CoglContext to track the flushed state for the global matrix builtins and also two for each glsl progend program state to track the flushed state for a program. The framebuffer matrix flush now just updates the intended matrix stacks without actually trying to flush. When a vertex snippet is attached to the pipeline, the GLSL vertend will now avoid using the projection matrix to flip the rendering. This is necessary because any vertex snippet may cause the projection matrix not to be used. Instead the flip is done as a forced final step by multiplying cogl_position_out by a vec4 uniform. This uniform is updated as part of the progend pre_paint depending on whether the framebuffer is offscreen or not. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-29 14:21:07 +00:00
_cogl_matrix_stack_flush_to_gl_builtins (CoglContext *ctx,
CoglMatrixStack *stack,
CoglMatrixMode mode,
gboolean disable_flip);
matrix-stack: Make header style consistent Cogl doesn't follow the Clutter/GTK+ columnized function prototype style so this updates cogl-matrix-stack.h to match the other Cogl headers.
2010-12-10 11:34:02 +00:00
unsigned int
_cogl_matrix_stack_get_age (CoglMatrixStack *stack);
matrix-stack: Adds a stack age counter Sometimes it would be useful if we could efficiently track when a matrix stack has been modified. For example on GLES2 we have to upload the modelview as a uniform to our glsl programs but because the modelview state is part of the framebuffer state it becomes a bit more tricky to know when to re-sync the value of the uniform with the framebuffer state. This adds an "age" counter to CoglMatrixStack which is incremented for any operation that effectively modifies the top of the stack so now we can save the age of the stack inside the pipeline whenever we update modelview uniform and later compare that with the stack to determine if it has changed.
2010-12-10 11:13:09 +00:00
cogl-matrix-stack: Add _cogl_matrix_stack_has_identity_flag This adds an internal function to quickly determine whether the top of the matrix stack is known to be the identity matrix.
2010-12-10 17:42:39 +00:00
/* If this returns TRUE then the top of the matrix is definitely the
identity matrix. If it returns FALSE it may or may not be the
identity matrix but no expensive comparison is performed to verify
it. */
gboolean
_cogl_matrix_stack_has_identity_flag (CoglMatrixStack *stack);
cogl-matrix-stack: Adds _cogl_matrix_stack_equal Adds a function for comparing the top matrix entries of two matrix stacks. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-11-21 15:49:58 +00:00
gboolean
_cogl_matrix_stack_equal (CoglMatrixStack *stack0,
CoglMatrixStack *stack1);
Flush matrices in the progend and flip with a vector Previously flushing the matrices was performed as part of the framebuffer state. When on GLES2 this matrix flushing is actually diverted so that it only keeps a reference to the intended matrix stack. This is necessary because on GLES2 there are no builtin uniforms so it can't actually flush the matrices until the program for the pipeline is generated. When the matrices are flushed it would store the age of modifications on the matrix stack so that it could detect when the matrix hasn't changed and avoid flushing it. This patch changes it so that the pipeline is responsible for flushing the matrices even when we are using the GL builtins. The same mechanism for detecting unmodified matrix stacks is used in all cases. There is a new CoglMatrixStackCache type which is used to store a reference to the intended matrix stack along with its last flushed age. There are now two of these attached to the CoglContext to track the flushed state for the global matrix builtins and also two for each glsl progend program state to track the flushed state for a program. The framebuffer matrix flush now just updates the intended matrix stacks without actually trying to flush. When a vertex snippet is attached to the pipeline, the GLSL vertend will now avoid using the projection matrix to flip the rendering. This is necessary because any vertex snippet may cause the projection matrix not to be used. Instead the flip is done as a forced final step by multiplying cogl_position_out by a vec4 uniform. This uniform is updated as part of the progend pre_paint depending on whether the framebuffer is offscreen or not. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-11-29 14:21:07 +00:00
void
_cogl_matrix_stack_init_cache (CoglMatrixStackCache *cache);
gboolean
_cogl_matrix_stack_check_and_update_cache (CoglMatrixStack *stack,
CoglMatrixStackCache *cache,
gboolean flip);
void
_cogl_matrix_stack_destroy_cache (CoglMatrixStackCache *cache);
Virtualize GL matrix operations and use a client-side matrix when GL is indirect This is useful because sometimes we need to get the current matrix, which is too expensive when indirect rendering. In addition, this virtualization makes it easier to clean up the API in the future.
2009-02-24 18:51:25 +00:00
#endif /* __COGL_MATRIX_STACK_H */
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