mirror of
https://github.com/brl/mutter.git
synced 2024-09-20 06:25:51 -04:00
067a520f26
This adds three new API calls: CoglHandle cogl_path_get() void cogl_path_set(CoglHandle path) CoglHandle cogl_path_copy(CoglHandle path) All of the fields relating to the path have been moved from the Cogl context to a new CoglPath handle type. The cogl context now just contains a CoglPath handle. All of the existing path commands manipulate the data in the current path handle. cogl_path_new now just creates a new path handle and unrefs the old one. The path handle can be stored for later with cogl_path_get. The path can then be copied with cogl_path_copy. Internally it implements copy-on-write semantics with an extra optimisation that it will only copy the data if the new path is modified, but not if the original path is modified. It can do this because the only way to modify a path is by appending to it so the copied path is able to store its own path length and only render the nodes up to that length. For this to work the copied path also needs to keep its own copies of the path extents because the parent path may change these by adding nodes. The clip stack now uses the cogl_path_copy mechanism to store paths in the stack instead of directly copying the data. This should save some memory and processing time.
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
*
|
|
* 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
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_CONTEXT_H
|
|
#define __COGL_CONTEXT_H
|
|
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context-driver.h"
|
|
#include "cogl-primitives.h"
|
|
#include "cogl-clip-stack.h"
|
|
#include "cogl-matrix-stack.h"
|
|
#include "cogl-material-private.h"
|
|
#include "cogl-atlas.h"
|
|
#include "cogl-buffer-private.h"
|
|
|
|
typedef struct
|
|
{
|
|
GLfloat v[3];
|
|
GLfloat t[2];
|
|
GLubyte c[4];
|
|
} CoglTextureGLVertex;
|
|
|
|
typedef struct
|
|
{
|
|
/* Features cache */
|
|
CoglFeatureFlags feature_flags;
|
|
gboolean features_cached;
|
|
|
|
CoglHandle default_material;
|
|
|
|
/* Enable cache */
|
|
unsigned long enable_flags;
|
|
guint8 color_alpha;
|
|
|
|
gboolean enable_backface_culling;
|
|
CoglFrontWinding flushed_front_winding;
|
|
|
|
gboolean indirect;
|
|
|
|
/* A few handy matrix constants */
|
|
CoglMatrix identity_matrix;
|
|
CoglMatrix y_flip_matrix;
|
|
|
|
/* Client-side matrix stack or NULL if none */
|
|
CoglMatrixMode flushed_matrix_mode;
|
|
GList *texture_units;
|
|
|
|
/* Materials */
|
|
CoglHandle simple_material;
|
|
CoglHandle source_material;
|
|
|
|
/* Textures */
|
|
CoglHandle default_gl_texture_2d_tex;
|
|
CoglHandle default_gl_texture_rect_tex;
|
|
|
|
/* Batching geometry... */
|
|
/* We journal the texture rectangles we want to submit to OpenGL so
|
|
* we have an oppertunity to optimise the final order so that we
|
|
* can batch things together. */
|
|
GArray *journal;
|
|
GArray *logged_vertices;
|
|
GArray *polygon_vertices;
|
|
|
|
/* Some simple caching, to minimize state changes... */
|
|
CoglHandle current_material;
|
|
unsigned long current_material_flags;
|
|
CoglMaterialFlushOptions current_material_flush_options;
|
|
GArray *current_layers;
|
|
unsigned int n_texcoord_arrays_enabled;
|
|
|
|
/* PBOs */
|
|
/* This can be used to check if a pbo is bound */
|
|
CoglBuffer *current_pbo;
|
|
|
|
/* Framebuffers */
|
|
GSList *framebuffer_stack;
|
|
CoglHandle window_buffer;
|
|
gboolean dirty_bound_framebuffer;
|
|
gboolean dirty_gl_viewport;
|
|
|
|
/* Primitives */
|
|
CoglHandle current_path;
|
|
CoglHandle stencil_material;
|
|
|
|
/* Pre-generated VBOs containing indices to generate GL_TRIANGLES
|
|
out of a vertex array of quads */
|
|
CoglHandle quad_indices_byte;
|
|
unsigned int quad_indices_short_len;
|
|
CoglHandle quad_indices_short;
|
|
|
|
gboolean in_begin_gl_block;
|
|
|
|
CoglHandle texture_download_material;
|
|
|
|
CoglAtlas *atlas;
|
|
CoglHandle atlas_texture;
|
|
|
|
/* This debugging variable is used to pick a colour for visually
|
|
displaying the quad batches. It needs to be global so that it can
|
|
be reset by cogl_clear. It needs to be reset to increase the
|
|
chances of getting the same colour during an animation */
|
|
guint8 journal_rectangles_color;
|
|
|
|
/* Cached value for GL_MAX_TEXTURE_UNITS to avoid calling
|
|
glGetInteger too often */
|
|
GLint max_texture_units;
|
|
|
|
CoglContextDriver drv;
|
|
} CoglContext;
|
|
|
|
CoglContext *
|
|
_cogl_context_get_default ();
|
|
|
|
/* Obtains the context and returns retval if NULL */
|
|
#define _COGL_GET_CONTEXT(ctxvar, retval) \
|
|
CoglContext *ctxvar = _cogl_context_get_default (); \
|
|
if (ctxvar == NULL) return retval;
|
|
|
|
#define NO_RETVAL
|
|
|
|
#endif /* __COGL_CONTEXT_H */
|