mirror of
https://github.com/brl/mutter.git
synced 2024-11-27 02:20:43 -05:00
da3be3df6b
This adds a new API call to enable point sprite coordinate generation
for a material layer:
void
cogl_material_set_layer_point_sprite_coords_enabled (CoglHandle material,
int layer_index,
gboolean enable);
There is also a corresponding get function.
Enabling point sprite coords simply sets the GL_COORD_REPLACE of the
GL_POINT_SPRITE glTexEnv when flusing the material. There is no
separate application control for glEnable(GL_POINT_SPRITE). Instead it
is left permanently enabled under the assumption that it has no affect
unless GL_COORD_REPLACE is enabled for a texture unit.
http://bugzilla.openedhand.com/show_bug.cgi?id=2047
328 lines
10 KiB
C
328 lines
10 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/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "cogl.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-util.h"
|
|
#include "cogl-context.h"
|
|
#include "cogl-journal-private.h"
|
|
#include "cogl-texture-private.h"
|
|
#include "cogl-material-private.h"
|
|
#include "cogl-framebuffer-private.h"
|
|
#include "cogl-path-private.h"
|
|
|
|
#include <string.h>
|
|
|
|
#ifdef HAVE_COGL_GL
|
|
#define glActiveTexture _context->drv.pf_glActiveTexture
|
|
#endif
|
|
|
|
/* This isn't defined in the GLES headers */
|
|
#ifndef GL_POINT_SPRITE
|
|
#define GL_POINT_SPRITE 0x8861
|
|
#endif
|
|
|
|
extern void
|
|
_cogl_create_context_driver (CoglContext *context);
|
|
extern void
|
|
_cogl_create_context_winsys (CoglContext *context);
|
|
extern void
|
|
_cogl_destroy_context_winsys (CoglContext *context);
|
|
|
|
static CoglContext *_context = NULL;
|
|
static gboolean gl_is_indirect = FALSE;
|
|
|
|
static gboolean
|
|
cogl_create_context (void)
|
|
{
|
|
GLubyte default_texture_data[] = { 0xff, 0xff, 0xff, 0x0 };
|
|
unsigned long enable_flags = 0;
|
|
CoglHandle window_buffer;
|
|
int i;
|
|
|
|
if (_context != NULL)
|
|
return FALSE;
|
|
|
|
/* Allocate context memory */
|
|
_context = (CoglContext*) g_malloc (sizeof (CoglContext));
|
|
|
|
/* Init default values */
|
|
_context->feature_flags = 0;
|
|
_context->feature_flags_private = 0;
|
|
_context->features_cached = FALSE;
|
|
|
|
_context->texture_types = NULL;
|
|
_context->buffer_types = NULL;
|
|
|
|
/* Initialise the driver specific state */
|
|
/* TODO: combine these two into one function */
|
|
_cogl_create_context_driver (_context);
|
|
_cogl_features_init ();
|
|
|
|
_cogl_create_context_winsys (_context);
|
|
|
|
_cogl_material_init_default_material ();
|
|
_cogl_material_init_default_layers ();
|
|
|
|
_context->enable_flags = 0;
|
|
|
|
_context->enable_backface_culling = FALSE;
|
|
_context->flushed_front_winding = COGL_FRONT_WINDING_COUNTER_CLOCKWISE;
|
|
|
|
_context->indirect = gl_is_indirect;
|
|
|
|
cogl_matrix_init_identity (&_context->identity_matrix);
|
|
cogl_matrix_init_identity (&_context->y_flip_matrix);
|
|
cogl_matrix_scale (&_context->y_flip_matrix, 1, -1, 1);
|
|
|
|
_context->flushed_matrix_mode = COGL_MATRIX_MODELVIEW;
|
|
|
|
_context->texture_units =
|
|
g_array_new (FALSE, FALSE, sizeof (CoglTextureUnit));
|
|
|
|
/* See cogl-material.c for more details about why we leave texture unit 1
|
|
* active by default... */
|
|
_context->active_texture_unit = 1;
|
|
GE (glActiveTexture (GL_TEXTURE1));
|
|
|
|
_context->legacy_fog_state.enabled = FALSE;
|
|
|
|
_context->simple_material = cogl_material_new ();
|
|
_context->source_material = NULL;
|
|
_context->arbfp_source_buffer = g_string_new ("");
|
|
|
|
_context->legacy_state_set = 0;
|
|
|
|
_context->default_gl_texture_2d_tex = COGL_INVALID_HANDLE;
|
|
_context->default_gl_texture_rect_tex = COGL_INVALID_HANDLE;
|
|
|
|
_context->journal = g_array_new (FALSE, FALSE, sizeof (CoglJournalEntry));
|
|
_context->logged_vertices = g_array_new (FALSE, FALSE, sizeof (GLfloat));
|
|
|
|
_context->current_material = NULL;
|
|
_context->current_material_changes_since_flush = 0;
|
|
_context->current_material_skip_gl_color = FALSE;
|
|
|
|
_context->material0_nodes =
|
|
g_array_sized_new (FALSE, FALSE, sizeof (CoglHandle), 20);
|
|
_context->material1_nodes =
|
|
g_array_sized_new (FALSE, FALSE, sizeof (CoglHandle), 20);
|
|
|
|
_cogl_bitmask_init (&_context->texcoord_arrays_enabled);
|
|
_cogl_bitmask_init (&_context->temp_bitmask);
|
|
_cogl_bitmask_init (&_context->texcoord_arrays_to_disable);
|
|
|
|
_context->max_texture_units = -1;
|
|
_context->max_texture_image_units = -1;
|
|
_context->max_activateable_texture_units = -1;
|
|
|
|
_context->current_program = COGL_INVALID_HANDLE;
|
|
|
|
_context->current_use_program_type = COGL_MATERIAL_PROGRAM_TYPE_FIXED;
|
|
_context->current_gl_program = 0;
|
|
|
|
_context->gl_blend_enable_cache = FALSE;
|
|
|
|
_context->depth_test_enabled_cache = FALSE;
|
|
_context->depth_test_function_cache = COGL_DEPTH_TEST_FUNCTION_LESS;
|
|
_context->depth_writing_enabled_cache = TRUE;
|
|
_context->depth_range_near_cache = 0;
|
|
_context->depth_range_far_cache = 1;
|
|
|
|
_context->point_size_cache = 1.0f;
|
|
|
|
_context->legacy_depth_test_enabled = FALSE;
|
|
|
|
for (i = 0; i < COGL_BUFFER_BIND_TARGET_COUNT; i++)
|
|
_context->current_buffer[i] = NULL;
|
|
|
|
_context->framebuffer_stack = _cogl_create_framebuffer_stack ();
|
|
|
|
window_buffer = _cogl_onscreen_new ();
|
|
cogl_set_framebuffer (window_buffer);
|
|
/* XXX: the deprecated _cogl_set_draw_buffer API expects to
|
|
* find the window buffer here... */
|
|
_context->window_buffer = window_buffer;
|
|
|
|
_context->dirty_bound_framebuffer = TRUE;
|
|
_context->dirty_gl_viewport = TRUE;
|
|
|
|
_context->current_path = _cogl_path_new ();
|
|
_context->stencil_material = cogl_material_new ();
|
|
|
|
_context->in_begin_gl_block = FALSE;
|
|
|
|
_context->quad_indices_byte = COGL_INVALID_HANDLE;
|
|
_context->quad_indices_short = COGL_INVALID_HANDLE;
|
|
_context->quad_indices_short_len = 0;
|
|
|
|
_context->texture_download_material = COGL_INVALID_HANDLE;
|
|
|
|
/* The default for GL_ALPHA_TEST is to always pass which is equivalent to
|
|
* the test being disabled therefore we assume that for all drivers there
|
|
* will be no performance impact if we always leave the test enabled which
|
|
* makes things a bit simpler for us. */
|
|
GE (glEnable (GL_ALPHA_TEST));
|
|
|
|
/* Create default textures used for fall backs */
|
|
_context->default_gl_texture_2d_tex =
|
|
cogl_texture_new_from_data (1, /* width */
|
|
1, /* height */
|
|
COGL_TEXTURE_NO_SLICING,
|
|
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* data format */
|
|
/* internal format */
|
|
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
|
|
0, /* auto calc row stride */
|
|
default_texture_data);
|
|
_context->default_gl_texture_rect_tex =
|
|
cogl_texture_new_from_data (1, /* width */
|
|
1, /* height */
|
|
COGL_TEXTURE_NO_SLICING,
|
|
COGL_PIXEL_FORMAT_RGBA_8888_PRE, /* data format */
|
|
/* internal format */
|
|
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
|
|
0, /* auto calc row stride */
|
|
default_texture_data);
|
|
|
|
cogl_set_source (_context->simple_material);
|
|
_cogl_material_flush_gl_state (_context->source_material, FALSE);
|
|
_cogl_enable (enable_flags);
|
|
_cogl_flush_face_winding ();
|
|
|
|
_context->atlas = NULL;
|
|
_context->atlas_texture = COGL_INVALID_HANDLE;
|
|
|
|
/* As far as I can tell, GL_POINT_SPRITE doesn't have any effect
|
|
unless GL_COORD_REPLACE is enabled for an individual
|
|
layer. Therefore it seems like it should be ok to just leave it
|
|
enabled all the time instead of having to have a set property on
|
|
each material to track whether any layers have point sprite
|
|
coords enabled */
|
|
if (cogl_features_available (COGL_FEATURE_POINT_SPRITE))
|
|
GE (glEnable (GL_POINT_SPRITE));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
_cogl_destroy_context (void)
|
|
{
|
|
|
|
if (_context == NULL)
|
|
return;
|
|
|
|
_cogl_destroy_context_winsys (_context);
|
|
|
|
_cogl_destroy_texture_units ();
|
|
|
|
_cogl_free_framebuffer_stack (_context->framebuffer_stack);
|
|
|
|
if (_context->current_path)
|
|
cogl_handle_unref (_context->current_path);
|
|
|
|
if (_context->default_gl_texture_2d_tex)
|
|
cogl_handle_unref (_context->default_gl_texture_2d_tex);
|
|
if (_context->default_gl_texture_rect_tex)
|
|
cogl_handle_unref (_context->default_gl_texture_rect_tex);
|
|
|
|
if (_context->simple_material)
|
|
cogl_handle_unref (_context->simple_material);
|
|
|
|
if (_context->journal)
|
|
g_array_free (_context->journal, TRUE);
|
|
if (_context->logged_vertices)
|
|
g_array_free (_context->logged_vertices, TRUE);
|
|
|
|
if (_context->quad_indices_byte)
|
|
cogl_handle_unref (_context->quad_indices_byte);
|
|
if (_context->quad_indices_short)
|
|
cogl_handle_unref (_context->quad_indices_short);
|
|
|
|
if (_context->default_material)
|
|
cogl_handle_unref (_context->default_material);
|
|
|
|
if (_context->dummy_layer_dependant)
|
|
cogl_handle_unref (_context->dummy_layer_dependant);
|
|
if (_context->default_layer_n)
|
|
cogl_handle_unref (_context->default_layer_n);
|
|
if (_context->default_layer_0)
|
|
cogl_handle_unref (_context->default_layer_0);
|
|
|
|
if (_context->atlas)
|
|
_cogl_atlas_free (_context->atlas);
|
|
if (_context->atlas_texture)
|
|
cogl_handle_unref (_context->atlas_texture);
|
|
|
|
_cogl_bitmask_destroy (&_context->texcoord_arrays_enabled);
|
|
_cogl_bitmask_destroy (&_context->temp_bitmask);
|
|
_cogl_bitmask_destroy (&_context->texcoord_arrays_to_disable);
|
|
|
|
g_slist_free (_context->texture_types);
|
|
g_slist_free (_context->buffer_types);
|
|
|
|
g_free (_context);
|
|
}
|
|
|
|
CoglContext *
|
|
_cogl_context_get_default (void)
|
|
{
|
|
/* Create if doesn't exist yet */
|
|
if (_context == NULL)
|
|
cogl_create_context ();
|
|
|
|
return _context;
|
|
}
|
|
|
|
/**
|
|
* _cogl_set_indirect_context:
|
|
* @indirect: TRUE if GL context is indirect
|
|
*
|
|
* Advises COGL that the GL context is indirect (commands are sent
|
|
* over a socket). COGL uses this information to try to avoid
|
|
* round-trips in its use of GL, for example.
|
|
*
|
|
* This function cannot be called "on the fly," only before COGL
|
|
* initializes.
|
|
*/
|
|
void
|
|
_cogl_set_indirect_context (gboolean indirect)
|
|
{
|
|
/* we get called multiple times if someone creates
|
|
* more than the default stage
|
|
*/
|
|
if (_context != NULL)
|
|
{
|
|
if (indirect != _context->indirect)
|
|
g_warning ("Right now all stages will be treated as "
|
|
"either direct or indirect, ignoring attempt "
|
|
"to change to indirect=%d", indirect);
|
|
return;
|
|
}
|
|
|
|
gl_is_indirect = indirect;
|
|
}
|