brl/mutter
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cogl-atlas-texture: Split out the atlas data structure

Browse Source 
Instead of storing a pointer to the CoglRectangleMap and a handle to
the atlas texture in the context, there is a now a separate data
structure called a CoglAtlas to manage these two. The context just
contains a pointer to this. The code to reorganise the atlas has been
moved from cogl-atlas-texture.c to cogl-atlas.c
This commit is contained in:
Neil Roberts 2010-08-02 16:29:10 +01:00
parent 0c8582aad8
commit 9b2f8179f0
7 changed files with 779 additions and 519 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
clutter/cogl/cogl/Makefile.am
View File

@ -146,6 +146,8 @@ cogl_sources_c = \
$(srcdir)/cogl-texture-rectangle.c \ $(srcdir)/cogl-texture-rectangle.c \
$(srcdir)/cogl-rectangle-map.h \ $(srcdir)/cogl-rectangle-map.h \
$(srcdir)/cogl-rectangle-map.c \ $(srcdir)/cogl-rectangle-map.c \
$(srcdir)/cogl-atlas.h \
$(srcdir)/cogl-atlas.c \
$(srcdir)/cogl-atlas-texture-private.h \ $(srcdir)/cogl-atlas-texture-private.h \
$(srcdir)/cogl-atlas-texture.c \ $(srcdir)/cogl-atlas-texture.c \
$(srcdir)/cogl-spans.h \ $(srcdir)/cogl-spans.h \

4
clutter/cogl/cogl/cogl-atlas-texture-private.h
View File

@ -27,6 +27,7 @@
#include "cogl-handle.h" #include "cogl-handle.h"
#include "cogl-texture-private.h" #include "cogl-texture-private.h"
#include "cogl-rectangle-map.h" #include "cogl-rectangle-map.h"
#include "cogl-atlas.h"
#define COGL_ATLAS_TEXTURE(tex) ((CoglAtlasTexture *) tex) #define COGL_ATLAS_TEXTURE(tex) ((CoglAtlasTexture *) tex)
@ -61,4 +62,7 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
CoglTextureFlags flags, CoglTextureFlags flags,
CoglPixelFormat internal_format); CoglPixelFormat internal_format);
CoglAtlas *
_cogl_atlas_texture_get_atlas (void);
#endif /* __COGL_ATLAS_TEXTURE_H */ #endif /* __COGL_ATLAS_TEXTURE_H */

599
clutter/cogl/cogl/cogl-atlas-texture.c
View File

@ -42,172 +42,93 @@
#include "cogl-rectangle-map.h" #include "cogl-rectangle-map.h"
#include "cogl-journal-private.h" #include "cogl-journal-private.h"
#include "cogl-material-opengl-private.h" #include "cogl-material-opengl-private.h"
#include "cogl-atlas.h"
#include <stdlib.h> #include <stdlib.h>
#ifdef HAVE_COGL_GLES2
#include "../gles/cogl-gles2-wrapper.h"
#else /* HAVE_COGL_GLES2 */
#define glGenFramebuffers ctx->drv.pf_glGenFramebuffers
#define glBindFramebuffer ctx->drv.pf_glBindFramebuffer
#define glFramebufferTexture2D ctx->drv.pf_glFramebufferTexture2D
#define glCheckFramebufferStatus ctx->drv.pf_glCheckFramebufferStatus
#define glDeleteFramebuffers ctx->drv.pf_glDeleteFramebuffers
#endif /* HAVE_COGL_GLES2 */
#ifndef GL_FRAMEBUFFER
#define GL_FRAMEBUFFER 0x8D40
#endif
#ifndef GL_FRAMEBUFFER_BINDING
#define GL_FRAMEBUFFER_BINDING 0x8CA6
#endif
#ifndef GL_COLOR_ATTACHMENT0
#define GL_COLOR_ATTACHMENT0 0x8CE0
#endif
#ifndef GL_FRAMEBUFFER_COMPLETE
#define GL_FRAMEBUFFER_COMPLETE 0x8CD5
#endif
static void _cogl_atlas_texture_free (CoglAtlasTexture *sub_tex); static void _cogl_atlas_texture_free (CoglAtlasTexture *sub_tex);
COGL_TEXTURE_INTERNAL_DEFINE (AtlasTexture, atlas_texture); COGL_TEXTURE_INTERNAL_DEFINE (AtlasTexture, atlas_texture);
static const CoglTextureVtable cogl_atlas_texture_vtable; static const CoglTextureVtable cogl_atlas_texture_vtable;
/* If we want to do mulitple blits from a texture (such as when static CoglHandle
reorganizing the atlas) then it's quicker to download all of the _cogl_atlas_texture_create_sub_texture (CoglHandle full_texture,
data once and upload multiple times from that. This struct is used const CoglRectangleMapEntry *rectangle)
to keep the image data for a series of blits */
typedef struct _CoglAtlasTextureBlitData
{ {
CoglHandle src_tex, dst_tex; /* Create a subtexture for the given rectangle not including the
1-pixel border */
/* If we're using an FBO to blit, then FBO will be non-zero and return _cogl_sub_texture_new (full_texture,
old_fbo will be the previous framebuffer binding */ rectangle->x + 1,
GLuint fbo, old_fbo; rectangle->y + 1,
rectangle->width - 2,
/* If we're not using an FBO then we g_malloc a buffer and copy the rectangle->height - 2);
complete texture data in */
unsigned char *image_data;
CoglPixelFormat format;
int bpp;
unsigned int src_height, src_width;
GLenum dst_gl_target;
} CoglAtlasTextureBlitData;
static void
_cogl_atlas_texture_blit_begin (CoglAtlasTextureBlitData *data,
CoglHandle dst_tex,
CoglHandle src_tex)
{
GLenum src_gl_target;
GLuint src_gl_texture;
GLuint dst_gl_texture;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
data->dst_tex = dst_tex;
data->src_tex = src_tex;
data->fbo = 0;
/* If we can use an FBO then we don't need to download the data and
we can tell GL to blit directly between the textures */
if (cogl_features_available (COGL_FEATURE_OFFSCREEN) &&
!cogl_texture_is_sliced (dst_tex) &&
cogl_texture_get_gl_texture (src_tex, &src_gl_texture, &src_gl_target) &&
cogl_texture_get_gl_texture (dst_tex, &dst_gl_texture,
&data->dst_gl_target))
{
/* Ideally we would use the cogl-offscreen API here, but I'd
rather avoid creating a stencil renderbuffer which you can't
currently do */
/* Preserve the previous framebuffer binding so we don't trample
on cogl-offscreen */
data->old_fbo = 0;
GE( glGetIntegerv (GL_FRAMEBUFFER_BINDING, (GLint *) &data->old_fbo) );
_cogl_texture_set_filters (src_tex, GL_NEAREST, GL_NEAREST);
/* Create an FBO to read from the src texture */
GE( glGenFramebuffers (1, &data->fbo) );
GE( glBindFramebuffer (GL_FRAMEBUFFER, data->fbo) );
GE( glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
src_gl_target, src_gl_texture, 0) );
if (glCheckFramebufferStatus (GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
/* The FBO failed for whatever reason so we'll fallback to
reading the texture data */
GE( glBindFramebuffer (GL_FRAMEBUFFER, data->old_fbo) );
GE( glDeleteFramebuffers (1, &data->fbo) );
data->fbo = 0;
}
_cogl_bind_gl_texture_transient (data->dst_gl_target,
dst_gl_texture,
FALSE);
}
if (data->fbo)
COGL_NOTE (ATLAS, "Blit set up using an FBO");
else
{
/* We need to retrieve the entire texture data (there is no
glGetTexSubImage2D) */
data->format = cogl_texture_get_format (src_tex);
data->bpp = _cogl_get_format_bpp (data->format);
data->src_width = cogl_texture_get_width (src_tex);
data->src_height = cogl_texture_get_height (src_tex);
data->image_data = g_malloc (data->bpp * data->src_width *
data->src_height);
cogl_texture_get_data (src_tex, data->format,
data->src_width * data->bpp, data->image_data);
}
} }
static void static void
_cogl_atlas_texture_blit (CoglAtlasTextureBlitData *data, _cogl_atlas_texture_update_position_cb (gpointer user_data,
unsigned int src_x, CoglHandle new_texture,
unsigned int src_y, const CoglRectangleMapEntry *rectangle)
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{ {
/* If we have an FBO then we can do a fast blit */ CoglAtlasTexture *atlas_tex = user_data;
if (data->fbo)
GE( glCopyTexSubImage2D (data->dst_gl_target, 0, dst_x, dst_y, src_x, src_y, /* Update the sub texture */
width, height) ); if (atlas_tex->sub_texture)
else cogl_handle_unref (atlas_tex->sub_texture);
cogl_texture_set_region (data->dst_tex, atlas_tex->sub_texture =
src_x, src_y, _cogl_atlas_texture_create_sub_texture (new_texture, rectangle);
dst_x, dst_y,
width, height, /* Update the position */
data->src_width, data->src_height, atlas_tex->rectangle = *rectangle;
data->format,
data->src_width * data->bpp,
data->image_data);
} }
static void static void
_cogl_atlas_texture_blit_end (CoglAtlasTextureBlitData *data) _cogl_atlas_texture_reorganize_foreach_cb (const CoglRectangleMapEntry *entry,
void *rectangle_data,
void *user_data)
{ {
_COGL_GET_CONTEXT (ctx, NO_RETVAL); /* Notify cogl-material.c that the texture's underlying GL texture
* storage is changing so it knows it may need to bind a new texture
if (data->fbo) * if the CoglTexture is reused with the same texture unit. */
{ _cogl_material_texture_storage_change_notify (rectangle_data);
GE( glBindFramebuffer (GL_FRAMEBUFFER, data->old_fbo) );
GE( glDeleteFramebuffers (1, &data->fbo) );
} }
else
g_free (data->image_data); static void
_cogl_atlas_texture_reorganize_cb (void *data)
{
CoglAtlas *atlas;
/* We don't know if any materials may currently be referenced in
* the journal that depend on the current underlying GL texture
* storage so we flush the journal before migrating.
*
* We are assuming that texture atlas migration never happens
* during a flush so we don't have to consider recursion here.
*/
_cogl_journal_flush ();
atlas = _cogl_atlas_texture_get_atlas ();
if (atlas->map)
_cogl_rectangle_map_foreach (atlas->map,
_cogl_atlas_texture_reorganize_foreach_cb,
NULL);
}
CoglAtlas *
_cogl_atlas_texture_get_atlas (void)
{
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
if (ctx->atlas == COGL_INVALID_HANDLE)
{
ctx->atlas = _cogl_atlas_new (_cogl_atlas_texture_update_position_cb);
_cogl_atlas_add_reorganize_callback (ctx->atlas,
_cogl_atlas_texture_reorganize_cb,
NULL);
}
return ctx->atlas;
} }
static void static void
@ -252,20 +173,8 @@ _cogl_atlas_texture_remove_from_atlas (CoglAtlasTexture *atlas_tex)
{ {
if (atlas_tex->in_atlas) if (atlas_tex->in_atlas)
{ {
_COGL_GET_CONTEXT (ctx, NO_RETVAL); _cogl_atlas_remove (_cogl_atlas_texture_get_atlas (),
&atlas_tex->rectangle);
_cogl_rectangle_map_remove (ctx->rectangle_map, &atlas_tex->rectangle);
COGL_NOTE (ATLAS, "Removed rectangle sized %ix%i",
atlas_tex->rectangle.width,
atlas_tex->rectangle.height);
COGL_NOTE (ATLAS, "Atlas is %ix%i, has %i textures and is %i%% waste",
_cogl_rectangle_map_get_width (ctx->rectangle_map),
_cogl_rectangle_map_get_height (ctx->rectangle_map),
_cogl_rectangle_map_get_n_rectangles (ctx->rectangle_map),
_cogl_rectangle_map_get_remaining_space (ctx->rectangle_map) *
100 / (_cogl_rectangle_map_get_width (ctx->rectangle_map) *
_cogl_rectangle_map_get_height (ctx->rectangle_map)));
atlas_tex->in_atlas = FALSE; atlas_tex->in_atlas = FALSE;
} }
@ -361,10 +270,6 @@ _cogl_atlas_texture_migrate_out_of_atlas (CoglAtlasTexture *atlas_tex)
/* Make sure this texture is not in the atlas */ /* Make sure this texture is not in the atlas */
if (atlas_tex->in_atlas) if (atlas_tex->in_atlas)
{ {
CoglAtlasTextureBlitData blit_data;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
COGL_NOTE (ATLAS, "Migrating texture out of the atlas"); COGL_NOTE (ATLAS, "Migrating texture out of the atlas");
/* We don't know if any materials may currently be referenced in /* We don't know if any materials may currently be referenced in
@ -383,27 +288,15 @@ _cogl_atlas_texture_migrate_out_of_atlas (CoglAtlasTexture *atlas_tex)
cogl_handle_unref (atlas_tex->sub_texture); cogl_handle_unref (atlas_tex->sub_texture);
/* Create a new texture at the right size, not including the
border */
atlas_tex->sub_texture = atlas_tex->sub_texture =
cogl_texture_new_with_size (atlas_tex->rectangle.width - 2, _cogl_atlas_copy_rectangle (_cogl_atlas_texture_get_atlas (),
atlas_tex->rectangle.x + 1,
atlas_tex->rectangle.y + 1,
atlas_tex->rectangle.width - 2,
atlas_tex->rectangle.height - 2, atlas_tex->rectangle.height - 2,
COGL_TEXTURE_NO_ATLAS, COGL_TEXTURE_NO_ATLAS,
atlas_tex->format); atlas_tex->format);
/* Blit the data out of the atlas to the new texture. If FBOs
aren't available this will end up having to copy the entire
atlas texture */
_cogl_atlas_texture_blit_begin (&blit_data, atlas_tex->sub_texture,
ctx->atlas_texture);
_cogl_atlas_texture_blit (&blit_data,
atlas_tex->rectangle.x + 1,
atlas_tex->rectangle.y + 1,
0, 0,
atlas_tex->rectangle.width - 2,
atlas_tex->rectangle.height - 2);
_cogl_atlas_texture_blit_end (&blit_data);
_cogl_atlas_texture_remove_from_atlas (atlas_tex); _cogl_atlas_texture_remove_from_atlas (atlas_tex);
} }
} }
@ -445,10 +338,10 @@ _cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_tex,
unsigned int dst_height, unsigned int dst_height,
CoglBitmap *bmp) CoglBitmap *bmp)
{ {
_COGL_GET_CONTEXT (ctx, FALSE); CoglAtlas *atlas = _cogl_atlas_texture_get_atlas ();
/* Copy the central data */ /* Copy the central data */
if (!_cogl_texture_set_region_from_bitmap (ctx->atlas_texture, if (!_cogl_texture_set_region_from_bitmap (atlas->texture,
src_x, src_y, src_x, src_y,
dst_x + atlas_tex->rectangle.x + 1, dst_x + atlas_tex->rectangle.x + 1,
dst_y + atlas_tex->rectangle.y + 1, dst_y + atlas_tex->rectangle.y + 1,
@ -459,7 +352,7 @@ _cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_tex,
/* Update the left edge pixels */ /* Update the left edge pixels */
if (dst_x == 0 && if (dst_x == 0 &&
!_cogl_texture_set_region_from_bitmap (ctx->atlas_texture, !_cogl_texture_set_region_from_bitmap (atlas->texture,
src_x, src_y, src_x, src_y,
atlas_tex->rectangle.x, atlas_tex->rectangle.x,
dst_y + atlas_tex->rectangle.y + 1, dst_y + atlas_tex->rectangle.y + 1,
@ -468,7 +361,7 @@ _cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_tex,
return FALSE; return FALSE;
/* Update the right edge pixels */ /* Update the right edge pixels */
if (dst_x + dst_width == atlas_tex->rectangle.width - 2 && if (dst_x + dst_width == atlas_tex->rectangle.width - 2 &&
!_cogl_texture_set_region_from_bitmap (ctx->atlas_texture, !_cogl_texture_set_region_from_bitmap (atlas->texture,
src_x + dst_width - 1, src_y, src_x + dst_width - 1, src_y,
atlas_tex->rectangle.x + atlas_tex->rectangle.x +
atlas_tex->rectangle.width - 1, atlas_tex->rectangle.width - 1,
@ -478,7 +371,7 @@ _cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_tex,
return FALSE; return FALSE;
/* Update the top edge pixels */ /* Update the top edge pixels */
if (dst_y == 0 && if (dst_y == 0 &&
!_cogl_texture_set_region_from_bitmap (ctx->atlas_texture, !_cogl_texture_set_region_from_bitmap (atlas->texture,
src_x, src_y, src_x, src_y,
dst_x + atlas_tex->rectangle.x + 1, dst_x + atlas_tex->rectangle.x + 1,
atlas_tex->rectangle.y, atlas_tex->rectangle.y,
@ -487,7 +380,7 @@ _cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_tex,
return FALSE; return FALSE;
/* Update the bottom edge pixels */ /* Update the bottom edge pixels */
if (dst_y + dst_height == atlas_tex->rectangle.height - 2 && if (dst_y + dst_height == atlas_tex->rectangle.height - 2 &&
!_cogl_texture_set_region_from_bitmap (ctx->atlas_texture, !_cogl_texture_set_region_from_bitmap (atlas->texture,
src_x, src_y + dst_height - 1, src_x, src_y + dst_height - 1,
dst_x + atlas_tex->rectangle.x + 1, dst_x + atlas_tex->rectangle.x + 1,
atlas_tex->rectangle.y + atlas_tex->rectangle.y +
@ -597,319 +490,6 @@ _cogl_atlas_texture_get_height (CoglTexture *tex)
return cogl_texture_get_height (atlas_tex->sub_texture); return cogl_texture_get_height (atlas_tex->sub_texture);
} }
static CoglHandle
_cogl_atlas_texture_create_sub_texture (CoglHandle full_texture,
const CoglRectangleMapEntry *rectangle)
{
/* Create a subtexture for the given rectangle not including the
1-pixel border */
return _cogl_sub_texture_new (full_texture,
rectangle->x + 1,
rectangle->y + 1,
rectangle->width - 2,
rectangle->height - 2);
}
typedef struct _CoglAtlasTextureRepositionData
{
/* The current texture which already has a position */
CoglAtlasTexture *texture;
/* The new position of the texture */
CoglRectangleMapEntry new_position;
} CoglAtlasTextureRepositionData;
static void
_cogl_atlas_texture_migrate (unsigned int n_textures,
CoglAtlasTextureRepositionData *textures,
CoglHandle old_texture,
CoglHandle new_texture,
CoglAtlasTexture *skip_texture)
{
unsigned int i;
CoglAtlasTextureBlitData blit_data;
/* We don't know if any materials may currently be referenced in the
* journal that depend on the current underlying GL texture storage
* so we flush the journal before migrating.
*
* We are assuming that texture atlas migration never happens during
* a flush so we don't have to consider recursion here.
*/
_cogl_journal_flush ();
_cogl_atlas_texture_blit_begin (&blit_data, new_texture, old_texture);
for (i = 0; i < n_textures; i++)
{
/* Notify cogl-material.c that the texture's underlying GL texture
* storage is changing so it knows it may need to bind a new texture
* if the CoglTexture is reused with the same texture unit. */
_cogl_material_texture_storage_change_notify (textures[i].texture);
/* Skip the texture that is being added because it doesn't contain
any data yet */
if (textures[i].texture != skip_texture)
{
_cogl_atlas_texture_blit (&blit_data,
textures[i].texture->rectangle.x,
textures[i].texture->rectangle.y,
textures[i].new_position.x,
textures[i].new_position.y,
textures[i].new_position.width,
textures[i].new_position.height);
/* Update the sub texture */
cogl_handle_unref (textures[i].texture->sub_texture);
textures[i].texture->sub_texture =
_cogl_atlas_texture_create_sub_texture (new_texture,
&textures[i].new_position);
}
/* Update the texture position */
textures[i].texture->rectangle = textures[i].new_position;
}
_cogl_atlas_texture_blit_end (&blit_data);
}
typedef struct _CoglAtlasTextureGetRectanglesData
{
CoglAtlasTextureRepositionData *textures;
/* Number of textures found so far */
unsigned int n_textures;
} CoglAtlasTextureGetRectanglesData;
static void
_cogl_atlas_texture_get_rectangles_cb (const CoglRectangleMapEntry *rectangle,
gpointer rect_data,
gpointer user_data)
{
CoglAtlasTextureGetRectanglesData *data = user_data;
data->textures[data->n_textures++].texture = rect_data;
}
static void
_cogl_atlas_texture_get_next_size (unsigned int *map_width,
unsigned int *map_height)
{
/* Double the size of the texture by increasing whichever dimension
is smaller */
if (*map_width < *map_height)
*map_width <<= 1;
else
*map_height <<= 1;
}
static CoglRectangleMap *
_cogl_atlas_texture_create_map (unsigned int map_width,
unsigned int map_height,
unsigned int n_textures,
CoglAtlasTextureRepositionData *textures)
{
GLint max_texture_size = 1024;
GE( glGetIntegerv (GL_MAX_TEXTURE_SIZE, &max_texture_size) );
/* Sanity check that we're not going to get stuck in an infinite
loop if the maximum texture size has the high bit set */
if ((max_texture_size & (1 << (sizeof (GLint) * 8 - 2))))
max_texture_size >>= 1;
/* Keep trying increasingly larger atlases until we can fit all of
the textures */
while (map_width < max_texture_size && map_height < max_texture_size)
{
CoglRectangleMap *new_atlas = _cogl_rectangle_map_new (map_width,
map_height,
NULL);
unsigned int i;
/* Add all of the textures and keep track of the new position */
for (i = 0; i < n_textures; i++)
if (!_cogl_rectangle_map_add (new_atlas,
textures[i].texture->rectangle.width,
textures[i].texture->rectangle.height,
textures[i].texture,
&textures[i].new_position))
break;
/* If the atlas can contain all of the textures then we have a
winner */
if (i >= n_textures)
return new_atlas;
_cogl_rectangle_map_free (new_atlas);
_cogl_atlas_texture_get_next_size (&map_width, &map_height);
}
/* If we get here then there's no atlas that can accommodate all of
the rectangles */
return NULL;
}
static int
_cogl_atlas_texture_compare_size_cb (const void *a,
const void *b)
{
const CoglAtlasTextureRepositionData *ta = a;
const CoglAtlasTextureRepositionData *tb = b;
unsigned int a_size, b_size;
a_size = ta->texture->rectangle.width * ta->texture->rectangle.height;
b_size = tb->texture->rectangle.width * tb->texture->rectangle.height;
return a_size < b_size ? 1 : a_size > b_size ? -1 : 0;
}
static gboolean
_cogl_atlas_texture_reserve_space (CoglAtlasTexture *new_sub_tex,
unsigned int width,
unsigned int height)
{
CoglAtlasTextureGetRectanglesData data;
CoglRectangleMap *new_map;
CoglHandle new_tex;
unsigned int map_width, map_height;
gboolean ret;
_COGL_GET_CONTEXT (ctx, FALSE);
/* Check if we can fit the rectangle into the existing atlas */
if (ctx->rectangle_map &&
_cogl_rectangle_map_add (ctx->rectangle_map, width, height,
new_sub_tex,
&new_sub_tex->rectangle))
{
COGL_NOTE (ATLAS, "Atlas is %ix%i, has %i textures and is %i%% waste",
_cogl_rectangle_map_get_width (ctx->rectangle_map),
_cogl_rectangle_map_get_height (ctx->rectangle_map),
_cogl_rectangle_map_get_n_rectangles (ctx->rectangle_map),
_cogl_rectangle_map_get_remaining_space (ctx->rectangle_map) *
100 / (_cogl_rectangle_map_get_width (ctx->rectangle_map) *
_cogl_rectangle_map_get_height (ctx->rectangle_map)));
return TRUE;
}
/* We need to reorganise the atlas so we'll get an array of all the
textures currently in the atlas. */
data.n_textures = 0;
if (ctx->rectangle_map == NULL)
data.textures = g_malloc (sizeof (CoglAtlasTextureRepositionData));
else
{
unsigned int n_rectangles =
_cogl_rectangle_map_get_n_rectangles (ctx->rectangle_map);
data.textures = g_malloc (sizeof (CoglAtlasTextureRepositionData) *
(n_rectangles + 1));
_cogl_rectangle_map_foreach (ctx->rectangle_map,
_cogl_atlas_texture_get_rectangles_cb,
&data);
}
/* Add the new rectangle as a dummy texture so that it can be
positioned with the rest */
data.textures[data.n_textures++].texture = new_sub_tex;
/* The atlasing algorithm works a lot better if the rectangles are
added in decreasing order of size so we'll first sort the
array */
qsort (data.textures, data.n_textures,
sizeof (CoglAtlasTextureRepositionData),
_cogl_atlas_texture_compare_size_cb);
/* Try to create a new atlas that can contain all of the textures */
if (ctx->rectangle_map)
{
map_width = _cogl_rectangle_map_get_width (ctx->rectangle_map);
map_height = _cogl_rectangle_map_get_height (ctx->rectangle_map);
/* If there is enough space in the existing for the new
rectangle in the existing atlas we'll start with the same
size, otherwise we'll immediately double it */
if (_cogl_rectangle_map_get_remaining_space (ctx->rectangle_map) <
width * height)
_cogl_atlas_texture_get_next_size (&map_width, &map_height);
}
else
{
/* Start with an initial size of 256x256 */
map_width = 256;
map_height = 256;
}
new_map = _cogl_atlas_texture_create_map (map_width, map_height,
data.n_textures, data.textures);
map_width = _cogl_rectangle_map_get_width (new_map);
map_height = _cogl_rectangle_map_get_height (new_map);
/* If we can't create a map with the texture then give up */
if (new_map == NULL)
{
COGL_NOTE (ATLAS, "Could not fit texture in the atlas");
ret = FALSE;
}
/* We need to migrate the existing textures into a new texture */
else if ((new_tex =
_cogl_texture_2d_new_with_size (map_width, map_height,
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_RGBA_8888)) ==
COGL_INVALID_HANDLE)
{
COGL_NOTE (ATLAS, "Could not create a CoglTexture2D");
_cogl_rectangle_map_free (new_map);
ret = FALSE;
}
else
{
COGL_NOTE (ATLAS,
"Atlas %s with size %ix%i",
ctx->rectangle_map == NULL ||
_cogl_rectangle_map_get_width (ctx->rectangle_map) !=
_cogl_rectangle_map_get_width (new_map) ||
_cogl_rectangle_map_get_height (ctx->rectangle_map) !=
_cogl_rectangle_map_get_height (new_map) ?
"resized" : "reorganized",
_cogl_rectangle_map_get_width (new_map),
_cogl_rectangle_map_get_height (new_map));
if (ctx->rectangle_map)
{
/* Move all the textures to the right position in the new
texture. This will also update the texture's rectangle */
_cogl_atlas_texture_migrate (data.n_textures,
data.textures,
ctx->atlas_texture,
new_tex,
new_sub_tex);
_cogl_rectangle_map_free (ctx->rectangle_map);
cogl_handle_unref (ctx->atlas_texture);
}
else
/* We know there's only one texture so we can just directly
update the rectangle from its new position */
data.textures[0].texture->rectangle = data.textures[0].new_position;
ctx->rectangle_map = new_map;
ctx->atlas_texture = new_tex;
COGL_NOTE (ATLAS, "Atlas is %ix%i, has %i textures and is %i%% waste",
_cogl_rectangle_map_get_width (ctx->rectangle_map),
_cogl_rectangle_map_get_height (ctx->rectangle_map),
_cogl_rectangle_map_get_n_rectangles (ctx->rectangle_map),
_cogl_rectangle_map_get_remaining_space (ctx->rectangle_map) *
100 / (_cogl_rectangle_map_get_width (ctx->rectangle_map) *
_cogl_rectangle_map_get_height (ctx->rectangle_map)));
ret = TRUE;
}
g_free (data.textures);
return ret;
}
static gboolean static gboolean
_cogl_atlas_texture_can_use_format (CoglPixelFormat format) _cogl_atlas_texture_can_use_format (CoglPixelFormat format)
{ {
@ -987,15 +567,14 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
/* We need to allocate the texture now because we need the pointer /* We need to allocate the texture now because we need the pointer
to set as the data for the rectangle in the atlas */ to set as the data for the rectangle in the atlas */
atlas_tex = g_new (CoglAtlasTexture, 1); atlas_tex = g_new (CoglAtlasTexture, 1);
/* We need to fill in the texture size now because it is used in the
reserve_space function below. We add two pixels for the border */ atlas_tex->sub_texture = COGL_INVALID_HANDLE;
atlas_tex->rectangle.width = bmp_width + 2;
atlas_tex->rectangle.height = bmp_height + 2;
/* Try to make some space in the atlas for the texture */ /* Try to make some space in the atlas for the texture */
if (!_cogl_atlas_texture_reserve_space (atlas_tex, if (!_cogl_atlas_reserve_space (_cogl_atlas_texture_get_atlas (),
atlas_tex->rectangle.width, /* Add two pixels for the border */
atlas_tex->rectangle.height)) bmp_width + 2, bmp_height + 2,
atlas_tex))
{ {
g_free (atlas_tex); g_free (atlas_tex);
return COGL_INVALID_HANDLE; return COGL_INVALID_HANDLE;
@ -1010,7 +589,8 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
if (dst_bmp == NULL) if (dst_bmp == NULL)
{ {
_cogl_rectangle_map_remove (ctx->rectangle_map, &atlas_tex->rectangle); _cogl_atlas_remove (_cogl_atlas_texture_get_atlas (),
&atlas_tex->rectangle);
g_free (atlas_tex); g_free (atlas_tex);
return COGL_INVALID_HANDLE; return COGL_INVALID_HANDLE;
} }
@ -1018,9 +598,6 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
atlas_tex->_parent.vtable = &cogl_atlas_texture_vtable; atlas_tex->_parent.vtable = &cogl_atlas_texture_vtable;
atlas_tex->format = internal_format; atlas_tex->format = internal_format;
atlas_tex->in_atlas = TRUE; atlas_tex->in_atlas = TRUE;
atlas_tex->sub_texture =
_cogl_atlas_texture_create_sub_texture (ctx->atlas_texture,
&atlas_tex->rectangle);
/* Make another bitmap so that we can override the format */ /* Make another bitmap so that we can override the format */
override_bmp = _cogl_bitmap_new_shared (dst_bmp, override_bmp = _cogl_bitmap_new_shared (dst_bmp,

596
clutter/cogl/cogl/cogl-atlas.c Normal file
View File

@ -0,0 +1,596 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-atlas.h"
#include "cogl-rectangle-map.h"
#include "cogl-context.h"
#include "cogl-texture-private.h"
#include "cogl-texture-2d-private.h"
#include "cogl-material-opengl-private.h"
#include "cogl-debug.h"
#include <stdlib.h>
#ifdef HAVE_COGL_GLES2
#include "../gles/cogl-gles2-wrapper.h"
#else /* HAVE_COGL_GLES2 */
#define glGenFramebuffers ctx->drv.pf_glGenFramebuffers
#define glBindFramebuffer ctx->drv.pf_glBindFramebuffer
#define glFramebufferTexture2D ctx->drv.pf_glFramebufferTexture2D
#define glCheckFramebufferStatus ctx->drv.pf_glCheckFramebufferStatus
#define glDeleteFramebuffers ctx->drv.pf_glDeleteFramebuffers
#endif /* HAVE_COGL_GLES2 */
#ifndef GL_FRAMEBUFFER
#define GL_FRAMEBUFFER 0x8D40
#endif
#ifndef GL_FRAMEBUFFER_BINDING
#define GL_FRAMEBUFFER_BINDING 0x8CA6
#endif
#ifndef GL_COLOR_ATTACHMENT0
#define GL_COLOR_ATTACHMENT0 0x8CE0
#endif
#ifndef GL_FRAMEBUFFER_COMPLETE
#define GL_FRAMEBUFFER_COMPLETE 0x8CD5
#endif
/* If we want to do mulitple blits from a texture (such as when
reorganizing the atlas) then it's quicker to download all of the
data once and upload multiple times from that. This struct is used
to keep the image data for a series of blits */
typedef struct _CoglAtlasBlitData
{
CoglHandle src_tex, dst_tex;
/* If we're using an FBO to blit, then FBO will be non-zero and
old_fbo will be the previous framebuffer binding */
GLuint fbo, old_fbo;
/* If we're not using an FBO then we g_malloc a buffer and copy the
complete texture data in */
unsigned char *image_data;
CoglPixelFormat format;
int bpp;
unsigned int src_height, src_width;
GLenum dst_gl_target;
} CoglAtlasBlitData;
static void
_cogl_atlas_blit_begin (CoglAtlasBlitData *data,
CoglHandle dst_tex,
CoglHandle src_tex)
{
GLenum src_gl_target;
GLuint src_gl_texture;
GLuint dst_gl_texture;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
data->dst_tex = dst_tex;
data->src_tex = src_tex;
data->fbo = 0;
/* If we can use an FBO then we don't need to download the data and
we can tell GL to blit directly between the textures */
if (cogl_features_available (COGL_FEATURE_OFFSCREEN) &&
!cogl_texture_is_sliced (dst_tex) &&
cogl_texture_get_gl_texture (src_tex, &src_gl_texture, &src_gl_target) &&
cogl_texture_get_gl_texture (dst_tex, &dst_gl_texture,
&data->dst_gl_target))
{
/* Ideally we would use the cogl-offscreen API here, but I'd
rather avoid creating a stencil renderbuffer which you can't
currently do */
/* Preserve the previous framebuffer binding so we don't trample
on cogl-offscreen */
data->old_fbo = 0;
GE( glGetIntegerv (GL_FRAMEBUFFER_BINDING, (GLint *) &data->old_fbo) );
_cogl_texture_set_filters (src_tex, GL_NEAREST, GL_NEAREST);
/* Create an FBO to read from the src texture */
GE( glGenFramebuffers (1, &data->fbo) );
GE( glBindFramebuffer (GL_FRAMEBUFFER, data->fbo) );
GE( glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
src_gl_target, src_gl_texture, 0) );
if (glCheckFramebufferStatus (GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
/* The FBO failed for whatever reason so we'll fallback to
reading the texture data */
GE( glBindFramebuffer (GL_FRAMEBUFFER, data->old_fbo) );
GE( glDeleteFramebuffers (1, &data->fbo) );
data->fbo = 0;
}
_cogl_bind_gl_texture_transient (data->dst_gl_target,
dst_gl_texture,
FALSE);
}
if (data->fbo)
COGL_NOTE (ATLAS, "Blit set up using an FBO");
else
{
/* We need to retrieve the entire texture data (there is no
glGetTexSubImage2D) */
data->format = cogl_texture_get_format (src_tex);
data->bpp = _cogl_get_format_bpp (data->format);
data->src_width = cogl_texture_get_width (src_tex);
data->src_height = cogl_texture_get_height (src_tex);
data->image_data = g_malloc (data->bpp * data->src_width *
data->src_height);
cogl_texture_get_data (src_tex, data->format,
data->src_width * data->bpp, data->image_data);
}
}
static void
_cogl_atlas_blit (CoglAtlasBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
/* If we have an FBO then we can do a fast blit */
if (data->fbo)
GE( glCopyTexSubImage2D (data->dst_gl_target, 0, dst_x, dst_y, src_x, src_y,
width, height) );
else
cogl_texture_set_region (data->dst_tex,
src_x, src_y,
dst_x, dst_y,
width, height,
data->src_width, data->src_height,
data->format,
data->src_width * data->bpp,
data->image_data);
}
static void
_cogl_atlas_blit_end (CoglAtlasBlitData *data)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (data->fbo)
{
GE( glBindFramebuffer (GL_FRAMEBUFFER, data->old_fbo) );
GE( glDeleteFramebuffers (1, &data->fbo) );
}
else
g_free (data->image_data);
}
CoglAtlas *
_cogl_atlas_new (CoglAtlasUpdatePositionCallback update_position_cb)
{
CoglAtlas *atlas = g_new (CoglAtlas, 1);
atlas->update_position_cb = update_position_cb;
atlas->map = NULL;
atlas->texture = NULL;
_cogl_callback_list_init (&atlas->reorganize_callbacks);
return atlas;
}
void
_cogl_atlas_free (CoglAtlas *atlas)
{
if (atlas->texture)
cogl_handle_unref (atlas->texture);
if (atlas->map)
_cogl_rectangle_map_free (atlas->map);
_cogl_callback_list_destroy (&atlas->reorganize_callbacks);
g_free (atlas);
}
typedef struct _CoglAtlasRepositionData
{
/* The current user data for this texture */
void *user_data;
/* The old and new positions of the texture */
CoglRectangleMapEntry old_position;
CoglRectangleMapEntry new_position;
} CoglAtlasRepositionData;
static void
_cogl_atlas_migrate (CoglAtlas *atlas,
unsigned int n_textures,
CoglAtlasRepositionData *textures,
CoglHandle old_texture,
CoglHandle new_texture,
void *skip_user_data)
{
unsigned int i;
CoglAtlasBlitData blit_data;
_cogl_atlas_blit_begin (&blit_data, new_texture, old_texture);
for (i = 0; i < n_textures; i++)
{
/* Skip the texture that is being added because it doesn't contain
any data yet */
if (textures[i].user_data != skip_user_data)
{
_cogl_atlas_blit (&blit_data,
textures[i].old_position.x,
textures[i].old_position.y,
textures[i].new_position.x,
textures[i].new_position.y,
textures[i].new_position.width,
textures[i].new_position.height);
}
/* Update the texture position */
atlas->update_position_cb (textures[i].user_data,
new_texture,
&textures[i].new_position);
}
_cogl_atlas_blit_end (&blit_data);
}
typedef struct _CoglAtlasGetRectanglesData
{
CoglAtlasRepositionData *textures;
/* Number of textures found so far */
unsigned int n_textures;
} CoglAtlasGetRectanglesData;
static void
_cogl_atlas_get_rectangles_cb (const CoglRectangleMapEntry *rectangle,
void *rect_data,
void *user_data)
{
CoglAtlasGetRectanglesData *data = user_data;
data->textures[data->n_textures].old_position = *rectangle;
data->textures[data->n_textures++].user_data = rect_data;
}
static void
_cogl_atlas_get_next_size (unsigned int *map_width,
unsigned int *map_height)
{
/* Double the size of the texture by increasing whichever dimension
is smaller */
if (*map_width < *map_height)
*map_width <<= 1;
else
*map_height <<= 1;
}
static CoglRectangleMap *
_cogl_atlas_create_map (unsigned int map_width,
unsigned int map_height,
unsigned int n_textures,
CoglAtlasRepositionData *textures)
{
GLint max_texture_size = 1024;
GE( glGetIntegerv (GL_MAX_TEXTURE_SIZE, &max_texture_size) );
/* Sanity check that we're not going to get stuck in an infinite
loop if the maximum texture size has the high bit set */
if ((max_texture_size & (1 << (sizeof (GLint) * 8 - 2))))
max_texture_size >>= 1;
/* Keep trying increasingly larger atlases until we can fit all of
the textures */
while (map_width < max_texture_size && map_height < max_texture_size)
{
CoglRectangleMap *new_atlas = _cogl_rectangle_map_new (map_width,
map_height,
NULL);
unsigned int i;
/* Add all of the textures and keep track of the new position */
for (i = 0; i < n_textures; i++)
if (!_cogl_rectangle_map_add (new_atlas,
textures[i].old_position.width,
textures[i].old_position.height,
textures[i].user_data,
&textures[i].new_position))
break;
/* If the atlas can contain all of the textures then we have a
winner */
if (i >= n_textures)
return new_atlas;
_cogl_rectangle_map_free (new_atlas);
_cogl_atlas_get_next_size (&map_width, &map_height);
}
/* If we get here then there's no atlas that can accommodate all of
the rectangles */
return NULL;
}
static int
_cogl_atlas_compare_size_cb (const void *a,
const void *b)
{
const CoglAtlasRepositionData *ta = a;
const CoglAtlasRepositionData *tb = b;
unsigned int a_size, b_size;
a_size = ta->old_position.width * ta->old_position.height;
b_size = tb->old_position.width * tb->old_position.height;
return a_size < b_size ? 1 : a_size > b_size ? -1 : 0;
}
static void
_cogl_atlas_notify_reorganize (CoglAtlas *atlas)
{
_cogl_callback_list_invoke (&atlas->reorganize_callbacks);
}
gboolean
_cogl_atlas_reserve_space (CoglAtlas *atlas,
unsigned int width,
unsigned int height,
void *user_data)
{
CoglAtlasGetRectanglesData data;
CoglRectangleMap *new_map;
CoglHandle new_tex;
unsigned int map_width, map_height;
gboolean ret;
CoglRectangleMapEntry new_position;
/* Check if we can fit the rectangle into the existing map */
if (atlas->map &&
_cogl_rectangle_map_add (atlas->map, width, height,
user_data,
&new_position))
{
int waste =
_cogl_rectangle_map_get_remaining_space (atlas->map) *
100 / (_cogl_rectangle_map_get_width (atlas->map) *
_cogl_rectangle_map_get_height (atlas->map));
COGL_NOTE (ATLAS, "Atlas is %ix%i, has %i textures and is %i%% waste",
_cogl_rectangle_map_get_width (atlas->map),
_cogl_rectangle_map_get_height (atlas->map),
_cogl_rectangle_map_get_n_rectangles (atlas->map),
waste);
atlas->update_position_cb (user_data,
atlas->texture,
&new_position);
return TRUE;
}
/* We need to reorganise the atlas so we'll get an array of all the
textures currently in the atlas. */
data.n_textures = 0;
if (atlas->map == NULL)
data.textures = g_malloc (sizeof (CoglAtlasRepositionData));
else
{
unsigned int n_rectangles =
_cogl_rectangle_map_get_n_rectangles (atlas->map);
data.textures = g_malloc (sizeof (CoglAtlasRepositionData) *
(n_rectangles + 1));
_cogl_rectangle_map_foreach (atlas->map,
_cogl_atlas_get_rectangles_cb,
&data);
}
/* Add the new rectangle as a dummy texture so that it can be
positioned with the rest */
data.textures[data.n_textures].old_position.x = 0;
data.textures[data.n_textures].old_position.y = 0;
data.textures[data.n_textures].old_position.width = width;
data.textures[data.n_textures].old_position.height = height;
data.textures[data.n_textures++].user_data = user_data;
/* The atlasing algorithm works a lot better if the rectangles are
added in decreasing order of size so we'll first sort the
array */
qsort (data.textures, data.n_textures,
sizeof (CoglAtlasRepositionData),
_cogl_atlas_compare_size_cb);
/* Try to create a new atlas that can contain all of the textures */
if (atlas->map)
{
map_width = _cogl_rectangle_map_get_width (atlas->map);
map_height = _cogl_rectangle_map_get_height (atlas->map);
/* If there is enough space in the existing for the new
rectangle in the existing atlas we'll start with the same
size, otherwise we'll immediately double it */
if (_cogl_rectangle_map_get_remaining_space (atlas->map) <
width * height)
_cogl_atlas_get_next_size (&map_width, &map_height);
}
else
{
/* Start with an initial size of 256x256 */
map_width = 256;
map_height = 256;
}
new_map = _cogl_atlas_create_map (map_width, map_height,
data.n_textures, data.textures);
/* If we can't create a map with the texture then give up */
if (new_map == NULL)
{
COGL_NOTE (ATLAS, "Could not fit texture in the atlas");
ret = FALSE;
}
/* We need to migrate the existing textures into a new texture */
else if ((new_tex = _cogl_texture_2d_new_with_size
(_cogl_rectangle_map_get_width (new_map),
_cogl_rectangle_map_get_height (new_map),
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_RGBA_8888)) == COGL_INVALID_HANDLE)
{
COGL_NOTE (ATLAS, "Could not create a CoglTexture2D");
_cogl_rectangle_map_free (new_map);
ret = FALSE;
}
else
{
int waste;
_cogl_atlas_notify_reorganize (atlas);
COGL_NOTE (ATLAS,
"Atlas %s with size %ix%i",
atlas->map == NULL ||
_cogl_rectangle_map_get_width (atlas->map) !=
_cogl_rectangle_map_get_width (new_map) ||
_cogl_rectangle_map_get_height (atlas->map) !=
_cogl_rectangle_map_get_height (new_map) ?
"resized" : "reorganized",
_cogl_rectangle_map_get_width (new_map),
_cogl_rectangle_map_get_height (new_map));
if (atlas->map)
{
/* Move all the textures to the right position in the new
texture. This will also update the texture's rectangle */
_cogl_atlas_migrate (atlas,
data.n_textures,
data.textures,
atlas->texture,
new_tex,
user_data);
_cogl_rectangle_map_free (atlas->map);
cogl_handle_unref (atlas->texture);
}
else
/* We know there's only one texture so we can just directly
update the rectangle from its new position */
atlas->update_position_cb (data.textures[0].user_data,
new_tex,
&data.textures[0].new_position);
atlas->map = new_map;
atlas->texture = new_tex;
waste = (_cogl_rectangle_map_get_remaining_space (atlas->map) *
100 / (_cogl_rectangle_map_get_width (atlas->map) *
_cogl_rectangle_map_get_height (atlas->map)));
COGL_NOTE (ATLAS, "Atlas is %ix%i, has %i textures and is %i%% waste",
_cogl_rectangle_map_get_width (atlas->map),
_cogl_rectangle_map_get_height (atlas->map),
_cogl_rectangle_map_get_n_rectangles (atlas->map),
waste);
ret = TRUE;
}
g_free (data.textures);
return ret;
}
void
_cogl_atlas_remove (CoglAtlas *atlas,
const CoglRectangleMapEntry *rectangle)
{
_cogl_rectangle_map_remove (atlas->map, rectangle);
COGL_NOTE (ATLAS, "Removed rectangle sized %ix%i",
rectangle->width,
rectangle->height);
COGL_NOTE (ATLAS, "Atlas is %ix%i, has %i textures and is %i%% waste",
_cogl_rectangle_map_get_width (atlas->map),
_cogl_rectangle_map_get_height (atlas->map),
_cogl_rectangle_map_get_n_rectangles (atlas->map),
_cogl_rectangle_map_get_remaining_space (atlas->map) *
100 / (_cogl_rectangle_map_get_width (atlas->map) *
_cogl_rectangle_map_get_height (atlas->map)));
};
CoglHandle
_cogl_atlas_copy_rectangle (CoglAtlas *atlas,
unsigned int x,
unsigned int y,
unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat format)
{
CoglHandle tex;
CoglAtlasBlitData blit_data;
/* Create a new texture at the right size */
tex = cogl_texture_new_with_size (width, height, flags, format);
/* Blit the data out of the atlas to the new texture. If FBOs
aren't available this will end up having to copy the entire
atlas texture */
_cogl_atlas_blit_begin (&blit_data, tex, atlas->texture);
_cogl_atlas_blit (&blit_data,
x, y,
0, 0,
width, height);
_cogl_atlas_blit_end (&blit_data);
return tex;
}
void
_cogl_atlas_add_reorganize_callback (CoglAtlas *atlas,
CoglCallbackListFunc callback,
void *user_data)
{
_cogl_callback_list_add (&atlas->reorganize_callbacks, callback, user_data);
}
void
_cogl_atlas_remove_reorganize_callback (CoglAtlas *atlas,
CoglCallbackListFunc callback,
void *user_data)
{
_cogl_callback_list_remove (&atlas->reorganize_callbacks,
callback, user_data);
}

86
clutter/cogl/cogl/cogl-atlas.h Normal file
View File

@ -0,0 +1,86 @@
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __COGL_ATLAS_H
#define __COGL_ATLAS_H
#include "cogl-rectangle-map.h"
#include "cogl-callback-list.h"
typedef void
(* CoglAtlasUpdatePositionCallback) (void *user_data,
CoglHandle new_texture,
const CoglRectangleMapEntry *rect);
typedef struct _CoglAtlas CoglAtlas;
struct _CoglAtlas
{
CoglRectangleMap *map;
CoglHandle texture;
CoglAtlasUpdatePositionCallback update_position_cb;
CoglCallbackList reorganize_callbacks;
};
CoglAtlas *
_cogl_atlas_new (CoglAtlasUpdatePositionCallback update_position_cb);
gboolean
_cogl_atlas_reserve_space (CoglAtlas *atlas,
unsigned int width,
unsigned int height,
void *user_data);
void
_cogl_atlas_remove (CoglAtlas *atlas,
const CoglRectangleMapEntry *rectangle);
void
_cogl_atlas_free (CoglAtlas *atlas);
CoglHandle
_cogl_atlas_copy_rectangle (CoglAtlas *atlas,
unsigned int x,
unsigned int y,
unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat format);
CoglAtlas *
_cogl_atlas_get_default (void);
void
_cogl_atlas_add_reorganize_callback (CoglAtlas *atlas,
CoglCallbackListFunc callback,
void *user_data);
void
_cogl_atlas_remove_reorganize_callback (CoglAtlas *atlas,
CoglCallbackListFunc callback,
void *user_data);
#endif /* __COGL_ATLAS_H */

10
clutter/cogl/cogl/cogl-context.c
View File

@ -214,8 +214,7 @@ cogl_create_context (void)
_cogl_enable (enable_flags); _cogl_enable (enable_flags);
_cogl_flush_face_winding (); _cogl_flush_face_winding ();
_context->rectangle_map = NULL; _context->atlas = NULL;
_context->atlas_texture = COGL_INVALID_HANDLE;
/* As far as I can tell, GL_POINT_SPRITE doesn't have any effect /* As far as I can tell, GL_POINT_SPRITE doesn't have any effect
unless GL_COORD_REPLACE is enabled for an individual unless GL_COORD_REPLACE is enabled for an individual
@ -273,11 +272,8 @@ _cogl_destroy_context (void)
if (_context->default_layer_0) if (_context->default_layer_0)
cogl_handle_unref (_context->default_layer_0); cogl_handle_unref (_context->default_layer_0);
if (_context->rectangle_map) if (_context->atlas)
_cogl_rectangle_map_free (_context->rectangle_map); _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->texcoord_arrays_enabled);
_cogl_bitmask_destroy (&_context->temp_bitmask); _cogl_bitmask_destroy (&_context->temp_bitmask);

5
clutter/cogl/cogl/cogl-context.h
View File

@ -31,9 +31,9 @@
#include "cogl-clip-stack.h" #include "cogl-clip-stack.h"
#include "cogl-matrix-stack.h" #include "cogl-matrix-stack.h"
#include "cogl-material-private.h" #include "cogl-material-private.h"
#include "cogl-rectangle-map.h"
#include "cogl-buffer-private.h" #include "cogl-buffer-private.h"
#include "cogl-bitmask.h" #include "cogl-bitmask.h"
#include "cogl-atlas.h"
typedef struct typedef struct
{ {
@ -143,8 +143,7 @@ typedef struct
CoglMaterial *texture_download_material; CoglMaterial *texture_download_material;
CoglRectangleMap *rectangle_map; CoglAtlas *atlas;
CoglHandle atlas_texture;
/* This debugging variable is used to pick a colour for visually /* This debugging variable is used to pick a colour for visually
displaying the quad batches. It needs to be global so that it can displaying the quad batches. It needs to be global so that it can