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texture: Call _cogl_texture_prepare_for_upload in set_region impl

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Instead of calling _cogl_texutre_prepare_for_upload in
cogl_texture_set_region_from_bitmap the call is now deferred to the
implementation of the virtual for set_region. This is needed if the
texture backend is using a different format for the actual GL texture
than what is reported by cogl_texture_get_format. This happens for
example with atlas textures which report the original internal format
specified when the texture was created but actually always store the
data in an RGBA texture.

Also when creating an atlas texture from a bitmap it was preparing the
bitmap to be uploaded to the original format instead of the format of
the actual texture used for the atlas. Then it was using
cogl_texture_set_region_from_bitmap to upload the 5 pieces to make the
copies of the edge pixels. This would end up converting the image to
the actual format 5 times. The atlas textures have now been changed to
prepare the bitmap for the right format.

https://bugzilla.gnome.org/show_bug.cgi?id=657840

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2011-08-31 17:22:20 +01:00 committed by Robert Bragg
parent 5ac563afdb
commit 503f138fb6
6 changed files with 87 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
cogl/cogl-atlas-texture.c
View File

@ -488,6 +488,52 @@ _cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_tex,
return TRUE;
}
static CoglBitmap *
_cogl_atlas_texture_prepare_for_upload (CoglAtlasTexture *atlas_tex,
CoglBitmap *bmp)
{
CoglPixelFormat internal_format;
CoglBitmap *converted_bmp;
CoglBitmap *override_bmp;
/* We'll prepare to upload using the format of the actual texture of
the atlas texture instead of the format reported by
cogl_texture_get_format which would be the original internal
format specified when the texture was created. However we'll
preserve the premult status of the internal format because the
images are all stored in the original premult format of the
orignal format so we do need to trigger the conversion */
internal_format = (COGL_PIXEL_FORMAT_RGBA_8888 |
(atlas_tex->format & COGL_PREMULT_BIT));
converted_bmp = _cogl_texture_prepare_for_upload (bmp,
internal_format,
NULL, /* dst_format_out */
NULL, /* glintformat */
NULL, /* glformat */
NULL /* gltype */);
if (converted_bmp == NULL)
return NULL;
/* We'll create another bitmap which uses the same data but
overrides the format to remove the premult flag so that uploads
to the atlas texture won't trigger the conversion again */
override_bmp =
_cogl_bitmap_new_shared (converted_bmp,
_cogl_bitmap_get_format (converted_bmp) &
~COGL_PREMULT_BIT,
_cogl_bitmap_get_width (converted_bmp),
_cogl_bitmap_get_height (converted_bmp),
_cogl_bitmap_get_rowstride (converted_bmp));
cogl_object_unref (converted_bmp);
return override_bmp;
}
static gboolean
_cogl_atlas_texture_set_region (CoglTexture *tex,
int src_x,
@ -506,12 +552,8 @@ _cogl_atlas_texture_set_region (CoglTexture *tex,
{
gboolean ret;
bmp = _cogl_bitmap_new_shared (bmp,
_cogl_bitmap_get_format (bmp) &
~COGL_PREMULT_BIT,
_cogl_bitmap_get_width (bmp),
_cogl_bitmap_get_height (bmp),
_cogl_bitmap_get_rowstride (bmp));
bmp = _cogl_atlas_texture_prepare_for_upload (atlas_tex,
bmp);
/* Upload the data ignoring the premult bit */
ret = _cogl_atlas_texture_set_region_with_border (atlas_tex,
@ -684,10 +726,6 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
CoglHandle atlas_tex_handle;
CoglAtlasTexture *atlas_tex;
CoglBitmap *dst_bmp;
CoglBitmap *override_bmp;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
int bmp_width;
int bmp_height;
CoglPixelFormat bmp_format;
@ -711,12 +749,8 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
atlas_tex = atlas_tex_handle;
dst_bmp = _cogl_texture_prepare_for_upload (bmp,
internal_format,
&internal_format,
&gl_intformat,
&gl_format,
&gl_type);
dst_bmp = _cogl_atlas_texture_prepare_for_upload (atlas_tex,
bmp);
if (dst_bmp == NULL)
{
@ -724,19 +758,8 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
return COGL_INVALID_HANDLE;
}
/* Make another bitmap so that we can override the format */
override_bmp = _cogl_bitmap_new_shared (dst_bmp,
_cogl_bitmap_get_format (dst_bmp) &
~COGL_PREMULT_BIT,
_cogl_bitmap_get_width (dst_bmp),
_cogl_bitmap_get_height (dst_bmp),
_cogl_bitmap_get_rowstride (dst_bmp));
cogl_object_unref (dst_bmp);
/* Defer to set_region so that we can share the code for copying the
edge pixels to the border. We don't want to pass the actual
format of the converted texture because otherwise it will get
unpremultiplied. */
edge pixels to the border. */
_cogl_atlas_texture_set_region_with_border (atlas_tex,
0, /* src_x */
0, /* src_y */
@ -744,9 +767,9 @@ _cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
0, /* dst_y */
bmp_width, /* dst_width */
bmp_height, /* dst_height */
override_bmp);
dst_bmp);
cogl_object_unref (override_bmp);
cogl_object_unref (dst_bmp);
return atlas_tex_handle;
}

12
cogl/cogl-texture-2d-sliced.c
View File

@ -1325,10 +1325,12 @@ _cogl_texture_2d_sliced_set_region (CoglTexture *tex,
_COGL_GET_CONTEXT (ctx, FALSE);
ctx->texture_driver->pixel_format_to_gl (_cogl_bitmap_get_format (bmp),
NULL, /* internal format */
&gl_format,
&gl_type);
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (tex),
NULL,
NULL,
&gl_format,
&gl_type);
/* Send data to GL */
_cogl_texture_2d_sliced_upload_subregion_to_gl (tex_2ds,
@ -1339,6 +1341,8 @@ _cogl_texture_2d_sliced_set_region (CoglTexture *tex,
gl_format,
gl_type);
cogl_object_unref (bmp);
return TRUE;
}

12
cogl/cogl-texture-2d.c
View File

@ -816,10 +816,12 @@ _cogl_texture_2d_set_region (CoglTexture *tex,
_COGL_GET_CONTEXT (ctx, FALSE);
ctx->texture_driver->pixel_format_to_gl (_cogl_bitmap_get_format (bmp),
NULL, /* internal format */
&gl_format,
&gl_type);
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (tex),
NULL,
NULL,
&gl_format,
&gl_type);
/* If this touches the first pixel then we'll update our copy */
if (dst_x == 0 && dst_y == 0 &&
@ -850,6 +852,8 @@ _cogl_texture_2d_set_region (CoglTexture *tex,
tex_2d->mipmaps_dirty = TRUE;
cogl_object_unref (bmp);
return TRUE;
}

6
cogl/cogl-texture-private.h
View File

@ -67,8 +67,10 @@ struct _CoglTextureVtable
backend */
/* This should update the specified sub region of the texture with a
sub region of the given bitmap. The bitmap will have first been
converted to a suitable format for uploading if neccessary. */
sub region of the given bitmap. The bitmap is not converted
before being passed so the implementation is expected to call
_cogl_texture_prepare_for_upload with a suitable destination
format before uploading */
gboolean (* set_region) (CoglTexture *tex,
int src_x,
int src_y,

12
cogl/cogl-texture-rectangle.c
View File

@ -564,10 +564,12 @@ _cogl_texture_rectangle_set_region (CoglTexture *tex,
_COGL_GET_CONTEXT (ctx, FALSE);
ctx->texture_driver->pixel_format_to_gl (_cogl_bitmap_get_format (bmp),
NULL, /* internal format */
&gl_format,
&gl_type);
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (tex),
NULL,
NULL,
&gl_format,
&gl_type);
/* Send data to GL */
ctx->texture_driver->upload_subregion_to_gl (GL_TEXTURE_RECTANGLE_ARB,
@ -580,6 +582,8 @@ _cogl_texture_rectangle_set_region (CoglTexture *tex,
gl_format,
gl_type);
cogl_object_unref (bmp);
return TRUE;
}

18
cogl/cogl-texture.c
View File

@ -862,22 +862,18 @@ cogl_texture_set_region_from_bitmap (CoglHandle handle,
CoglBitmap *bmp)
{
CoglTexture *tex = COGL_TEXTURE (handle);
GLenum closest_gl_format;
GLenum closest_gl_type;
gboolean ret;
/* Shortcut out early if the image is empty */
if (dst_width == 0 || dst_height == 0)
return TRUE;
/* Prepare the bitmap so that it will do the premultiplication
conversion */
bmp = _cogl_texture_prepare_for_upload (bmp,
cogl_texture_get_format (handle),
NULL,
NULL,
&closest_gl_format,
&closest_gl_type);
/* Note that we don't prepare the bitmap for upload here because
some backends may be internally using a different format for the
actual GL texture than that reported by
cogl_texture_get_format. For example the atlas textures are
always stored in an RGBA texture even if the texture format is
advertised as RGB. */
ret = tex->vtable->set_region (handle,
src_x, src_y,
@ -885,8 +881,6 @@ cogl_texture_set_region_from_bitmap (CoglHandle handle,
dst_width, dst_height,
bmp);
cogl_object_unref (bmp);
return ret;
}