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Add a CoglTexturePixmapX11 texture backend

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This is a publicly exposed texture backend to create a texture which
contains the contents of an X11 pixmap. The API is currently marked as
experimental.

The backend internally holds a handle to another texture. All of the
backend virtuals simply redirect to the internal texture.

The texture can optionally be automatically updated if the
automatic_updates parameter is TRUE. If set then Cogl will listen for
damage events on the pixmap and update the texture accordingly.
Alternatively a damage object can be created externally and passed
down to Cogl.

The updates can be performed with XGetImage, XShmGetImage or the
GLX_EXT_texture_pixmap extension. If the TFP extension is used it will
optionally try to create a rectangle texture if the driver does not
support NPOTs or it is forced through the
COGL_PIXMAP_TEXTURE_RECTANGLE or CLUTTER_PIXMAP_TEXTURE_RECTANGLE
environment variables.

If the GLXFBConfig does not support mipmapping then it will fallback
to using X{Shm,}GetImage. It keeps a separate texture around for this
so that it can later start using the TFP texture again if the texture
is later drawn with mipmaps disabled.
This commit is contained in:
Neil Roberts
2010-05-25 18:56:14 +01:00
parent 9c62265939
commit 8458fb7e20
9 changed files with 1758 additions and 7 deletions
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4
cogl/cogl-debug.c
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@ -51,7 +51,8 @@ static const GDebugKey cogl_log_debug_keys[] = {
{ "opengl", COGL_DEBUG_OPENGL },
{ "pango", COGL_DEBUG_PANGO },
{ "show-source", COGL_DEBUG_SHOW_SOURCE},
{ "offscreen", COGL_DEBUG_OFFSCREEN }
{ "offscreen", COGL_DEBUG_OFFSCREEN },
{ "texture-pixmap", COGL_DEBUG_TEXTURE_PIXMAP }
};
static const int n_cogl_log_debug_keys =
G_N_ELEMENTS (cogl_log_debug_keys);
@ -113,6 +114,7 @@ _cogl_parse_debug_string (const char *value,
/* XXX: we should replace the "draw" option its very hand wavy... */
OPT ("draw:", "misc tracing of some drawing operations");
OPT ("pango:", "trace the pango renderer");
OPT ("texture-pixmap:", "trace the Cogl texture pixmap backend");
OPT ("rectangles:", "add wire outlines for all rectangular geometry");
OPT ("disable-batching:", "disable the journal batching");
OPT ("disable-vbos:", "disable use of OpenGL vertex buffer objects");