When a component-alpha texture is made using a GL3 context a GL_RED
texture is actually used and a swizzle is set up to hide it. However
if a framebuffer is then bound to that texture then when the bits are
queried this workaround will leak out of the API. To fix this it now
detects the situation and reports the number of red bits as the number
of alpha bits.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 425cfb2675912a2cbcaaaeed7c2196d563948222)
Previously when the context was initialised Cogl would query the
number of stencil bits and set a private feature flag to mark that it
can use the buffer for clipping if there was at least 3. The problem
with this is that the number of stencil bits returned by
GL_STENCIL_BITS depends on the currently bound framebuffer. This patch
adds an internal function to query the number of stencil bits in a
framebuffer and makes it use that instead when determining whether it
can push the clip using the stencil buffer.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit e928d21516a6c07798655341f4f0f8e3c1d1686c)
Cogl publicly exposes the depth buffer state so we might as well have
a function to query the number of depth bits of a framebuffer.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 853143eb10387f50f8d32cf09af31b8829dc1e01)
The GL framebuffer driver now makes sure to bind the framebuffer
before counting the number of bits. Previously it would just query the
number of bits for whatever framebuffer happened to be used last.
In addition the virtual for querying the framebuffer bits has been
modified to take a pointer to a structure instead of a separate
pointer to each component. This should make it slightly more efficient
and easier to maintain.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit e9c58b2ba23a7cebcd4e633ea7c3191f02056fb5)
The GL3 context is created using the glXCreateContextAttribs function
which is part of the GLX_ARB_create_context extension. However
previously the function pointers from GLX extensions were only
retrieved once the GL context is created. That meant that the GL3
context creation function would always assume that the extension is
not supported so it would always fail.
This patch changes it to query the functions when the renderer is set
up instead. The base winsys feature flags that are determined while
querying the functions are stored in a member of CoglGLXRenderer.
These are then copied to the CoglContext when it is initialised.
The spec for glXGetProcAddress says that the functions returned are
context-independent. That implies that it is safe to call it without
binding a context although that is not explicitly stated as far as I
can tell. A big of googling finds this DRI documentation which says it
can be used without a context:
http://dri.freedesktop.org/wiki/glXGetProcAddressNeverReturnsNULL
And also this code sample:
http://www.opengl.org/wiki/Tutorial:_OpenGL_3.0_Context_Creation_%28GLX%29
One point that makes me concerned that this might not always work in
practice is that the code in SDL2 to create a GL3 context first
creates a dummy GL2 context in order to have something bound before it
calls glXGetProcAddress. I think this may just be a misunderstanding
based on how wglGetProcAddress works however.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 04a7aca9a98e84e43ac5559305a1358112902e30)
_cogl_texture_spans_foreach_in_region first swaps over the texture
coordinates if they are flipped so that it can always iterate in a
positive direction. It sets a flag so that it will remember that the
coordinates are flipped. Before invoking the callback it is meant to
reflip the coordinates so that the callee doesn't need to be aware of
the flipping. However it was only flipping the sub-texture coordinates
and not the virtual coordinates. This was causing sliced textures to
draw their slice rectangles with the wrong geometry.
test-backface-culling was failing because of this.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit e7338a1e09cb22151374aefa6f0bb58485af9189)
There were a few problems with the sub texture iterating code of
sliced textures which were causing some conformance tests to fail when
NPOT textures are disabled:
• The spans are stored in un-normalized coordinates and the
coordinates passed to the foreach function are normalized. The
function was trying to un-normalize them before passing them to the
span iterator code but it was using the wrong factor which was
causing it to actually doubley normalize them.
• The shim function to renormalize the coordinates before passing them
to the callback was renormalizing the sub-texture coordinates
instead of the virtual coordinates. The sub-texture coordinates are
already in the right scale for whatever is the underlying texture so
we don't need to touch them. Instead we need to normalize the
virtual coordinates because these are coming from the un-normalized
coordinates that we passed to the span iterating code.
• The normalize factors passed to the span iterating were always 1.
The code uses this normalizing factor to round the incoming
coordinates to the nearest multiple of a full texture. It divides
the coordinates by the factor rather than multiplying so it looks
like we should be passing the virtual texture size here.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit c9773566b0ec0a17b34c440090529de8cff9609e)
This adds a cogl_texture_set_data function that is basically just a
convenience wrapper around cogl_texture_set_region. In the common case
where you want to upload the full contents of a mipmap level though this
api takes 4 less arguments (6 in total) so it's a bit simpler.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit e651dbdc4e4f03016a3dee513e3680270a4a9142)
Consistent with how we lazily allocate framebuffers this patch allows us
to instantiate textures but still specify constraints and requirements
before allocating storage so that we can be sure to allocate the most
appropriate/efficient storage.
This adds a cogl_texture_allocate() function that is analogous to
cogl_framebuffer_allocate() which can optionally be called to explicitly
allocate storage and catch any errors. If this function isn't used
explicitly then Cogl will implicitly ensure textures are allocated
before the storage is needed.
It is generally recommended to rely on lazy storage allocation or at
least perform explicit allocation as late as possible so Cogl can be
fully informed about the best way to allocate storage.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 1fa7c0f10a8a03043e3c75cb079a49625df098b7)
Note: This reverts the cogl_texture_rectangle_new_with_size API change
that dropped the CoglError argument and keeps the semantics of
allocating the texture immediately. This is because Mutter currently
uses this API so we will probably look at updating this later once
we have a corresponding Mutter patch prepared. The other API changes
were kept since they only affected experimental api.
There was a lot of redundancy in how we tracked the width and height of
different texture types which is greatly simplified by adding width and
height members to CoglTexture directly and removing the get_width and
get_height vfuncs from CoglTextureVtable
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 3236e47723e4287d5e0023f29083521aeffc75dd)
This moves the _cogl_texture_get_gl_format function from cogl-texture.c
to cogl-texture-gl.c and renames it _cogl_texture_gl_get_format.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit f8deec01eff7d8d9900b509048cf1ff1c86ca879)
This moves the direct use of GL in cogl-framebuffer.c for handling
cogl_framebuffer_read_pixels_into_bitmap() into
driver/gl/cogl-framebuffer-gl.c and adds a
->framebuffer_read_pixels_into_bitmap vfunc to CoglDriverVtable.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 2f893054d6754e6bc7983f061b27c7858f1a593c)
This remove cogl-internal.h in favour of using cogl-private.h. Some
things in cogl-internal.h were moved to driver/gl/cogl-util-gl-private.h
and the _cogl_gl_error_to_string function whose prototype was moved from
cogl-internal.h to cogl-util-gl-private.h has had its implementation
moved from cogl.c to cogl-util-gl.c
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 01cc82ece091aa3bec4c07fdd6bc9e5135fca573)
Symbols changed names, %1 makes gtk-doc sad and some referenced symbols
were missing in the -sections.txt file.
(cherry picked from commit c12919c321186ac7b223bc4f82c588ca2f199d67)
For external (non gtk-doc even) constants, we can use <constant> to
correctly tag those without gtk-doc trying to cross-reference them.
(cherry picked from commit 78d22c6cd44a2279adcd2b94c3317292af861c70)
gtk-doc is not smart enough to parse things like:
typedef struct
{
...
} CoglFoo;
but needs the '{' at the end of the first line.
(cherry picked from commit d1187550ef547305fdeb8a22a7e39a95611a0e1d)
gtk-doc needs the types in -sections.txt to be able to do
cross-references. Add all those currently generating warnings.
(cherry picked from commit e57a21d2608f0885e6f2eb3a017feb7dffb7a63c)
That's actually for signals in gtk-doc and we're not dealing with
GObjects so it's not really appropriate. Used <structfield> as it's the
closest tag I could find to describe a 'property' of a CoglObject and
gives a generic style in the produced HTML.
(cherry picked from commit 8b485d57577cff227a0c7a2e6c06d8d277821374)
I just added the general types creating warnings in the current state of the
documentation (ie the ones references by already documented functions)
and moved the section from the 'Utility' section to the 'General'
section which I believe is a better fit as they are used by more than
one type and not really utilities.
(cherry picked from commit c51b147789763863ef32482d7ffa936160ed7c93)
Various changes have led to the current, separate from the pipeline,
depth state, this commit fixes the remaining waring around that.
(cherry picked from commit 111e687e722ad67a0e1c09f881c6282ccb06410b)
Instead of just having the reference at the end of the paragraph.
Usually seen as more usable.
(cherry picked from commit 6988d3ae61ab16fb298b34d2bd31860833f04186)
Argument names and @$arg suffered from various little mismatches, fix
them in a batch commit.
(cherry picked from commit d2ac3c5a88d980e7519c98bd261111b93cf73a6e)
cogl-index-range was the old API, update the section name to match what
is declared in the documentation. Also update the short description to
better match the new API.
(cherry picked from commit d73df38ff2a8ebe477e139e5ac20838c8f4364bb)
gtk-doc complains that having a sentence starting by Return is a bit
ambiguous and it'd rather see 'Returns:' spelled out.
Fixes 2 warnings:
warning: Free-form return value description in $symbol. Use `Returns:'
to avoid ambiguities
(cherry picked from commit 9718f31717b3a0e01b7c4c69cea138f39d23c0e0)
COGL_HAS_* and COGL_ENABLE_DEBUG are either defined in config.h or not.
So let's test against this, not against their truth value, this allow us
to use -Wundef to catch undefined macros in preprocessor directives.
(cherry picked from commit 73b62832f24711073b0876a6c0f5c61727842c1c)
Cogl always needs to have the context bound to something so that it
can freely create resources such as textures even if there is no
current window. When the currently bound SDLWindow is destroyed, SDL
apparently explicitly unbinds the GL context. If something then later
for example tries to create a texture Cogl would start getting GL
errors and fail. To fix this the SDL winsys now just binds the dummy
window before deiniting the currently bound onscreen.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 2c0cfdefbb9d1ac5097d98887d3581b67a324fae)
We have found several times now when writing code using Cogl that it
would really help if Cogl's matrix stack api was public as a utility
api. In Rig for example we want to avoid redundant arithmetic when
deriving the matrices of entities used to render and we aren't able
to simply use the framebuffer's matrix stack to achieve this. Also when
implementing cairo-cogl we found that it would be really useful if we
could have a matrix stack utility api.
(cherry picked from commit d17a01fd935d88fab96fe6cc0b906c84026c0067)
At times there can be huge numbers of CoglMatrixEntry structures
allocated if they are being used to track the transform of many drawing
commands or objects in a scenegraph. Therefore the size of a
CoglMatrixEntry should be kept as small as possible both to help reduce
the memory usage of applications but also to improve cache usage since
matrix stack manipulations are performance critical at times.
This reduces the size of CoglMatrixEntry structures for non-debug builds
by removing the composite_gets counter used to sanity check how often
the transform for an entry is resolved.
(cherry picked from commit c400b86681a328b1e12b7e120e9c3f4f12c356e0)
This moves the parent pointer member to the top of the CoglMatrixEntry
structure since it will lead to wasted padding when we build for 64bit
cpus.
(cherry picked from commit 42b4750070286a6404b103d8a827a46efb6b344c)
When unrefing a CoglMatrixEntry we walk up the ancestry unrefing and
freeing entries until we find an entry that doesn't need to be freed.
The problem fixed by this patch was that we didn't dereference the
parent member of each entry until after the entry was freed and so there
was the potential for reading a junk parent pointer back.
(cherry picked from commit e5d836b84acb35a009854a0cc0892320023789d1)
It is considered an error to pass a NULL data pointer to
cogl_attribute_buffer_new so we now call
cogl_attribute_buffer_new_with_size instead.
(cherry picked from commit 8e201574b9c35847aa4e999a391741538a0b356b)
Both the texture drivers weren't handling errors correctly when a
CoglPixelBuffer was used to set the contents of an entire texture.
This was causing it to hit an assertion failure in the pixel buffer
tests.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
(cherry picked from commit 888733d3c3b24080d2f136cedb3876a41312e4cf)
