Commit Graph

208 Commits

Author SHA1 Message Date
Robert Bragg
e9a45c7744 Merge branch 'cogl-material'
Conflicts:

	clutter/cogl/gl/cogl-texture.c
	clutter/cogl/gles/cogl-primitives.c

* cogl-material:
 clutter-{clone-,}texture weren't updating their material opacity.
 Updates GLES1 support for CoglMaterial
 Normalizes gl vs gles code in preperation for synching material changes
 Removes cogl_blend_func and cogl_alpha_func
 Fully integrates CoglMaterial throughout the rest of Cogl
 [cogl-material] Restore the GL_TEXTURE_ENV_MODE after material_rectangle
 [cogl-material] Make the user_tex_coords parameter of _rectangle const
 [test-cogl-material] Remove return value from material_rectangle_paint
 Add cogl-material.h and cogl-matrix.h to libclutterinclude_HEADERS
 [cogl-material] improvements for cogl_material_rectangle
 [cogl-material] Adds a cogl_material_set_color function
 [cogl-material] Some improvements for how we sync CoglMaterial state with OpenGL
 [cogl-material] Converts clutter-texture/clutter-clone-texture to the material API
 [doc] Hooks up cogl-material reference documentation
 Updates previous GLES multi-texturing code to use CoglMaterial
 Adds a CoglMaterial abstraction, which includes support for multi-texturing
 [doc] Hooks up cogl-matrix reference documentation
 Adds CoglMatrix utility code
 [tests] Adds an interactive unit test for multi-texturing
 [multi-texturing] This adds a new cogl_multi_texture API for GL,GLES1 + GLES2
2009-01-27 15:19:34 +00:00
Robert Bragg
4a7fa6d0fa Updates GLES1 support for CoglMaterial
This updates cogl/gles in line with the integration of CoglMaterial throughout
Cogl that has been done for cogl/gl.

Note: This is still buggy, but at least it builds again and test-actors works.
Some GLES2 specific changes were made, but these haven't been tested yet.
2009-01-27 14:26:50 +00:00
Robert Bragg
60e81f0fda Normalizes gl vs gles code in preperation for synching material changes
This changes all GLES code to use the OpenGL function names instead of
the cogl_wrap_* names. For GLES2 we now define the OpenGL name to point
to the wrapper, as opposed to defining the wrapper to point to the
OpenGL name for GLES1.

I've also done a quick pass through gl/cogl.c and gles/cogl.c to make
them more easily comparable. (most of the code is now identical)
2009-01-27 14:26:50 +00:00
Robert Bragg
427fff032e Removes cogl_blend_func and cogl_alpha_func
The GL blend function and alpha function are now controlled by the material
code, and even internally Cogl should now be using the material API when
it needs control of these.
2009-01-27 14:26:49 +00:00
Robert Bragg
5985eef44c Fully integrates CoglMaterial throughout the rest of Cogl
This glues CoglMaterial in as the fundamental way that Cogl describes how to
fill in geometry.

It adds cogl_set_source (), which is used to set the material which will be
used by all subsequent drawing functions

It adds cogl_set_source_texture as a convenience for setting up a default
material with a single texture layer, and cogl_set_source_color is now also
a convenience for setting up a material with a solid fill.

"drawing functions" include, cogl_rectangle, cogl_texture_rectangle,
cogl_texture_multiple_rectangles, cogl_texture_polygon (though the
cogl_texture_* funcs have been renamed; see below for details),
cogl_path_fill/stroke and cogl_vertex_buffer_draw*.

cogl_texture_rectangle, cogl_texture_multiple_rectangles and
cogl_texture_polygon no longer take a texture handle; instead the current
source material is referenced. The functions have also been renamed to:
cogl_rectangle_with_texture_coords, cogl_rectangles_with_texture_coords
and cogl_polygon respectivly.

Most code that previously did:
  cogl_texture_rectangle (tex_handle, x, y,...);
needs to be changed to now do:
  cogl_set_source_texture (tex_handle);
  cogl_rectangle_with_texture_coords (x, y,....);

In the less likely case where you were blending your source texture with a color
like:
  cogl_set_source_color4ub (r,g,b,a); /* where r,g,b,a isn't just white */
  cogl_texture_rectangle (tex_handle, x, y,...);
you will need your own material to do that:
  mat = cogl_material_new ();
  cogl_material_set_color4ub (r,g,b,a);
  cogl_material_set_layer (mat, 0, tex_handle));
  cogl_set_source_material (mat);

Code that uses the texture coordinates, 0, 0, 1, 1 don't need to use
cog_rectangle_with_texure_coords since these are the coordinates that
cogl_rectangle will use.

For cogl_texture_polygon; as well as dropping the texture handle, the
n_vertices and vertices arguments were transposed for consistency. So
code previously written as:
  cogl_texture_polygon (tex_handle, 3, verts, TRUE);
need to be written as:
  cogl_set_source_texture (tex_handle);
  cogl_polygon (verts, 3, TRUE);

All of the unit tests have been updated to now use the material API and
test-cogl-material has been renamed to test-cogl-multitexture since any
textured quad is now technically a test of CoglMaterial but this test
specifically creates a material with multiple texture layers.

Note: The GLES backend has not been updated yet; that will be done in a
following commit.
2009-01-27 14:26:39 +00:00
Neil Roberts
ba068f6bc9 Fix the Cogl primitives for the GLES backend
The Cogl primitives broke for GLES 1.1 and 2 after the cogl-float
branch merge.

CoglPathNode was still being declared as GLfixed for the GLES backend
but it was being filled with float values so they were all ending up
as numbers < 1.

glDrawArrays was being called with GL_FIXED so this has been changed
to GL_FLOAT.

The scanline rasterizer had a leftover hardcoded ClutterFixed constant
to add a small amount to the height of each line.

struct _CoglFloatVec2 has been removed because it is no longer used
anywhere.
2009-01-24 00:26:51 +00:00
Robert Bragg
3d07e34cc5 Merge commit 'origin/master' into cogl-material
Conflicts:

	clutter/clutter-texture.c
	clutter/cogl/cogl-texture.h
	clutter/cogl/cogl.h.in
	clutter/cogl/common/Makefile.am
	clutter/cogl/gl/Makefile.am
	clutter/cogl/gles/Makefile.am
	clutter/cogl/gles/cogl-gles2-wrapper.c
	clutter/cogl/gles/cogl-gles2-wrapper.h
2009-01-23 15:23:49 +00:00
Emmanuele Bassi
915d9ec7ca Split maintainer-flags from the compiler flags
The maintainer compiler flags we use trigger warnings and errors
in the autogenerated code that gtk-doc creates to scan the header
and source files. Since we cannot control that, and we must run
a distcheck with both --enable-gtk-doc and --enable-maintainer-flags
turned on, we need to use less-strict compiler flags when inside
the doc/reference subdirectories.

The way to do this is to split the maintainer compiler flags into
their own Makefile variable, called MAINTAINER_CFLAGS. The we
can use $(MAINTAINER_CFLAGS) in the INCLUDES or _CFLAGS sections
of each part of the source directories we wish to check with the
anal retentiveness suited for maintainers.
2009-01-23 13:09:51 +00:00
Emmanuele Bassi
20973bd29f Fix compiler warnings
The maintainer-flags option discovered the usual amount of
collisions and compiler warnings we have to fix in order to
get distcheck to pass.
2009-01-23 13:08:46 +00:00
Neil Roberts
634cdeab1f Fix some failures from the fixed-to-float script in cogl-texture
The script converted calls to COGL_FIXED_MUL(x,y) to (x*y). However
this fails for cases like this:

 COGL_FIXED_MUL(a + b, c)

which become

 (a + b * c)

The meaning of this is of course different because multiplication has
a higher precedence than addition.

This was causing breakages in cogl_texture_quad_sw when the vertex
coordinates are not in increasing order. This was the case in
test-backface-culling when NPOTs are not available.
2009-01-22 17:44:24 +00:00
Emmanuele Bassi
e7d533f176 Improve accuracy of clutter_sinx()
Improve clutter_sinx() by replacing the low precision CFX_SIN_STEP
with a multiply/divide pair. This reduces the maximum error from
1.8e-04 to 2.4e-05.

http://bugzilla.openedhand.com/show_bug.cgi?id=1314

Based on a patch by Owen W. Taylor <otaylor@fishsoup.net>
2009-01-22 15:59:23 +00:00
Emmanuele Bassi
e1ab6f972e [gles] Fix computation of camera distance
Port the fix in commit f409b58e to the GLES implementation of
COGL.
2009-01-22 14:52:34 +00:00
Owen W. Taylor
f409b58e89 Fix computation of camera distance
Compute the value of the camera distance as exactly half the xx
component of the projection matrix. The heuristically derived
value for 60 degrees was off by about 0.016%, causing noticeable
blurring, and other field of view angles which didn't have the
heuristic adjustment off by much more.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
2009-01-22 14:17:16 +00:00
Emmanuele Bassi
0be613109e [docs] Remove sources of warnings in API references 2009-01-21 16:41:18 +00:00
Emmanuele Bassi
c9739e6aef Change the COGL texture constructor to use flags
Boolean arguments for functions are pretty evil and usually
lead to combinatorial explosion of parameters in case multiple
settings are added.

In the case of the COGL texture constructors we have a boolean
argument for enabling the auto-mipmapping; it is conceivable that
we might want to add more settings for a COGL texture without
breaking API or ABI compatibility, so the boolean argument should
become a bitmask.

The internals have not been changed: instead of checking for
a non-zero value, we check for a bitmask being set.
2009-01-21 10:14:29 +00:00
Robert Bragg
e338245827 Renames the mesh api to the "vertex buffer api".
This better reflects the fact that the api manages sets of vertex attributes,
and the attributes really have no implied form. It is only when you use the
attributes to draw that they become mesh like; when you specify how they should
be interpreted, e.g. as triangle lists or fans etc. This rename frees up the
term "mesh", which can later be applied to a concept slightly more fitting.
E.g. at some point it would be nice to have a higher level abstraction that
sits on top of cogl vertex buffers that adds the concept of faces. (Somthing
like Blender's mesh objects.) There have also been some discussions over
particle engines, and these can be defined in terms of emitter faces; so some
other kind of mesh abstraction might be usefull here.
2009-01-20 22:29:35 +00:00
Robert Bragg
a2cf7e4a19 [Automatic fixed-to-float.sh change] Applies a number fixed to float patches
To deal with all the corner cases that couldn't be scripted a number of patches
were written for the remaining 10% of the effort.

Note: again no API changes were made in Clutter, only in Cogl.
2009-01-20 16:20:54 +00:00
Robert Bragg
e82f656590 [Automatic fixed-to-float.sh change] Applies all scripted changes
This is the result of running a number of sed and perl scripts over the code to
do 90% of the work in converting from 16.16 fixed to single precision floating
point.

Note: A pristine cogl-fixed.c has been maintained as a standalone utility API
      so that applications may still take advantage of fixed point if they
      desire for certain optimisations where lower precision may be acceptable.

Note: no API changes were made in Clutter, only in Cogl.

Overview of changes:
- Within clutter/* all usage of the COGL_FIXED_ macros have been changed to use
the CLUTTER_FIXED_ macros.

- Within cogl/* all usage of the COGL_FIXED_ macros have been completly stripped
and expanded into code that works with single precision floats instead.

- Uses of cogl_fixed_* have been replaced with single precision math.h
alternatives.

- Uses of COGL_ANGLE_* and cogl_angle_* have been replaced so we use a float for
angles and math.h replacements.
2009-01-20 16:20:54 +00:00
Neil Roberts
52d7b7be73 [fixed-to-float-patches] Move the changes to gles2-wrapper.h into the patch
It looks like the changes to cogl-gles2-wrapper.h were accidentally
committed to the actual file instead of the patch in commit
de27da0e. This commit moves the changes back into the patch so
cogl-gles2-wrapper.h is reverted back to master.
2009-01-16 10:50:53 +00:00
Neil Roberts
4e94500a2a Merge branch 'master' into cogl-float
The patches have been updated to apply cleanly.

The patches for the g_warnings in clutter-actor.c have been removed
because master now uses CLUTTER_UNITS_FORMAT so they aren't
necessary. The clutter-units.h patch now sets CLUTTER_UNITS_FORMAT to
'f'.
2009-01-15 18:26:22 +00:00
Neil Roberts
9339334a43 Fix GLES backends after merging the async-textures branch
The changes from the GL version of cogl-texture.c have been mirrored
in the GLES version. This adds the cogl_texture_new_from_bitmap
function and fixes the build errors.
2009-01-15 18:09:54 +00:00
Emmanuele Bassi
110489ee58 Merge branch 'async-textures'
* async-textures:
  Whitespace fixes in ClutterTexture
  [async-loading] Do not force the texture size on async load
  [async-loading] Update asynchronous image loading
  Add API for extracting image size from a file
  Update/clean and apply the async-texture patch from bug #1144
2009-01-14 15:16:41 +00:00
Neil Roberts
de114dead7 Fix GLES 2 after the multiple-texture-rectangle branch merge
The GLES 2 wrapper needs to set up some state before each
draw. Previously this was acheived by wrapping glDrawArrays. Since the
multiple-texture-rectangle branch merge, glDrawElements is used
instead so we also need a wrapper for that.

It was also directly calling glBindTexture. GLES 2 uses a wrapper for
this function so that it can cope with GL_ALPHA format textures. The
format of the current texture needs to be stored as well as the target
and object number for this to work.
2009-01-13 16:52:39 +00:00
Neil Roberts
453697fcad Update gtk-doc 'Since' field for cogl_texture_multiple_rectangles
The function has been backported to the 0.8 branch so it will also be
available in Clutter 0.8.6
2009-01-13 16:44:31 +00:00
Robert Bragg
616c082a7c Merge commit 'origin/master' into cogl-material
Conflicts:

	clutter/clutter-texture.c
	clutter/cogl/cogl-texture.h
	clutter/cogl/gles/cogl-context.c
	clutter/cogl/gles/cogl-context.h
2009-01-13 13:37:38 +00:00
Robert Bragg
de27da0e5b [cogl/gles] Fixes for building for GLES 1 using floats
* This adds GLfixed -> GLfloat conversion
* redefines cogl_wrap_glBlahx macros as glBlahf
* Other misc fixes (mostly corresponding to cogl/gl equivalents)
2009-01-12 17:21:09 +00:00
Emmanuele Bassi
1c114be31a Add API for extracting image size from a file
For the asynchronous loading we need a function call that parses
a file, given its path, and retrieves the image width and height.

This commit adds cogl_bitmap_get_size_from_file() to the CoglBitmap
API.
2009-01-12 16:52:20 +00:00
Emmanuele Bassi
946c075a2a Merge branch 'master' into async-textures 2009-01-12 14:43:53 +00:00
Emmanuele Bassi
ed991fe3c5 Declare G_LOG_DOMAIN for COGL
In order to get properly namespaced debug and warning messages
inside COGL code we need to define the G_LOG_DOMAIN macro.
2009-01-12 11:21:06 +00:00
Emmanuele Bassi
2693ea3ddc [docs] Documentation warnings
Fix the various warnings issued by gtk-doc when enabling the API
reference generation for both COGL and Clutter.
2009-01-09 14:26:35 +00:00
Chris Lord
2cea22e6a0 Update/clean and apply the async-texture patch from bug #1144 2009-01-07 17:02:43 +00:00
Neil Roberts
805b88d4c0 Merge branch multiple-texture-rectangle into master
Bug 1289 - Draw multiple glyphs at once

The multiple-texture-rectangle branch adds a new Cogl texture function
called cogl_texture_multiple_rectangles which is used to draw multiple
rectangles out of a texture using a single GL call. This is
significantly faster than drawing the rectangles with individual calls
on some platforms. The Pango renderer now uses this to speed up
rendering.

The conflicts are just due to the whitespace fixes in cb569a5.

Conflicts:

	clutter/cogl/gl/cogl-context.c
	clutter/cogl/gl/cogl-context.h
	clutter/cogl/gl/cogl-texture.c
2009-01-07 16:25:26 +00:00
Neil Roberts
12ea2933bd [cogl-material] Restore the GL_TEXTURE_ENV_MODE after material_rectangle
The rest of Cogl expects the texture mode to be GL_MODULATE so it
needs to be restored after calling cogl_material_rectangle. Otherwise
cogl_texture_rectangle will fail to blend with the Cogl color properly
and all of the labels will be black.
2009-01-06 18:24:57 +00:00
Neil Roberts
606d34f2aa [cogl-material] Make the user_tex_coords parameter of _rectangle const
The array is only used for input so it should be const.
2009-01-06 16:09:55 +00:00
Neil Roberts
f5288b1918 Add cogl-material.h and cogl-matrix.h to libclutterinclude_HEADERS
Otherwise they won't get installed
2009-01-06 15:53:35 +00:00
Robert Bragg
377f114046 [cogl-material] improvements for cogl_material_rectangle
The API has been changed to take an explicit length for the number of
texture coordinates passed, and it's now documented that if there are
more layers to the current material than the number of texture coords
passed, then default coordinates will be generated for the other
layers.

cogl_material_rectangle should now handle the case where a single
sliced texture is supplied as a material layer by falling back to
cogl_texture_rectangle. We are nearly at the point that
cogl_texture_rectangle could be deprecated. A few issues remain
though, such as not considering waste in cogl_material_rectangle.
2008-12-24 01:35:33 +00:00
Robert Bragg
e77a784714 [cogl-material] Adds a cogl_material_set_color function
The other colors of a material; such as the ambient and diffuse color are
only relevent when we can enable lighting. This adds a basic unlit
color property.

Later cogl_set_source_color can be integrated to either modify the color
of the current source material, or maintain a special singlton CoglMaterial
that is modified by calls to cogl_set_source_color and implicitly made
current.
2008-12-24 01:35:02 +00:00
Robert Bragg
462c45da3c [cogl-material] Some improvements for how we sync CoglMaterial state with OpenGL
This flattens the three functions: cogl_material_flush_gl_material_state,
.._flush_gl_alpha_func and .._flush_gl_blend_func into one:
cogl_flush_material_gl_state which doesn't takes a material handle. (the handle
is instead taken from the context.)

This has allows us to avoid re-submitting some state to OpenGL when the
material has not been replaced.

Note: Avoiding redundant state changes for material layers isn't dealt with
in this patch.
2008-12-24 01:33:23 +00:00
Robert Bragg
bb938ac4ff Merge branch 'master' into cogl-material
Conflicts:

	clutter/cogl/gl/cogl-context.c
	clutter/cogl/gl/cogl-context.h
2008-12-24 00:59:13 +00:00
Robert Bragg
cb569a5443 White space clean up across a number of files (only removing trailing spaces)
Removed trailing white space from the following files:
- clutter-clone-texture.c
- clutter-texture.c
- clutter-texture.h
- cogl/cogl-texture.h
- cogl/gl/cogl-context.c
- cogl/gl/cogl-texture.c
- cogl/gl/cogl-context.h
2008-12-24 00:48:32 +00:00
Robert Bragg
aee2589cc6 [doc] Hooks up cogl-material reference documentation
Adds some more gtk-doc comments to cogl-material.h, and adds a new section to
cogl-sections.txt
2008-12-22 16:35:52 +00:00
Robert Bragg
eb3b48e9ff Updates previous GLES multi-texturing code to use CoglMaterial
test-cogl-material now runs on GLES 1 using the PVR GLES1 SDK (though since
only 2 texture units are supported the third rotating light map doesn't show)

Note: It currently doesn't build for GLES 2.0
2008-12-22 16:35:52 +00:00
Robert Bragg
40b0bb4e95 Adds a CoglMaterial abstraction, which includes support for multi-texturing
My previous work to provide muti-texturing support has been extended into
a CoglMaterial abstraction that adds control over the texture combine
functions (controlling how multiple texture layers are blended together),
the gl blend function (used for blending the final primitive with the
framebuffer), the alpha function (used to discard fragments based on
their alpha channel), describing attributes such as a diffuse, ambient and
specular color (for use with the standard OpenGL lighting model), and
per layer rotations. (utilizing the new CoglMatrix utility API)

For now the only way this abstraction is exposed is via a new
cogl_material_rectangle function, that is similar to cogl_texture_rectangle
but doesn't take a texture handle (the source material is pulled from
the context), and the array of texture coordinates is extended to be able
to supply coordinates for each layer.

Note: this function doesn't support sliced textures; supporting sliced
textures is a non trivial problem, considering the ability to rotate layers.
Note: cogl_material_rectangle, has quite a few workarounds, for a number of
other limitations within Cogl a.t.m.
Note: The GLES1/2 multi-texturing support has yet to be updated to use
the material abstraction.
2008-12-22 16:35:52 +00:00
Robert Bragg
63047e1907 [doc] Hooks up cogl-matrix reference documentation
Adds a few more gtk-doc notes to cogl-matrix.h, and adds a new section to
cogl-sections.txt
2008-12-22 16:35:52 +00:00
Robert Bragg
fa8d6dc69b Adds CoglMatrix utility code 2008-12-22 16:35:52 +00:00
Robert Bragg
ea643ca0f8 [multi-texturing] This adds a new cogl_multi_texture API for GL,GLES1 + GLES2
Multitexturing allows blending multiple layers of texture data when texturing
some geometry. A common use is for pre-baked light maps which can give nice
lighting effects relativly cheaply. Another is for dot-3 bump mapping, and
another is applying alpha channel masks.

The dot-3 bump mapping would be really nice one day, but currently cogl doesn't
support lighting so that's not dealt with in this patch.

notable limitations:
- It can only texture rectangles a.t.m - and like cogl_texture_rectangle there
is no support for rotated texturing.
- Sliced textures are not supported. I think I've figured out how to handle
layers with different slice sizes at least for rectangular geometry, but I'm
not sure how complex it becomes once rotations are possible and texturing
arbitrary cogl_polygons.
- Except for this new API, cogl still doesn't know about more than one texture
unit, and so has no way of caching any enables related to other units. So that
things don't break it's currently necessary to disable anything to do with
additional units as soon as we are done with them which isn't ideal.
- No clutter API yet.
2008-12-22 16:35:51 +00:00
Neil Roberts
e21fee39b4 Merge commit 'git-svn' into multiple-texture-rectangle 2008-12-10 12:25:25 +00:00
Neil Roberts
dc6545ccd1 * clutter/cogl/gl/cogl.c:
* clutter/cogl/gl/cogl-defines.h.in:
	* clutter/cogl/gl/cogl-context.h:
	* clutter/cogl/common/cogl-mesh.c: Rename the glBufferDataSub
	function to glBufferSubData. When calling glXGetProcAddress with
	the former Mesa returns a stub dispatch function which will
	segfault if you try to use it. With NVIDIA it returns NULL so
	_cogl_features_init decides the card doesn't have VBO support.
2008-12-10 12:13:20 +00:00
Neil Roberts
9537f8e4ae Use a single index array
There's no point in clearing the index array because it is always the
same sequence of indices regardless of the vertices. Instead it is
just added to when there are more vertices than ever before.
2008-12-09 18:03:29 +00:00
Neil Roberts
0bedd891fb Support cogl_texture_multiple_rectangles in GL ES backend 2008-12-09 15:10:33 +00:00