bb3a008318
Cogl's support for offscreen rendering was originally written just to support
the clutter_texture_new_from_actor API and due to lack of documentation and
several confusing - non orthogonal - side effects of using the API it wasn't
really possible to use directly.
This commit does a number of things:
- It removes {gl,gles}/cogl-fbo.{c,h} and adds shared cogl-draw-buffer.{c,h}
files instead which should be easier to maintain.
- internally CoglFbo objects are now called CoglDrawBuffers. A
CoglDrawBuffer is an abstract base class that is inherited from to
implement CoglOnscreen and CoglOffscreen draw buffers. CoglOffscreen draw
buffers will initially be used to support the
cogl_offscreen_new_to_texture API, and CoglOnscreen draw buffers will
start to be used internally to represent windows as we aim to migrate some
of Clutter's backend code to Cogl.
- It makes draw buffer objects the owners of the following state:
- viewport
- projection matrix stack
- modelview matrix stack
- clip state
(This means when you switch between draw buffers you will automatically be
switching to their associated viewport, matrix and clip state)
Aside from hopefully making cogl_offscreen_new_to_texture be more useful
short term by having simpler and well defined semantics for
cogl_set_draw_buffer, as mentioned above this is the first step for a couple
of other things:
- Its a step toward moving ownership for windows down from Clutter backends
into Cogl, by (internally at least) introducing the CoglOnscreen draw
buffer. Note: the plan is that cogl_set_draw_buffer will accept on or
offscreen draw buffer handles, and the "target" argument will become
redundant since we will instead query the type of the given draw buffer
handle.
- Because we have a common type for on and offscreen framebuffers we can
provide a unified API for framebuffer management. Things like:
- blitting between buffers
- managing ancillary buffers (e.g. attaching depth and stencil buffers)
- size requisition
- clearing
37 lines
789 B
Makefile
37 lines
789 B
Makefile
include $(top_srcdir)/build/autotools/Makefile.am.silent
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NULL =
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INCLUDES = \
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-I$(top_srcdir) \
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-I$(srcdir) \
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-I$(srcdir)/../.. \
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-I$(srcdir)/../../.. \
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-I$(srcdir)/winsys \
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-I$(srcdir)/driver/$(COGL_DRIVER) \
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-I../.. \
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-I../../.. \
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-DG_DISABLE_SINGLE_INCLUDES \
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-DG_LOG_DOMAIN=\"Cogl-Driver\" \
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-DCLUTTER_COMPILATION
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noinst_LTLIBRARIES = libclutter-cogl-driver.la
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libclutter_cogl_driver_la_CPPFLAGS = \
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$(CLUTTER_CFLAGS) \
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$(COGL_DEBUG_CFLAGS) \
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$(CLUTTER_DEBUG_CFLAGS) \
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$(MAINTAINER_CFLAGS)
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libclutter_cogl_driver_la_SOURCES = \
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cogl.c \
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cogl-primitives.c \
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cogl-texture-driver.c \
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cogl-shader-private.h \
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cogl-shader.c \
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cogl-program.h \
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cogl-program.c \
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cogl-context-driver.h \
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cogl-context-driver.c \
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$(NULL)
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EXTRA_DIST = cogl-defines.h.in
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