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authorStephane Marchesin <marchesin@icps.u-strasbg.fr>2009-02-02 02:13:07 +0100
committerStephane Marchesin <marchesin@icps.u-strasbg.fr>2009-02-02 02:13:07 +0100
commit59edbc70cd1042a884e7d153ba547c2f7f87318d (patch)
treec5764fc515f31ab8017d63b476c8ec1178d41d96 /src/gallium/include/pipe/p_screen.h
parent4035e0f8989754ee7d31212e69d6461f1bbff008 (diff)
parent1c90cdd878e9d10e1f6ac619d5d0c3f5151fcb2b (diff)
Merge branch 'gallium-0.2' of git+ssh://marcheu@git.freedesktop.org/git/mesa/mesa into gallium-0.2
Diffstat (limited to 'src/gallium/include/pipe/p_screen.h')
-rw-r--r--src/gallium/include/pipe/p_screen.h105
1 files changed, 104 insertions, 1 deletions
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 492667c93a..0bd7d12e22 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -48,6 +48,8 @@ extern "C" {
#endif
+/** Opaque type */
+struct pipe_fence_handle;
/**
* Gallium screen/adapter context. Basically everything
@@ -128,7 +130,108 @@ struct pipe_screen {
void (*surface_unmap)( struct pipe_screen *,
struct pipe_surface *surface );
-
+
+
+ /**
+ * Buffer management. Buffer attributes are mostly fixed over its lifetime.
+ *
+ */
+ struct pipe_buffer *(*buffer_create)( struct pipe_screen *screen,
+ unsigned alignment,
+ unsigned usage,
+ unsigned size );
+
+ /**
+ * Create a buffer that wraps user-space data.
+ *
+ * Effectively this schedules a delayed call to buffer_create
+ * followed by an upload of the data at *some point in the future*,
+ * or perhaps never. Basically the allocate/upload is delayed
+ * until the buffer is actually passed to hardware.
+ *
+ * The intention is to provide a quick way to turn regular data
+ * into a buffer, and secondly to avoid a copy operation if that
+ * data subsequently turns out to be only accessed by the CPU.
+ *
+ * Common example is OpenGL vertex buffers that are subsequently
+ * processed either by software TNL in the driver or by passing to
+ * hardware.
+ *
+ * XXX: What happens if the delayed call to buffer_create() fails?
+ *
+ * Note that ptr may be accessed at any time upto the time when the
+ * buffer is destroyed, so the data must not be freed before then.
+ */
+ struct pipe_buffer *(*user_buffer_create)(struct pipe_screen *screen,
+ void *ptr,
+ unsigned bytes);
+
+ /**
+ * Allocate storage for a display target surface.
+ *
+ * Often surfaces which are meant to be blitted to the front screen (i.e.,
+ * display targets) must be allocated with special characteristics, memory
+ * pools, or obtained directly from the windowing system.
+ *
+ * This callback is invoked by the pipe_screenwhen creating a texture marked
+ * with the PIPE_TEXTURE_USAGE_DISPLAY_TARGET flag to get the underlying
+ * buffer storage.
+ */
+ struct pipe_buffer *(*surface_buffer_create)(struct pipe_screen *screen,
+ unsigned width, unsigned height,
+ enum pipe_format format,
+ unsigned usage,
+ unsigned *stride);
+
+
+ /**
+ * Map the entire data store of a buffer object into the client's address.
+ * flags is bitmask of PIPE_BUFFER_USAGE_CPU_READ/WRITE flags.
+ */
+ void *(*buffer_map)( struct pipe_screen *screen,
+ struct pipe_buffer *buf,
+ unsigned usage );
+
+ void (*buffer_unmap)( struct pipe_screen *screen,
+ struct pipe_buffer *buf );
+
+ void (*buffer_destroy)( struct pipe_screen *screen,
+ struct pipe_buffer *buf );
+
+
+ /**
+ * Do any special operations to ensure frontbuffer contents are
+ * displayed, eg copy fake frontbuffer.
+ */
+ void (*flush_frontbuffer)( struct pipe_screen *screen,
+ struct pipe_surface *surf,
+ void *context_private );
+
+
+
+ /** Set ptr = fence, with reference counting */
+ void (*fence_reference)( struct pipe_screen *screen,
+ struct pipe_fence_handle **ptr,
+ struct pipe_fence_handle *fence );
+
+ /**
+ * Checks whether the fence has been signalled.
+ * \param flags driver-specific meaning
+ * \return zero on success.
+ */
+ int (*fence_signalled)( struct pipe_screen *screen,
+ struct pipe_fence_handle *fence,
+ unsigned flag );
+
+ /**
+ * Wait for the fence to finish.
+ * \param flags driver-specific meaning
+ * \return zero on success.
+ */
+ int (*fence_finish)( struct pipe_screen *screen,
+ struct pipe_fence_handle *fence,
+ unsigned flag );
+
};