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this change disassociates, at least from the driver perspective,
the surface from buffer. surfaces are technically now views on the
textures so make it so by hiding the buffer in the internals of
textures.
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move it to pipe/internal/p_winsys_screen.h and start converting
the state trackers to the screen usage
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allows the driver to overwrite buffer allocation, first step on the way
to making winsys interface internal to the drivers. state trackers and
the code above it will go through the screen
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This commit is mostly just a cosmetic change that cleans-up the interfaces,
replacing pipe_winsys::surface_* calls by
/**
* 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_winsys *ws,
unsigned width, unsigned height,
enum pipe_format format,
unsigned usage,
unsigned *stride);
Most drivers were updated but not all were tested. Use the softpipe pipe
driver and the xlib winsys changes as a reference when fixing other drivers.
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This is sometimes checked to distinguish between texture views and
(deprecated) standalone surfaces.
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Otherwise blitting from display target surfaces to front screen fails in
several platforms.
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We want to use the pipe_buffer_* inlines everywhere, but a pipe context
is not always available nor is it needed.
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Also, rename p_tile.[ch] to u_tile.[ch]
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The chars-per-pixel concept falls apart with compressed and yuv images,
where more than one pixel are coded in a single data block.
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softpipe_texture object.
Fixes a pitch/width mix-up.
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When a surface is created with GPU_WRITE that really means "GPU render"
and that can involve reads (blending). Set surface usage to
PIPE_BUFFER_USAGE_CPU_READ + WRITE. Fixes progs/demos/lodbias demo.
Also, mark texture as 'modified' when mapped for writing so that the tile
cache can know when to freshen a cached tile. Fixes glTexSubImage2D().
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For many envirionments it's necessary to allocate display targets
in a window-system friendly manner. Add facilities so that a driver
can tell if a texture is likely to be used to generate a display surface
and if use special allocation paths if necessary.
Hook up softpipe to call into the winsys->surface_alloc_storage()
routine in this case, though we probably want to change that interface
slightly also.
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But when creating surfaces, adjust incoming flags from GPU->CPU usage.
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This provides better information about which images in texture object have changed.
Also, call texture_update() from more places previously missed.
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Bind all the samplers/textures at once rather than piecemeal.
This is easier for drivers to understand.
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These functions are now per-screen, not per-context.
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Added pipe field to pipe_texture (temporary, see comments).
First step toward context-less texture creation...
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This fixes at least one instance of dereferencing an invalid texture pointer.
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Called whenever texture data is changed (glTexImage, glTexSubImage,
glCopyTexSubImage, etc).
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This is in a separate commit to ensure renames are properly preserved.
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