diff options
| author | Chad Versace <chad@chad-versace.us> | 2011-05-23 14:23:54 -0700 |
|---|---|---|
| committer | Chad Versace <chad@chad-versace.us> | 2011-06-08 10:08:58 -0700 |
| commit | a62db5b050dee10246c02c72385358acb5e72b56 (patch) | |
| tree | 4c082de8764ff521cacecb3cefb2b41c00ebecf8 /src/intel_dri.c | |
| parent | 263daba7e6afb37bd471fdc8dd8e4458da0a45ff (diff) | |
dri: Add support for DRI2BufferStencil and DRI2BufferHiz
And bump configure.ac to require dri2proto >= 2.6, because
DRI2BufferStencil and DRI2BufferHiz were introduced in that version.
When a client requests DRI2BufferHiz or DRI2BufferStencil,
I830DRI2CreateBuffer() now returns a Y-tiled buffer. The stencil buffer is
handled as a special case due its quirky pitch requirements.
CC: Eric Anholt <eric@anholt.net>
CC: Ian Romanick <idr@freedesktop.org>
CC: Kristian Høgsberg <krh@bitplanet.net
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Chad Versace <chad@chad-versace.us>
Diffstat (limited to 'src/intel_dri.c')
| -rw-r--r-- | src/intel_dri.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/src/intel_dri.c b/src/intel_dri.c index 4571d075..be5c6b1c 100644 --- a/src/intel_dri.c +++ b/src/intel_dri.c @@ -329,11 +329,16 @@ I830DRI2CreateBuffer(DrawablePtr drawable, unsigned int attachment, pixmap = get_front_buffer(drawable); if (pixmap == NULL) { unsigned int hint = INTEL_CREATE_PIXMAP_DRI2; + int pixmap_width = drawable->width; + int pixmap_height = drawable->height; + int pixmap_cpp = (format != 0) ? format : drawable->depth; if (intel->tiling & INTEL_TILING_3D) { switch (attachment) { case DRI2BufferDepth: case DRI2BufferDepthStencil: + case DRI2BufferStencil: + case DRI2BufferHiz: if (SUPPORTS_YTILING(intel)) { hint |= INTEL_CREATE_PIXMAP_TILING_Y; break; @@ -354,11 +359,28 @@ I830DRI2CreateBuffer(DrawablePtr drawable, unsigned int attachment, } } + /* + * The stencil buffer has quirky pitch requirements. From Vol + * 2a, 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface + * Pitch": + * The pitch must be set to 2x the value computed based on + * width, as the stencil buffer is stored with two rows + * interleaved. + * To accomplish this, we resort to the nasty hack of doubling + * the drm region's cpp and halving its height. + * + * If we neglect to double the pitch, then + * drm_intel_gem_bo_map_gtt() maps the memory incorrectly. + */ + if (attachment == DRI2BufferStencil) { + pixmap_height /= 2; + pixmap_cpp *= 2; + } + pixmap = screen->CreatePixmap(screen, - drawable->width, - drawable->height, - (format != 0) ? format : - drawable->depth, + pixmap_width, + pixmap_height, + pixmap_cpp, hint); if (pixmap == NULL || intel_get_pixmap_bo(pixmap) == NULL) { if (pixmap) |