fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-05 00:58:05 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

llvmpipe: quick & dirty implementation of lp_rast_store_zstencil()

Browse source 
This allows us to do a glReadPixels(GL_DEPTH_COMPONENT) to see what's
in the depth buffer to help debugging.
This commit is contained in:
Brian Paul 2009-12-03 11:41:45 -07:00
parent 69fe4281ea
commit 51663f0506
1 changed files with 50 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
src/gallium/drivers/llvmpipe/lp_rast.c
View file

@ -95,6 +95,23 @@ boolean lp_rast_begin( struct lp_rasterizer *rast,
return FALSE;
}
if (zsbuf) {
rast->zsbuf_transfer = screen->get_tex_transfer(rast->screen,
zsbuf->texture,
zsbuf->face,
zsbuf->level,
zsbuf->zslice,
PIPE_TRANSFER_READ_WRITE,
0, 0, width, height);
if (!rast->zsbuf_transfer)
return FALSE;
rast->zsbuf_map = screen->transfer_map(rast->screen,
rast->zsbuf_transfer);
if (!rast->zsbuf_map)
return FALSE;
}
return TRUE;
}
@ -117,7 +134,7 @@ void lp_rast_end( struct lp_rasterizer *rast )
screen->tex_transfer_destroy(rast->cbuf_transfer);
if (rast->zsbuf_transfer)
screen->tex_transfer_destroy(rast->cbuf_transfer);
screen->tex_transfer_destroy(rast->zsbuf_transfer);
rast->cbuf_transfer = NULL;
rast->zsbuf_transfer = NULL;
@ -359,14 +376,44 @@ static void lp_rast_store_color( struct lp_rasterizer *rast )
}
static void
lp_tile_write_z32(const uint32_t *src, uint8_t *dst, unsigned dst_stride,
unsigned x0, unsigned y0, unsigned w, unsigned h)
{
unsigned x, y;
uint8_t *dst_row = dst + y0*dst_stride;
for (y = 0; y < h; ++y) {
uint32_t *dst_pixel = (uint32_t *)(dst_row + x0*4);
for (x = 0; x < w; ++x) {
*dst_pixel++ = *src++;
}
dst_row += dst_stride;
}
}
/**
* Write the rasterizer's z/stencil tile to the framebuffer.
*/
static void lp_rast_store_zstencil( struct lp_rasterizer *rast )
{
RAST_DEBUG("%s\n", __FUNCTION__);
const unsigned x = rast->x;
const unsigned y = rast->y;
unsigned w = TILE_SIZE;
unsigned h = TILE_SIZE;
/* FIXME: call u_tile func to store depth/stencil to surface */
if (x + w > rast->width)
w -= x + w - rast->width;
if (y + h > rast->height)
h -= y + h - rast->height;
RAST_DEBUG("%s %d,%d %dx%d\n", __FUNCTION__, x, y, w, h);
assert(rast->zsbuf_transfer->format == PIPE_FORMAT_Z32_UNORM);
lp_tile_write_z32(rast->tile.depth,
rast->zsbuf_map,
rast->zsbuf_transfer->stride,
x, y, w, h);
}