/**
* Clear the given surface to the specified value.
* No masking, no scissor (clear entire buffer).
*/
static void brw_clear(struct pipe_context *pipe,
unsigned buffers,
const float *rgba,
double depth,
unsigned stencil)
{
struct brw_context *brw = brw_context( pipe );
int i;
if (buffers & PIPE_CLEAR_COLOR) {
for (i = 0; i < brw->curr.fb.nr_cbufs; i++) {
color_clear( brw,
brw_surface(brw->curr.fb.cbufs[i]),
rgba );
}
}
if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
if (brw->curr.fb.zsbuf) {
zstencil_clear( brw,
brw_surface(brw->curr.fb.zsbuf),
buffers & PIPE_CLEAR_DEPTHSTENCIL,
depth, stencil );
}
}
}
static int prepare_depthbuffer(struct brw_context *brw)
{
struct pipe_surface *zsbuf = brw->curr.fb.zsbuf;
if (zsbuf)
brw_add_validated_bo(brw, brw_surface(zsbuf)->bo);
return 0;
}
/* XXX should respect region */
static void brw_clear_render_target(struct pipe_context *pipe,
struct pipe_surface *dst,
const float *rgba,
unsigned dstx, unsigned dsty,
unsigned width, unsigned height)
{
struct brw_context *brw = brw_context( pipe );
color_clear( brw,
brw_surface(dst),
rgba );
}
/* XXX should respect region */
static void brw_clear_depth_stencil(struct pipe_context *pipe,
struct pipe_surface *dst,
unsigned clear_flags,
double depth,
unsigned stencil,
unsigned dstx, unsigned dsty,
unsigned width, unsigned height)
{
struct brw_context *brw = brw_context( pipe );
zstencil_clear( brw,
brw_surface(dst),
clear_flags,
depth, stencil );
}
static int emit_depthbuffer(struct brw_context *brw)
{
struct pipe_surface *surface = brw->curr.fb.zsbuf;
unsigned int len = (BRW_IS_G4X(brw) || BRW_IS_IGDNG(brw)) ? 6 : 5;
if (surface == NULL) {
BEGIN_BATCH(len, IGNORE_CLIPRECTS);
OUT_BATCH(CMD_DEPTH_BUFFER << 16 | (len - 2));
OUT_BATCH((BRW_DEPTHFORMAT_D32_FLOAT << 18) |
(BRW_SURFACE_NULL << 29));
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
if (BRW_IS_G4X(brw) || BRW_IS_IGDNG(brw))
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
struct brw_winsys_buffer *bo;
unsigned int format;
unsigned int pitch;
unsigned int cpp;
switch (surface->format) {
case PIPE_FORMAT_Z16_UNORM:
format = BRW_DEPTHFORMAT_D16_UNORM;
cpp = 2;
break;
case PIPE_FORMAT_Z24X8_UNORM:
case PIPE_FORMAT_Z24S8_UNORM:
format = BRW_DEPTHFORMAT_D24_UNORM_S8_UINT;
cpp = 4;
break;
case PIPE_FORMAT_Z32_FLOAT:
format = BRW_DEPTHFORMAT_D32_FLOAT;
cpp = 4;
break;
default:
assert(0);
return PIPE_ERROR_BAD_INPUT;
}
bo = brw_surface(surface)->bo;
pitch = brw_surface(surface)->pitch;
BEGIN_BATCH(len, IGNORE_CLIPRECTS);
OUT_BATCH(CMD_DEPTH_BUFFER << 16 | (len - 2));
OUT_BATCH(((pitch * cpp) - 1) |
(format << 18) |
(BRW_TILEWALK_YMAJOR << 26) |
((surface->layout != PIPE_SURFACE_LAYOUT_LINEAR) << 27) |
(BRW_SURFACE_2D << 29));
OUT_RELOC(bo,
BRW_USAGE_DEPTH_BUFFER,
surface->offset);
OUT_BATCH((BRW_SURFACE_MIPMAPLAYOUT_BELOW << 1) |
((pitch - 1) << 6) |
((surface->height - 1) << 19));
OUT_BATCH(0);
if (BRW_IS_G4X(brw) || BRW_IS_IGDNG(brw))
OUT_BATCH(0);
ADVANCE_BATCH();
}
return 0;
}