bool
do_single_blorp_clear(struct brw_context *brw, struct gl_framebuffer *fb,
struct gl_renderbuffer *rb, unsigned buf,
bool partial_clear, unsigned layer)
{
struct gl_context *ctx = &brw->ctx;
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
brw_blorp_clear_params params(brw, fb, rb, ctx->Color.ColorMask[buf],
partial_clear, layer);
bool is_fast_clear =
(params.fast_clear_op == GEN7_FAST_CLEAR_OP_FAST_CLEAR);
if (is_fast_clear) {
/* Record the clear color in the miptree so that it will be
* programmed in SURFACE_STATE by later rendering and resolve
* operations.
*/
uint32_t new_color_value =
compute_fast_clear_color_bits(&ctx->Color.ClearColor);
if (irb->mt->fast_clear_color_value != new_color_value) {
irb->mt->fast_clear_color_value = new_color_value;
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}
/* If the buffer is already in INTEL_FAST_CLEAR_STATE_CLEAR, the clear
* is redundant and can be skipped.
*/
if (irb->mt->fast_clear_state == INTEL_FAST_CLEAR_STATE_CLEAR)
return true;
/* If the MCS buffer hasn't been allocated yet, we need to allocate
* it now.
*/
if (!irb->mt->mcs_mt) {
if (!intel_miptree_alloc_non_msrt_mcs(brw, irb->mt)) {
/* MCS allocation failed--probably this will only happen in
* out-of-memory conditions. But in any case, try to recover
* by falling back to a non-blorp clear technique.
*/
return false;
}
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}
}
const char *clear_type;
if (is_fast_clear)
clear_type = "fast";
else if (params.wm_prog_key.use_simd16_replicated_data)
clear_type = "replicated";
else
clear_type = "slow";
DBG("%s (%s) to mt %p level %d layer %d\n", __FUNCTION__, clear_type,
irb->mt, irb->mt_level, irb->mt_layer);
brw_blorp_exec(brw, ¶ms);
if (is_fast_clear) {
/* Now that the fast clear has occurred, put the buffer in
* INTEL_FAST_CLEAR_STATE_CLEAR so that we won't waste time doing
* redundant clears.
*/
irb->mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_CLEAR;
}
return true;
}
bool
brw_meta_fast_clear(struct brw_context *brw, struct gl_framebuffer *fb,
GLbitfield buffers, bool partial_clear)
{
struct gl_context *ctx = &brw->ctx;
mesa_format format;
enum { FAST_CLEAR, REP_CLEAR, PLAIN_CLEAR } clear_type;
GLbitfield plain_clear_buffers, meta_save, rep_clear_buffers, fast_clear_buffers;
struct rect fast_clear_rect, clear_rect;
int layers;
fast_clear_buffers = rep_clear_buffers = plain_clear_buffers = 0;
/* First we loop through the color draw buffers and determine which ones
* can be fast cleared, which ones can use the replicated write and which
* ones have to fall back to regular color clear.
*/
for (unsigned buf = 0; buf < fb->_NumColorDrawBuffers; buf++) {
struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buf];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
int index = fb->_ColorDrawBufferIndexes[buf];
/* Only clear the buffers present in the provided mask */
if (((1 << index) & buffers) == 0)
continue;
/* If this is an ES2 context or GL_ARB_ES2_compatibility is supported,
* the framebuffer can be complete with some attachments missing. In
* this case the _ColorDrawBuffers pointer will be NULL.
*/
if (rb == NULL)
continue;
clear_type = FAST_CLEAR;
/* We don't have fast clear until gen7. */
if (brw->gen < 7)
clear_type = REP_CLEAR;
if (irb->mt->fast_clear_state == INTEL_FAST_CLEAR_STATE_NO_MCS)
clear_type = REP_CLEAR;
/* We can't do scissored fast clears because of the restrictions on the
* fast clear rectangle size.
*/
if (partial_clear)
clear_type = REP_CLEAR;
/* Fast clear is only supported for colors where all components are
* either 0 or 1.
*/
format = _mesa_get_render_format(ctx, irb->mt->format);
if (!is_color_fast_clear_compatible(brw, format, &ctx->Color.ClearColor))
clear_type = REP_CLEAR;
/* From the SNB PRM (Vol4_Part1):
*
* "Replicated data (Message Type = 111) is only supported when
* accessing tiled memory. Using this Message Type to access
* linear (untiled) memory is UNDEFINED."
*/
if (irb->mt->tiling == I915_TILING_NONE) {
perf_debug("falling back to plain clear because buffers are untiled\n");
clear_type = PLAIN_CLEAR;
}
/* Constant color writes ignore everything in blend and color calculator
* state. This is not documented.
*/
GLubyte *color_mask = ctx->Color.ColorMask[buf];
for (int i = 0; i < 4; i++) {
if (_mesa_format_has_color_component(irb->mt->format, i) &&
!color_mask[i]) {
perf_debug("falling back to plain clear because of color mask\n");
clear_type = PLAIN_CLEAR;
}
}
/* Allocate the MCS for non MSRT surfaces now if we're doing a fast
* clear and we don't have the MCS yet. On failure, fall back to
* replicated clear.
*/
if (clear_type == FAST_CLEAR && irb->mt->mcs_mt == NULL)
if (!intel_miptree_alloc_non_msrt_mcs(brw, irb->mt))
clear_type = REP_CLEAR;
switch (clear_type) {
case FAST_CLEAR:
irb->mt->fast_clear_color_value =
compute_fast_clear_color_bits(&ctx->Color.ClearColor);
irb->need_downsample = true;
/* If the buffer is already in INTEL_FAST_CLEAR_STATE_CLEAR, the
* clear is redundant and can be skipped. Only skip after we've
* updated the fast clear color above though.
*/
if (irb->mt->fast_clear_state == INTEL_FAST_CLEAR_STATE_CLEAR)
continue;
/* Set fast_clear_state to RESOLVED so we don't try resolve them when
* we draw, in case the mt is also bound as a texture.
*/
irb->mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_RESOLVED;
irb->need_downsample = true;
fast_clear_buffers |= 1 << index;
get_fast_clear_rect(brw, fb, irb, &fast_clear_rect);
break;
case REP_CLEAR:
rep_clear_buffers |= 1 << index;
get_buffer_rect(brw, fb, irb, &clear_rect);
break;
case PLAIN_CLEAR:
plain_clear_buffers |= 1 << index;
get_buffer_rect(brw, fb, irb, &clear_rect);
continue;
}
}
if (!(fast_clear_buffers | rep_clear_buffers)) {
if (plain_clear_buffers)
/* If we only have plain clears, skip the meta save/restore. */
goto out;
else
/* Nothing left to do. This happens when we hit the redundant fast
* clear case above and nothing else.
*/
return true;
}
meta_save =
MESA_META_ALPHA_TEST |
MESA_META_BLEND |
MESA_META_DEPTH_TEST |
MESA_META_RASTERIZATION |
MESA_META_SHADER |
MESA_META_STENCIL_TEST |
MESA_META_VERTEX |
MESA_META_VIEWPORT |
MESA_META_CLIP |
MESA_META_CLAMP_FRAGMENT_COLOR |
MESA_META_MULTISAMPLE |
MESA_META_OCCLUSION_QUERY |
MESA_META_DRAW_BUFFERS;
_mesa_meta_begin(ctx, meta_save);
if (!brw_fast_clear_init(brw)) {
/* This is going to be hard to recover from, most likely out of memory.
* Bail and let meta try and (probably) fail for us.
*/
plain_clear_buffers = buffers;
goto bail_to_meta;
}
/* Clears never have the color clamped. */
if (ctx->Extensions.ARB_color_buffer_float)
_mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
_mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
_mesa_DepthMask(GL_FALSE);
_mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);
use_rectlist(brw, true);
layers = MAX2(1, fb->MaxNumLayers);
if (fast_clear_buffers) {
_mesa_meta_drawbuffers_from_bitfield(fast_clear_buffers);
brw_bind_rep_write_shader(brw, (float *) fast_clear_color);
set_fast_clear_op(brw, GEN7_PS_RENDER_TARGET_FAST_CLEAR_ENABLE);
brw_draw_rectlist(ctx, &fast_clear_rect, layers);
set_fast_clear_op(brw, 0);
}
if (rep_clear_buffers) {
_mesa_meta_drawbuffers_from_bitfield(rep_clear_buffers);
brw_bind_rep_write_shader(brw, ctx->Color.ClearColor.f);
brw_draw_rectlist(ctx, &clear_rect, layers);
}
/* Now set the mts we cleared to INTEL_FAST_CLEAR_STATE_CLEAR so we'll
* resolve them eventually.
*/
for (unsigned buf = 0; buf < fb->_NumColorDrawBuffers; buf++) {
struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buf];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
int index = fb->_ColorDrawBufferIndexes[buf];
if ((1 << index) & fast_clear_buffers)
irb->mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_CLEAR;
}
bail_to_meta:
/* Dirty _NEW_BUFFERS so we reemit SURFACE_STATE which sets the fast clear
* color before resolve and sets irb->mt->fast_clear_state to UNRESOLVED if
* we render to it.
*/
brw->NewGLState |= _NEW_BUFFERS;
/* Set the custom state back to normal and dirty the same bits as above */
use_rectlist(brw, false);
_mesa_meta_end(ctx);
/* From BSpec: Render Target Fast Clear:
*
* After Render target fast clear, pipe-control with color cache
* write-flush must be issued before sending any DRAW commands on that
* render target.
*/
intel_batchbuffer_emit_mi_flush(brw);
/* If we had to fall back to plain clear for any buffers, clear those now
* by calling into meta.
*/
out:
if (plain_clear_buffers)
_mesa_meta_glsl_Clear(&brw->ctx, plain_clear_buffers);
return true;
}
bool
brw_blorp_clear_color(struct brw_context *brw, struct gl_framebuffer *fb,
bool partial_clear)
{
struct gl_context *ctx = &brw->ctx;
/* The constant color clear code doesn't work for multisampled surfaces, so
* we need to support falling back to other clear mechanisms.
* Unfortunately, our clear code is based on a bitmask that doesn't
* distinguish individual color attachments, so we walk the attachments to
* see if any require fallback, and fall back for all if any of them need
* to.
*/
for (unsigned buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
if (irb && irb->mt->msaa_layout != INTEL_MSAA_LAYOUT_NONE)
return false;
}
for (unsigned buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
/* If this is an ES2 context or GL_ARB_ES2_compatibility is supported,
* the framebuffer can be complete with some attachments missing. In
* this case the _ColorDrawBuffers pointer will be NULL.
*/
if (rb == NULL)
continue;
brw_blorp_clear_params params(brw, fb, rb, ctx->Color.ColorMask[buf],
partial_clear);
bool is_fast_clear =
(params.fast_clear_op == GEN7_FAST_CLEAR_OP_FAST_CLEAR);
if (is_fast_clear) {
/* Record the clear color in the miptree so that it will be
* programmed in SURFACE_STATE by later rendering and resolve
* operations.
*/
uint32_t new_color_value =
compute_fast_clear_color_bits(&ctx->Color.ClearColor);
if (irb->mt->fast_clear_color_value != new_color_value) {
irb->mt->fast_clear_color_value = new_color_value;
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}
/* If the buffer is already in INTEL_MCS_STATE_CLEAR, the clear is
* redundant and can be skipped.
*/
if (irb->mt->mcs_state == INTEL_MCS_STATE_CLEAR)
continue;
/* If the MCS buffer hasn't been allocated yet, we need to allocate
* it now.
*/
if (!irb->mt->mcs_mt) {
if (!intel_miptree_alloc_non_msrt_mcs(brw, irb->mt)) {
/* MCS allocation failed--probably this will only happen in
* out-of-memory conditions. But in any case, try to recover
* by falling back to a non-blorp clear technique.
*/
return false;
}
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}
}
DBG("%s to mt %p level %d layer %d\n", __FUNCTION__,
irb->mt, irb->mt_level, irb->mt_layer);
brw_blorp_exec(brw, ¶ms);
if (is_fast_clear) {
/* Now that the fast clear has occurred, put the buffer in
* INTEL_MCS_STATE_CLEAR so that we won't waste time doing redundant
* clears.
*/
irb->mt->mcs_state = INTEL_MCS_STATE_CLEAR;
}
}
return true;
}
