brw_blorp_clear_params(struct brw_context *brw,
struct gl_framebuffer *fb,
struct gl_renderbuffer *rb,
- GLubyte *color_mask);
+ GLubyte *color_mask,
+ bool partial_clear);
virtual uint32_t get_wm_prog(struct brw_context *brw,
brw_blorp_prog_data **prog_data) const;
ralloc_free(mem_ctx);
}
+
+/**
+ * Determine if fast color clear supports the given clear color.
+ *
+ * Fast color clear can only clear to color values of 1.0 or 0.0. At the
+ * moment we only support floating point, unorm, and snorm buffers.
+ */
+static bool
+is_color_fast_clear_compatible(struct intel_context *intel,
+ gl_format format,
+ const union gl_color_union *color)
+{
+ if (_mesa_is_format_integer_color(format))
+ return false;
+
+ for (int i = 0; i < 4; i++) {
+ if (color->f[i] != 0.0 && color->f[i] != 1.0) {
+ perf_debug("Clear color unsupported by fast color clear. "
+ "Falling back to slow clear.");
+ return false;
+ }
+ }
+ return true;
+}
+
+
+/**
+ * Convert the given color to a bitfield suitable for ORing into DWORD 7 of
+ * SURFACE_STATE.
+ */
+static uint32_t
+compute_fast_clear_color_bits(const union gl_color_union *color)
+{
+ uint32_t bits = 0;
+ for (int i = 0; i < 4; i++) {
+ if (color->f[i] != 0.0)
+ bits |= 1 << (GEN7_SURFACE_CLEAR_COLOR_SHIFT + (3 - i));
+ }
+ return bits;
+}
+
+
brw_blorp_clear_params::brw_blorp_clear_params(struct brw_context *brw,
struct gl_framebuffer *fb,
struct gl_renderbuffer *rb,
- GLubyte *color_mask)
+ GLubyte *color_mask,
+ bool partial_clear)
{
struct intel_context *intel = &brw->intel;
struct gl_context *ctx = &intel->ctx;
wm_prog_key.use_simd16_replicated_data = false;
}
}
+
+ /* If we can do this as a fast color clear, do so. */
+ if (irb->mt->mcs_state != INTEL_MCS_STATE_NONE && !partial_clear &&
+ wm_prog_key.use_simd16_replicated_data &&
+ is_color_fast_clear_compatible(intel, format, &ctx->Color.ClearColor)) {
+ memset(push_consts, 0xff, 4*sizeof(float));
+ fast_clear_op = GEN7_FAST_CLEAR_OP_FAST_CLEAR;
+
+ /* From the Ivy Bridge PRM, Vol2 Part1 11.7 "MCS Buffer for Render
+ * Target(s)", beneath the "Fast Color Clear" bullet (p327):
+ *
+ * Clear pass must have a clear rectangle that must follow alignment
+ * rules in terms of pixels and lines as shown in the table
+ * below. Further, the clear-rectangle height and width must be
+ * multiple of the following dimensions. If the height and width of
+ * the render target being cleared do not meet these requirements,
+ * an MCS buffer can be created such that it follows the requirement
+ * and covers the RT.
+ *
+ * The alignment size in the table that follows is related to the
+ * alignment size returned by intel_get_non_msrt_mcs_alignment(), but
+ * with X alignment multiplied by 16 and Y alignment multiplied by 32.
+ */
+ unsigned x_align, y_align;
+ intel_get_non_msrt_mcs_alignment(intel, irb->mt, &x_align, &y_align);
+ x_align *= 16;
+ y_align *= 32;
+ x0 = ROUND_DOWN_TO(x0, x_align);
+ y0 = ROUND_DOWN_TO(y0, y_align);
+ x1 = ALIGN(x1, x_align);
+ y1 = ALIGN(y1, y_align);
+
+ /* From the Ivy Bridge PRM, Vol2 Part1 11.7 "MCS Buffer for Render
+ * Target(s)", beneath the "Fast Color Clear" bullet (p327):
+ *
+ * In order to optimize the performance MCS buffer (when bound to 1X
+ * RT) clear similarly to MCS buffer clear for MSRT case, clear rect
+ * is required to be scaled by the following factors in the
+ * horizontal and vertical directions:
+ *
+ * The X and Y scale down factors in the table that follows are each
+ * equal to half the alignment value computed above.
+ */
+ unsigned x_scaledown = x_align / 2;
+ unsigned y_scaledown = y_align / 2;
+ x0 /= x_scaledown;
+ y0 /= y_scaledown;
+ x1 /= x_scaledown;
+ y1 /= y_scaledown;
+ }
}
uint32_t
extern "C" {
bool
-brw_blorp_clear_color(struct intel_context *intel, struct gl_framebuffer *fb)
+brw_blorp_clear_color(struct intel_context *intel, struct gl_framebuffer *fb,
+ bool partial_clear)
{
struct gl_context *ctx = &intel->ctx;
struct brw_context *brw = brw_context(ctx);
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
if (rb == NULL)
continue;
- brw_blorp_clear_params params(brw, fb, rb, ctx->Color.ColorMask[buf]);
+ 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(intel, 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;
+ }
+ }
+
brw_blorp_exec(intel, ¶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;
#endif
}
+
+bool
+intel_miptree_alloc_non_msrt_mcs(struct intel_context *intel,
+ struct intel_mipmap_tree *mt)
+{
+#ifdef I915
+ assert(!"MCS not supported on i915");
+ return false;
+#else
+ assert(mt->mcs_mt == NULL);
+
+ /* The format of the MCS buffer is opaque to the driver; all that matters
+ * is that we get its size and pitch right. We'll pretend that the format
+ * is R32. Since an MCS tile covers 128 blocks horizontally, and a Y-tiled
+ * R32 buffer is 32 pixels across, we'll need to scale the width down by
+ * the block width and then a further factor of 4. Since an MCS tile
+ * covers 256 blocks vertically, and a Y-tiled R32 buffer is 32 rows high,
+ * we'll need to scale the height down by the block height and then a
+ * further factor of 8.
+ */
+ const gl_format format = MESA_FORMAT_R_UINT32;
+ unsigned block_width_px;
+ unsigned block_height;
+ intel_get_non_msrt_mcs_alignment(intel, mt, &block_width_px, &block_height);
+ unsigned width_divisor = block_width_px * 4;
+ unsigned height_divisor = block_height * 8;
+ unsigned mcs_width =
+ ALIGN(mt->logical_width0, width_divisor) / width_divisor;
+ unsigned mcs_height =
+ ALIGN(mt->logical_height0, height_divisor) / height_divisor;
+ assert(mt->logical_depth0 == 1);
+ mt->mcs_mt = intel_miptree_create(intel,
+ mt->target,
+ format,
+ mt->first_level,
+ mt->last_level,
+ mcs_width,
+ mcs_height,
+ mt->logical_depth0,
+ true,
+ 0 /* num_samples */,
+ INTEL_MIPTREE_TILING_Y);
+
+ return mt->mcs_mt;
+#endif
+}
+
+
/**
* Helper for intel_miptree_alloc_hiz() that sets
* \c mt->level[level].slice[layer].has_hiz. Return true if and only if
projects / mesa.git / commitdiff