| /* |
| * Copyright 2003 VMware, Inc. |
| * Copyright 2009, 2012 Intel Corporation. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include "main/mtypes.h" |
| #include "main/condrender.h" |
| #include "swrast/swrast.h" |
| #include "drivers/common/meta.h" |
| |
| #include "intel_batchbuffer.h" |
| #include "intel_blit.h" |
| #include "intel_fbo.h" |
| #include "intel_mipmap_tree.h" |
| |
| #include "brw_context.h" |
| #include "brw_blorp.h" |
| |
| #define FILE_DEBUG_FLAG DEBUG_BLIT |
| |
| static const char *buffer_names[] = { |
| [BUFFER_FRONT_LEFT] = "front", |
| [BUFFER_BACK_LEFT] = "back", |
| [BUFFER_FRONT_RIGHT] = "front right", |
| [BUFFER_BACK_RIGHT] = "back right", |
| [BUFFER_DEPTH] = "depth", |
| [BUFFER_STENCIL] = "stencil", |
| [BUFFER_ACCUM] = "accum", |
| [BUFFER_AUX0] = "aux0", |
| [BUFFER_COLOR0] = "color0", |
| [BUFFER_COLOR1] = "color1", |
| [BUFFER_COLOR2] = "color2", |
| [BUFFER_COLOR3] = "color3", |
| [BUFFER_COLOR4] = "color4", |
| [BUFFER_COLOR5] = "color5", |
| [BUFFER_COLOR6] = "color6", |
| [BUFFER_COLOR7] = "color7", |
| }; |
| |
| static void |
| debug_mask(const char *name, GLbitfield mask) |
| { |
| GLuint i; |
| |
| if (unlikely(INTEL_DEBUG & DEBUG_BLIT)) { |
| DBG("%s clear:", name); |
| for (i = 0; i < BUFFER_COUNT; i++) { |
| if (mask & (1 << i)) |
| DBG(" %s", buffer_names[i]); |
| } |
| DBG("\n"); |
| } |
| } |
| |
| /** |
| * Returns true if the scissor is a noop (cuts out nothing). |
| */ |
| static bool |
| noop_scissor(struct gl_framebuffer *fb) |
| { |
| return fb->_Xmin <= 0 && |
| fb->_Ymin <= 0 && |
| fb->_Xmax >= fb->Width && |
| fb->_Ymax >= fb->Height; |
| } |
| |
| /** |
| * Implements fast depth clears on gen6+. |
| * |
| * Fast clears basically work by setting a flag in each of the subspans |
| * represented in the HiZ buffer that says "When you need the depth values for |
| * this subspan, it's the hardware's current clear value." Then later rendering |
| * can just use the static clear value instead of referencing memory. |
| * |
| * The tricky part of the implementation is that you have to have the clear |
| * value that was used on the depth buffer in place for all further rendering, |
| * at least until a resolve to the real depth buffer happens. |
| */ |
| static bool |
| brw_fast_clear_depth(struct gl_context *ctx) |
| { |
| struct brw_context *brw = brw_context(ctx); |
| struct gl_framebuffer *fb = ctx->DrawBuffer; |
| struct intel_renderbuffer *depth_irb = |
| intel_get_renderbuffer(fb, BUFFER_DEPTH); |
| struct intel_mipmap_tree *mt = depth_irb->mt; |
| struct gl_renderbuffer_attachment *depth_att = &fb->Attachment[BUFFER_DEPTH]; |
| |
| if (brw->gen < 6) |
| return false; |
| |
| if (!intel_renderbuffer_has_hiz(depth_irb)) |
| return false; |
| |
| /* We only handle full buffer clears -- otherwise you'd have to track whether |
| * a previous clear had happened at a different clear value and resolve it |
| * first. |
| */ |
| if ((ctx->Scissor.EnableFlags & 1) && !noop_scissor(fb)) { |
| perf_debug("Failed to fast clear %dx%d depth because of scissors. " |
| "Possible 5%% performance win if avoided.\n", |
| mt->logical_width0, mt->logical_height0); |
| return false; |
| } |
| |
| uint32_t depth_clear_value; |
| switch (mt->format) { |
| case MESA_FORMAT_Z32_FLOAT_S8X24_UINT: |
| case MESA_FORMAT_Z24_UNORM_S8_UINT: |
| /* From the Sandy Bridge PRM, volume 2 part 1, page 314: |
| * |
| * "[DevSNB+]: Several cases exist where Depth Buffer Clear cannot be |
| * enabled (the legacy method of clearing must be performed): |
| * |
| * - If the depth buffer format is D32_FLOAT_S8X24_UINT or |
| * D24_UNORM_S8_UINT. |
| */ |
| return false; |
| |
| case MESA_FORMAT_Z_FLOAT32: |
| depth_clear_value = float_as_int(ctx->Depth.Clear); |
| break; |
| |
| case MESA_FORMAT_Z_UNORM16: |
| /* From the Sandy Bridge PRM, volume 2 part 1, page 314: |
| * |
| * "[DevSNB+]: Several cases exist where Depth Buffer Clear cannot be |
| * enabled (the legacy method of clearing must be performed): |
| * |
| * - DevSNB{W/A}]: When depth buffer format is D16_UNORM and the |
| * width of the map (LOD0) is not multiple of 16, fast clear |
| * optimization must be disabled. |
| */ |
| if (brw->gen == 6 && |
| (minify(mt->physical_width0, |
| depth_irb->mt_level - mt->first_level) % 16) != 0) |
| return false; |
| /* FALLTHROUGH */ |
| |
| default: |
| if (brw->gen >= 8) |
| depth_clear_value = float_as_int(ctx->Depth.Clear); |
| else |
| depth_clear_value = fb->_DepthMax * ctx->Depth.Clear; |
| break; |
| } |
| |
| /* If we're clearing to a new clear value, then we need to resolve any clear |
| * flags out of the HiZ buffer into the real depth buffer. |
| */ |
| if (mt->depth_clear_value != depth_clear_value) { |
| intel_miptree_all_slices_resolve_depth(brw, mt); |
| mt->depth_clear_value = depth_clear_value; |
| } |
| |
| /* From the Sandy Bridge PRM, volume 2 part 1, page 313: |
| * |
| * "If other rendering operations have preceded this clear, a |
| * PIPE_CONTROL with write cache flush enabled and Z-inhibit disabled |
| * must be issued before the rectangle primitive used for the depth |
| * buffer clear operation. |
| */ |
| brw_emit_mi_flush(brw); |
| |
| if (fb->MaxNumLayers > 0) { |
| for (unsigned layer = 0; layer < depth_irb->layer_count; layer++) { |
| intel_hiz_exec(brw, mt, depth_irb->mt_level, |
| depth_irb->mt_layer + layer, |
| BLORP_HIZ_OP_DEPTH_CLEAR); |
| } |
| } else { |
| intel_hiz_exec(brw, mt, depth_irb->mt_level, depth_irb->mt_layer, |
| BLORP_HIZ_OP_DEPTH_CLEAR); |
| } |
| |
| if (brw->gen == 6) { |
| /* From the Sandy Bridge PRM, volume 2 part 1, page 314: |
| * |
| * "DevSNB, DevSNB-B{W/A}]: Depth buffer clear pass must be followed |
| * by a PIPE_CONTROL command with DEPTH_STALL bit set and Then |
| * followed by Depth FLUSH' |
| */ |
| brw_emit_mi_flush(brw); |
| } |
| |
| /* Now, the HiZ buffer contains data that needs to be resolved to the depth |
| * buffer. |
| */ |
| intel_renderbuffer_att_set_needs_depth_resolve(depth_att); |
| |
| return true; |
| } |
| |
| /** |
| * Called by ctx->Driver.Clear. |
| */ |
| static void |
| brw_clear(struct gl_context *ctx, GLbitfield mask) |
| { |
| struct brw_context *brw = brw_context(ctx); |
| struct gl_framebuffer *fb = ctx->DrawBuffer; |
| bool partial_clear = ctx->Scissor.EnableFlags && !noop_scissor(fb); |
| |
| if (!_mesa_check_conditional_render(ctx)) |
| return; |
| |
| if (mask & (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT)) { |
| brw->front_buffer_dirty = true; |
| } |
| |
| intel_prepare_render(brw); |
| brw_workaround_depthstencil_alignment(brw, partial_clear ? 0 : mask); |
| |
| if (mask & BUFFER_BIT_DEPTH) { |
| if (brw_fast_clear_depth(ctx)) { |
| DBG("fast clear: depth\n"); |
| mask &= ~BUFFER_BIT_DEPTH; |
| } |
| } |
| |
| if (mask & BUFFER_BIT_STENCIL) { |
| struct intel_renderbuffer *stencil_irb = |
| intel_get_renderbuffer(fb, BUFFER_STENCIL); |
| struct intel_mipmap_tree *mt = stencil_irb->mt; |
| if (mt && mt->stencil_mt) |
| mt->stencil_mt->r8stencil_needs_update = true; |
| } |
| |
| /* BLORP is currently only supported on Gen6+. */ |
| if (brw->gen >= 6 && (mask & BUFFER_BITS_COLOR)) { |
| const bool encode_srgb = ctx->Color.sRGBEnabled; |
| if (brw_blorp_clear_color(brw, fb, mask, partial_clear, encode_srgb)) { |
| debug_mask("blorp color", mask & BUFFER_BITS_COLOR); |
| mask &= ~BUFFER_BITS_COLOR; |
| } |
| } |
| |
| GLbitfield tri_mask = mask & (BUFFER_BITS_COLOR | |
| BUFFER_BIT_STENCIL | |
| BUFFER_BIT_DEPTH); |
| |
| if (tri_mask) { |
| debug_mask("tri", tri_mask); |
| mask &= ~tri_mask; |
| |
| if (ctx->API == API_OPENGLES) { |
| _mesa_meta_Clear(&brw->ctx, tri_mask); |
| } else { |
| _mesa_meta_glsl_Clear(&brw->ctx, tri_mask); |
| } |
| } |
| |
| /* Any strange buffers get passed off to swrast */ |
| if (mask) { |
| debug_mask("swrast", mask); |
| _swrast_Clear(ctx, mask); |
| } |
| } |
| |
| |
| void |
| intelInitClearFuncs(struct dd_function_table *functions) |
| { |
| functions->Clear = brw_clear; |
| } |