1 /*
2 * Copyright 2017 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "src/gpu/ganesh/ops/ClearOp.h"
9
10 #include "include/private/base/SkAssert.h"
11 #include "src/gpu/ganesh/GrOpFlushState.h"
12 #include "src/gpu/ganesh/GrOpsRenderPass.h"
13
14 namespace {
15
contains_scissor(const GrScissorState & a,const GrScissorState & b)16 bool contains_scissor(const GrScissorState& a, const GrScissorState& b) {
17 return !a.enabled() || (b.enabled() && a.rect().contains(b.rect()));
18 }
19
20 } // anonymous namespace
21
22 namespace skgpu::ganesh {
23
MakeColor(GrRecordingContext * context,const GrScissorState & scissor,std::array<float,4> color)24 GrOp::Owner ClearOp::MakeColor(GrRecordingContext* context,
25 const GrScissorState& scissor,
26 std::array<float, 4> color) {
27 return GrOp::Make<ClearOp>(context, Buffer::kColor, scissor, color, false);
28 }
29
MakeStencilClip(GrRecordingContext * context,const GrScissorState & scissor,bool insideMask)30 GrOp::Owner ClearOp::MakeStencilClip(GrRecordingContext* context,
31 const GrScissorState& scissor,
32 bool insideMask) {
33 return GrOp::Make<ClearOp>(context,
34 Buffer::kStencilClip,
35 scissor,
36 std::array<float, 4>(),
37 insideMask);
38 }
39
ClearOp(Buffer buffer,const GrScissorState & scissor,std::array<float,4> color,bool insideMask)40 ClearOp::ClearOp(Buffer buffer,
41 const GrScissorState& scissor,
42 std::array<float, 4> color,
43 bool insideMask)
44 : GrOp(ClassID())
45 , fScissor(scissor)
46 , fColor(color)
47 , fStencilInsideMask(insideMask)
48 , fBuffer(buffer) {
49 this->setBounds(SkRect::Make(scissor.rect()), HasAABloat::kNo, IsHairline::kNo);
50 }
51
onCombineIfPossible(GrOp * t,SkArenaAlloc *,const GrCaps & caps)52 GrOp::CombineResult ClearOp::onCombineIfPossible(GrOp* t, SkArenaAlloc*, const GrCaps& caps) {
53 auto other = t->cast<ClearOp>();
54
55 if (other->fBuffer == fBuffer) {
56 // This could be much more complicated. Currently we look at cases where the new clear
57 // contains the old clear, or when the new clear is a subset of the old clear and they clear
58 // to the same value (color or stencil mask depending on target).
59 if (contains_scissor(other->fScissor, fScissor)) {
60 fScissor = other->fScissor;
61 fColor = other->fColor;
62 fStencilInsideMask = other->fStencilInsideMask;
63 return CombineResult::kMerged;
64 } else if (other->fColor == fColor && other->fStencilInsideMask == fStencilInsideMask &&
65 contains_scissor(fScissor, other->fScissor)) {
66 return CombineResult::kMerged;
67 }
68 } else if (other->fScissor == fScissor) {
69 // When the scissors are the exact same but the buffers are different, we can combine and
70 // clear both stencil and clear together in onExecute().
71 if (other->fBuffer & Buffer::kColor) {
72 fColor = other->fColor;
73 }
74 if (other->fBuffer & Buffer::kStencilClip) {
75 fStencilInsideMask = other->fStencilInsideMask;
76 }
77 fBuffer = Buffer::kBoth;
78 return CombineResult::kMerged;
79 }
80 return CombineResult::kCannotCombine;
81 }
82
onExecute(GrOpFlushState * state,const SkRect & chainBounds)83 void ClearOp::onExecute(GrOpFlushState* state, const SkRect& chainBounds) {
84 SkASSERT(state->opsRenderPass());
85 if (fBuffer & Buffer::kColor) {
86 state->opsRenderPass()->clear(fScissor, fColor);
87 }
88
89 if (fBuffer & Buffer::kStencilClip) {
90 state->opsRenderPass()->clearStencilClip(fScissor, fStencilInsideMask);
91 }
92 }
93
94 } // namespace skgpu::ganesh
95