xref: /third_party/skia/src/gpu/GrSimpleMesh.h (revision cb93a386) 
1/*
2 * Copyright 2015 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#ifndef GrSimpleMesh_DEFINED
9#define GrSimpleMesh_DEFINED
10
11#include "src/gpu/GrBuffer.h"
12#include "src/gpu/GrGpuBuffer.h"
13#include "src/gpu/GrOpsRenderPass.h"
14
15class GrGeometryProcessor;
16
17/**
18 * Used to communicate simple (non-instanced, direct) draws from GrOp to GrOpsRenderPass.
19 * TODO: Consider migrating every Op to make the appropriate draw directly on GrOpsRenderPass.
20 */
21struct GrSimpleMesh {
22    void set(sk_sp<const GrBuffer> vertexBuffer, int vertexCount, int baseVertex);
23    void setIndexed(sk_sp<const GrBuffer> indexBuffer, int indexCount, int baseIndex,
24                    uint16_t minIndexValue, uint16_t maxIndexValue, GrPrimitiveRestart,
25                    sk_sp<const GrBuffer> vertexBuffer, int baseVertex);
26    void setIndexedPatterned(sk_sp<const GrBuffer> indexBuffer, int indexCount,
27                             int patternRepeatCount, int maxPatternRepetitionsInIndexBuffer,
28                             sk_sp<const GrBuffer> vertexBuffer, int patternVertexCount,
29                             int baseVertex);
30
31    sk_sp<const GrBuffer> fIndexBuffer;
32    int fIndexCount;
33    int fPatternRepeatCount;
34    int fMaxPatternRepetitionsInIndexBuffer;
35    int fBaseIndex;
36    uint16_t fMinIndexValue;
37    uint16_t fMaxIndexValue;
38    GrPrimitiveRestart fPrimitiveRestart = GrPrimitiveRestart::kNo;
39
40    sk_sp<const GrBuffer> fVertexBuffer;
41    int fVertexCount;
42    int fBaseVertex = 0;
43
44    SkDEBUGCODE(bool fIsInitialized = false;)
45};
46
47inline void GrSimpleMesh::set(sk_sp<const GrBuffer> vertexBuffer, int vertexCount, int baseVertex) {
48    SkASSERT(baseVertex >= 0);
49    fIndexBuffer.reset();
50    fVertexBuffer = std::move(vertexBuffer);
51    fVertexCount = vertexCount;
52    fBaseVertex = baseVertex;
53    SkDEBUGCODE(fIsInitialized = true;)
54}
55
56inline void GrSimpleMesh::setIndexed(sk_sp<const GrBuffer> indexBuffer, int indexCount,
57                                     int baseIndex, uint16_t minIndexValue, uint16_t maxIndexValue,
58                                     GrPrimitiveRestart primitiveRestart,
59                                     sk_sp<const GrBuffer> vertexBuffer, int baseVertex) {
60    SkASSERT(indexBuffer);
61    SkASSERT(indexCount >= 1);
62    SkASSERT(baseIndex >= 0);
63    SkASSERT(maxIndexValue >= minIndexValue);
64    SkASSERT(baseVertex >= 0);
65    fIndexBuffer = std::move(indexBuffer);
66    fIndexCount = indexCount;
67    fPatternRepeatCount = 0;
68    fBaseIndex = baseIndex;
69    fMinIndexValue = minIndexValue;
70    fMaxIndexValue = maxIndexValue;
71    fPrimitiveRestart = primitiveRestart;
72    fVertexBuffer = std::move(vertexBuffer);
73    fBaseVertex = baseVertex;
74    SkDEBUGCODE(fIsInitialized = true;)
75}
76
77inline void GrSimpleMesh::setIndexedPatterned(
78        sk_sp<const GrBuffer> indexBuffer, int indexCount, int patternRepeatCount,
79        int maxPatternRepetitionsInIndexBuffer, sk_sp<const GrBuffer> vertexBuffer,
80        int patternVertexCount, int baseVertex) {
81    SkASSERT(indexBuffer);
82    SkASSERT(indexCount >= 1);
83    SkASSERT(patternVertexCount >= 1);
84    SkASSERT(patternRepeatCount >= 1);
85    SkASSERT(maxPatternRepetitionsInIndexBuffer >= 1);
86    SkASSERT(baseVertex >= 0);
87    fIndexBuffer = std::move(indexBuffer);
88    fIndexCount = indexCount;
89    fPatternRepeatCount = patternRepeatCount;
90    fVertexCount = patternVertexCount;
91    fMaxPatternRepetitionsInIndexBuffer = maxPatternRepetitionsInIndexBuffer;
92    fPrimitiveRestart = GrPrimitiveRestart::kNo;
93    fVertexBuffer = std::move(vertexBuffer);
94    fBaseVertex = baseVertex;
95    SkDEBUGCODE(fIsInitialized = true;)
96}
97
98#endif
99