2 * Copyright 2013 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef GrGLVertexArray_DEFINED
9 #define GrGLVertexArray_DEFINED
11 #include "GrGpuResource.h"
12 #include "GrTypesPriv.h"
13 #include "gl/GrGLDefines.h"
14 #include "gl/GrGLFunctions.h"
18 class GrGLVertexBuffer;
19 class GrGLIndexBuffer;
22 struct GrGLAttribLayout {
25 GrGLboolean fNormalized;
28 static inline const GrGLAttribLayout& GrGLAttribTypeToLayout(GrVertexAttribType type) {
29 SkASSERT(type >= 0 && type < kGrVertexAttribTypeCount);
30 static const GrGLAttribLayout kLayouts[kGrVertexAttribTypeCount] = {
31 {1, GR_GL_FLOAT, false}, // kFloat_GrVertexAttribType
32 {2, GR_GL_FLOAT, false}, // kVec2f_GrVertexAttribType
33 {3, GR_GL_FLOAT, false}, // kVec3f_GrVertexAttribType
34 {4, GR_GL_FLOAT, false}, // kVec4f_GrVertexAttribType
35 {4, GR_GL_UNSIGNED_BYTE, true}, // kVec4ub_GrVertexAttribType
37 GR_STATIC_ASSERT(0 == kFloat_GrVertexAttribType);
38 GR_STATIC_ASSERT(1 == kVec2f_GrVertexAttribType);
39 GR_STATIC_ASSERT(2 == kVec3f_GrVertexAttribType);
40 GR_STATIC_ASSERT(3 == kVec4f_GrVertexAttribType);
41 GR_STATIC_ASSERT(4 == kVec4ub_GrVertexAttribType);
42 GR_STATIC_ASSERT(SK_ARRAY_COUNT(kLayouts) == kGrVertexAttribTypeCount);
43 return kLayouts[type];
47 * This sets and tracks the vertex attribute array state. It is used internally by GrGLVertexArray
48 * (below) but is separate because it is also used to track the state of vertex array object 0.
50 class GrGLAttribArrayState {
52 explicit GrGLAttribArrayState(int arrayCount = 0) {
53 this->resize(arrayCount);
56 void resize(int newCount) {
57 fAttribArrayStates.resize_back(newCount);
58 for (int i = 0; i < newCount; ++i) {
59 fAttribArrayStates[i].invalidate();
64 * This function enables and sets vertex attrib state for the specified attrib index. It is
65 * assumed that the GrGLAttribArrayState is tracking the state of the currently bound vertex
68 void set(const GrGpuGL*,
73 GrGLboolean normalized,
78 * This function disables vertex attribs not present in the mask. It is assumed that the
79 * GrGLAttribArrayState is tracking the state of the currently bound vertex array object.
81 void disableUnusedArrays(const GrGpuGL*, uint64_t usedAttribArrayMask);
84 int count = fAttribArrayStates.count();
85 for (int i = 0; i < count; ++i) {
86 fAttribArrayStates[i].invalidate();
90 void notifyVertexBufferDelete(GrGLuint id) {
91 int count = fAttribArrayStates.count();
92 for (int i = 0; i < count; ++i) {
93 if (fAttribArrayStates[i].fAttribPointerIsValid &&
94 id == fAttribArrayStates[i].fVertexBufferID) {
95 fAttribArrayStates[i].invalidate();
101 * The number of attrib arrays that this object is configured to track.
103 int count() const { return fAttribArrayStates.count(); }
107 * Tracks the state of glVertexAttribArray for an attribute index.
109 struct AttribArrayState {
111 fEnableIsValid = false;
112 fAttribPointerIsValid = false;
116 bool fAttribPointerIsValid;
118 GrGLuint fVertexBufferID;
121 GrGLboolean fNormalized;
126 SkSTArray<16, AttribArrayState, true> fAttribArrayStates;
130 * This class represents an OpenGL vertex array object. It manages the lifetime of the vertex array
131 * and is used to track the state of the vertex array to avoid redundant GL calls.
\13
133 class GrGLVertexArray : public GrGpuResource {
135 GrGLVertexArray(GrGpuGL* gpu, GrGLint id, int attribCount);
138 * Binds this vertex array. If the ID has been deleted or abandoned then NULL is returned.
139 * Otherwise, the GrGLAttribArrayState that is tracking this vertex array's attrib bindings is
142 GrGLAttribArrayState* bind();
145 * This is a version of the above function that also binds an index buffer to the vertex
148 GrGLAttribArrayState* bindWithIndexBuffer(const GrGLIndexBuffer* indexBuffer);
150 void notifyIndexBufferDelete(GrGLuint bufferID);
152 void notifyVertexBufferDelete(GrGLuint id) {
153 fAttribArrays.notifyVertexBufferDelete(id);
156 GrGLuint arrayID() const { return fID; }
158 void invalidateCachedState();
160 virtual size_t gpuMemorySize() const SK_OVERRIDE { return 0; }
163 virtual void onAbandon() SK_OVERRIDE;
165 virtual void onRelease() SK_OVERRIDE;
169 GrGLAttribArrayState fAttribArrays;
170 GrGLuint fIndexBufferID;
171 bool fIndexBufferIDIsValid;
173 typedef GrGpuResource INHERITED;