1 //
2 // Copyright 2018 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6
7 // Context.inl.h: Defines inline functions of gl::Context class
8 // Has to be included after libANGLE/Context.h when using one
9 // of the defined functions
10
11 #ifndef LIBANGLE_CONTEXT_INL_H_
12 #define LIBANGLE_CONTEXT_INL_H_
13
14 #include "libANGLE/GLES1Renderer.h"
15 #include "libANGLE/renderer/ContextImpl.h"
16
17 #define ANGLE_HANDLE_ERR(X) \
18 (void)(X); \
19 return;
20 #define ANGLE_CONTEXT_TRY(EXPR) ANGLE_TRY_TEMPLATE(EXPR, ANGLE_HANDLE_ERR)
21
22 namespace gl
23 {
24 constexpr angle::PackedEnumMap<PrimitiveMode, GLsizei> kMinimumPrimitiveCounts = {{
25 {PrimitiveMode::Points, 1},
26 {PrimitiveMode::Lines, 2},
27 {PrimitiveMode::LineLoop, 2},
28 {PrimitiveMode::LineStrip, 2},
29 {PrimitiveMode::Triangles, 3},
30 {PrimitiveMode::TriangleStrip, 3},
31 {PrimitiveMode::TriangleFan, 3},
32 {PrimitiveMode::LinesAdjacency, 2},
33 {PrimitiveMode::LineStripAdjacency, 2},
34 {PrimitiveMode::TrianglesAdjacency, 3},
35 {PrimitiveMode::TriangleStripAdjacency, 3},
36 }};
37
MarkTransformFeedbackBufferUsage(const Context * context,GLsizei count,GLsizei instanceCount)38 ANGLE_INLINE void MarkTransformFeedbackBufferUsage(const Context *context,
39 GLsizei count,
40 GLsizei instanceCount)
41 {
42 if (context->getStateCache().isTransformFeedbackActiveUnpaused())
43 {
44 TransformFeedback *transformFeedback = context->getState().getCurrentTransformFeedback();
45 transformFeedback->onVerticesDrawn(context, count, instanceCount);
46 }
47 }
48
MarkShaderStorageBufferUsage(const Context * context)49 ANGLE_INLINE void MarkShaderStorageBufferUsage(const Context *context)
50 {
51 for (size_t index : context->getStateCache().getActiveShaderStorageBufferIndices())
52 {
53 gl::Buffer *buffer = context->getState().getIndexedShaderStorageBuffer(index).get();
54 if (buffer)
55 {
56 buffer->onDataChanged();
57 }
58 }
59 }
60
61 // Return true if the draw is a no-op, else return false.
62 // If there is no active program for the vertex or fragment shader stages, the results of vertex
63 // and fragment shader execution will respectively be undefined. However, this is not
64 // an error. ANGLE will treat this as a no-op.
65 // A no-op draw occurs if the count of vertices is less than the minimum required to
66 // have a valid primitive for this mode (0 for points, 0-1 for lines, 0-2 for tris).
noopDraw(PrimitiveMode mode,GLsizei count)67 ANGLE_INLINE bool Context::noopDraw(PrimitiveMode mode, GLsizei count)
68 {
69 return count < kMinimumPrimitiveCounts[mode];
70 }
71
syncDirtyBits()72 ANGLE_INLINE angle::Result Context::syncDirtyBits()
73 {
74 const State::DirtyBits &dirtyBits = mState.getDirtyBits();
75 ANGLE_TRY(mImplementation->syncState(this, dirtyBits, mAllDirtyBits));
76 mState.clearDirtyBits();
77 return angle::Result::Continue;
78 }
79
syncDirtyBits(const State::DirtyBits & bitMask)80 ANGLE_INLINE angle::Result Context::syncDirtyBits(const State::DirtyBits &bitMask)
81 {
82 const State::DirtyBits &dirtyBits = (mState.getDirtyBits() & bitMask);
83 ANGLE_TRY(mImplementation->syncState(this, dirtyBits, bitMask));
84 mState.clearDirtyBits(dirtyBits);
85 return angle::Result::Continue;
86 }
87
syncDirtyObjects(const State::DirtyObjects & objectMask)88 ANGLE_INLINE angle::Result Context::syncDirtyObjects(const State::DirtyObjects &objectMask)
89 {
90 return mState.syncDirtyObjects(this, objectMask);
91 }
92
prepareForDraw(PrimitiveMode mode)93 ANGLE_INLINE angle::Result Context::prepareForDraw(PrimitiveMode mode)
94 {
95 if (mGLES1Renderer)
96 {
97 ANGLE_TRY(mGLES1Renderer->prepareForDraw(mode, this, &mState));
98 }
99
100 ANGLE_TRY(syncDirtyObjects(mDrawDirtyObjects));
101 ASSERT(!isRobustResourceInitEnabled() ||
102 !mState.getDrawFramebuffer()->hasResourceThatNeedsInit());
103 return syncDirtyBits();
104 }
105
drawArrays(PrimitiveMode mode,GLint first,GLsizei count)106 ANGLE_INLINE void Context::drawArrays(PrimitiveMode mode, GLint first, GLsizei count)
107 {
108 // No-op if count draws no primitives for given mode
109 if (noopDraw(mode, count))
110 {
111 return;
112 }
113
114 ANGLE_CONTEXT_TRY(prepareForDraw(mode));
115 ANGLE_CONTEXT_TRY(mImplementation->drawArrays(this, mode, first, count));
116 MarkTransformFeedbackBufferUsage(this, count, 1);
117 }
118
drawElements(PrimitiveMode mode,GLsizei count,DrawElementsType type,const void * indices)119 ANGLE_INLINE void Context::drawElements(PrimitiveMode mode,
120 GLsizei count,
121 DrawElementsType type,
122 const void *indices)
123 {
124 // No-op if count draws no primitives for given mode
125 if (noopDraw(mode, count))
126 {
127 return;
128 }
129
130 ANGLE_CONTEXT_TRY(prepareForDraw(mode));
131 ANGLE_CONTEXT_TRY(mImplementation->drawElements(this, mode, count, type, indices));
132 }
133
onBufferBindingChange(Context * context)134 ANGLE_INLINE void StateCache::onBufferBindingChange(Context *context)
135 {
136 updateBasicDrawStatesError();
137 updateBasicDrawElementsError();
138 }
139
bindBuffer(BufferBinding target,BufferID buffer)140 ANGLE_INLINE void Context::bindBuffer(BufferBinding target, BufferID buffer)
141 {
142 Buffer *bufferObject =
143 mState.mBufferManager->checkBufferAllocation(mImplementation.get(), buffer);
144 mState.setBufferBinding(this, target, bufferObject);
145 mStateCache.onBufferBindingChange(this);
146 }
147
148 } // namespace gl
149
150 #endif // LIBANGLE_CONTEXT_INL_H_
151