1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#pragma once
#include <mbgl/gfx/context.hpp>
#include <mbgl/gl/features.hpp>
#include <mbgl/gl/object.hpp>
#include <mbgl/gl/state.hpp>
#include <mbgl/gl/value.hpp>
#include <mbgl/gl/framebuffer.hpp>
#include <mbgl/gl/vertex_array.hpp>
#include <mbgl/gl/types.hpp>
#include <mbgl/gfx/draw_mode.hpp>
#include <mbgl/gfx/depth_mode.hpp>
#include <mbgl/gfx/stencil_mode.hpp>
#include <mbgl/gfx/color_mode.hpp>
#include <mbgl/platform/gl_functions.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <functional>
#include <memory>
#include <vector>
#include <array>
#include <string>
namespace mbgl {
namespace gl {
constexpr size_t TextureMax = 64;
using ProcAddress = void (*)();
class RendererBackend;
namespace extension {
class VertexArray;
class Debugging;
class ProgramBinary;
} // namespace extension
class Context final : public gfx::Context {
public:
Context(RendererBackend&);
~Context() override;
Context(const Context&) = delete;
Context& operator=(const Context& other) = delete;
void initializeExtensions(const std::function<gl::ProcAddress(const char*)>&);
void enableDebugging();
UniqueShader createShader(ShaderType type, const std::initializer_list<const char*>& sources);
UniqueProgram createProgram(ShaderID vertexShader, ShaderID fragmentShader);
UniqueProgram createProgram(BinaryProgramFormat binaryFormat, const std::string& binaryProgram);
void verifyProgramLinkage(ProgramID);
void linkProgram(ProgramID);
UniqueTexture createUniqueTexture();
#if MBGL_HAS_BINARY_PROGRAMS
bool supportsProgramBinaries() const;
#else
constexpr static bool supportsProgramBinaries() { return false; }
#endif
optional<std::pair<BinaryProgramFormat, std::string>> getBinaryProgram(ProgramID) const;
Framebuffer createFramebuffer(const gfx::Renderbuffer<gfx::RenderbufferPixelType::RGBA>&,
const gfx::Renderbuffer<gfx::RenderbufferPixelType::DepthStencil>&);
Framebuffer createFramebuffer(const gfx::Renderbuffer<gfx::RenderbufferPixelType::RGBA>&);
Framebuffer createFramebuffer(const gfx::Texture&,
const gfx::Renderbuffer<gfx::RenderbufferPixelType::DepthStencil>&);
Framebuffer createFramebuffer(const gfx::Texture&);
Framebuffer createFramebuffer(const gfx::Texture&,
const gfx::Renderbuffer<gfx::RenderbufferPixelType::Depth>&);
template <typename Image,
gfx::TexturePixelType format = Image::channels == 4 ? gfx::TexturePixelType::RGBA
: gfx::TexturePixelType::Alpha>
Image readFramebuffer(const Size size, bool flip = true) {
static_assert(Image::channels == (format == gfx::TexturePixelType::RGBA ? 4 : 1),
"image format mismatch");
return { size, readFramebuffer(size, format, flip) };
}
#if not MBGL_USE_GLES2
template <typename Image>
void drawPixels(const Image& image) {
auto format = image.channels == 4 ? gfx::TexturePixelType::RGBA : gfx::TexturePixelType::Alpha;
drawPixels(image.size, image.data.get(), format);
}
#endif // MBGL_USE_GLES2
void clear(optional<mbgl::Color> color,
optional<float> depth,
optional<int32_t> stencil);
void setDepthMode(const gfx::DepthMode&);
void setStencilMode(const gfx::StencilMode&);
void setColorMode(const gfx::ColorMode&);
void setCullFaceMode(const gfx::CullFaceMode&);
void draw(const gfx::DrawMode&,
std::size_t indexOffset,
std::size_t indexLength);
// Actually remove the objects we marked as abandoned with the above methods.
// Only call this while the OpenGL context is exclusive to this thread.
void performCleanup() override;
// Drain pools and remove abandoned objects, in preparation for destroying the store.
// Only call this while the OpenGL context is exclusive to this thread.
void reset();
bool empty() const {
return pooledTextures.empty()
&& abandonedPrograms.empty()
&& abandonedShaders.empty()
&& abandonedBuffers.empty()
&& abandonedTextures.empty()
&& abandonedVertexArrays.empty()
&& abandonedFramebuffers.empty();
}
void setDirtyState();
extension::Debugging* getDebuggingExtension() const {
return debugging.get();
}
extension::VertexArray* getVertexArrayExtension() const {
return vertexArray.get();
}
void setCleanupOnDestruction(bool cleanup) {
cleanupOnDestruction = cleanup;
}
private:
RendererBackend& backend;
bool cleanupOnDestruction = true;
std::unique_ptr<extension::Debugging> debugging;
std::unique_ptr<extension::VertexArray> vertexArray;
#if MBGL_HAS_BINARY_PROGRAMS
std::unique_ptr<extension::ProgramBinary> programBinary;
#endif
public:
State<value::ActiveTextureUnit> activeTextureUnit;
State<value::BindFramebuffer> bindFramebuffer;
State<value::Viewport> viewport;
State<value::ScissorTest> scissorTest;
std::array<State<value::BindTexture>, 2> texture;
State<value::Program> program;
State<value::BindVertexBuffer> vertexBuffer;
State<value::BindVertexArray, const Context&> bindVertexArray { *this };
VertexArrayState globalVertexArrayState { UniqueVertexArray(0, { this }) };
State<value::PixelStorePack> pixelStorePack;
State<value::PixelStoreUnpack> pixelStoreUnpack;
#if not MBGL_USE_GLES2
State<value::PixelZoom> pixelZoom;
State<value::RasterPos> rasterPos;
State<value::PixelTransferDepth> pixelTransferDepth;
State<value::PixelTransferStencil> pixelTransferStencil;
#endif // MBGL_USE_GLES2
private:
State<value::StencilFunc> stencilFunc;
State<value::StencilMask> stencilMask;
State<value::StencilTest> stencilTest;
State<value::StencilOp> stencilOp;
State<value::DepthRange> depthRange;
State<value::DepthMask> depthMask;
State<value::DepthTest> depthTest;
State<value::DepthFunc> depthFunc;
State<value::Blend> blend;
State<value::BlendEquation> blendEquation;
State<value::BlendFunc> blendFunc;
State<value::BlendColor> blendColor;
State<value::ColorMask> colorMask;
State<value::ClearDepth> clearDepth;
State<value::ClearColor> clearColor;
State<value::ClearStencil> clearStencil;
State<value::LineWidth> lineWidth;
State<value::BindRenderbuffer> bindRenderbuffer;
State<value::CullFace> cullFace;
State<value::CullFaceSide> cullFaceSide;
State<value::CullFaceWinding> cullFaceWinding;
#if not MBGL_USE_GLES2
State<value::PointSize> pointSize;
#endif // MBGL_USE_GLES2
std::unique_ptr<gfx::VertexBufferResource> createVertexBufferResource(const void* data, std::size_t size, const gfx::BufferUsageType) override;
void updateVertexBufferResource(gfx::VertexBufferResource&, const void* data, std::size_t size) override;
std::unique_ptr<gfx::IndexBufferResource> createIndexBufferResource(const void* data, std::size_t size, const gfx::BufferUsageType) override;
void updateIndexBufferResource(gfx::IndexBufferResource&, const void* data, std::size_t size) override;
std::unique_ptr<gfx::TextureResource> createTextureResource(Size, const void* data, gfx::TexturePixelType, gfx::TextureChannelDataType) override;
void updateTextureResource(gfx::TextureResource&, Size, const void* data, gfx::TexturePixelType, gfx::TextureChannelDataType) override;
void updateTextureResourceSub(gfx::TextureResource&, const uint16_t xOffset, const uint16_t yOffset, Size, const void* data, gfx::TexturePixelType, gfx::TextureChannelDataType) override;
std::unique_ptr<gfx::OffscreenTexture> createOffscreenTexture(
Size, gfx::TextureChannelDataType = gfx::TextureChannelDataType::UnsignedByte) override;
std::unique_ptr<gfx::OffscreenTexture> createOffscreenTexture(
Size,
gfx::Renderbuffer<gfx::RenderbufferPixelType::Depth>&,
gfx::TextureChannelDataType = gfx::TextureChannelDataType::UnsignedByte) override;
std::unique_ptr<gfx::RenderbufferResource> createRenderbufferResource(gfx::RenderbufferPixelType, Size size) override;
std::unique_ptr<gfx::DrawScopeResource> createDrawScopeResource() override;
UniqueFramebuffer createFramebuffer();
std::unique_ptr<uint8_t[]> readFramebuffer(Size, gfx::TexturePixelType, bool flip);
#if not MBGL_USE_GLES2
void drawPixels(Size size, const void* data, gfx::TexturePixelType);
#endif // MBGL_USE_GLES2
VertexArray createVertexArray();
bool supportsVertexArrays() const;
std::unique_ptr<gfx::CommandEncoder> createCommandEncoder() override;
friend detail::ProgramDeleter;
friend detail::ShaderDeleter;
friend detail::BufferDeleter;
friend detail::TextureDeleter;
friend detail::VertexArrayDeleter;
friend detail::FramebufferDeleter;
friend detail::RenderbufferDeleter;
std::vector<TextureID> pooledTextures;
std::vector<ProgramID> abandonedPrograms;
std::vector<ShaderID> abandonedShaders;
std::vector<BufferID> abandonedBuffers;
std::vector<TextureID> abandonedTextures;
std::vector<VertexArrayID> abandonedVertexArrays;
std::vector<FramebufferID> abandonedFramebuffers;
std::vector<RenderbufferID> abandonedRenderbuffers;
public:
// For testing
bool disableVAOExtension = false;
#if not defined(NDEBUG)
public:
void visualizeStencilBuffer() override;
void visualizeDepthBuffer(float depthRangeSize) override;
#endif
void clearStencilBuffer(int32_t) override;
};
} // namespace gl
} // namespace mbgl
|
