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#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 (*)();
namespace extension {
class VertexArray;
class Debugging;
class ProgramBinary;
} // namespace extension
class Context final : public gfx::Context {
public:
Context();
~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();
// Flush pending graphics commands. Will block until the pipeline
// is empty. Should be used only with a very good reason because
// it will have a performance impact.
void flush();
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:
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<const gfx::VertexBufferResource> createVertexBufferResource(const void* data, std::size_t size, const gfx::BufferUsageType) override;
void updateVertexBufferResource(const gfx::VertexBufferResource&, const void* data, std::size_t size) override;
std::unique_ptr<const gfx::IndexBufferResource> createIndexBufferResource(const void* data, std::size_t size, const gfx::BufferUsageType) override;
void updateIndexBufferResource(const 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(const gfx::TextureResource&, Size, const void* data, gfx::TexturePixelType, gfx::TextureChannelDataType) override;
void updateTextureResourceSub(const gfx::TextureResource&, const uint16_t xOffset, const uint16_t yOffset, Size, const void* data, gfx::TexturePixelType, gfx::TextureChannelDataType) 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;
};
} // namespace gl
} // namespace mbgl
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