opengl

.gitignore

@@ -4,3 +4,4 @@ build/
 .ccls-cache/
 compile_commands.json
 .cache/
+temp/

CMakeLists.txt

@@ -17,6 +17,8 @@ if(WITH_GTESTS)
     include(GoogleTest)
 endif()
 
+
+include(${CMAKE_SOURCE_DIR}/cmake/glad.cmake)
 add_definitions(-DPRECISION_FLOAT)
 
 add_subdirectory(source)

cmake/glad.cmake

@@ -0,0 +1,9 @@
+include(${CMAKE_CURRENT_LIST_DIR}/CPM.cmake)
+
+CPMAddPackage(
+    NAME glad
+    GIT_REPOSITORY https://github.com/Dav1dde/glad.git
+    VERSION 0.1.36
+    GIT_PROGRESS TRUE
+    OPTIONS "GLAD_EXPORT ON" "GLAD_INSTALL ON"
+)

source/hyporo/gpu/CMakeLists.txt

@@ -0,0 +1,39 @@
+
+include_directories(
+    ../hyplib
+)
+
+add_library(hyporo-gpu STATIC
+    # Source files
+    buffer.cpp
+    context.cpp
+    shader.cpp
+    opengl/buffer.cpp
+    opengl/context.cpp
+    opengl/shader.cpp
+    opengl/texture.cpp
+    opengl/device.cpp
+    opengl/shader_program.cpp
+    texture.cpp
+    device.cpp
+    shader_program.cpp
+
+    # Header files
+    context.hpp
+    shader.hpp
+    shader_program.hpp
+    buffer.hpp
+    device.hpp
+    texture.hpp
+    opengl/context.hpp
+    opengl/shader.hpp
+    opengl/shader_program.hpp
+    opengl/buffer.hpp
+    opengl/device.hpp
+    opengl/texture.hpp
+)
+
+target_link_libraries(hyporo-gpu
+    glad
+    hyporo-hyplib
+)

source/hyporo/gpu/buffer.cpp

@@ -22,7 +22,14 @@ Buffer::Buffer(DeviceAPI api) :
 Buffer::~Buffer()
 {}
 
-const BufferType Buffer::type() const
+// Member functions
+
+int Buffer::size() const
+{
+    return p_size;
+}
+
+Buffer::BufferType Buffer::type() const
 {
     return p_type;
 }

source/hyporo/gpu/buffer.hpp

@@ -10,6 +10,7 @@ namespace hpr::gpu
 
 class Buffer : public Context
 {
+    friend class Device;
 
 public:
 
@@ -39,9 +40,9 @@ public:
 
     // Member functions
 
-    const int size() const;
+    int size() const;
 
-    const BufferType type() const;
+    BufferType type() const;
 };
 
 } // end namespace hpr::gpu

source/hyporo/gpu/device.cpp

@@ -6,29 +6,147 @@
 namespace hpr::gpu
 {
 
-    Device::Device() :
-        Context {DeviceAPI::Unknown}
-    {}
+Device::Device() :
+    Context {DeviceAPI::Unknown},
+    p_currentVertexBuffer {nullptr},
+    p_currentIndexBuffer {nullptr},
+    p_currentShaderProgram {nullptr}
+{}
 
-    Device::Device(DeviceAPI api) :
-        Context {api}
-    {}
+Device::Device(DeviceAPI api) :
+    Context {api},
+    p_currentVertexBuffer {nullptr},
+    p_currentIndexBuffer {nullptr},
+    p_currentShaderProgram {nullptr}
+{}
 
-    Device::~Device()
-    {}
+Device::~Device()
+{}
 
-    void Device::create(Device **device, DeviceAPI api)
+// Global functions
+
+void Device::create(Device** device, DeviceAPI api)
+{
+    if (device == nullptr)
+        throw "Invalid parameter";
+    if (api == DeviceAPI::Unknown)
+        throw "Invalid parameter";
+
+    *device = nullptr;
+
+    if (api == DeviceAPI::OpenGL)
+        *device = new opengl::Device;
+    else
+        throw "Unsupported device";
+}
+
+// Buffers
+
+void Device::useVertexBuffer(Buffer* buffer, int stride, int offset)
+{
+    if (buffer)
     {
-        if (device == nullptr)
-            throw "Invalid parameter";
-        if (api == DeviceAPI::Unknown)
-            throw "Invalid parameter";
-
-        *device = nullptr;
-
-        if (api == DeviceAPI::OpenGL)
-            *device = new opengl::Device;
+        if (buffer->p_type == Buffer::BufferType::Vertex)
+        {
+            p_currentVertexBuffer = buffer;
+            p_currentVertexBuffer->p_stride = stride;
+        }
         else
-            throw "Unsupported device";
+            throw "Incompatible buffer";
     }
+    else
+        p_currentVertexBuffer = nullptr;
+}
+
+void Device::useIndexBuffer(Buffer* buffer, int offset)
+{
+    if (buffer)
+    {
+        if (buffer->p_type == Buffer::BufferType::Index)
+        {
+            p_currentIndexBuffer = buffer;
+        }
+        else
+            throw "Incompatible buffer";
+    }
+    else
+        p_currentIndexBuffer = nullptr;
+}
+
+void Device::destroyBuffer(Buffer*& buffer)
+{
+    if (!buffer)
+        throw "Invalid parameter";
+
+    for (auto iter = p_buffers.begin(); iter != p_buffers.end(); ++iter)
+        if (&*iter == &*buffer)
+            p_buffers.erase(iter);
+    buffer = nullptr;
+}
+
+// Shaders
+
+void Device::destroyShader(Shader *&shader)
+{
+    if (shader == nullptr)
+        throw "Invalid parameter";
+
+    for (auto iter = p_shaders.begin(); iter != p_shaders.end(); ++iter)
+        if (&*iter == &*shader)
+            p_shaders.erase(iter);
+    shader = nullptr;
+}
+
+// Shader programs
+
+void Device::attachShader(ShaderProgram *program, Shader *shader)
+{
+    if (program == nullptr || shader == nullptr)
+        throw "Invalid parameter";
+    if (program->p_isLinked)
+        throw "Shader program already linked";
+
+    program->p_slots[(int)shader->p_type] = shader;
+}
+
+void Device::linkProgram(ShaderProgram *program)
+{
+    if (program == nullptr)
+        throw "Invalid parameter";
+    if (program->p_isLinked)
+        throw "Shader program already linked";
+
+    program->p_isLinked = true;
+}
+
+void Device::useShaderProgram(ShaderProgram *program)
+{
+    if (program != nullptr)
+        if (!program->p_isLinked)
+            throw "Shader program is not linked";
+
+    p_currentShaderProgram = program;
+}
+
+void Device::destroyShaderProgram(ShaderProgram *&program, bool withShaders)
+{
+    if (program == p_currentShaderProgram)
+        useShaderProgram(nullptr);
+
+    if (withShaders)
+        for (size_t n = 0; n < (size_t)Shader::ShaderType::ShaderTypeCount; n++)
+            destroyShader(program->p_slots[n]);
+    program = nullptr;
+}
+
+// Textures
+
+void Device::destroyTexture(Texture *&texture)
+{
+    for (auto iter = p_textures.begin(); iter != p_textures.end(); ++iter)
+        if (&*iter == &*texture)
+            p_textures.erase(iter);
+    texture = nullptr;
+}
+
 }

source/hyporo/gpu/device.hpp

@@ -21,6 +21,7 @@ public:
     {
         Front,
         Back,
+        FrontAndBack,
         None
     };
 
@@ -31,6 +32,10 @@ protected:
     std::vector<ShaderProgram> p_shaderPrograms;
     std::vector<Texture> p_textures;
 
+    Buffer* p_currentVertexBuffer;
+    Buffer* p_currentIndexBuffer;
+    ShaderProgram* p_currentShaderProgram;
+
 protected:
 
     // Constructors
@@ -64,14 +69,14 @@ public:
     virtual void createIndexBuffer(Buffer **buffer, int size, char* data) = 0;
     virtual void useVertexBuffer(Buffer* buffer, int stride, int offset);
     virtual void useIndexBuffer(Buffer* buffer, int offset);
-    virtual bool destroyBuffer(Buffer*& buffer);
+    virtual void destroyBuffer(Buffer*& buffer);
 
     // Shaders
 
     virtual void createVertexShader(Shader** shader, const std::string& filename, const std::string& label) = 0;
     virtual void createFragmentShader(Shader** shader, const std::string& filename, const std::string& label) = 0;
     virtual void createGeometryShader(Shader** shader, const std::string& filename, const std::string& label) = 0;
-    virtual bool destroyShader(Shader*& shader);
+    virtual void destroyShader(Shader*& shader);
 
     // Shader programs
 
@@ -84,7 +89,7 @@ public:
     // Textures
 
     virtual void createTexture(Texture** texture, const std::string& filename) = 0;
-    virtual void useTexture(Texture* texture, int slot);
+    virtual void useTexture(Texture* texture, int slot) = 0;
     virtual void destroyTexture(Texture*& texture);
 };
 

source/hyporo/gpu/opengl/buffer.cpp

@@ -1,6 +1,8 @@
 
 #include "buffer.hpp"
 
+#include <glad/glad.h>
+
 
 namespace hpr::gpu::opengl
 {
@@ -14,14 +16,16 @@ Buffer::Buffer() :
 Buffer::~Buffer()
 {}
 
-const int Buffer::target() const
+int Buffer::target() const
 {
     switch (p_type)
     {
         case BufferType::Vertex:
             return GL_ARRAY_BUFFER;
         case BufferType::Index:
-            return GL_ELEMENT_INDEX_BUFFER;
+            return GL_ELEMENT_ARRAY_BUFFER;
+        default:
+            return GL_NONE;
     }
 }
 

source/hyporo/gpu/opengl/buffer.hpp

@@ -24,7 +24,7 @@ public:
 
     // Member functions
 
-    const int target() const;
+    int target() const;
 };
 
 }

source/hyporo/gpu/opengl/device.cpp

@@ -1,10 +1,15 @@
 
 #include "device.hpp"
-#include "buffer.hpp
+#include "buffer.hpp"
 #include "shader.hpp"
 #include "shader_program.hpp"
 #include "texture.hpp"
 
+#include "io/io.hpp"
+
+#include <glad/glad.h>
+#include <stdexcept>
+
 
 namespace hpr::gpu::opengl
 {
@@ -17,5 +22,187 @@ Device::Device() :
 Device::~Device()
 {}
 
+// Setup
+
+bool Device::initialize()
+{
+    return p_isInitialized = true;
+}
+
+bool Device::destroy()
+{
+    return p_isInitialized = false;
+}
+
+// State
+
+void Device::faceCulling(bool enableFaceCulling, CullMode faceCullingMode)
+{
+    if (enableFaceCulling)
+        glEnable(GL_CULL_FACE);
+    else
+        glDisable(GL_CULL_FACE);
+
+    switch (faceCullingMode)
+    {
+        case CullMode::Front:
+            glCullFace(GL_FRONT);
+            break;
+        case CullMode::Back:
+            glCullFace(GL_BACK);
+            break;
+        case CullMode::FrontAndBack:
+            glCullFace(GL_FRONT_AND_BACK);
+            break;
+        case CullMode::None:
+            glCullFace(GL_NONE);
+            break;
+    }
+}
+
+void Device::createVertexBuffer(gpu::Buffer **buffer, int size, char *data)
+{
+    if (buffer == nullptr)
+        throw std::invalid_argument("Invalid parameter");
+
+    *buffer = nullptr;
+    p_buffers.emplace_back(opengl::Buffer());
+    opengl::Buffer* newBuffer = dynamic_cast<opengl::Buffer*>(&p_buffers.back());
+
+    newBuffer->p_type = Buffer::BufferType::Vertex;
+    newBuffer->p_size = size;
+
+    glGenVertexArrays(1, &newBuffer->p_vertexArrayIndex);
+    glBindVertexArray(newBuffer->p_vertexArrayIndex);
+
+    glGenBuffers(1, &newBuffer->p_bufferIndex);
+    glBindBuffer(GL_ARRAY_BUFFER, newBuffer->p_bufferIndex);
+    glBufferData(GL_ARRAY_BUFFER, size, (void*)data, GL_STATIC_DRAW);
+
+    *buffer = static_cast<gpu::Buffer*>(newBuffer);
+}
+
+void Device::createIndexBuffer(gpu::Buffer **buffer, int size, char *data)
+{
+    if (buffer == nullptr)
+        throw std::invalid_argument("Invalid parameter");
+
+    *buffer = nullptr;
+    p_buffers.emplace_back(opengl::Buffer());
+    opengl::Buffer* newBuffer = dynamic_cast<opengl::Buffer*>(&p_buffers.back());
+
+    newBuffer->p_type = Buffer::BufferType::Vertex;
+    newBuffer->p_size = size;
+
+    glGenVertexArrays(1, &newBuffer->p_vertexArrayIndex);
+    glBindVertexArray(newBuffer->p_vertexArrayIndex);
+
+    glGenBuffers(1, &newBuffer->p_bufferIndex);
+    glBindBuffer(GL_UNIFORM_BUFFER, newBuffer->p_bufferIndex);
+    glBufferData(GL_UNIFORM_BUFFER, size, (void*)data, GL_STATIC_DRAW);
+
+    *buffer = static_cast<gpu::Buffer*>(newBuffer);
+}
+
+void Device::useVertexBuffer(gpu::Buffer *buffer, int stride, int offset)
+{
+    if (buffer == nullptr)
+    {
+        glBindVertexArray(0);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+    }
+    else
+    {
+        opengl::Buffer* curBuffer = dynamic_cast<opengl::Buffer*>(buffer);
+
+        if (curBuffer->p_type == Buffer::BufferType::Vertex && p_currentVertexBuffer != buffer)
+        {
+            glBindVertexArray(curBuffer->p_vertexArrayIndex);
+            glBindBuffer(GL_ARRAY_BUFFER, curBuffer->p_bufferIndex);
+
+            opengl::Buffer* curIndexBuffer = dynamic_cast<opengl::Buffer*>(p_currentIndexBuffer);
+
+            if (curIndexBuffer != nullptr)
+                glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, curIndexBuffer->p_bufferIndex);
+        }
+    }
+    gpu::Device::useVertexBuffer(buffer, stride, offset);
+}
+
+void Device::useIndexBuffer(gpu::Buffer *buffer, int offset)
+{
+    if (buffer == nullptr)
+    {
+        glBindVertexArray(0);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    }
+    else
+    {
+        opengl::Buffer* curBuffer = dynamic_cast<opengl::Buffer*>(buffer);
+
+        if (curBuffer->p_type == Buffer::BufferType::Index && p_currentVertexBuffer != buffer)
+        {
+            glBindVertexArray(curBuffer->p_vertexArrayIndex);
+            glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, curBuffer->p_bufferIndex);
+        }
+    }
+    gpu::Device::useIndexBuffer(buffer, offset);
+}
+
+void Device::destroyBuffer(gpu::Buffer *&buffer)
+{
+    if (buffer == nullptr)
+        throw std::invalid_argument("Invalid parameter");
+
+    opengl::Buffer* curBuffer = dynamic_cast<opengl::Buffer*>(buffer);
+    glDeleteBuffers(1, &curBuffer->p_bufferIndex);
+
+    if (curBuffer->p_type == Buffer::BufferType::Vertex)
+        glDeleteVertexArrays(1, &curBuffer->p_vertexArrayIndex);
+
+    gpu::Device::destroyBuffer(buffer);
+}
+
+// Shaders
+
+void Device::createVertexShader(gpu::Shader **shader, const std::string &filename, const std::string &label)
+{
+    if (shader == nullptr)
+        throw std::invalid_argument("Invalid parameter");
+
+    *shader = nullptr;
+
+    unsigned int shaderIndex = glCreateShader(GL_VERTEX_SHADER);
+    if (shaderIndex == 0)
+        throw std::runtime_error("Could not create shader");
+
+    File file;
+    file.open(filename, File::Binary | File::Read);
+    std::string content = file.read().str();
+    const char* shaderSource = content.c_str();
+
+    glShaderSource(shaderIndex, 1, &shaderSource, nullptr);
+    GLenum result = glGetError();
+    glCompileShader(shaderIndex);
+
+    int shaderStatus;
+    glGetShaderiv(shaderIndex, GL_COMPILE_STATUS, &shaderStatus);
+    if (!shaderStatus)
+    {
+        char error[2048 + 1];
+        glGetShaderInfoLog(shaderIndex, 2048, nullptr, error);
+
+        throw std::runtime_error(error);
+    }
+
+    p_shaders.emplace_back(opengl::Shader());
+    opengl::Shader* newShader = dynamic_cast<opengl::Shader*>(&p_shaders.back());
+    newShader->p_type = Shader::ShaderType::Vertex;
+    newShader->p_filename = filename;
+    newShader->p_shaderIndex = shaderIndex;
+    newShader->p_label = "VertexShader";
+
+    *shader = static_cast<Shader*>(newShader);
+}
 
 }

source/hyporo/gpu/opengl/device.hpp

@@ -22,6 +22,45 @@ public:
     ~Device();
 
 
+    // Member functions
+
+    // Setup
+
+    bool initialize() override;
+    bool destroy() override;
+
+    // State
+
+    void faceCulling(bool enableFaceCulling, CullMode faceCullingMode = CullMode::None) override;
+
+    // Buffers
+
+    void createVertexBuffer(Buffer **buffer, int size, char* data) override;
+    void createIndexBuffer(Buffer **buffer, int size, char* data) override;
+    void useVertexBuffer(Buffer* buffer, int stride, int offset) override;
+    void useIndexBuffer(Buffer* buffer, int offset) override;
+    void destroyBuffer(Buffer*& buffer) override;
+
+    // Shaders
+
+    void createVertexShader(Shader** shader, const std::string& filename, const std::string& label) override;
+    void createFragmentShader(Shader** shader, const std::string& filename, const std::string& label) override;
+    void createGeometryShader(Shader** shader, const std::string& filename, const std::string& label) override;
+    void destroyShader(Shader*& shader) override;
+
+    // Shader programs
+
+    virtual void createShaderProgram(ShaderProgram** program);
+    virtual void attachShader(ShaderProgram* program, Shader* shader);
+    virtual void linkProgram(ShaderProgram* program);
+    virtual void useShaderProgram(ShaderProgram* program);
+    virtual void destroyShaderProgram(ShaderProgram*& program, bool withShaders = false);
+
+    // Textures
+
+    virtual void createTexture(Texture** texture, const std::string& filename);
+    virtual void useTexture(Texture* texture, int slot);
+    virtual void destroyTexture(Texture*& texture);
 };
 
 }

source/hyporo/gpu/shader.cpp

@@ -7,17 +7,34 @@ namespace hpr::gpu
 
 Shader::Shader() :
     Context {DeviceAPI::Unknown},
-    p_filename {},
-    p_label {}
+    p_filename {"\0"},
+    p_label {"\0"},
+    p_type {ShaderType::Vertex}
 {}
 
 Shader::Shader(DeviceAPI api) :
     Context {api},
-    p_filename {},
-    p_label {}
+    p_filename {"\0"},
+    p_label {"\0"},
+    p_type {ShaderType::Vertex}
 {}
 
 Shader::~Shader() 
 {}
 
+const std::string Shader::filename() const
+{
+    return p_filename;
+}
+
+const std::string Shader::label() const
+{
+    return p_label;
+}
+
+const Shader::ShaderType Shader::type() const
+{
+    return p_type;
+}
+
 }

source/hyporo/gpu/shader.hpp

@@ -10,10 +10,7 @@ namespace hpr::gpu
 
 class Shader : public Context
 {
-protected:
-
-    std::string p_filename;
-    std::string p_label;
+    friend class Device;
 
 public:
 
@@ -25,6 +22,14 @@ public:
         ShaderTypeCount
     };
 
+protected:
+
+    std::string p_filename;
+    std::string p_label;
+    ShaderType p_type;
+
+public:
+
     // Constructors
 
     Shader();
@@ -39,7 +44,7 @@ public:
 
     const std::string label() const;
 
-    const ShaderType shaderType() const;
+    const ShaderType type() const;
 };
 
 } // end namespace hpr::gpu

source/hyporo/gpu/shader_program.hpp

@@ -11,6 +11,7 @@ namespace hpr::gpu
 
 class ShaderProgram : public Context
 {
+    friend class Device;
 
 protected:
 

source/hyporo/gpu/texture.cpp

@@ -23,4 +23,19 @@ Texture::Texture(DeviceAPI api) :
 Texture::~Texture()
 {}
 
+std::string Texture::filename() const
+{
+    return p_filename;
+}
+
+int Texture::width() const
+{
+    return p_width;
+}
+
+int Texture::height() const
+{
+    return p_height;
+}
+
 }

source/hyporo/gpu/texture.hpp

@@ -28,11 +28,11 @@ public:
 
     // Member functions
 
-    const std::string filename() const();
+    std::string filename() const;
 
-    const int width() const;
+    int width() const;
 
-    const int height() const;
+    int height() const;
 };
 
 } // end namespace hpr::gpu

source/hyporo/hyplib/CMakeLists.txt

@@ -15,9 +15,12 @@ add_library(hyporo-hyplib STATIC
     vector/vector.hpp
     matrix/MatrixSpace.hpp
     matrix/matrix.hpp
+    io/file.hpp
+    io/io.hpp
 
     # Source files
     scalar/scalar.cpp
+    io/file.cpp
 )
 
 if(WITH_GTESTS)

source/hyporo/hyplib/io/file.cpp

@@ -0,0 +1,70 @@
+
+#include "file.hpp"
+
+
+namespace hpr
+{
+
+File::File() :
+    p_name {"\0"},
+    p_mode {File::Read}
+{}
+
+File::File(const std::string &filename) :
+    p_name {filename},
+    p_mode {File::Read}
+{}
+
+File::File(const char *filename) :
+    p_name {filename},
+    p_mode {File::Read}
+{}
+
+File::~File()
+{
+    if (p_file.is_open())
+        p_file.close();
+}
+
+void File::open(const std::string &filename, unsigned int filemode)
+{
+    std::ios::openmode mode = filemode & File::Read ? std::ios::in : std::ios::out;
+
+    if (filemode & File::Binary)
+        mode |= std::ios::binary;
+
+    p_file.open(filename, mode);
+
+    if (!p_file.is_open())
+        throw std::ios::failure("Could not open file");
+}
+
+void File::close()
+{
+    if (p_file.is_open())
+        p_file.close();
+}
+
+size_t File::length()
+{
+    std::streampos size = 0;
+    std::streampos oldPos = p_file.tellg();
+
+    p_file.seekg(0, std::ios::beg);
+    size = p_file.tellg();
+    p_file.seekg(0, std::ios::end);
+    size = p_file.tellg() - size;
+    p_file.seekg(oldPos, std::ios::beg);
+
+    return (size_t)size;
+}
+
+std::stringstream File::read()
+{
+    std::stringstream content;
+    content << p_file.rdbuf();
+
+    return content;
+}
+
+}

source/hyporo/hyplib/io/file.hpp

@@ -0,0 +1,53 @@
+#pragma once
+
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+
+namespace hpr
+{
+
+class File
+{
+
+public:
+
+    enum FileMode
+    {
+        Write = std::ios::out,
+        Read = std::ios::in,
+        Binary = std::ios::binary,
+        Append = std::ios::app
+    };
+
+protected:
+
+    std::string p_name;
+    unsigned int p_mode;
+    std::fstream p_file;
+
+public:
+
+    // Constructors
+
+    File();
+
+    File(const std::string& filename);
+
+    File(const char* filename);
+
+    ~File();
+
+    // Member functions
+
+    void open(const std::string& filename, unsigned int filemode = File::Read);
+
+    void close();
+
+    size_t length();
+
+    std::stringstream read();
+};
+
+}

source/hyporo/hyplib/io/io.hpp

@@ -0,0 +1,4 @@
+#pragma once
+
+#include "file.hpp"
+

source/hyporo/hyplib/vector/vector.hpp

@@ -1,3 +1,5 @@
+#pragma once
+
 #include "scalar.hpp"
 #include "VectorSpace.hpp"