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-rw-r--r--src/GalOgl.cpp1344
1 files changed, 1344 insertions, 0 deletions
diff --git a/src/GalOgl.cpp b/src/GalOgl.cpp
new file mode 100644
index 0000000..052c68a
--- /dev/null
+++ b/src/GalOgl.cpp
@@ -0,0 +1,1344 @@
+#include "Gal.hpp"
+
+#include <easylogging++.h>
+#include <GL/glew.h>
+#include <glm/gtc/type_ptr.hpp>
+#include <optick.h>
+
+#include "Utility.hpp"
+
+enum class GlResourceType {
+ Vbo,
+ Vao,
+ Texture,
+ Fbo,
+ Program,
+ None,
+};
+
+class GlResource {
+ GlResourceType type = GlResourceType::None;
+ GLuint res = 0;
+public:
+ GlResource() = default;
+
+ GlResource(GLuint resource, GlResourceType resType) noexcept : res(resource), type(resType) {}
+
+ GlResource(const GlResource&) = delete;
+
+ GlResource(GlResource&& rhs) noexcept {
+ std::swap(this->res, rhs.res);
+ std::swap(this->type, rhs.type);
+ }
+
+ GlResource& operator=(const GlResource&) = delete;
+
+ GlResource& operator=(GlResource&& rhs) noexcept {
+ std::swap(this->res, rhs.res);
+ std::swap(this->type, rhs.type);
+ return *this;
+ }
+
+ ~GlResource() {
+ switch (type) {
+ case GlResourceType::Vbo:
+ glDeleteBuffers(1, &res);
+ break;
+ case GlResourceType::Vao:
+ glDeleteVertexArrays(1, &res);
+ break;
+ case GlResourceType::Texture:
+ glDeleteTextures(1, &res);
+ break;
+ case GlResourceType::Fbo:
+ glDeleteFramebuffers(1, &res);
+ break;
+ case GlResourceType::Program:
+ glDeleteProgram(res);
+ break;
+ case GlResourceType::None:
+ default:
+ break;
+ }
+ }
+
+ operator GLuint() const noexcept {
+ return res;
+ }
+
+ GLuint Get() const noexcept {
+ return res;
+ }
+};
+
+
+using namespace Gal;
+
+class ImplOgl;
+class ShaderOgl;
+class FramebufferOgl;
+
+class OglState {
+ GLuint activeFbo = 0;
+ GLuint activeVao = 0;
+ GLuint activeVbo = 0;
+ GLuint activeEbo = 0;
+ GLuint activeProgram = 0;
+ GLuint activeTexture[16] = { 0 };
+ GLuint activeTextureUnit = 0;
+ GLint vpX = 0, vpY = 0;
+ GLsizei vpW = 0, vpH = 0;
+
+public:
+
+ void BindFbo(GLuint fbo) {
+ if (fbo != activeFbo) {
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+ activeFbo = fbo;
+ }
+ glCheckError();
+ }
+
+ void BindVao(GLuint vao) {
+ if (vao != activeVao) {
+ glBindVertexArray(vao);
+ activeVao = vao;
+ }
+ glCheckError();
+ }
+
+ void BindVbo(GLuint vbo) {
+ if (vbo != activeVbo) {
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+ activeVbo = vbo;
+ }
+ glCheckError();
+ }
+
+ void BindEbo(GLuint ebo) {
+ if (ebo != activeEbo) {
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
+ activeEbo = ebo;
+ }
+ glCheckError();
+ }
+
+ void SetTextureUnit(size_t textureUnit) {
+ if (textureUnit != activeTextureUnit) {
+ glActiveTexture(GL_TEXTURE0 + textureUnit);
+ activeTextureUnit = textureUnit;
+ }
+ glCheckError();
+ }
+
+ void BindTexture(GLenum type, GLuint texture, size_t textureUnit = 17) {
+ if (textureUnit >= 16)
+ textureUnit = activeTextureUnit;
+ if (activeTexture[textureUnit] != texture) {
+ SetTextureUnit(textureUnit);
+ glBindTexture(type, texture);
+ }
+ glCheckError();
+ }
+
+ void UseProgram(GLuint program) {
+ if (program != activeProgram) {
+ glUseProgram(program);
+ activeProgram = program;
+ }
+ glCheckError();
+ }
+
+ void SetViewport(GLint x, GLint y, GLsizei w, GLsizei h) {
+ if (x != vpX || y != vpY || w != vpW || h != vpH) {
+ glViewport(x, y, w, h);
+ vpX = x;
+ vpY = y;
+ vpW = w;
+ vpH = h;
+ }
+ glCheckError();
+ }
+
+} oglState;
+
+std::unique_ptr<ImplOgl> impl;
+std::shared_ptr<FramebufferOgl> fbDefault;
+
+size_t GalTypeGetComponents(Gal::Type type) {
+ switch (type) {
+ case Type::Float:
+ case Type::Double:
+ case Type::Uint8:
+ case Type::Uint16:
+ case Type::Uint32:
+ case Type::Int8:
+ case Type::Int16:
+ case Type::Int32:
+ return 1;
+ case Type::Vec2:
+ case Type::Vec2u8:
+ case Type::Vec2u16:
+ case Type::Vec2u32:
+ case Type::Vec2i8:
+ case Type::Vec2i16:
+ case Type::Vec2i32:
+ return 2;
+ case Type::Vec3:
+ case Type::Vec3u8:
+ case Type::Vec3u16:
+ case Type::Vec3u32:
+ case Type::Vec3i8:
+ case Type::Vec3i16:
+ case Type::Vec3i32:
+ return 3;
+ case Type::Vec4:
+ case Type::Vec4u8:
+ case Type::Vec4u16:
+ case Type::Vec4u32:
+ case Type::Vec4i8:
+ case Type::Vec4i16:
+ case Type::Vec4i32:
+ case Type::Mat2:
+ return 4;
+ case Type::Mat3:
+ return 9;
+ case Type::Mat4:
+ return 16;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+size_t GalTypeGetComponentSize(Gal::Type type) {
+ switch (type) {
+ case Type::Uint8:
+ case Type::Int8:
+ case Type::Vec2u8:
+ case Type::Vec2i8:
+ case Type::Vec3u8:
+ case Type::Vec3i8:
+ case Type::Vec4u8:
+ case Type::Vec4i8:
+ return 1;
+ case Type::Uint16:
+ case Type::Int16:
+ case Type::Vec2u16:
+ case Type::Vec2i16:
+ case Type::Vec3u16:
+ case Type::Vec3i16:
+ case Type::Vec4u16:
+ case Type::Vec4i16:
+ return 2;
+ case Type::Float:
+ case Type::Uint32:
+ case Type::Int32:
+ case Type::Vec2:
+ case Type::Vec2u32:
+ case Type::Vec2i32:
+ case Type::Vec3:
+ case Type::Vec3u32:
+ case Type::Vec3i32:
+ case Type::Vec4:
+ case Type::Vec4u32:
+ case Type::Vec4i32:
+ case Type::Mat2:
+ case Type::Mat3:
+ case Type::Mat4:
+ return 4;
+ case Type::Double:
+ return 8;
+ default:
+ return 0;
+ }
+}
+
+size_t GalTypeGetSize(Gal::Type type) {
+ return GalTypeGetComponents(type) * GalTypeGetComponentSize(type);
+}
+
+GLenum GalTypeGetComponentGlType(Gal::Type type) {
+ switch (type) {
+ case Type::Float:
+ case Type::Vec2:
+ case Type::Vec3:
+ case Type::Vec4:
+ case Type::Mat2:
+ case Type::Mat3:
+ case Type::Mat4:
+ return GL_FLOAT;
+ case Type::Double:
+ return GL_DOUBLE;
+ case Type::Uint8:
+ case Type::Vec2u8:
+ case Type::Vec3u8:
+ case Type::Vec4u8:
+ return GL_UNSIGNED_BYTE;
+ case Type::Uint16:
+ case Type::Vec2u16:
+ case Type::Vec3u16:
+ case Type::Vec4u16:
+ return GL_UNSIGNED_SHORT;
+ case Type::Uint32:
+ case Type::Vec2u32:
+ case Type::Vec3u32:
+ case Type::Vec4u32:
+ return GL_UNSIGNED_INT;
+ case Type::Int8:
+ case Type::Vec2i8:
+ case Type::Vec3i8:
+ case Type::Vec4i8:
+ return GL_BYTE;
+ case Type::Int16:
+ case Type::Vec2i16:
+ case Type::Vec3i16:
+ case Type::Vec4i16:
+ return GL_SHORT;
+ case Type::Int32:
+ case Type::Vec2i32:
+ case Type::Vec3i32:
+ case Type::Vec4i32:
+ return GL_INT;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+size_t GalFormatGetSize(Format format) {
+ switch (format) {
+ case Format::R8G8B8:
+ return 3;
+ case Format::R8G8B8A8:
+ return 4;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+GLenum GalFormatGetGlInternalFormat(Format format) {
+ switch (format) {
+ case Format::D24S8:
+ return GL_DEPTH24_STENCIL8;
+ case Format::R8G8B8:
+ return GL_RGB8;
+ case Format::R8G8B8A8:
+ return GL_RGBA8;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+GLenum GalFormatGetGlFormat(Format format) {
+ switch (format) {
+ case Format::D24S8:
+ return GL_DEPTH_STENCIL;
+ case Format::R8G8B8:
+ return GL_RGB;
+ case Format::R8G8B8A8:
+ return GL_RGBA;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+GLenum GalFormatGetGlType(Format format) {
+ switch (format) {
+ case Format::D24S8:
+ return GL_UNSIGNED_INT_24_8;
+ case Format::R8G8B8:
+ return GL_UNSIGNED_BYTE;
+ case Format::R8G8B8A8:
+ return GL_UNSIGNED_BYTE;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+GLenum GalFilteringGetGlType(Filtering filtering) {
+ switch (filtering) {
+ case Filtering::Nearest:
+ return GL_NEAREST;
+ case Filtering::Bilinear:
+ return GL_LINEAR;
+ case Filtering::Trilinear:
+ return GL_LINEAR_MIPMAP_LINEAR;
+ case Filtering::Anisotropy:
+ return GL_LINEAR;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+GLenum GalWrappingGetGlType(Wrapping wrapping) {
+ switch (wrapping) {
+ case Wrapping::Repeat:
+ return GL_REPEAT;
+ case Wrapping::Clamp:
+ return GL_CLAMP_TO_EDGE;
+ case Wrapping::Mirror:
+ return GL_MIRRORED_REPEAT;
+ default:
+ return 0;
+ }
+ return 0;
+}
+
+GLenum glCheckError_(const char* file, int line) {
+ OPTICK_EVENT();
+ GLenum errorCode;
+ while ((errorCode = glGetError()) != GL_NO_ERROR) {
+ std::string error;
+ switch (errorCode) {
+ case GL_INVALID_ENUM:
+ error = "INVALID_ENUM";
+ break;
+ case GL_INVALID_VALUE:
+ error = "INVALID_VALUE";
+ break;
+ case GL_INVALID_OPERATION:
+ error = "INVALID_OPERATION";
+ break;
+ case GL_STACK_OVERFLOW:
+ error = "STACK_OVERFLOW";
+ break;
+ case GL_STACK_UNDERFLOW:
+ error = "STACK_UNDERFLOW";
+ break;
+ case GL_OUT_OF_MEMORY:
+ error = "OUT_OF_MEMORY";
+ break;
+ case GL_INVALID_FRAMEBUFFER_OPERATION:
+ error = "INVALID_FRAMEBUFFER_OPERATION";
+ break;
+ }
+ LOG(ERROR) << "OpenGL error: " << error << " at " << file << ":" << line;
+ }
+ return errorCode;
+}
+
+#ifndef NDEBUG
+#define glCheckError() glCheckError_(__FILE__, __LINE__)
+#else
+#define glCheckError()
+#endif // !NDEBUG
+
+
+void GLAPIENTRY glDebugOutput(GLenum source,
+ GLenum type,
+ unsigned int id,
+ GLenum severity,
+ GLsizei length,
+ const char* message,
+ const void* userParam)
+{
+ // ignore non-significant error/warning codes
+ if (id == 131169 || id == 131185 || id == 131218 || id == 131204) return;
+
+ el::Level level = el::Level::Error;
+ std::string sourceText;
+ std::string typeText;
+ std::string severityText;
+
+ switch (severity)
+ {
+ case GL_DEBUG_SEVERITY_HIGH:
+ severityText = "HIGH";
+ break;
+ case GL_DEBUG_SEVERITY_MEDIUM:
+ severityText = "MEDIUM";
+ break;
+ case GL_DEBUG_SEVERITY_LOW:
+ severityText = "LOW";
+ level = el::Level::Warning;
+ break;
+ case GL_DEBUG_SEVERITY_NOTIFICATION:
+ severityText = "NOTIFY";
+ level = el::Level::Info;
+ break;
+ }
+
+ switch (source)
+ {
+ case GL_DEBUG_SOURCE_API:
+ sourceText = "API";
+ break;
+ case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
+ sourceText = "Window System";
+ break;
+ case GL_DEBUG_SOURCE_SHADER_COMPILER:
+ sourceText = "Shader Compiler";
+ break;
+ case GL_DEBUG_SOURCE_THIRD_PARTY:
+ sourceText = "Third Party";
+ break;
+ case GL_DEBUG_SOURCE_APPLICATION:
+ sourceText = "Application";
+ break;
+ case GL_DEBUG_SOURCE_OTHER:
+ sourceText = "Other";
+ break;
+ default:
+ sourceText = std::to_string(source);
+ break;
+ }
+
+ switch (type)
+ {
+ case GL_DEBUG_TYPE_ERROR:
+ typeText = "Error";
+ break;
+ case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
+ typeText = "Deprecated Behaviour";
+ break;
+ case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
+ typeText = "Undefined Behaviour";
+ break;
+ case GL_DEBUG_TYPE_PORTABILITY:
+ typeText = "Portability";
+ break;
+ case GL_DEBUG_TYPE_PERFORMANCE:
+ typeText = "Performance";
+ break;
+ case GL_DEBUG_TYPE_MARKER:
+ typeText = "Marker";
+ break;
+ case GL_DEBUG_TYPE_PUSH_GROUP:
+ typeText = "Push Group";
+ break;
+ case GL_DEBUG_TYPE_POP_GROUP:
+ typeText = "Pop Group";
+ break;
+ case GL_DEBUG_TYPE_OTHER:
+ typeText = "Other";
+ break;
+ default:
+ typeText = std::to_string(type);
+ break;
+ }
+
+ std::string log = "OpenGL debug (" + std::to_string(id) + ") [" + severityText + "][" + sourceText + "][" + typeText + "]: \n" + message;
+
+ switch (level) {
+ case el::Level::Error:
+ LOG(ERROR) << log;
+ break;
+ case el::Level::Warning:
+ LOG(WARNING) << log;
+ break;
+ case el::Level::Info:
+ LOG(INFO) << log;
+ break;
+ default:
+ LOG(ERROR) << log;
+ break;
+ }
+}
+
+
+struct ShaderOgl : public Shader {
+
+ bool isVertex = true;
+ std::string code;
+
+};
+
+struct BufferBindingOgl : public BufferBinding {
+
+ BufferBindingOgl(size_t id) : bufferId(id) {}
+
+ const size_t bufferId;
+
+ static constexpr size_t indexValue = (std::numeric_limits<size_t>::max)(); //parenthess for windows' max macro
+
+};
+
+struct BufferOgl : public Buffer {
+
+ GlResource vbo;
+
+ virtual void SetData(std::vector<std::byte>&& data) override {
+ oglState.BindVbo(vbo);
+ glBufferData(GL_ARRAY_BUFFER, data.size(), data.data(), GL_STATIC_DRAW);
+ oglState.BindVbo(0);
+ glCheckError();
+ }
+
+};
+
+struct TextureConfigOgl : public TextureConfig {
+
+ Format format;
+ size_t width = 1, height = 1, depth = 1;
+ bool interpolateLayers = false;
+ GLenum type;
+
+ Filtering min = Filtering::Nearest, max = Filtering::Nearest;
+ Wrapping wrap = Wrapping::Clamp;
+
+ virtual void SetMinFilter(Filtering filter) override {
+ min = filter;
+ }
+
+ virtual void SetMaxFilter(Filtering filter) override {
+ max = filter;
+ }
+
+ virtual void SetWrapping(Wrapping wrapping) override {
+ wrap = wrapping;
+ }
+
+};
+
+struct TextureOgl : public Texture {
+
+ GLenum type;
+ GlResource texture;
+ Format format;
+ size_t width, height, depth;
+
+ virtual void SetData(std::vector<std::byte>&& data, size_t mipLevel = 0) override {
+ size_t expectedSize = width * height * depth * GalFormatGetSize(format);
+ if (data.size() != expectedSize && !data.empty())
+ throw std::logic_error("Size of data is not valid for this texture");
+
+ oglState.BindTexture(type, texture);
+
+ switch (type) {
+ case GL_TEXTURE_1D:
+ case GL_PROXY_TEXTURE_1D:
+ break;
+ case GL_TEXTURE_2D:
+ case GL_PROXY_TEXTURE_2D:
+ case GL_TEXTURE_1D_ARRAY:
+ case GL_PROXY_TEXTURE_1D_ARRAY:
+ case GL_TEXTURE_RECTANGLE:
+ case GL_PROXY_TEXTURE_RECTANGLE:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+ case GL_PROXY_TEXTURE_CUBE_MAP:
+ glTexImage2D(type, mipLevel, GalFormatGetGlInternalFormat(format), width, height, 0, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.empty() ? nullptr : data.data());
+ break;
+ case GL_TEXTURE_3D:
+ case GL_PROXY_TEXTURE_3D:
+ case GL_TEXTURE_2D_ARRAY:
+ case GL_PROXY_TEXTURE_2D_ARRAY:
+ glTexImage3D(type, mipLevel, GalFormatGetGlInternalFormat(format), width, height, depth, 0, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.empty() ? nullptr : data.data());
+ break;
+ default:
+ throw std::runtime_error("Unknown texture type");
+ }
+
+ glCheckError();
+ oglState.BindTexture(type, 0);
+ }
+
+ virtual void SetSubData(size_t x, size_t y, size_t z, size_t width, size_t height, size_t depth, std::vector<std::byte>&& data, size_t mipLevel = 0) override {
+ size_t expectedSize = width * height * depth * GalFormatGetSize(format);
+ if (data.size() != expectedSize)
+ throw std::logic_error("Size of data is not valid for this texture");
+
+ oglState.BindTexture(type, texture);
+
+ switch (type) {
+ case GL_TEXTURE_1D:
+ case GL_PROXY_TEXTURE_1D:
+ break;
+ case GL_TEXTURE_2D:
+ case GL_PROXY_TEXTURE_2D:
+ case GL_TEXTURE_1D_ARRAY:
+ case GL_PROXY_TEXTURE_1D_ARRAY:
+ case GL_TEXTURE_RECTANGLE:
+ case GL_PROXY_TEXTURE_RECTANGLE:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+ case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+ case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+ case GL_PROXY_TEXTURE_CUBE_MAP:
+ glTexSubImage2D(type, mipLevel, x, y, width, height, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.data());
+ break;
+ case GL_TEXTURE_3D:
+ case GL_PROXY_TEXTURE_3D:
+ case GL_TEXTURE_2D_ARRAY:
+ case GL_PROXY_TEXTURE_2D_ARRAY:
+ glTexSubImage3D(type, mipLevel, x, y, z, width, height, depth, GalFormatGetGlFormat(format), GalFormatGetGlType(format), data.data());
+ break;
+ default:
+ throw std::runtime_error("Unknown texture type");
+ }
+
+ glCheckError();
+ oglState.BindTexture(type, 0);
+ }
+
+};
+
+struct FramebufferOgl : public Framebuffer {
+
+ size_t vpX = 0, vpY = 0, vpW = 1, vpH = 1;
+ std::shared_ptr<TextureOgl> depthStencil;
+ std::vector<std::shared_ptr<TextureOgl>> colors;
+
+ GlResource fbo;
+
+ virtual void Clear() override {
+ oglState.BindFbo(fbo ? fbo : 0);
+ GLbitfield clearBits = 0;
+ clearBits |= GL_COLOR_BUFFER_BIT;
+ clearBits |= GL_DEPTH_BUFFER_BIT;
+ if (depthStencil)
+ clearBits |= GL_STENCIL_BUFFER_BIT;
+ glClear(clearBits);
+ glCheckError();
+ }
+
+ virtual void SetViewport(size_t x, size_t y, size_t w, size_t h) override {
+ vpX = x;
+ vpY = y;
+ vpW = w;
+ vpH = h;
+ }
+
+};
+
+struct FramebufferConfigOgl : public FramebufferConfig {
+
+ std::shared_ptr<TextureOgl> depthStencil;
+ std::map<size_t, std::shared_ptr<TextureOgl>> colors;
+
+ virtual void SetDepthStencil(std::shared_ptr<Texture> texture) override {
+ auto tex = std::static_pointer_cast<TextureOgl, Texture>(texture);
+ depthStencil = tex;
+ }
+
+ virtual void SetTexture(size_t location, std::shared_ptr<Texture> texture) override {
+ auto tex = std::static_pointer_cast<TextureOgl, Texture>(texture);
+ colors.emplace(location, tex);
+ }
+};
+
+struct PipelineConfigOgl : public PipelineConfig {
+
+ std::shared_ptr<ShaderOgl> vertexShader, pixelShader;
+ std::map<std::string, std::shared_ptr<TextureOgl>> textures;
+ std::map<std::string, Type> shaderParameters;
+ std::shared_ptr<FramebufferOgl> targetFb;
+ std::vector<std::vector<VertexAttribute>> vertexBuffers;
+ Primitive vertexPrimitive = Primitive::Triangle;
+
+ virtual void SetVertexShader(std::shared_ptr<Shader> shader) override {
+ vertexShader = std::static_pointer_cast<ShaderOgl,Shader>(shader);
+ }
+
+ virtual void SetPixelShader(std::shared_ptr<Shader> shader) override {
+ pixelShader = std::static_pointer_cast<ShaderOgl, Shader>(shader);
+ }
+
+ virtual void AddShaderParameter(std::string_view name, Type type) override {
+ shaderParameters.emplace(std::string(name), type);
+ }
+
+ virtual void AddStaticTexture(std::string_view name, std::shared_ptr<Texture> texture) override {
+ auto tex = std::static_pointer_cast<TextureOgl, Texture>(texture);
+ textures.emplace(std::string(name), tex);
+ }
+
+ virtual void SetTarget(std::shared_ptr<Framebuffer> target) override {
+ auto fb = std::static_pointer_cast<FramebufferOgl, Framebuffer>(target);
+ targetFb = fb;
+ }
+
+ virtual void SetPrimitive(Primitive primitive) override {
+ vertexPrimitive = primitive;
+ }
+
+ virtual std::shared_ptr<BufferBinding> BindVertexBuffer(std::vector<VertexAttribute> &&bufferLayout) override {
+ auto binding = std::make_shared<BufferBindingOgl>(vertexBuffers.size());
+ vertexBuffers.push_back(bufferLayout);
+ return std::static_pointer_cast<BufferBinding, BufferBindingOgl>(binding);
+ }
+
+ virtual std::shared_ptr<BufferBinding> BindIndexBuffer() override {
+ auto binding = std::make_shared<BufferBindingOgl>(BufferBindingOgl::indexValue);
+ return std::static_pointer_cast<BufferBinding, BufferBindingOgl>(binding);
+ }
+
+};
+
+struct PipelineInstanceOgl : public PipelineInstance {
+
+ GlResource vao;
+ bool useIndex = false;
+ Primitive primitive;
+ size_t instances = 0;
+
+ virtual void Activate() override {
+ oglState.BindVao(vao);
+ }
+
+ virtual void Render(size_t offset = 0, size_t count = -1) override {
+ GLenum vertexMode;
+ switch (primitive) {
+ case Primitive::Line:
+ vertexMode = GL_LINES;
+ break;
+ case Primitive::Triangle:
+ vertexMode = GL_TRIANGLES;
+ break;
+ case Primitive::TriangleFan:
+ vertexMode = GL_TRIANGLE_FAN;
+ break;
+ case Primitive::TriangleStrip:
+ vertexMode = GL_TRIANGLE_STRIP;
+ break;
+ default:
+ vertexMode = GL_TRIANGLES;
+ }
+
+ if (useIndex) {
+ if (instances) {
+ glDrawElementsInstanced(vertexMode, instances, GL_UNSIGNED_INT, nullptr, instances);
+ }
+ else {
+ glDrawElements(vertexMode, count, GL_UNSIGNED_INT, nullptr);
+ }
+ }
+ else {
+ if (instances) {
+ glDrawArraysInstanced(vertexMode, offset, instances, count);
+ }
+ else {
+ glDrawArrays(vertexMode, offset, count);
+ }
+ }
+ }
+
+ virtual void SetInstancesCount(size_t count) override {
+ instances = count;
+ }
+
+};
+
+struct PipelineOgl : public Pipeline {
+
+ std::map<std::string, size_t> shaderParameters;
+ std::vector<std::shared_ptr<TextureOgl>> staticTextures;
+ GlResource program;
+ struct VertexBindingCommand {
+ size_t bufferId;
+ size_t location;
+ GLenum type;
+ size_t count;
+ size_t stride;
+ size_t offset;
+ size_t instances;
+ };
+ std::vector<VertexBindingCommand> vertexBindCmds;
+ Primitive primitive;
+ std::shared_ptr<FramebufferOgl> target;
+
+ virtual void Activate() override {
+ oglState.UseProgram(program);
+ oglState.BindFbo(target->fbo);
+ oglState.SetViewport(target->vpX, target->vpY, target->vpW, target->vpH);
+
+ for (size_t i = 0; i < staticTextures.size(); i++) {
+ oglState.BindTexture(staticTextures[i]->type, staticTextures[i]->texture, i);
+ }
+ }
+
+ virtual void SetDynamicTexture(std::string_view name, std::shared_ptr<Texture> texture) override {
+ Activate();
+ auto tex = std::static_pointer_cast<TextureOgl>(texture);
+ oglState.BindTexture(tex->type, tex->texture, staticTextures.size());
+ SetShaderParameter(name, static_cast<int>(staticTextures.size()));
+ glCheckError();
+ }
+
+ virtual std::shared_ptr<PipelineInstance> CreateInstance(std::vector<std::pair<std::shared_ptr<BufferBinding>, std::shared_ptr<Buffer>>>&& buffers) override {
+ auto instance = std::make_shared<PipelineInstanceOgl>();
+
+ instance->primitive = primitive;
+
+ size_t indexBuffer = BufferBindingOgl::indexValue;
+ std::map<size_t, size_t> bufferBindingId;
+
+ for (auto&& [binding, buffer] : buffers) {
+ auto bind = std::static_pointer_cast<BufferBindingOgl, BufferBinding>(binding);
+ auto buff = std::static_pointer_cast<BufferOgl, Buffer>(buffer);
+
+ if (bind->bufferId == BufferBindingOgl::indexValue)
+ indexBuffer = buff->vbo;
+ else
+ bufferBindingId.insert({ bind->bufferId,buff->vbo });
+ }
+
+ GLuint newVao;
+ glGenVertexArrays(1, &newVao);
+ instance->vao = GlResource(newVao, GlResourceType::Vao);
+ oglState.BindVao(instance->vao);
+
+ for (const auto& cmd : vertexBindCmds) {
+ oglState.BindVbo(bufferBindingId.find(cmd.bufferId)->second);
+ switch (cmd.type) {
+ case GL_FLOAT:
+ case GL_DOUBLE:
+ glVertexAttribPointer(cmd.location, cmd.count, cmd.type, GL_FALSE, cmd.offset, reinterpret_cast<void*>(cmd.stride));
+ break;
+ case GL_UNSIGNED_BYTE:
+ case GL_BYTE:
+ case GL_UNSIGNED_SHORT:
+ case GL_SHORT:
+ case GL_UNSIGNED_INT:
+ case GL_INT:
+ glVertexAttribIPointer(cmd.location, cmd.count, cmd.type, cmd.offset, reinterpret_cast<void*>(cmd.stride));
+ break;
+ }
+
+ glEnableVertexAttribArray(cmd.location);
+ if (cmd.instances) {
+ glVertexAttribDivisor(cmd.location, cmd.instances);
+ }
+ }
+
+ if (indexBuffer != BufferBindingOgl::indexValue) {
+ oglState.BindEbo(indexBuffer);
+ instance->useIndex = true;
+ }
+
+ glCheckError();
+
+ oglState.BindVao(0);
+ oglState.BindVbo(0);
+ oglState.BindEbo(0);
+
+ return instance;
+ }
+
+ virtual void SetShaderParameter(std::string_view name, float value) override {
+ Activate();
+ glUniform1f(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, double value) override {
+ Activate();
+ glUniform1d(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, int8_t value) override {
+ Activate();
+ glUniform1i(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, int16_t value) override {
+ Activate();
+ glUniform1i(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, int32_t value) override {
+ Activate();
+ glUniform1i(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, uint8_t value) override {
+ Activate();
+ glUniform1ui(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, uint16_t value) override {
+ Activate();
+ glUniform1ui(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, uint32_t value) override {
+ Activate();
+ glUniform1ui(shaderParameters.at(std::string(name)), value);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, glm::vec2 value) override {
+ Activate();
+ glUniform2f(shaderParameters.at(std::string(name)), value.x, value.y);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, glm::uvec2 value) override {
+ Activate();
+ glUniform2ui(shaderParameters.at(std::string(name)), value.x, value.y);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, glm::vec3 value) override {
+ Activate();
+ glUniform3f(shaderParameters.at(std::string(name)), value.x, value.y, value.z);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, glm::vec4 value) override {
+ Activate();
+ glUniform4f(shaderParameters.at(std::string(name)), value.x, value.y, value.z, value.w);
+ }
+
+ virtual void SetShaderParameter(std::string_view name, glm::mat4 value) override {
+ Activate();
+ glUniformMatrix4fv(shaderParameters.at(std::string(name)), 1, GL_FALSE, glm::value_ptr(value));
+ }
+
+};
+
+struct ImplOgl : public Impl {
+
+ virtual void Init() override {
+ LOG(INFO) << "Initalizing Gal:OpenGL...";
+ LOG(INFO) << "Initializing GLEW";
+ glewExperimental = GL_TRUE;
+ GLenum glewStatus = glewInit();
+ if (glewStatus != GLEW_OK) {
+ LOG(FATAL) << "Failed to initialize GLEW: " << glewGetErrorString(glewStatus);
+ }
+
+ glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+ glEnable(GL_DEPTH_TEST);
+ glDepthFunc(GL_LEQUAL);
+
+ glEnable(GL_CULL_FACE);
+ glCullFace(GL_BACK);
+ glFrontFace(GL_CCW);
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glCheckError();
+ if (glActiveTexture == nullptr) {
+ throw std::runtime_error("GLEW initialization failed with unknown reason");
+ }
+
+ GLint flags;
+ glGetIntegerv(GL_CONTEXT_FLAGS, &flags);
+ if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
+ {
+ glEnable(GL_DEBUG_OUTPUT);
+ glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
+ glDebugMessageCallback(glDebugOutput, nullptr);
+ glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, nullptr, GL_TRUE);
+ }
+ glCheckError();
+ }
+
+ virtual void DeInit() override {
+ LOG(INFO) << "Destroying Gal:OpenGL...";
+ glCheckError();
+ }
+
+ virtual void Cleanup() override {
+
+ }
+
+ virtual void SetScissor(size_t x = 0, size_t y = 0, size_t width = 0, size_t height = 0) override {
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(x, y, width, height);
+ glCheckError();
+ }
+
+ virtual void SetScissor(bool enabled) override {
+ if (enabled)
+ glEnable(GL_SCISSOR_TEST);
+ else
+ glDisable(GL_SCISSOR_TEST);
+ glCheckError();
+ }
+
+
+ virtual std::shared_ptr<Buffer> CreateBuffer() override {
+ auto buff = std::make_shared<BufferOgl>();
+ GLuint newVbo;
+ glGenBuffers(1, &newVbo);
+ buff->vbo = GlResource(newVbo, GlResourceType::Vbo);
+ buff->SetData({});
+ glCheckError();
+ return std::static_pointer_cast<Buffer, BufferOgl>(buff);
+ }
+
+
+ virtual std::shared_ptr<TextureConfig> CreateTexture2DConfig(size_t width, size_t height, Format format) override {
+ auto config = std::make_shared<TextureConfigOgl>();
+
+ config->type = GL_TEXTURE_2D;
+ config->width = width;
+ config->height = height;
+ config->depth = 1;
+ config->format = format;
+
+ return std::static_pointer_cast<TextureConfig, TextureConfigOgl>(config);
+ }
+
+ virtual std::shared_ptr<TextureConfig> CreateTexture3DConfig(size_t width, size_t height, size_t depth, bool interpolateLayers, Format format) override {
+ auto config = std::make_shared<TextureConfigOgl>();
+
+ config->type = interpolateLayers ? GL_TEXTURE_3D : GL_TEXTURE_2D_ARRAY;
+ config->width = width;
+ config->height = height;
+ config->depth = depth;
+ config->interpolateLayers = interpolateLayers;
+ config->format = format;
+
+ return std::static_pointer_cast<TextureConfig, TextureConfigOgl>(config);
+ }
+
+ virtual std::shared_ptr<Texture> BuildTexture(std::shared_ptr<TextureConfig> config) override {
+ auto texConfig = std::static_pointer_cast<TextureConfigOgl, TextureConfig>(config);
+ auto texture = std::make_shared<TextureOgl>();
+
+ texture->type = texConfig->type;
+ texture->format = texConfig->format;
+ texture->width = texConfig->width;
+ texture->height = texConfig->height;
+ texture->depth = texConfig->depth;
+
+ GLuint newTex;
+ glGenTextures(1, &newTex);
+ texture->texture = GlResource(newTex, GlResourceType::Texture);
+
+ oglState.BindTexture(texture->type, texture->texture);
+
+ glTexParameteri(texture->type, GL_TEXTURE_MIN_FILTER, GalFilteringGetGlType(texConfig->min));
+ glTexParameteri(texture->type, GL_TEXTURE_MAG_FILTER, GalFilteringGetGlType(texConfig->max));
+ glTexParameteri(texture->type, GL_TEXTURE_WRAP_S, GalWrappingGetGlType(texConfig->wrap));
+ glTexParameteri(texture->type, GL_TEXTURE_WRAP_T, GalWrappingGetGlType(texConfig->wrap));
+
+ oglState.BindTexture(texture->type, 0);
+ texture->SetData(std::vector<std::byte>(texture->width * texture->height * texture->depth * GalFormatGetSize(texture->format)));
+ glCheckError();
+
+ return std::static_pointer_cast<Texture, TextureOgl>(texture);
+ }
+
+
+ virtual std::shared_ptr<PipelineConfig> CreatePipelineConfig() override {
+ auto pipelineConfig = std::make_shared<PipelineConfigOgl>();
+ return std::static_pointer_cast<PipelineConfig, PipelineConfigOgl>(pipelineConfig);
+ }
+
+ virtual std::shared_ptr<Pipeline> BuildPipeline(std::shared_ptr<PipelineConfig> pipelineConfig) override {
+ auto pipeline = std::make_shared<PipelineOgl>();
+ auto config = std::static_pointer_cast<PipelineConfigOgl, PipelineConfig>(pipelineConfig);
+
+ pipeline->primitive = config->vertexPrimitive;
+
+ pipeline->target = config->targetFb;
+ if (!pipeline->target)
+ pipeline->target = std::static_pointer_cast<FramebufferOgl, Framebuffer>(GetDefaultFramebuffer());
+
+
+ /*
+ * Shader compilation
+ */
+ bool vertexFailed = false, pixelFailed = false, linkFailed = false;
+
+ const GLchar* vertexSourcePtr = config->vertexShader->code.c_str();
+ const GLchar* pixelSourcePtr = config->pixelShader->code.c_str();
+
+ GLuint vertex, pixel;
+ GLint success;
+ GLuint program;
+ GLchar infoLog[512];
+
+ vertex = glCreateShader(GL_VERTEX_SHADER);
+ glShaderSource(vertex, 1, &vertexSourcePtr, NULL);
+ glCompileShader(vertex);
+
+ glGetShaderiv(vertex, GL_COMPILE_STATUS, &success);
+ if (!success) {
+ glGetShaderInfoLog(vertex, 512, NULL, infoLog);
+ LOG(ERROR) << "Vertex shader compilation failed: " << std::endl << infoLog;
+ vertexFailed = true;
+ };
+
+ pixel = glCreateShader(GL_FRAGMENT_SHADER);
+ glShaderSource(pixel, 1, &pixelSourcePtr, NULL);
+ glCompileShader(pixel);
+
+ glGetShaderiv(pixel, GL_COMPILE_STATUS, &success);
+ if (!success) {
+ glGetShaderInfoLog(pixel, 512, NULL, infoLog);
+ LOG(ERROR) << "Fragment shader compilation failed: " << std::endl << infoLog;
+ pixelFailed = true;
+ };
+
+ if (vertexFailed || pixelFailed)
+ throw std::runtime_error("Shaders not compiled");
+
+ program = glCreateProgram();
+ glAttachShader(program, vertex);
+ glAttachShader(program, pixel);
+ glLinkProgram(program);
+ glGetProgramiv(program, GL_LINK_STATUS, &success);
+ if (!success) {
+ glGetProgramInfoLog(program, 512, NULL, infoLog);
+ LOG(ERROR) << "Shader program not linked: " << std::endl << infoLog;
+ linkFailed = true;
+ }
+
+ glDeleteShader(vertex);
+ glDeleteShader(pixel);
+
+ if (linkFailed)
+ throw std::runtime_error("Shader not linked");
+
+ oglState.UseProgram(program);
+ pipeline->program = GlResource(program, GlResourceType::Program);
+ glCheckError();
+
+
+ /*
+ * Shader parameters
+ */
+ for (auto&& [name, type] : config->shaderParameters) {
+ GLint location = glGetUniformLocation(program, name.c_str());
+ if (location < 0) {
+ LOG(ERROR) << "Uniform name \"" << name << "\" not found in shader";
+ }
+ pipeline->shaderParameters.insert({ name,location });
+ }
+ glCheckError();
+
+
+ /*
+ * Static textures
+ */
+ size_t usedTextureBlocks = 0;
+ for (auto&& [name, texture] : config->textures) {
+ GLint location = glGetUniformLocation(program, name.c_str());
+ if (location < 0) {
+ LOG(ERROR) << "Texture uniform name \"" << name << "\" not found in shader";
+ }
+
+ glUniform1i(location, usedTextureBlocks);
+ pipeline->staticTextures.push_back(texture);
+ }
+ glCheckError();
+
+
+ /*
+ * Vertex attributes
+ */
+ size_t bufferId = 0;
+ for (const auto& buffer : config->vertexBuffers) {
+ size_t vertexSize = 0;
+ size_t cmdOffset = pipeline->vertexBindCmds.size();
+ for (const auto& [name, type, count, instances] : buffer) {
+ if (name.empty()) {
+ vertexSize += GalTypeGetSize(type) * count;
+ continue;
+ }
+
+ GLint location = glGetAttribLocation(program, name.c_str());
+ if (location < 0) {
+ LOG(ERROR) << "Vertex attribute name \"" << name << "\" not found in shader";
+ }
+
+ size_t attribSize = GalTypeGetSize(type);
+
+ for (size_t i = 0; i < count; i++) {
+ pipeline->vertexBindCmds.push_back({
+ bufferId,
+ static_cast<size_t>(location + i),
+ GalTypeGetComponentGlType(type),
+ GalTypeGetComponents(type),
+ vertexSize,
+ 0,
+ instances,
+ });
+
+ vertexSize += attribSize;
+ }
+ }
+
+ for (size_t i = cmdOffset; i < pipeline->vertexBindCmds.size(); i++)
+ pipeline->vertexBindCmds[i].offset = vertexSize;
+
+ bufferId++;
+ }
+ glCheckError();
+
+
+ return pipeline;
+ }
+
+ virtual std::shared_ptr<FramebufferConfig> CreateFramebufferConfig() override {
+ auto config = std::make_shared<FramebufferConfigOgl>();
+ return std::static_pointer_cast<FramebufferConfig, FramebufferConfigOgl>(config);
+ }
+
+ virtual std::shared_ptr<Framebuffer> BuildFramebuffer(std::shared_ptr<FramebufferConfig> config) override {
+ auto conf = std::static_pointer_cast<FramebufferConfigOgl, FramebufferConfig>(config);
+ auto fb = std::make_shared<FramebufferOgl>();
+
+ GLuint newFbo;
+ glGenFramebuffers(1, &newFbo);
+ fb->fbo = GlResource(newFbo, GlResourceType::Fbo);
+
+ oglState.BindFbo(fb->fbo);
+
+ if (conf->depthStencil) {
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, conf->depthStencil->type, conf->depthStencil->texture, 0);
+ fb->depthStencil = std::move(conf->depthStencil);
+ }
+
+ for (auto&& [location, texture] : conf->colors) {
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + location, texture->type, texture->texture, 0);
+ fb->colors.emplace_back(std::move(texture));
+ }
+
+ if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+ LOG(ERROR) << "Framebuffer not completed: " << glCheckFramebufferStatus(GL_FRAMEBUFFER);
+ }
+
+ oglState.BindFbo(0);
+ glCheckError();
+
+ return std::static_pointer_cast<Framebuffer, FramebufferOgl>(fb);
+ }
+
+ virtual std::shared_ptr<Framebuffer> GetDefaultFramebuffer() override {
+ if (!fbDefault)
+ fbDefault = std::make_shared<FramebufferOgl>();
+ fbDefault->fbo = GlResource(0, GlResourceType::None);
+ return std::static_pointer_cast<Framebuffer, FramebufferOgl>(fbDefault);
+ }
+
+
+ virtual std::shared_ptr<ShaderParameters> GetGlobalShaderParameters() override {
+ return nullptr;
+ }
+
+ virtual std::shared_ptr<Shader> LoadVertexShader(std::string_view code) override {
+ auto shader = std::make_shared<ShaderOgl>();
+ shader->code = code;
+ shader->isVertex = true;
+ return std::static_pointer_cast<Shader, ShaderOgl>(shader);
+ }
+
+ virtual std::shared_ptr<Shader> LoadPixelShader(std::string_view code) override {
+ auto shader = std::make_shared<ShaderOgl>();
+ shader->code = code;
+ shader->isVertex = false;
+ return std::static_pointer_cast<Shader, ShaderOgl>(shader);
+ }
+
+};
+
+Impl* Gal::GetImplementation()
+{
+ if (!impl)
+ impl = std::make_unique<ImplOgl>();
+
+ return impl.get();
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-29 06:02:18 +0200