Huge graphics overhaul

2026-08-20 08:14:29 -05:00
parent 960689ecb6
commit 3bad580793
19 changed files with 1534 additions and 252 deletions
@@ -0,0 +1,342 @@
+#include "FrameBuffers.hpp"
+
+namespace nb {
+
+using FBOErrorCodes = FrameBufferError::Codes;
+const std::string FrameBufferError::type = "nb::FrameBufferError";
+const ErrorCodeMap FrameBufferError::ErrorMessages = {
+    {FBOErrorCodes::UNDEFINED, "Error"},
+    {FBOErrorCodes::INVALID_VALUE, "Invalid value"}
+};
+
+GLuint FrameBufferBase::declare() {
+    if (!_id) {
+        glGenFramebuffers(1, &_id);
+    }
+    bind();
+    return _id;
+}
+
+void FrameBufferBase::remove() {
+    if (_id) {
+        unbind();
+        glDeleteFramebuffers(1, &_id);
+        _id=0;
+    }
+}
+
+FrameBufferBase::FrameBufferBase(GLenum target) : Target(target) {}
+
+std::shared_ptr<RenderTarget> FrameBufferBase::detach(GLenum attch_) {
+    bind();
+    auto ret = _attachments.at(attch_);
+    _attachments.erase(attch_);
+    glFramebufferTexture(Target, attch_, 0, 0);
+    return ret;
+}
+
+void FrameBufferBase::attach(
+    GLenum attachment_,
+    std::shared_ptr<Texture> texture_,
+    unsigned int level_,
+    unsigned int layer_
+) {
+    declare();
+    if (attachment_ == GL_NONE) {
+        THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+            "Cannot attach object to `GL_NONE`"
+        ));
+    }
+    glFramebufferTextureLayer(
+        Target,
+        attachment_,
+        texture_->id(),
+        level_,
+        layer_
+    );
+    _attachments[attachment_] = texture_;
+}
+
+void FrameBufferBase::attach(
+    GLenum attachment_,
+    std::shared_ptr<Texture> texture_,
+    unsigned int level_
+) {
+    declare();
+    if (attachment_ == GL_NONE) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "Cannot attach object to `GL_NONE`"
+            ));
+    }
+    if (texTypeIs2D(texture_->Target)) {
+        glFramebufferTexture2D(
+            Target,
+            attachment_,
+            texture_->Target,
+            texture_->id(),
+            level_
+        );
+    } else {
+        glFramebufferTexture1D(
+            Target,
+            attachment_,
+            texture_->Target,
+            texture_->id(),
+            level_
+        );
+    }
+    _attachments[attachment_] = texture_;
+}
+
+void FrameBufferBase::bind() const {
+    if (_id) {
+        glBindFramebuffer(Target, _id);
+    } else {
+        THROW(OGLError(
+            OGLError::Codes::INVALID_OBJECT,
+            "w/ FrameBuffer"
+        ));
+    }
+}
+
+void FrameBufferBase::unbind() const {
+    glBindFramebuffer(Target, 0);
+}
+
+GLenum FrameBufferBase::status() const {
+    bind();
+    return glCheckFramebufferStatus(Target);
+}
+
+FrameBufferBase::AttachmentMap FrameBufferBase::getAllBuffers() const {
+    return _attachments;
+}
+
+std::shared_ptr<RenderTarget> FrameBufferBase::getBuffer(GLenum attch_) const {
+    try {
+        return _attachments.at(attch_);
+    } catch (const std::out_of_range& e) {
+        THROW(e);
+    }
+}
+
+// class ReadFrameBuffer
+
+ReadFrameBuffer::ReadFrameBuffer()
+: _location(GL_NONE), FrameBufferBase(GL_READ_FRAMEBUFFER) {}
+
+ReadFrameBuffer& ReadFrameBuffer::operator=(WriteFrameBuffer&& mv) {
+    if (mv.id()) {
+        _attachments = mv.getAllBuffers();
+        mv.setWriteBuffer(GL_NONE);
+        mv._attachments = {};
+        mv._locations = {};
+        FrameBufferBase::OpenGLObject::operator=(std::move(mv));
+    }
+    return *this;
+}
+
+ReadFrameBuffer& ReadFrameBuffer::operator=(ReadFrameBuffer&& mv) {
+    if (mv.id()) {
+        _attachments = mv._attachments;
+        _location = mv._location;
+        mv._attachments = {};
+        mv._location = GL_NONE;
+        FrameBufferBase::OpenGLObject::operator=(std::move(mv));
+    }
+    return *this;
+}
+
+std::shared_ptr<RenderTarget> ReadFrameBuffer::getReadBuffer() const {
+    if (_location == GL_NONE) { return nullptr; }
+    return getBuffer(_location);
+}
+
+GLenum ReadFrameBuffer::getReadLocation() const { return _location; }
+
+std::shared_ptr<RenderTarget> ReadFrameBuffer::setReadBuffer(GLenum attch_) {
+    bind();
+    if (attch_!=GL_NONE) {
+        try {
+            const auto& x = _attachments.at(attch_);
+        } catch (const std::out_of_range& e) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "No buffer set at attachment"
+            ));
+        }
+    }
+    _location = attch_;
+    glReadBuffer(_location);
+    return getReadBuffer();
+}
+
+// class WriteFrameBuffer
+
+WriteFrameBuffer::WriteFrameBuffer()
+: FrameBufferBase(GL_DRAW_FRAMEBUFFER) {}
+
+WriteFrameBuffer& WriteFrameBuffer::operator=(ReadFrameBuffer&& rhs) {
+    if (rhs.id()) {
+        _attachments = rhs._attachments;
+        rhs.setReadBuffer(GL_NONE);
+        rhs._attachments = {};
+        rhs._location = GL_NONE;
+        FrameBufferBase::OpenGLObject::operator=(std::move(rhs));
+    }
+    return *this;
+}
+
+WriteFrameBuffer& WriteFrameBuffer::operator=(WriteFrameBuffer&& rhs) {
+    if (rhs.id()) {
+        _attachments = rhs._attachments;
+        _locations = rhs._locations;
+        rhs._attachments = {};
+        rhs._locations = {};
+        FrameBufferBase::OpenGLObject::operator=(std::move(rhs));
+    }
+    return *this;
+}
+
+using fRGBA = RGBA<float>;
+
+std::vector<std::shared_ptr<Texture>> WriteFrameBuffer::getWriteBuffers() const {
+    const size_t count = _locations.size();
+    std::vector<std::shared_ptr<Texture>> ret(count);
+    for (int i = 0; i < count; ++i) {
+        ret[i] = std::static_pointer_cast<Texture>(getBuffer(_locations[i]));
+    }
+    return ret;
+}
+
+std::vector<GLenum> WriteFrameBuffer::getWriteLocations() const {
+    return _locations;
+}
+
+WriteFrameBuffer::DrawTexVec WriteFrameBuffer::setWriteBuffers(const std::vector<GLenum>& attchs_) {
+    bind();
+    for (GLenum loc : attchs_) {
+        if (getBuffer(loc)->Target == GL_RENDERBUFFER) {
+            THROW(FrameBufferError(FrameBufferError::INVALID_VALUE,
+                "Cannot write to renderbuffer [ @ Attachment = "+std::to_string(loc)+" ]"
+            ));
+        }
+    }
+    _locations = attchs_;
+    glDrawBuffers(_locations.size(), _locations.data());
+    return getWriteBuffers();
+}
+
+std::shared_ptr<Texture> WriteFrameBuffer::setWriteBuffer(GLenum attch_) {
+    bind();
+    if (attch_ == GL_NONE) {
+        std::vector<GLenum> tmp(_locations.size(), GL_NONE);
+        glDrawBuffers(tmp.size(), tmp.data());
+        _locations = {};
+        return nullptr;
+    }
+    setWriteBuffers({attch_});
+    return std::static_pointer_cast<Texture>(getBuffer(attch_));
+}
+
+fRGBA WriteFrameBuffer::clearColorValue() const {
+    bind();
+    float rgba[4];
+    glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba);
+    return fRGBA{rgba[0], rgba[1], rgba[2], rgba[3]};
+}
+
+fRGBA WriteFrameBuffer::clearColorValue(const fRGBA& color) {
+    declare();
+    glClearColor(color.r, color.g, color.b, color.a);
+    return color;
+} 
+
+fRGBA WriteFrameBuffer::clearColorValue(float r, float g, float b, float a) {
+    return clearColorValue({r, g,b , a});
+}
+
+double WriteFrameBuffer::clearDepthValue() const {
+    bind();
+    double ret;
+    glGetDoublev(GL_DEPTH_CLEAR_VALUE, &ret);
+    return ret;
+}
+
+double WriteFrameBuffer::clearDepthValue(double d_) {
+    declare();
+    glClearDepth(d_);
+    return d_;
+}
+
+GLint WriteFrameBuffer::clearStencilValue() const {
+    bind();
+    GLint ret;
+    glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &ret);
+    return ret;
+}
+
+GLint WriteFrameBuffer::clearStencilValue(GLint s_) {
+    declare();
+    glClearStencil(s_);
+    return s_;
+}
+
+void WriteFrameBuffer::clear(GLbitfield mask_) const {
+    bind();
+    glClear(mask_);
+}
+
+void WriteFrameBuffer::clearDepth() const {
+    clear(GL_DEPTH_BUFFER_BIT);
+}
+
+void WriteFrameBuffer::clearDepth(float val_) const {
+    bind();
+    glClearBufferfv(GL_DEPTH, 0, &val_);
+}
+
+void WriteFrameBuffer::clearStencil() const {
+    clear(GL_STENCIL_BUFFER_BIT);
+}
+
+void WriteFrameBuffer::clearStencil(GLint val_) const {
+    bind();
+    glClearBufferiv(GL_STENCIL, 0, &val_);
+}
+
+void WriteFrameBuffer::clearDepthStencil() const {
+    clear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+}
+
+void WriteFrameBuffer::clearDepthStencil(float d_, GLint s_) const {
+    bind();
+    glClearBufferfi(GL_DEPTH_STENCIL, 0, d_, s_);
+}
+
+FrameBuffer::FrameBuffer()
+: FrameBufferBase(GL_FRAMEBUFFER) {}
+
+FrameBuffer& FrameBuffer::operator=(FrameBuffer&& rhs) {
+    if (rhs.id()) {
+        _attachments = rhs._attachments;
+        _location = rhs._location;
+        _locations = rhs._locations;
+        rhs._attachments = {};
+        rhs._locations = {};
+        rhs._location = GL_NONE;
+        OpenGLObject::operator=(std::move(rhs));
+    }
+    return *this;
+}
+
+FrameBuffer& FrameBuffer::operator=(ReadFrameBuffer&& rhs) {
+    ReadFrameBuffer::operator=(std::move(rhs));
+    return *this;
+}
+
+FrameBuffer& FrameBuffer::operator=(WriteFrameBuffer&& rhs) {
+    WriteFrameBuffer::operator=(std::move(rhs));
+    return *this;
+}
+
+} // namespace nb