UpdateData in VRamList & QOL changes.

include/JGL/types/Texture.h

@@ -34,13 +34,13 @@ namespace JGL {
         TextureWrappingMode texture_wrapping_mode;
         void load(SoftwareTexture* software_texture, const Vector2& size, const TextureFormat& format, TextureFilteringMode filtering_mode, TextureWrappingMode wrapping_mode);
     public:
+        Texture() = default;
         /// Load a texture from a file,
         explicit Texture(const std::string& file, TextureFilteringMode filtering_mode = TextureFilteringMode::BILINEAR, TextureWrappingMode wrapping_mode = TextureWrappingMode::CLAMP_TO_EDGE);
         Texture(const std::string& file, const TextureFlag& flags, TextureFilteringMode filtering_mode = TextureFilteringMode::BILINEAR, TextureWrappingMode wrapping_mode = TextureWrappingMode::CLAMP_TO_EDGE);
         /* Initialize a texture filled with trash data
         this is primarily for the RenderTarget */
         explicit Texture(const Vector2& size);
-        Texture() = default;
     public:
         [[nodiscard]] GLuint GetGLTextureHandle() const;
         [[nodiscard]] Vector2 GetDimensions() const;

include/JGL/types/VRamList.h

@@ -1,72 +1,64 @@
 #pragma once
+#include <vector>
 #include <glad/glad.h>
 #include <J3ML/LinearAlgebra/Vector2.hpp>
+#include <J3ML/LinearAlgebra/Vector2i.hpp>
 #include <J3ML/LinearAlgebra/Vector3.hpp>
 #include <J3ML/LinearAlgebra/Vector4.hpp>
-#include <JGL/logger/logger.h>
-#include <type_traits>
-#include <vector>
-#include <cstring>
-#include <string>
 
 namespace JGL {
     class VRamList;
 }
 
-/// A wrapper for VBO, Storing texture coordinates or vertices or indices in vram.
+/// A wrapped for "Vertex Buffer Object" In OpenGL, Store things in VRam.
 class JGL::VRamList {
 private:
     GLuint list_handle = 0;
-    long size = 0;
+    long num_elements = 0;
     bool element_array_buffer = false;
-
     void load(const GLfloat* data, const long& size);
     void load(const GLuint* data, const long& size);
+    void SetData(void* data, const long& length);
+    void UpdateData(void* data, const long& offset, const long& length);
 public:
     VRamList() = default;
-    VRamList(const GLuint* data, const long& size);
-    VRamList(const GLfloat* data, const long& size);
-    VRamList(Vector2* data, const long& size);
-    VRamList(Vector3* data, const long& size);
-    VRamList(Vector4* data, const long& size);
+    VRamList(const GLuint* data, const long& length);
+    VRamList(const GLfloat* data, const long& length);
+    VRamList(Vector2* data, const long& length);
+    VRamList(Vector3* data, const long& length);
+    VRamList(Vector4* data, const long& length);
 public:
     [[nodiscard]] GLuint GetHandle() const;
-    /// Returns the number of GLfloat or GLuint in the list.
-    [[nodiscard]] long GetSize() const;
+    /// Returns the number of elements in the list.
+    [[nodiscard]] long GetLength() const;
     /// Returns the size of the data in bytes.
-    [[nodiscard]] long GetDataSize() const;
-    [[nodiscard]] bool IsIntegerArray() const;
+    [[nodiscard]] size_t GetSize() const;
+    /** Get VBO data back from the GPU. This is *bad* because the CPU is going to wait
+    * for the transfer to finish. Has limited use other than testing. */
+    [[nodiscard]] std::vector<GLfloat> GetDataF() const;
+    [[nodiscard]] std::vector<GLuint> GetDataUI() const;
     [[nodiscard]] bool IsFloatArray() const;
+    /// Deallocate the vram the vbo took up.
     void Erase();
+    /** Replace the data of an existing VBO in it's entirety. Must be same type.
+      * "length" refers to the number of elements in data. Not the number of bytes. */
+    void SetData(const GLfloat* data, const long& length);
+    void SetData(const Vector2* data, const long& length);
+    void SetData(const Vector3* data, const long& length);
+    void SetData(const Vector4* data, const long& length);
 
-    /// Update the data of an existing VBO. Data would be the same type as the list already is.
-    /// "size" refers to the number of elements in data. Not the number of bytes.
-    void SetData(void* data, const long& size);
+    void SetData(const GLuint* data, const long& length);
+    void SetData(const Vector2i* data, const long& length);
 
-    /* Get VBO data back from the GPU. This is *very* slow because the CPU is going to wait
-    for the transfer to finish. I don't know why you'd want to do this outside of testing reasons.*/
-    template <typename T>
-    [[nodiscard]] std::vector<T> GetData() const {
-        GLenum buffer_type;
-        GLint current_buffer = 0;
-        if constexpr (std::is_same<T, GLfloat>::value)
-            buffer_type = GL_ARRAY_BUFFER,
-            glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_buffer);
-        else if constexpr (std::is_same<T, GLuint>::value)
-            buffer_type = GL_ELEMENT_ARRAY_BUFFER,
-            glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_buffer);
-        else
-            jlog::Fatal("Typename T must be either GLfloat or GLuint.");
+    /** Update only a portion of the data in a VBO. Must be same type.
+     * "length" refers to the number of elements in data. Not the number of bytes.
+     * "offset" refers the number of Typename T into the buffer the data you want to change is.
+     * For ex, offset 0 and length of 1 overwrites the first value. Offset 1 the second etc */
+     void UpdateData(const GLfloat* data, const long& offset, const long& length);
+     void UpdateData(const Vector2* data, const long& offset, const long& length);
+     void UpdateData(const Vector3* data, const long& offset, const long& length);
+     void UpdateData(const Vector4* data, const long& offset, const long& length);
 
-        if ((element_array_buffer && buffer_type == GL_ARRAY_BUFFER) || (!element_array_buffer && buffer_type == GL_ELEMENT_ARRAY_BUFFER))
-            jlog::Fatal("Returning the contents of a VRamList using the incorrect Typename T?");
-
-        glBindBuffer(buffer_type, list_handle);
-        std::vector<T> data(size);
-        memcpy(data.data(), glMapBuffer(buffer_type, GL_READ_ONLY), size * sizeof(T));
-        glUnmapBuffer(buffer_type);
-        glBindBuffer(buffer_type, current_buffer);
-
-        return data;
-    }
+     void UpdateData(const GLuint* data, const long& offset, const long& length);
+     void UpdateData(const Vector2i* data, const long& offset, const long& length);
 };

src/types/VRamList.cpp

@@ -1,52 +1,32 @@
 #include <JGL/types/VRamList.h>
-#include <jlog/Logger.hpp>
+#include <JGL/logger/logger.h>
 #include <cstring>
 
-void JGL::VRamList::load(const GLfloat* data, const long& s) {
+void JGL::VRamList::load(const GLfloat* data, const long& size) {
     GLint current_array_buffer = 0;
     glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_array_buffer);
     glGenBuffers(1, &list_handle);
     glBindBuffer(GL_ARRAY_BUFFER, list_handle);
-    glBufferData(GL_ARRAY_BUFFER, s, data, GL_STATIC_DRAW);
+    glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
     glBindBuffer(GL_ARRAY_BUFFER, current_array_buffer);
     element_array_buffer = false;
-    size = s / sizeof(GLfloat);
+    num_elements = size / sizeof(GLfloat);
 }
 
-void JGL::VRamList::load(const GLuint* data, const long& s) {
+void JGL::VRamList::load(const GLuint* data, const long& size) {
     GLint current_element_array_buffer = 0;
     glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_element_array_buffer);
     glGenBuffers(1, &list_handle);
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, list_handle);
-    glBufferData(GL_ELEMENT_ARRAY_BUFFER, s, data, GL_STATIC_DRAW);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, current_element_array_buffer);
     element_array_buffer = true;
-    size = s / sizeof(GLuint);
-}
-
-JGL::VRamList::VRamList(const GLfloat* data, const long& size) {
-    load(data, (long) sizeof(GLfloat) * size);
-}
-
-JGL::VRamList::VRamList(const GLuint* data, const long& size) {
-    load(data, (long) sizeof(GLuint) * size);
-}
-
-JGL::VRamList::VRamList(Vector2* data, const long& size) {
-    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector2) * size);
-}
-
-JGL::VRamList::VRamList(Vector3* data, const long& size) {
-    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector3) * size);
-}
-
-JGL::VRamList::VRamList(Vector4* data, const long& size) {
-    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector4) * size);
+    num_elements = size / sizeof(GLuint);
 }
 
 void JGL::VRamList::Erase() {
     if (list_handle == 0)
-        jlog::Warning("Erasing an uninitialized array buffer?");
+        JGL::Logger::Fatal("Erasing an uninitialized VRamList?");
 
     GLint current_element_array_buffer = 0;
     glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_element_array_buffer);
@@ -54,10 +34,10 @@ void JGL::VRamList::Erase() {
     glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_array_buffer);
 
     if (element_array_buffer && current_element_array_buffer == list_handle)
-        jlog::Warning("Erasing an element array buffer while it's in use?");
+        JGL::Logger::Warning("Erasing an element array buffer while it's in use?");
 
     else if (!element_array_buffer && current_array_buffer == list_handle)
-        jlog::Warning("Erasing an array buffer while it's in use?");
+        JGL::Logger::Warning("Erasing an array buffer while it's in use?");
 
     glDeleteBuffers(1, &list_handle);
 }
@@ -66,35 +46,31 @@ GLuint JGL::VRamList::GetHandle() const {
     return list_handle;
 }
 
-bool JGL::VRamList::IsIntegerArray() const {
-    return element_array_buffer;
-}
-
 bool JGL::VRamList::IsFloatArray() const {
     return !element_array_buffer;
 }
 
-long JGL::VRamList::GetSize() const {
-    return size;
+long JGL::VRamList::GetLength() const {
+    return num_elements;
 }
 
-long JGL::VRamList::GetDataSize() const {
+size_t JGL::VRamList::GetSize() const {
     if (element_array_buffer)
-        return (long) sizeof(GLuint) * size;
-    return (long) sizeof(GLfloat) * size;
+        return sizeof(GLuint) * num_elements;
+    return sizeof(GLfloat) * num_elements;
 }
 
-void JGL::VRamList::SetData(void* data, const long& size) {
-    bool should_resize = (this->size != size);
+void JGL::VRamList::SetData(void* data, const long& length) {
+    bool should_resize = (this->num_elements != length);
 
     if (should_resize) {
         glDeleteBuffers(1, &list_handle);
         list_handle = 0;
 
         if (!element_array_buffer)
-            load((GLfloat*) data, sizeof(GLfloat) * size);
+            load((GLfloat*) data, sizeof(GLfloat) * length);
         else
-            load((GLuint*) data, sizeof(GLuint) * size);
+            load((GLuint*) data, sizeof(GLuint) * length);
         return;
     }
 
@@ -108,13 +84,169 @@ void JGL::VRamList::SetData(void* data, const long& size) {
     glGetIntegerv(buffer_binding, &current_buffer);
     glBindBuffer(buffer_type, list_handle);
 
-    void* buffer_data = glMapBuffer(buffer_type, GL_WRITE_ONLY);
-    if (buffer_data == nullptr)
-        jlog::Fatal("Mapping in a VBO that doesn't exist?");
+    void* vram = glMapBuffer(buffer_type, GL_WRITE_ONLY);
+    if (!vram)
+        JGL::Logger::Fatal("Mapping in a VBO that doesn't exist?");
+
+    memcpy(vram, data, (element_array_buffer ? sizeof(GLuint) : sizeof(GLfloat)) * length);
     
-    memcpy(buffer_data, data, (element_array_buffer ? sizeof(GLuint) : sizeof(GLfloat)) * size);
     if (!glUnmapBuffer(buffer_type))
-        jlog::Fatal("We couldn't unmap the buffer?");
+        JGL::Logger::Fatal("We couldn't unmap the buffer?");
 
     glBindBuffer(buffer_type, current_buffer);
 }
+
+void JGL::VRamList::UpdateData(void* data, const long& offset, const long& length) {
+
+    if (offset + length > num_elements) {
+        JGL::Logger::Warning("Using UpdateData to out-of-bounds write the VRamList? I'll resize it for you, But this is slow.");
+        unsigned long oob_delta = (offset + length) - num_elements;
+
+        if (element_array_buffer) {
+            auto list_data = GetDataUI();
+            list_data.resize(list_data.size() + oob_delta);
+            memcpy(list_data.data() + (offset * sizeof(GLuint)), data, length * sizeof(GLuint));
+            SetData(list_data.data(), list_data.size());
+        }
+        else {
+            auto list_data = GetDataF();
+            list_data.resize(list_data.size() + oob_delta);
+            memcpy(list_data.data() + (offset * sizeof(GLfloat)), data, length * sizeof(GLfloat));
+            SetData(list_data.data(), list_data.size());
+        }
+    }
+
+    GLint current_buffer = 0;
+    GLenum buffer_type = GL_ARRAY_BUFFER;
+    GLenum buffer_binding = GL_ARRAY_BUFFER_BINDING;
+
+    if (element_array_buffer)
+        buffer_type = GL_ELEMENT_ARRAY_BUFFER,
+        buffer_binding = GL_ELEMENT_ARRAY_BUFFER_BINDING;
+
+    glGetIntegerv(buffer_binding, &current_buffer);
+    glBindBuffer(buffer_type, list_handle);
+
+    void* vram = glMapBuffer(buffer_type, GL_WRITE_ONLY);
+    if (!vram)
+        JGL::Logger::Fatal("Mapping in a VBO that doesn't exist?");
+
+    size_t element_size = element_array_buffer ? sizeof(GLuint) : sizeof(GLfloat);
+    memcpy(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(vram) + (offset * element_size)), data, length * element_size);
+
+    if (!glUnmapBuffer(buffer_type))
+        JGL::Logger::Fatal("We couldn't unmap the buffer?");
+
+    glBindBuffer(buffer_type, current_buffer);
+}
+
+std::vector<GLfloat> JGL::VRamList::GetDataF() const {
+    if (element_array_buffer)
+        JGL::Logger::Warning("Getting data as GLfloat but the buffer data is GLuint?");
+
+    GLint current_buffer = 0;
+    glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &current_buffer);
+    glBindBuffer(GL_ARRAY_BUFFER, list_handle);
+
+    std::vector<GLfloat> data(num_elements);
+    void* vram = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
+    if (vram == nullptr)
+        JGL::Logger::Fatal("Mapping in a VBO that doesn't exist?");
+
+    memcpy(data.data(), vram, num_elements * sizeof(GLfloat));
+
+    glUnmapBuffer(GL_ARRAY_BUFFER);
+    glBindBuffer(GL_ARRAY_BUFFER, current_buffer);
+
+    return data;
+}
+
+std::vector<GLuint> JGL::VRamList::GetDataUI() const {
+    if (!element_array_buffer)
+        JGL::Logger::Warning("Getting data as GLuint but the buffer data is GLfloat?");
+
+    GLint current_buffer = 0;
+    glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &current_buffer);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, list_handle);
+    std::vector<GLuint> data(num_elements);
+
+    void* vram = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_READ_ONLY);
+    if (vram == nullptr)
+        JGL::Logger::Fatal("Mapping in a VBO that doesn't exist?");
+
+    memcpy(data.data(), vram, num_elements * sizeof(GLuint));
+
+    glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, current_buffer);
+
+    return data;
+}
+
+JGL::VRamList::VRamList(const GLfloat* data, const long& length) {
+    load(data, (long) sizeof(GLfloat) * length);
+}
+
+JGL::VRamList::VRamList(const GLuint* data, const long& length) {
+    load(data, (long) sizeof(GLuint) * length);
+}
+
+JGL::VRamList::VRamList(Vector2* data, const long& length) {
+    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector2) * length);
+}
+
+JGL::VRamList::VRamList(Vector3* data, const long& length) {
+    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector3) * length);
+}
+
+JGL::VRamList::VRamList(Vector4* data, const long& length) {
+    load(reinterpret_cast<GLfloat*>(data), (long) sizeof(Vector4) * length);
+}
+
+void JGL::VRamList::SetData(const GLfloat* data, const long& length) {
+    SetData((void*) data, length);
+}
+
+void JGL::VRamList::SetData(const Vector2* data, const long& length) {
+    SetData((void*) data, length * 2);
+}
+
+void JGL::VRamList::SetData(const Vector3* data, const long& length) {
+    SetData((void*) data, length * 3);
+}
+
+void JGL::VRamList::SetData(const Vector4* data, const long& length) {
+    SetData((void*) data, length * 4);
+}
+
+void JGL::VRamList::SetData(const GLuint* data, const long& length) {
+    SetData((void*) data, length);
+}
+
+void JGL::VRamList::SetData(const Vector2i* data, const long& length) {
+    SetData((void*) data, length * 2);
+}
+
+void JGL::VRamList::UpdateData(const GLfloat* data, const long& offset, const long& length) {
+    UpdateData((void*) data, offset, length);
+}
+
+void JGL::VRamList::UpdateData(const Vector2* data, const long& offset, const long& length) {
+    UpdateData((void*) data, offset, length * 2);
+}
+
+void JGL::VRamList::UpdateData(const Vector3* data, const long& offset, const long& length) {
+    UpdateData((void*) data, offset, length * 3);
+}
+
+void JGL::VRamList::UpdateData(const Vector4* data, const long& offset, const long& length) {
+    UpdateData((void*) data, offset, length * 4);
+}
+
+void JGL::VRamList::UpdateData(const GLuint* data, const long& offset, const long& length) {
+    UpdateData((void*) data, offset, length);
+}
+
+void JGL::VRamList::UpdateData(const Vector2i* data, const long& offset, const long& length) {
+    UpdateData((void*) data, offset, length * 2);
+}