RenderTarget GetData

Async GetData is todo

include/JGL/types/RenderTarget.h

@@ -27,6 +27,8 @@ public:
     [[nodiscard]] GLuint GetGLFramebufferObjectHandle() const;
     [[nodiscard]] GLuint GetGLDepthBufferHandle() const;
     [[nodiscard]] Color4 GetClearColor() const;
+    /// Get the data back from the FBO. This is *not* async friendly.
+    [[nodiscard]] std::vector<GLfloat> GetData() const;
 public:
     /// Create a render target for a texture that already exists. For decals.
     explicit RenderTarget(const Texture& texture, const Color4& clear_color = Colors::Black, bool use_depth = false);

include/JGL/types/VRamList.h

@@ -42,10 +42,9 @@ public:
     /// Get list data back from the GPU. This is *very* slow.
     /// It's not recommended you use this in your normal rendering routines.
     template <typename T>
-    [[nodiscard]] std::vector<T> GetListData() const {
+    [[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);

src/types/RenderTarget.cpp

@@ -91,3 +91,14 @@ JGL::RenderTarget::RenderTarget(const Vector2& size, const Color4& clear_color,
     this->clear_color = clear_color;
     this->size = size;
 }
+
+std::vector<GLfloat> JGL::RenderTarget::GetData() const {
+    std::vector<GLfloat> data(GetDimensions().x * GetDimensions().y * 4);
+    GLuint current_fbo = GetActiveGLFramebufferHandle();
+
+    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_object);
+    glReadPixels(0, 0, GetDimensions().x, GetDimensions().y, GL_RGBA, GL_FLOAT, data.data());
+    glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
+    return data;
+
+}