move some code there and here

src/graphics/core/DrawContext.cpp

@@ -74,6 +74,18 @@ DrawContext::~DrawContext() {
     if (lineWidth != parent->lineWidth) {
         glLineWidth(parent->lineWidth);
     }
+
+    for (int i = 0; i < textures.size(); i++) {
+        auto texture = parent->textures[i];
+        if (textures[i] != texture) {
+            glActiveTexture(GL_TEXTURE0 + i);
+            if (texture == nullptr) {
+                glBindTexture(GL_TEXTURE_2D, 0);
+            } else {
+                texture->bind();
+            }
+        }
+    }
 }
 
 const glm::uvec2& DrawContext::getViewport() const {
@@ -154,3 +166,13 @@ void DrawContext::setLineWidth(float width) {
     lineWidth = width;
     glLineWidth(width);
 }
+
+void DrawContext::useTexture(int target, const Bindable* texture) {
+    glActiveTexture(GL_TEXTURE0 + target);
+    if (texture == nullptr) {
+        glBindTexture(GL_TEXTURE_2D, 0);
+    } else {
+        texture->bind();
+    }
+    textures.at(target) = texture;
+}

src/graphics/core/DrawContext.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <array>
 #include <glm/vec2.hpp>
 #include <glm/vec4.hpp>
 
@@ -23,6 +24,7 @@ class DrawContext {
     BlendMode blendMode = BlendMode::normal;
     int scissorsCount = 0;
     float lineWidth = 1.0f;
+    std::array<const Bindable*, advanced_pipeline::TARGETS_COUNT> textures {};
 public:
     DrawContext(
         const DrawContext* parent,
@@ -44,4 +46,5 @@ public:
     void setBlendMode(BlendMode mode);
     void setScissors(const glm::vec4& area);
     void setLineWidth(float width);
+    void useTexture(int target, const Bindable* texture);
 };

src/graphics/core/Framebuffer.cpp

@@ -84,11 +84,11 @@ void Framebuffer::setTexture(std::unique_ptr<Texture> texture) {
     this->texture = std::move(texture);
 }
 
-void Framebuffer::bind() {
+void Framebuffer::bind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 }
 
-void Framebuffer::unbind() {
+void Framebuffer::unbind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 

src/graphics/core/Framebuffer.hpp

@@ -21,10 +21,10 @@ public:
     void setTexture(std::unique_ptr<Texture> texture);
 
     /// @brief Use framebuffer
-    void bind() override;
+    void bind() const override;
 
     /// @brief Stop using framebuffer
-    void unbind() override;
+    void unbind() const override;
 
     /// @brief Update framebuffer texture size
     /// @param width new width

src/graphics/core/GBuffer.cpp

@@ -189,7 +189,7 @@ GBuffer::~GBuffer() {
     glDeleteFramebuffers(1, &ssaoFbo);
 }
 
-void GBuffer::bind() {
+void GBuffer::bind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
     glClear(GL_COLOR_BUFFER_BIT);
 }
@@ -198,7 +198,7 @@ void GBuffer::bindSSAO() const {
     glBindFramebuffer(GL_FRAMEBUFFER, ssaoFbo);
 }
 
-void GBuffer::unbind() {
+void GBuffer::unbind() const {
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 }
 

src/graphics/core/GBuffer.hpp

@@ -9,9 +9,9 @@ public:
     GBuffer(uint width, uint height);
     ~GBuffer() override;
 
-    void bind() override;
+    void bind() const override;
     void bindSSAO() const;
-    void unbind() override;
+    void unbind() const override;
 
     void bindBuffers() const;
     void bindSSAOBuffer() const;

src/graphics/core/Texture.hpp

@@ -1,12 +1,13 @@
 #pragma once
 
-#include "typedefs.hpp"
-#include "maths/UVRegion.hpp"
-#include "ImageData.hpp"
-
 #include <memory>
 
-class Texture {
+#include "ImageData.hpp"
+#include "commons.hpp"
+#include "maths/UVRegion.hpp"
+#include "typedefs.hpp"
+
+class Texture : public Bindable {
 protected:
     uint id;
     uint width;
@@ -17,8 +18,8 @@ public:
     Texture(const ubyte* data, uint width, uint height, ImageFormat format);
     virtual ~Texture();
 
-    virtual void bind() const;
-    virtual void unbind() const;
+    virtual void bind() const override;
+    virtual void unbind() const override;
     virtual void reload(const ubyte* data, uint w, uint h);
     void reloadPartial(const ImageData& image, uint x, uint y, uint w, uint h);
 

src/graphics/core/commons.hpp

@@ -59,6 +59,8 @@ namespace advanced_pipeline {
     inline constexpr int TARGET_SSAO = 5;
     inline constexpr int TARGET_SHADOWS0 = 6;
     inline constexpr int TARGET_SHADOWS1 = 7;
+    
+    inline constexpr int TARGETS_COUNT = 8;
 }
 
 VC_ENUM_METADATA(CursorShape)
@@ -85,6 +87,6 @@ class Bindable {
 public:
     virtual ~Bindable() = default;
 
-    virtual void bind() = 0;
-    virtual void unbind() = 0;
+    virtual void bind() const = 0;
+    virtual void unbind() const = 0;
 };