From 5906421dcf3c49664f9f54b89be95cd8817b8845 Mon Sep 17 00:00:00 2001
From: Stepanov Igor <ygrik2003@yandex.ru>
Date: Tue, 7 Oct 2025 23:28:17 +0300
Subject: [PATCH] restore screenshot logic

---
 src/window/detail/window_sdl.cpp | 13 ++++++++++++-
 src/window/detail/window_sdl.hpp |  4 ++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/window/detail/window_sdl.cpp b/src/window/detail/window_sdl.cpp
index 5b43cfcad..b8a4054d0 100644
--- a/src/window/detail/window_sdl.cpp
+++ b/src/window/detail/window_sdl.cpp
@@ -4,6 +4,8 @@
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_error.h>
 #include <SDL3/SDL_mouse.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_surface.h>
 #include <SDL3/SDL_timer.h>
 #include <SDL3/SDL_version.h>
 #include <SDL3/SDL_video.h>
@@ -212,6 +214,8 @@ window_sdl::window_sdl(DisplaySettings *settings, std::string title) noexcept {
         return;
     }
 
+    renderer = SDL_CreateRenderer(window, "vc_main");
+
     float scale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay());
 
     logger.info() << "monitor content scale: " << scale;
@@ -420,8 +424,15 @@ void window_sdl::setFramerate(int framerate) {
 }
 
 // todo: move somewhere
+// Possible do with SDL_RenderReadPixels
 std::unique_ptr<ImageData> window_sdl::takeScreenshot() {
-    return {};
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    auto data = std::make_unique<ubyte[]>(size.x * size.y * 3);
+    glPixelStorei(GL_PACK_ALIGNMENT, 1);
+    glReadPixels(0, 0, size.x, size.y, GL_RGB, GL_UNSIGNED_BYTE, data.get());
+    return std::make_unique<ImageData>(
+        ImageFormat::rgb888, size.x, size.y, data.release()
+    );
 }
 
 [[nodiscard]] bool window_sdl::isValid() const {
diff --git a/src/window/detail/window_sdl.hpp b/src/window/detail/window_sdl.hpp
index 845366f1c..e26fc6768 100644
--- a/src/window/detail/window_sdl.hpp
+++ b/src/window/detail/window_sdl.hpp
@@ -1,11 +1,10 @@
+#include <SDL3/SDL_render.h>
 #include <SDL3/SDL_video.h>
 
 #include <stack>
 
 #include "window/window.hpp"
 
-struct SDL_Window;
-
 class window_sdl final : public Window {
 public:
     window_sdl(DisplaySettings *settings, std::string title) noexcept;
@@ -49,6 +48,7 @@ private:
     bool fullscreen = false;
 
     SDL_Window *window = nullptr;
+    SDL_Renderer *renderer = nullptr;
     SDL_GLContext context = nullptr;
 
     std::stack<glm::vec4> scissorStack;