[examples] FXAA anti-alising example for RenderTexture about raylib HOT 8 CLOSED

#include "raylib.h"

//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    SetConfigFlags(FLAG_WINDOW_HIGHDPI);

    InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d camera free");

    // Define the camera to look into our 3d world
    Camera3D camera = { 0 };
    camera.position = (Vector3){ 10.0f, 10.0f, 10.0f }; // Camera position
    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };      // Camera looking at point
    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
    camera.fovy = 45.0f;                                // Camera field-of-view Y
    camera.projection = CAMERA_PERSPECTIVE;             // Camera projection type

    Vector3 cubePosition = { 0.0f, 0.0f, 0.0f };

    DisableCursor();                    // Limit cursor to relative movement inside the window

    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    int width = GetRenderWidth();
    int height = GetRenderHeight();
    RenderTexture2D renderTexture = LoadRenderTexture(width, height);

    // Main game loop
    while (!WindowShouldClose())        // Detect window close button or ESC key
    {
        //Since our render texture is tied to our render resolution we need to reload it when window size changes
        //That can happen when changing the window size directly, when changing scaling factor of our current display or dragging the window to a display with a different scaling factor
        if (IsWindowResized()) {
            UnloadRenderTexture(renderTexture);
            int width = GetRenderWidth();
            int height = GetRenderHeight();
            renderTexture = LoadRenderTexture(width, height);
        }

        // Update
        //----------------------------------------------------------------------------------
        UpdateCamera(&camera, CAMERA_FREE);

        if (IsKeyPressed('Z')) camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();
            
        BeginTextureMode(renderTexture);
            ClearBackground(RAYWHITE);

            BeginMode3D(camera);

                DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
                DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);

                DrawGrid(10, 1.0f);

            EndMode3D();

            DrawRectangle( 10, 10, 320, 93, Fade(SKYBLUE, 0.5f));
            DrawRectangleLines( 10, 10, 320, 93, BLUE);

            DrawText("Free camera default controls:", 20, 20, 10, BLACK);
            DrawText("- Mouse Wheel to Zoom in-out", 40, 40, 10, DARKGRAY);
            DrawText("- Mouse Wheel Pressed to Pan", 40, 60, 10, DARKGRAY);
            DrawText("- Z to zoom to (0, 0, 0)", 40, 80, 10, DARKGRAY);

        EndTextureMode();

        DrawTexturePro(renderTexture.texture, (Rectangle) { 0, 0, renderTexture.texture.width, -renderTexture.texture.height }, (Rectangle) { 0, 0, screenWidth, screenHeight }, (Vector2) {0.0, 0.0}, 0, WHITE);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}

#include "rlgl.h"
unsigned char *imgData = rlReadScreenPixels(screenWidth, screenHeight);
Image img = { imgData, screenWidth, screenHeight, 1, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8 };