rayjs/examples/textures/textures_to_image.c

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2023-05-25 21:12:11 +00:00
/*******************************************************************************************
*
* raylib [textures] example - Retrieve image data from texture: LoadImageFromTexture()
*
* NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
*
* Example originally created with raylib 1.3, last time updated with raylib 4.0
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
* Copyright (c) 2015-2023 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture to image");
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Image image = LoadImage("resources/raylib_logo.png"); // Load image data into CPU memory (RAM)
Texture2D texture = LoadTextureFromImage(image); // Image converted to texture, GPU memory (RAM -> VRAM)
UnloadImage(image); // Unload image data from CPU memory (RAM)
image = LoadImageFromTexture(texture); // Load image from GPU texture (VRAM -> RAM)
UnloadTexture(texture); // Unload texture from GPU memory (VRAM)
texture = LoadTextureFromImage(image); // Recreate texture from retrieved image data (RAM -> VRAM)
UnloadImage(image); // Unload retrieved image data from CPU memory (RAM)
//---------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
// TODO: Update your variables here
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2, WHITE);
DrawText("this IS a texture loaded from an image!", 300, 370, 10, GRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(texture); // Texture unloading
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}