You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 rivejä
4.6 KiB
105 rivejä
4.6 KiB
/*******************************************************************************************
|
|
*
|
|
* raylib [textures] example - Image loading and drawing on it
|
|
*
|
|
* NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
|
|
*
|
|
* This example has been created using raylib 1.4 (www.raylib.com)
|
|
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
|
|
*
|
|
* Copyright (c) 2016 Ramon Santamaria (@raysan5)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
#include "raylib.h"
|
|
|
|
#if defined(PLATFORM_WEB)
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Global Variables Definition
|
|
//----------------------------------------------------------------------------------
|
|
int screenWidth = 800;
|
|
int screenHeight = 450;
|
|
|
|
Texture2D texture; // Texture, GPU memory (VRAM)
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module Functions Declaration
|
|
//----------------------------------------------------------------------------------
|
|
void UpdateDrawFrame(void); // Update and Draw one frame
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Main Enry Point
|
|
//----------------------------------------------------------------------------------
|
|
int main()
|
|
{
|
|
// Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
InitWindow(screenWidth, screenHeight, "raylib [textures] example - image drawing");
|
|
|
|
Image cat = LoadImage("resources/cat.png"); // Load image in CPU memory (RAM)
|
|
ImageCrop(&cat, (Rectangle){ 100, 10, 280, 380 }); // Crop an image piece
|
|
ImageFlipHorizontal(&cat); // Flip cropped image horizontally
|
|
ImageResize(&cat, 150, 200); // Resize flipped-cropped image
|
|
|
|
Image parrots = LoadImage("resources/parrots.png"); // Load image in CPU memory (RAM)
|
|
|
|
// Draw one image over the other with a scaling of 1.5f
|
|
ImageDraw(&parrots, cat, (Rectangle){ 0, 0, cat.width, cat.height }, (Rectangle){ 30, 40, cat.width*1.5f, cat.height*1.5f });
|
|
ImageCrop(&parrots, (Rectangle){ 0, 50, parrots.width, parrots.height - 100 }); // Crop resulting image
|
|
|
|
UnloadImage(cat); // Unload image from RAM
|
|
|
|
texture = LoadTextureFromImage(parrots); // Image converted to texture, uploaded to GPU memory (VRAM)
|
|
UnloadImage(parrots); // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
|
|
|
|
#if defined(PLATFORM_WEB)
|
|
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
|
|
#else
|
|
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
// Main game loop
|
|
while (!WindowShouldClose()) // Detect window close button or ESC key
|
|
{
|
|
UpdateDrawFrame();
|
|
}
|
|
#endif
|
|
|
|
// De-Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
UnloadTexture(texture); // Texture unloading
|
|
|
|
CloseWindow(); // Close window and OpenGL context
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
return 0;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module Functions Definition
|
|
//----------------------------------------------------------------------------------
|
|
void UpdateDrawFrame(void)
|
|
{
|
|
// Update
|
|
//----------------------------------------------------------------------------------
|
|
// TODO: Update your variables here
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw
|
|
//----------------------------------------------------------------------------------
|
|
BeginDrawing();
|
|
|
|
ClearBackground(RAYWHITE);
|
|
|
|
DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 40, WHITE);
|
|
DrawRectangleLines(screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 40, texture.width, texture.height, DARKGRAY);
|
|
|
|
DrawText("We are drawing only one texture from various images composed!", 240, 350, 10, DARKGRAY);
|
|
DrawText("Source images have been cropped, scaled, flipped and copied one over the other.", 190, 370, 10, DARKGRAY);
|
|
|
|
EndDrawing();
|
|
//----------------------------------------------------------------------------------
|
|
}
|