browser/external/raylib-4.5.0/examples/textures/textures_gif_player.c

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2023-09-27 15:02:24 -04:00
/*******************************************************************************************
*
* raylib [textures] example - gif playing
*
* Example originally created with raylib 4.2, last time updated with raylib 4.2
*
* 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) 2021-2023 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#define MAX_FRAME_DELAY 20
#define MIN_FRAME_DELAY 1
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] example - gif playing");
int animFrames = 0;
// Load all GIF animation frames into a single Image
// NOTE: GIF data is always loaded as RGBA (32bit) by default
// NOTE: Frames are just appended one after another in image.data memory
Image imScarfyAnim = LoadImageAnim("resources/scarfy_run.gif", &animFrames);
// Load texture from image
// NOTE: We will update this texture when required with next frame data
// WARNING: It's not recommended to use this technique for sprites animation,
// use spritesheets instead, like illustrated in textures_sprite_anim example
Texture2D texScarfyAnim = LoadTextureFromImage(imScarfyAnim);
unsigned int nextFrameDataOffset = 0; // Current byte offset to next frame in image.data
int currentAnimFrame = 0; // Current animation frame to load and draw
int frameDelay = 8; // Frame delay to switch between animation frames
int frameCounter = 0; // General frames counter
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
frameCounter++;
if (frameCounter >= frameDelay)
{
// Move to next frame
// NOTE: If final frame is reached we return to first frame
currentAnimFrame++;
if (currentAnimFrame >= animFrames) currentAnimFrame = 0;
// Get memory offset position for next frame data in image.data
nextFrameDataOffset = imScarfyAnim.width*imScarfyAnim.height*4*currentAnimFrame;
// Update GPU texture data with next frame image data
// WARNING: Data size (frame size) and pixel format must match already created texture
UpdateTexture(texScarfyAnim, ((unsigned char *)imScarfyAnim.data) + nextFrameDataOffset);
frameCounter = 0;
}
// Control frames delay
if (IsKeyPressed(KEY_RIGHT)) frameDelay++;
else if (IsKeyPressed(KEY_LEFT)) frameDelay--;
if (frameDelay > MAX_FRAME_DELAY) frameDelay = MAX_FRAME_DELAY;
else if (frameDelay < MIN_FRAME_DELAY) frameDelay = MIN_FRAME_DELAY;
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
DrawText(TextFormat("TOTAL GIF FRAMES: %02i", animFrames), 50, 30, 20, LIGHTGRAY);
DrawText(TextFormat("CURRENT FRAME: %02i", currentAnimFrame), 50, 60, 20, GRAY);
DrawText(TextFormat("CURRENT FRAME IMAGE.DATA OFFSET: %02i", nextFrameDataOffset), 50, 90, 20, GRAY);
DrawText("FRAMES DELAY: ", 100, 305, 10, DARKGRAY);
DrawText(TextFormat("%02i frames", frameDelay), 620, 305, 10, DARKGRAY);
DrawText("PRESS RIGHT/LEFT KEYS to CHANGE SPEED!", 290, 350, 10, DARKGRAY);
for (int i = 0; i < MAX_FRAME_DELAY; i++)
{
if (i < frameDelay) DrawRectangle(190 + 21*i, 300, 20, 20, RED);
DrawRectangleLines(190 + 21*i, 300, 20, 20, MAROON);
}
DrawTexture(texScarfyAnim, GetScreenWidth()/2 - texScarfyAnim.width/2, 140, WHITE);
DrawText("(c) Scarfy sprite by Eiden Marsal", screenWidth - 200, screenHeight - 20, 10, GRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(texScarfyAnim); // Unload texture
UnloadImage(imScarfyAnim); // Unload image (contains all frames)
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}