spine-runtimes/spine-sdl/example/main.cpp

/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated April 5, 2025. Replaces all prior versions.
 *
 * Copyright (c) 2013-2025, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
 * include this license and copyright notice.
 *
 * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
 * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 *****************************************************************************/

#include <spine-sdl-cpp.h>
#include <SDL.h>
#include <spine/Debug.h>
#undef main
spine::DebugExtension dbgExtension(spine::SpineExtension::getInstance());
extern spine::SkeletonRenderer *skeletonRenderer;

int main() {
	spine::SpineExtension::setInstance(&dbgExtension);
	{
		if (SDL_Init(SDL_INIT_VIDEO)) {
			printf("Error: %s", SDL_GetError());
			return -1;
		}
		SDL_Window *window = SDL_CreateWindow("Spine SDL", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 800, 600, 0);
		if (!window) {
			printf("Error: %s", SDL_GetError());
			return -1;
		}
		SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
		if (!renderer) {
			printf("Error: %s", SDL_GetError());
			return -1;
		}

		spine::SDLTextureLoader textureLoader(renderer);
		spine::Atlas atlas("data/spineboy-pma.atlas", &textureLoader);
		spine::AtlasAttachmentLoader attachmentLoader(&atlas);
		spine::SkeletonJson json(&attachmentLoader);
		json.setScale(0.5f);
		spine::SkeletonData *skeletonData = json.readSkeletonDataFile("data/spineboy-pro.json");
		spine::SkeletonDrawable drawable(skeletonData);
		drawable.usePremultipliedAlpha = true;
		drawable.animationState->getData()->setDefaultMix(0.2f);
		drawable.skeleton->setPosition(400, 500);
		drawable.skeleton->setToSetupPose();
		drawable.animationState->setAnimation(0, "portal", true);
		drawable.animationState->addAnimation(0, "run", true, 0);
		drawable.update(0, spine::Physics_Update);

		bool quit = false;
		uint64_t lastFrameTime = SDL_GetPerformanceCounter();
		while (!quit) {
			SDL_Event event;
			while (SDL_PollEvent(&event) != 0) {
				if (event.type == SDL_QUIT) {
					quit = true;
					break;
				}
			}

			SDL_SetRenderDrawColor(renderer, 94, 93, 96, 255);
			SDL_RenderClear(renderer);

			uint64_t now = SDL_GetPerformanceCounter();
			double deltaTime = (now - lastFrameTime) / (double) SDL_GetPerformanceFrequency();
			lastFrameTime = now;

			drawable.update(deltaTime, spine::Physics_Update);
			drawable.draw(renderer);

			SDL_RenderPresent(renderer);
		}

		SDL_DestroyWindow(window);
		SDL_Quit();
		delete skeletonData;
	}
	delete skeletonRenderer;
	dbgExtension.reportLeaks();
	return 0;
}