/* * SDL_Lesson.c * *  Created on: Aug 12, 2014 *      Author: clarck */#include <jni.h>#include "SDL.h"#include "SDL_logger.h"#include "SDL_main.h"#include "SDL_cleanup.h"//The attributes of the screenconst int SCREEN_WIDTH = 640;const int SCREEN_HEIGHT = 480;struct SDL_Window *window = NULL;struct SDL_Renderer *render = NULL;struct SDL_Texture *background = NULL;struct SDL_Texture *image = NULL;struct SDL_Surface *bmp = NULL;/* * Loads a BMP image into a texture on the rendering device * @param file The BMP image file to load * @param ren The renderer to load the texture onto * @return the loaded texture, or NULL if something went wrong. */SDL_Texture* loadTexture(const char *file, SDL_Renderer *render) {    struct SDL_Texture *texture = NULL;    //Load the image    bmp = SDL_LoadBMP(file);    if (bmp == NULL) {        LOGE("SDL_LoadBMP failed %s", SDL_GetError());    }    //If the loading went ok, convert to texture and return the texture    texture = SDL_CreateTextureFromSurface(render, bmp);    SDL_FreeSurface(bmp);    if (texture == NULL) {        LOGE("SDL_CreateTextureFromSurface failed %s", SDL_GetError());    }    return texture;}

/* * SDL_Lesson.c * *  Created on: Aug 12, 2014 *      Author: clarck */#include <jni.h>#include "SDL.h"#include "SDL_logger.h"#include "SDL_main.h"#include "SDL_cleanup.h"//The attributes of the screenconst int SCREEN_WIDTH = 640;const int SCREEN_HEIGHT = 480;struct SDL_Window *window = NULL;struct SDL_Renderer *render = NULL;struct SDL_Texture *background = NULL;struct SDL_Texture *image = NULL;struct SDL_Surface *bmp = NULL;/* * Loads a BMP image into a texture on the rendering device * @param file The BMP image file to load * @param ren The renderer to load the texture onto * @return the loaded texture, or NULL if something went wrong. */SDL_Texture* loadTexture(const char *file, SDL_Renderer *render) {    struct SDL_Texture *texture = NULL;    //Load the image    bmp = SDL_LoadBMP(file);    if (bmp == NULL) {        LOGE("SDL_LoadBMP failed %s", SDL_GetError());    }    //If the loading went ok, convert to texture and return the texture    texture = SDL_CreateTextureFromSurface(render, bmp);    SDL_FreeSurface(bmp);    if (texture == NULL) {        LOGE("SDL_CreateTextureFromSurface failed %s", SDL_GetError());    }    return texture;}/* * Draw an SDL_Texture to an SDL_Renderer at position x, y, preserving * the texture‘s width and height * @param tex The source texture we want to draw * @param ren The renderer we want to draw too * @param x The x coordinate to draw too * @param y The y coordinate to draw too */void renderTexture(SDL_Texture *tex, SDL_Renderer *ren, int x, int y) {    //Setup the destination rectangle to be at the position we want    SDL_Rect dst;    dst.x = x;    dst.y = y;    //Query the texture to get its width and height to use    SDL_QueryTexture(tex, NULL, NULL, &dst.w, &dst.h);    SDL_RenderCopy(ren, tex, NULL, &dst);}

/* * SDL_Lesson.c * *  Created on: Aug 12, 2014 *      Author: clarck */#include <jni.h>#include "SDL.h"#include "SDL_logger.h"#include "SDL_main.h"#include "SDL_cleanup.h"//The attributes of the screenconst int SCREEN_WIDTH = 640;const int SCREEN_HEIGHT = 480;struct SDL_Window *window = NULL;struct SDL_Renderer *render = NULL;struct SDL_Texture *background = NULL;struct SDL_Texture *image = NULL;struct SDL_Surface *bmp = NULL;/* * Loads a BMP image into a texture on the rendering device * @param file The BMP image file to load * @param ren The renderer to load the texture onto * @return the loaded texture, or NULL if something went wrong. */SDL_Texture* loadTexture(const char *file, SDL_Renderer *render) {    struct SDL_Texture *texture = NULL;    //Load the image    bmp = SDL_LoadBMP(file);    if (bmp == NULL) {        LOGE("SDL_LoadBMP failed %s", SDL_GetError());    }    //If the loading went ok, convert to texture and return the texture    texture = SDL_CreateTextureFromSurface(render, bmp);    SDL_FreeSurface(bmp);    if (texture == NULL) {        LOGE("SDL_CreateTextureFromSurface failed %s", SDL_GetError());    }    return texture;}/* * Draw an SDL_Texture to an SDL_Renderer at position x, y, preserving * the texture‘s width and height * @param tex The source texture we want to draw * @param ren The renderer we want to draw too * @param x The x coordinate to draw too * @param y The y coordinate to draw too */void renderTexture(SDL_Texture *tex, SDL_Renderer *ren, int x, int y) {    //Setup the destination rectangle to be at the position we want    SDL_Rect dst;    dst.x = x;    dst.y = y;    //Query the texture to get its width and height to use    SDL_QueryTexture(tex, NULL, NULL, &dst.w, &dst.h);    SDL_RenderCopy(ren, tex, NULL, &dst);}int main(int argc, char *argv[]) {    char *filefolder = argv[1];    char *background_temp = "background.bmp";    char *image_temp = "image.bmp";    LOGI("natvie_SDL %s", filefolder);    //char *background_file = "/storage/sdcard0/background.bmp";    char *background_file = (char*) malloc(            strlen(filefolder) + strlen(background_temp) + 1);    strcpy(background_file, filefolder);    strcat(background_file, background_temp);    //char *image_file = "/storage/sdcard0/image.bmp";    char *image_file = (char*) malloc(            strlen(filefolder) + strlen(image_temp) + 1);    strcpy(image_file, filefolder);    strcat(image_file, image_temp);    if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {        LOGE("SDL_Init failed %s", SDL_GetError());    }    window = SDL_CreateWindow("lesson2", 100, 100, SCREEN_WIDTH, SCREEN_HEIGHT,            SDL_WINDOW_SHOWN);    if (window == NULL) {        LOGE("SDL_CreateWindow failed %s", SDL_GetError());    }    render = SDL_CreateRenderer(window, -1,            SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);    if (render == NULL) {        LOGE("SDL_CreateRenderer failed %s", SDL_GetError());    }    background = loadTexture(background_file, render);    image = loadTexture(image_file, render);    //Clear the window    SDL_RenderClear(render);    //Get the width and height from the texture so we know how much to move x,y by    //to tile it correctly    int bW, bH;    SDL_QueryTexture(background, NULL, NULL, &bW, &bH);    //We want to tile our background so draw it 4 times    renderTexture(background, render, 0, 0);    renderTexture(background, render, bW, 0);    renderTexture(background, render, 0, bH);    renderTexture(background, render, bW, bH);    //Draw our image in the center of the window    //We need the foreground image‘s width to properly compute the position    //of it‘s top left corner so that the image will be centered    int iW, iH;    SDL_QueryTexture(image, NULL, NULL, &iW, &iH);    int x = SCREEN_WIDTH / 2 - iW / 2;    int y = SCREEN_HEIGHT / 2 - iH / 2;    renderTexture(image, render, x, y);    //Update the screen    SDL_RenderPresent(render);    SDL_Delay(2000);    cleanup_texture(background);    cleanup_texture(image);    cleanup_render(render);    cleanup_window(window);    SDL_Quit();    return 0;}

/**    Simple nativeInit() runnable*/class SDLMain implements Runnable {    @Override    public void run() {        // Runs SDL_main()        String sdcard = Environment.getExternalStorageDirectory().getAbsolutePath();        SDLActivity.nativeInit(sdcard);        //Log.v("SDL", "SDL thread terminated");    }}