This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely.

*/

#include <stdlib.h>

#include <math.h>

#include <stdio.h>

#include "SDL.h"

#include "SDL_shape.h"

#define SHAPED_WINDOW_X 150

#define SHAPED_WINDOW_Y 150

#define SHAPED_WINDOW_DIMENSION 640

typedef struct LoadedPicture {

SDL_Surface *surface;

SDL_Texture *texture;

SDL_WindowShapeMode mode;

} LoadedPicture;

void render(SDL_Renderer *renderer,SDL_Texture *texture,SDL_Rect texture_dimensions)

{

/* Clear render-target to blue. */

SDL_SetRenderDrawColor(renderer,0x00,0x00,0xff,0xff);

SDL_RenderClear(renderer);

/* Render the texture. */

SDL_RenderCopy(renderer,texture,&texture_dimensions,&texture_dimensions);

SDL_RenderPresent(renderer);

}

int main(int argc,char** argv)

{

Uint8 num_pictures;

LoadedPicture* pictures;

int i, j;

SDL_PixelFormat* format = NULL;

SDL_Window *window;

SDL_Renderer *renderer;

SDL_Color black = {0,0,0,0xff};

SDL_Event event;

int event_pending = 0;

int should_exit = 0;

unsigned int current_picture;

int button_down;

Uint32 pixelFormat = 0;

int access = 0;

SDL_Rect texture_dimensions;;

/* Enable standard application logging */

SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

if(argc < 2) {

SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Shape requires at least one bitmap file as argument.");

exit(-1);

}

if(SDL_VideoInit(NULL) == -1) {

SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not initialize SDL video.");

exit(-2);

}

num_pictures = argc - 1;

pictures = (LoadedPicture *)SDL_malloc(sizeof(LoadedPicture)*num_pictures);

for(i=0;i<num_pictures;i++)

pictures[i].surface = NULL;

for(i=0;i<num_pictures;i++) {

pictures[i].surface = SDL_LoadBMP(argv[i+1]);

if(pictures[i].surface == NULL) {

j = 0;

for(j=0;j<num_pictures;j++)

SDL_FreeSurface(pictures[j].surface);

SDL_free(pictures);

SDL_VideoQuit();

exit(-3);

}

format = pictures[i].surface->format;

pictures[i].mode.mode = ShapeModeBinarizeAlpha;

pictures[i].mode.parameters.binarizationCutoff = 255;

}

else {

pictures[i].mode.mode = ShapeModeColorKey;

pictures[i].mode.parameters.colorKey = black;

}

}

window = SDL_CreateShapedWindow("SDL_Shape test",

SHAPED_WINDOW_X, SHAPED_WINDOW_Y,

SHAPED_WINDOW_DIMENSION,SHAPED_WINDOW_DIMENSION,

0);

SDL_SetWindowPosition(window, SHAPED_WINDOW_X, SHAPED_WINDOW_Y);

if(window == NULL) {

for(i=0;i<num_pictures;i++)

SDL_FreeSurface(pictures[i].surface);

SDL_free(pictures);

SDL_VideoQuit();

SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create shaped window for SDL_Shape.");

exit(-4);

}

renderer = SDL_CreateRenderer(window,-1,0);

if (!renderer) {

SDL_DestroyWindow(window);

for(i=0;i<num_pictures;i++)

SDL_FreeSurface(pictures[i].surface);

SDL_free(pictures);

SDL_VideoQuit();

SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create rendering context for SDL_Shape window.");

exit(-5);

}

for(i=0;i<num_pictures;i++)

pictures[i].texture = NULL;

for(i=0;i<num_pictures;i++) {

pictures[i].texture = SDL_CreateTextureFromSurface(renderer,pictures[i].surface);

if(pictures[i].texture == NULL) {

j = 0;

for(j=0;j<num_pictures;i++)

if(pictures[i].texture != NULL)

SDL_DestroyTexture(pictures[i].texture);

for(i=0;i<num_pictures;i++)

SDL_FreeSurface(pictures[i].surface);

SDL_free(pictures);

SDL_DestroyRenderer(renderer);

SDL_DestroyWindow(window);

SDL_VideoQuit();

SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create texture for SDL_shape.");

exit(-6);

}

}

event_pending = 0;

should_exit = 0;

event_pending = SDL_PollEvent(&event);

current_picture = 0;

button_down = 0;

texture_dimensions.h = 0;

texture_dimensions.w = 0;

texture_dimensions.x = 0;

texture_dimensions.y = 0;

SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);

SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);

SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);

while(should_exit == 0) {

event_pending = SDL_PollEvent(&event);

if(event_pending == 1) {

if(event.type == SDL_KEYDOWN) {

button_down = 1;

break;

}

}

if(button_down && event.type == SDL_KEYUP) {

button_down = 0;

current_picture += 1;

if(current_picture >= num_pictures)

current_picture = 0;

SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);

SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);

SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);

}

if(event.type == SDL_QUIT)

should_exit = 1;

event_pending = 0;

}

render(renderer,pictures[current_picture].texture,texture_dimensions);

}

/* Free the textures. */

for(i=0;i<num_pictures;i++)

SDL_DestroyTexture(pictures[i].texture);

SDL_DestroyRenderer(renderer);

/* Destroy the window. */

SDL_DestroyWindow(window);

/* Free the original surfaces backing the textures. */

for(i=0;i<num_pictures;i++)

SDL_FreeSurface(pictures[i].surface);

SDL_free(pictures);

/* Call SDL_VideoQuit() before quitting. */

SDL_VideoQuit();

return 0;

}

/* vi: set ts=4 sw=4 expandtab: */