200 lines
6.9 KiB
C
Executable file
200 lines
6.9 KiB
C
Executable file
/*
|
|
Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
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;
|
|
const char* name;
|
|
} 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 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);
|
|
if (!pictures) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not allocate memory.");
|
|
exit(1);
|
|
}
|
|
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]);
|
|
pictures[i].name = argv[i+1];
|
|
if(pictures[i].surface == NULL) {
|
|
for(j=0;j<num_pictures;j++)
|
|
SDL_FreeSurface(pictures[j].surface);
|
|
SDL_free(pictures);
|
|
SDL_VideoQuit();
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not load surface from named bitmap file: %s", argv[i+1]);
|
|
exit(-3);
|
|
}
|
|
|
|
format = pictures[i].surface->format;
|
|
if(SDL_ISPIXELFORMAT_ALPHA(format->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) {
|
|
for(i=0;i<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);
|
|
}
|
|
}
|
|
|
|
should_exit = 0;
|
|
current_picture = 0;
|
|
button_down = 0;
|
|
texture_dimensions.h = 0;
|
|
texture_dimensions.w = 0;
|
|
texture_dimensions.x = 0;
|
|
texture_dimensions.y = 0;
|
|
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
|
|
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) {
|
|
while (SDL_PollEvent(&event)) {
|
|
if(event.type == SDL_KEYDOWN) {
|
|
button_down = 1;
|
|
if(event.key.keysym.sym == SDLK_ESCAPE) {
|
|
should_exit = 1;
|
|
break;
|
|
}
|
|
}
|
|
if(button_down && event.type == SDL_KEYUP) {
|
|
button_down = 0;
|
|
current_picture += 1;
|
|
if(current_picture >= num_pictures)
|
|
current_picture = 0;
|
|
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
|
|
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;
|
|
break;
|
|
}
|
|
}
|
|
render(renderer,pictures[current_picture].texture,texture_dimensions);
|
|
SDL_Delay(10);
|
|
}
|
|
|
|
/* 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: */
|