test/testshape.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 11 Nov 2017 17:21:47 -0800
changeset 11700 57a894f4028f
parent 11111 0841489fa4df
child 11811 5d94cb6b24d3
permissions -rw-r--r--
Fixed typo in comment
     1 /*
     2   Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
     3 
     4   This software is provided 'as-is', without any express or implied
     5   warranty.  In no event will the authors be held liable for any damages
     6   arising from the use of this software.
     7 
     8   Permission is granted to anyone to use this software for any purpose,
     9   including commercial applications, and to alter it and redistribute it
    10   freely.
    11 */
    12 #include <stdlib.h>
    13 #include <math.h>
    14 #include <stdio.h>
    15 #include "SDL.h"
    16 #include "SDL_shape.h"
    17 
    18 #define SHAPED_WINDOW_X 150
    19 #define SHAPED_WINDOW_Y 150
    20 #define SHAPED_WINDOW_DIMENSION 640
    21 
    22 typedef struct LoadedPicture {
    23     SDL_Surface *surface;
    24     SDL_Texture *texture;
    25     SDL_WindowShapeMode mode;
    26     const char* name;
    27 } LoadedPicture;
    28 
    29 void render(SDL_Renderer *renderer,SDL_Texture *texture,SDL_Rect texture_dimensions)
    30 {
    31     /* Clear render-target to blue. */
    32     SDL_SetRenderDrawColor(renderer,0x00,0x00,0xff,0xff);
    33     SDL_RenderClear(renderer);
    34 
    35     /* Render the texture. */
    36     SDL_RenderCopy(renderer,texture,&texture_dimensions,&texture_dimensions);
    37 
    38     SDL_RenderPresent(renderer);
    39 }
    40 
    41 int main(int argc,char** argv)
    42 {
    43     Uint8 num_pictures;
    44     LoadedPicture* pictures;
    45     int i, j;
    46     SDL_PixelFormat* format = NULL;
    47     SDL_Window *window;
    48     SDL_Renderer *renderer;
    49     SDL_Color black = {0,0,0,0xff};
    50     SDL_Event event;
    51     int should_exit = 0;
    52     unsigned int current_picture;
    53     int button_down;
    54     Uint32 pixelFormat = 0;
    55     int access = 0;
    56     SDL_Rect texture_dimensions;
    57 
    58     /* Enable standard application logging */
    59     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
    60 
    61     if(argc < 2) {
    62         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Shape requires at least one bitmap file as argument.");
    63         exit(-1);
    64     }
    65 
    66     if(SDL_VideoInit(NULL) == -1) {
    67         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not initialize SDL video.");
    68         exit(-2);
    69     }
    70 
    71     num_pictures = argc - 1;
    72     pictures = (LoadedPicture *)SDL_malloc(sizeof(LoadedPicture)*num_pictures);
    73     if (!pictures) {
    74         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not allocate memory.");
    75         exit(1);
    76     }
    77     for(i=0;i<num_pictures;i++)
    78         pictures[i].surface = NULL;
    79     for(i=0;i<num_pictures;i++) {
    80         pictures[i].surface = SDL_LoadBMP(argv[i+1]);
    81         pictures[i].name = argv[i+1];
    82         if(pictures[i].surface == NULL) {
    83             for(j=0;j<num_pictures;j++)
    84                 SDL_FreeSurface(pictures[j].surface);
    85             SDL_free(pictures);
    86             SDL_VideoQuit();
    87             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not load surface from named bitmap file: %s", argv[i+1]);
    88             exit(-3);
    89         }
    90 
    91         format = pictures[i].surface->format;
    92         if(SDL_ISPIXELFORMAT_ALPHA(format->format)) {
    93             pictures[i].mode.mode = ShapeModeBinarizeAlpha;
    94             pictures[i].mode.parameters.binarizationCutoff = 255;
    95         }
    96         else {
    97             pictures[i].mode.mode = ShapeModeColorKey;
    98             pictures[i].mode.parameters.colorKey = black;
    99         }
   100     }
   101 
   102     window = SDL_CreateShapedWindow("SDL_Shape test",
   103         SHAPED_WINDOW_X, SHAPED_WINDOW_Y,
   104         SHAPED_WINDOW_DIMENSION,SHAPED_WINDOW_DIMENSION,
   105         0);
   106     SDL_SetWindowPosition(window, SHAPED_WINDOW_X, SHAPED_WINDOW_Y);
   107     if(window == NULL) {
   108         for(i=0;i<num_pictures;i++)
   109             SDL_FreeSurface(pictures[i].surface);
   110         SDL_free(pictures);
   111         SDL_VideoQuit();
   112         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create shaped window for SDL_Shape.");
   113         exit(-4);
   114     }
   115     renderer = SDL_CreateRenderer(window,-1,0);
   116     if (!renderer) {
   117         SDL_DestroyWindow(window);
   118         for(i=0;i<num_pictures;i++)
   119             SDL_FreeSurface(pictures[i].surface);
   120         SDL_free(pictures);
   121         SDL_VideoQuit();
   122         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create rendering context for SDL_Shape window.");
   123         exit(-5);
   124     }
   125 
   126     for(i=0;i<num_pictures;i++)
   127         pictures[i].texture = NULL;
   128     for(i=0;i<num_pictures;i++) {
   129         pictures[i].texture = SDL_CreateTextureFromSurface(renderer,pictures[i].surface);
   130         if(pictures[i].texture == NULL) {
   131             for(i=0;i<num_pictures;i++)
   132                 if(pictures[i].texture != NULL)
   133                     SDL_DestroyTexture(pictures[i].texture);
   134             for(i=0;i<num_pictures;i++)
   135                 SDL_FreeSurface(pictures[i].surface);
   136             SDL_free(pictures);
   137             SDL_DestroyRenderer(renderer);
   138             SDL_DestroyWindow(window);
   139             SDL_VideoQuit();
   140             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not create texture for SDL_shape.");
   141             exit(-6);
   142         }
   143     }
   144 
   145     should_exit = 0;
   146     current_picture = 0;
   147     button_down = 0;
   148     texture_dimensions.h = 0;
   149     texture_dimensions.w = 0;
   150     texture_dimensions.x = 0;
   151     texture_dimensions.y = 0;
   152     SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
   153     SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);
   154     SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
   155     SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);
   156     while(should_exit == 0) {
   157         while (SDL_PollEvent(&event)) {
   158             if(event.type == SDL_KEYDOWN) {
   159                 button_down = 1;
   160                 if(event.key.keysym.sym == SDLK_ESCAPE) {
   161                     should_exit = 1;
   162                     break;
   163                 }
   164             }
   165             if(button_down && event.type == SDL_KEYUP) {
   166                 button_down = 0;
   167                 current_picture += 1;
   168                 if(current_picture >= num_pictures)
   169                     current_picture = 0;
   170                 SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Changing to shaped bmp: %s", pictures[current_picture].name);
   171                 SDL_QueryTexture(pictures[current_picture].texture,(Uint32 *)&pixelFormat,(int *)&access,&texture_dimensions.w,&texture_dimensions.h);
   172                 SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
   173                 SDL_SetWindowShape(window,pictures[current_picture].surface,&pictures[current_picture].mode);
   174             }
   175             if (event.type == SDL_QUIT) {
   176                 should_exit = 1;
   177                 break;
   178             }
   179         }
   180         render(renderer,pictures[current_picture].texture,texture_dimensions);
   181         SDL_Delay(10);
   182     }
   183 
   184     /* Free the textures. */
   185     for(i=0;i<num_pictures;i++)
   186         SDL_DestroyTexture(pictures[i].texture);
   187     SDL_DestroyRenderer(renderer);
   188     /* Destroy the window. */
   189     SDL_DestroyWindow(window);
   190     /* Free the original surfaces backing the textures. */
   191     for(i=0;i<num_pictures;i++)
   192         SDL_FreeSurface(pictures[i].surface);
   193     SDL_free(pictures);
   194     /* Call SDL_VideoQuit() before quitting. */
   195     SDL_VideoQuit();
   196 
   197     return 0;
   198 }
   199 
   200 /* vi: set ts=4 sw=4 expandtab: */