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the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here.
Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here. Not 5 or 10 depending on the architecture. More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802
This commit is contained in:
Edward Rudd
184
test/teststreaming.c
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184
test/teststreaming.c
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/*
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/********************************************************************************
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* *
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* Running moose :) Coded by Mike Gorchak. *
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* *
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********************************************************************************/
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef __EMSCRIPTEN__
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#include <emscripten/emscripten.h>
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#endif
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#include "SDL.h"
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#define MOOSEPIC_W 64
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#define MOOSEPIC_H 88
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#define MOOSEFRAME_SIZE (MOOSEPIC_W * MOOSEPIC_H)
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#define MOOSEFRAMES_COUNT 10
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SDL_Color MooseColors[84] = {
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{49, 49, 49, 255}, {66, 24, 0, 255}, {66, 33, 0, 255}, {66, 66, 66, 255},
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{66, 115, 49, 255}, {74, 33, 0, 255}, {74, 41, 16, 255}, {82, 33, 8, 255},
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{82, 41, 8, 255}, {82, 49, 16, 255}, {82, 82, 82, 255}, {90, 41, 8, 255},
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{90, 41, 16, 255}, {90, 57, 24, 255}, {99, 49, 16, 255}, {99, 66, 24, 255},
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{99, 66, 33, 255}, {99, 74, 33, 255}, {107, 57, 24, 255}, {107, 82, 41, 255},
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{115, 57, 33, 255}, {115, 66, 33, 255}, {115, 66, 41, 255}, {115, 74, 0, 255},
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{115, 90, 49, 255}, {115, 115, 115, 255}, {123, 82, 0, 255}, {123, 99, 57, 255},
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{132, 66, 41, 255}, {132, 74, 41, 255}, {132, 90, 8, 255}, {132, 99, 33, 255},
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{132, 99, 66, 255}, {132, 107, 66, 255}, {140, 74, 49, 255}, {140, 99, 16, 255},
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{140, 107, 74, 255}, {140, 115, 74, 255}, {148, 107, 24, 255}, {148, 115, 82, 255},
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{148, 123, 74, 255}, {148, 123, 90, 255}, {156, 115, 33, 255}, {156, 115, 90, 255},
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{156, 123, 82, 255}, {156, 132, 82, 255}, {156, 132, 99, 255}, {156, 156, 156, 255},
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{165, 123, 49, 255}, {165, 123, 90, 255}, {165, 132, 82, 255}, {165, 132, 90, 255},
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{165, 132, 99, 255}, {165, 140, 90, 255}, {173, 132, 57, 255}, {173, 132, 99, 255},
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{173, 140, 107, 255}, {173, 140, 115, 255}, {173, 148, 99, 255}, {173, 173, 173, 255},
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{181, 140, 74, 255}, {181, 148, 115, 255}, {181, 148, 123, 255}, {181, 156, 107, 255},
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{189, 148, 123, 255}, {189, 156, 82, 255}, {189, 156, 123, 255}, {189, 156, 132, 255},
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{189, 189, 189, 255}, {198, 156, 123, 255}, {198, 165, 132, 255}, {206, 165, 99, 255},
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{206, 165, 132, 255}, {206, 173, 140, 255}, {206, 206, 206, 255}, {214, 173, 115, 255},
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{214, 173, 140, 255}, {222, 181, 148, 255}, {222, 189, 132, 255}, {222, 189, 156, 255},
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{222, 222, 222, 255}, {231, 198, 165, 255}, {231, 231, 231, 255}, {239, 206, 173, 255}
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};
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Uint8 MooseFrames[MOOSEFRAMES_COUNT][MOOSEFRAME_SIZE];
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SDL_Renderer *renderer;
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int frame;
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SDL_Texture *MooseTexture;
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SDL_bool done = SDL_FALSE;
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void quit(int rc)
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{
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SDL_Quit();
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exit(rc);
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}
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void UpdateTexture(SDL_Texture *texture, int frame)
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{
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SDL_Color *color;
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Uint8 *src;
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Uint32 *dst;
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int row, col;
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void *pixels;
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int pitch;
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if (SDL_LockTexture(texture, NULL, &pixels, &pitch) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't lock texture: %s\n", SDL_GetError());
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quit(5);
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}
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src = MooseFrames[frame];
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for (row = 0; row < MOOSEPIC_H; ++row) {
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dst = (Uint32*)((Uint8*)pixels + row * pitch);
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for (col = 0; col < MOOSEPIC_W; ++col) {
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color = &MooseColors[*src++];
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*dst++ = (0xFF000000|(color->r<<16)|(color->g<<8)|color->b);
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}
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}
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SDL_UnlockTexture(texture);
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}
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void
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loop()
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{
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SDL_Event event;
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_KEYDOWN:
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if (event.key.keysym.sym == SDLK_ESCAPE) {
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done = SDL_TRUE;
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}
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break;
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case SDL_QUIT:
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done = SDL_TRUE;
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break;
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}
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}
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frame = (frame + 1) % MOOSEFRAMES_COUNT;
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UpdateTexture(MooseTexture, frame);
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SDL_RenderClear(renderer);
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SDL_RenderCopy(renderer, MooseTexture, NULL, NULL);
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SDL_RenderPresent(renderer);
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}
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int
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main(int argc, char **argv)
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{
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SDL_Window *window;
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SDL_RWops *handle;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return 1;
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}
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/* load the moose images */
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handle = SDL_RWFromFile("moose.dat", "rb");
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if (handle == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Can't find the file moose.dat !\n");
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quit(2);
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}
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SDL_RWread(handle, MooseFrames, MOOSEFRAME_SIZE, MOOSEFRAMES_COUNT);
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SDL_RWclose(handle);
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/* Create the window and renderer */
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window = SDL_CreateWindow("Happy Moose",
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SDL_WINDOWPOS_UNDEFINED,
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SDL_WINDOWPOS_UNDEFINED,
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MOOSEPIC_W*4, MOOSEPIC_H*4,
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SDL_WINDOW_RESIZABLE);
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if (!window) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set create window: %s\n", SDL_GetError());
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quit(3);
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}
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renderer = SDL_CreateRenderer(window, -1, 0);
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if (!renderer) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set create renderer: %s\n", SDL_GetError());
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quit(4);
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}
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MooseTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, MOOSEPIC_W, MOOSEPIC_H);
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if (!MooseTexture) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set create texture: %s\n", SDL_GetError());
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quit(5);
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}
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/* Loop, waiting for QUIT or the escape key */
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frame = 0;
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#ifdef __EMSCRIPTEN__
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emscripten_set_main_loop(loop, 0, 1);
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#else
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while (!done) {
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loop();
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}
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#endif
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SDL_DestroyRenderer(renderer);
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quit(0);
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return 0;
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}
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/* vi: set ts=4 sw=4 expandtab: */
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