mirror of
https://github.com/libsdl-org/SDL.git
synced 2024-11-23 19:03:27 +08:00
306 lines
8.9 KiB
C
306 lines
8.9 KiB
C
/*
|
|
Copyright (C) 1997-2019 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.
|
|
*/
|
|
|
|
/* Simple program: draw as many random objects on the screen as possible */
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
#include "SDL_test_common.h"
|
|
|
|
#define NUM_OBJECTS 100
|
|
|
|
static SDLTest_CommonState *state;
|
|
static int num_objects;
|
|
static SDL_bool cycle_color;
|
|
static SDL_bool cycle_alpha;
|
|
static int cycle_direction = 1;
|
|
static int current_alpha = 255;
|
|
static int current_color = 255;
|
|
static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE;
|
|
|
|
int done;
|
|
|
|
void
|
|
DrawPoints(SDL_Renderer * renderer)
|
|
{
|
|
int i;
|
|
int x, y;
|
|
SDL_Rect viewport;
|
|
|
|
/* Query the sizes */
|
|
SDL_RenderGetViewport(renderer, &viewport);
|
|
|
|
for (i = 0; i < num_objects * 4; ++i) {
|
|
/* Cycle the color and alpha, if desired */
|
|
if (cycle_color) {
|
|
current_color += cycle_direction;
|
|
if (current_color < 0) {
|
|
current_color = 0;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
if (current_color > 255) {
|
|
current_color = 255;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
}
|
|
if (cycle_alpha) {
|
|
current_alpha += cycle_direction;
|
|
if (current_alpha < 0) {
|
|
current_alpha = 0;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
if (current_alpha > 255) {
|
|
current_alpha = 255;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
}
|
|
SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
|
|
(Uint8) current_color, (Uint8) current_alpha);
|
|
|
|
x = rand() % viewport.w;
|
|
y = rand() % viewport.h;
|
|
SDL_RenderDrawPoint(renderer, x, y);
|
|
}
|
|
}
|
|
|
|
void
|
|
DrawLines(SDL_Renderer * renderer)
|
|
{
|
|
int i;
|
|
int x1, y1, x2, y2;
|
|
SDL_Rect viewport;
|
|
|
|
/* Query the sizes */
|
|
SDL_RenderGetViewport(renderer, &viewport);
|
|
|
|
for (i = 0; i < num_objects; ++i) {
|
|
/* Cycle the color and alpha, if desired */
|
|
if (cycle_color) {
|
|
current_color += cycle_direction;
|
|
if (current_color < 0) {
|
|
current_color = 0;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
if (current_color > 255) {
|
|
current_color = 255;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
}
|
|
if (cycle_alpha) {
|
|
current_alpha += cycle_direction;
|
|
if (current_alpha < 0) {
|
|
current_alpha = 0;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
if (current_alpha > 255) {
|
|
current_alpha = 255;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
}
|
|
SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
|
|
(Uint8) current_color, (Uint8) current_alpha);
|
|
|
|
if (i == 0) {
|
|
SDL_RenderDrawLine(renderer, 0, 0, viewport.w - 1, viewport.h - 1);
|
|
SDL_RenderDrawLine(renderer, 0, viewport.h - 1, viewport.w - 1, 0);
|
|
SDL_RenderDrawLine(renderer, 0, viewport.h / 2, viewport.w - 1, viewport.h / 2);
|
|
SDL_RenderDrawLine(renderer, viewport.w / 2, 0, viewport.w / 2, viewport.h - 1);
|
|
} else {
|
|
x1 = (rand() % (viewport.w*2)) - viewport.w;
|
|
x2 = (rand() % (viewport.w*2)) - viewport.w;
|
|
y1 = (rand() % (viewport.h*2)) - viewport.h;
|
|
y2 = (rand() % (viewport.h*2)) - viewport.h;
|
|
SDL_RenderDrawLine(renderer, x1, y1, x2, y2);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
DrawRects(SDL_Renderer * renderer)
|
|
{
|
|
int i;
|
|
SDL_Rect rect;
|
|
SDL_Rect viewport;
|
|
|
|
/* Query the sizes */
|
|
SDL_RenderGetViewport(renderer, &viewport);
|
|
|
|
for (i = 0; i < num_objects / 4; ++i) {
|
|
/* Cycle the color and alpha, if desired */
|
|
if (cycle_color) {
|
|
current_color += cycle_direction;
|
|
if (current_color < 0) {
|
|
current_color = 0;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
if (current_color > 255) {
|
|
current_color = 255;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
}
|
|
if (cycle_alpha) {
|
|
current_alpha += cycle_direction;
|
|
if (current_alpha < 0) {
|
|
current_alpha = 0;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
if (current_alpha > 255) {
|
|
current_alpha = 255;
|
|
cycle_direction = -cycle_direction;
|
|
}
|
|
}
|
|
SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
|
|
(Uint8) current_color, (Uint8) current_alpha);
|
|
|
|
rect.w = rand() % (viewport.h / 2);
|
|
rect.h = rand() % (viewport.h / 2);
|
|
rect.x = (rand() % (viewport.w*2) - viewport.w) - (rect.w / 2);
|
|
rect.y = (rand() % (viewport.h*2) - viewport.h) - (rect.h / 2);
|
|
SDL_RenderFillRect(renderer, &rect);
|
|
}
|
|
}
|
|
|
|
void
|
|
loop()
|
|
{
|
|
int i;
|
|
SDL_Event event;
|
|
|
|
/* Check for events */
|
|
while (SDL_PollEvent(&event)) {
|
|
SDLTest_CommonEvent(state, &event, &done);
|
|
}
|
|
for (i = 0; i < state->num_windows; ++i) {
|
|
SDL_Renderer *renderer = state->renderers[i];
|
|
if (state->windows[i] == NULL)
|
|
continue;
|
|
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
|
|
DrawRects(renderer);
|
|
DrawLines(renderer);
|
|
DrawPoints(renderer);
|
|
|
|
SDL_RenderPresent(renderer);
|
|
}
|
|
#ifdef __EMSCRIPTEN__
|
|
if (done) {
|
|
emscripten_cancel_main_loop();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int i;
|
|
Uint32 then, now, frames;
|
|
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
/* Initialize parameters */
|
|
num_objects = NUM_OBJECTS;
|
|
|
|
/* Initialize test framework */
|
|
state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
|
|
if (!state) {
|
|
return 1;
|
|
}
|
|
for (i = 1; i < argc;) {
|
|
int consumed;
|
|
|
|
consumed = SDLTest_CommonArg(state, i);
|
|
if (consumed == 0) {
|
|
consumed = -1;
|
|
if (SDL_strcasecmp(argv[i], "--blend") == 0) {
|
|
if (argv[i + 1]) {
|
|
if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
|
|
blendMode = SDL_BLENDMODE_NONE;
|
|
consumed = 2;
|
|
} else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
|
|
blendMode = SDL_BLENDMODE_BLEND;
|
|
consumed = 2;
|
|
} else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
|
|
blendMode = SDL_BLENDMODE_ADD;
|
|
consumed = 2;
|
|
} else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
|
|
blendMode = SDL_BLENDMODE_MOD;
|
|
consumed = 2;
|
|
}
|
|
}
|
|
} else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
|
|
cycle_color = SDL_TRUE;
|
|
consumed = 1;
|
|
} else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
|
|
cycle_alpha = SDL_TRUE;
|
|
consumed = 1;
|
|
} else if (SDL_isdigit(*argv[i])) {
|
|
num_objects = SDL_atoi(argv[i]);
|
|
consumed = 1;
|
|
}
|
|
}
|
|
if (consumed < 0) {
|
|
SDL_Log("Usage: %s %s [--blend none|blend|add|mod] [--cyclecolor] [--cyclealpha]\n",
|
|
argv[0], SDLTest_CommonUsage(state));
|
|
return 1;
|
|
}
|
|
i += consumed;
|
|
}
|
|
if (!SDLTest_CommonInit(state)) {
|
|
return 2;
|
|
}
|
|
|
|
/* Create the windows and initialize the renderers */
|
|
for (i = 0; i < state->num_windows; ++i) {
|
|
SDL_Renderer *renderer = state->renderers[i];
|
|
SDL_SetRenderDrawBlendMode(renderer, blendMode);
|
|
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
}
|
|
|
|
srand((unsigned int)time(NULL));
|
|
|
|
/* Main render loop */
|
|
frames = 0;
|
|
then = SDL_GetTicks();
|
|
done = 0;
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop(loop, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
++frames;
|
|
loop();
|
|
}
|
|
#endif
|
|
|
|
|
|
SDLTest_CommonQuit(state);
|
|
|
|
/* Print out some timing information */
|
|
now = SDL_GetTicks();
|
|
if (now > then) {
|
|
double fps = ((double) frames * 1000) / (now - then);
|
|
SDL_Log("%2.2f frames per second\n", fps);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|