testdraw2.c
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/*
Copyright (C) 1997-2016 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: */
state
static SDLTest_CommonState * state
Definition: testdraw2.c:27
SDL_RenderDrawPoint
#define SDL_RenderDrawPoint
Definition: SDL_dynapi_overrides.h:341
NUM_OBJECTS
#define NUM_OBJECTS
Definition: testdraw2.c:25
SDL_PollEvent
#define SDL_PollEvent
Definition: SDL_dynapi_overrides.h:128
x1
GLuint GLfloat GLfloat GLfloat x1
Definition: SDL_opengl_glext.h:8583
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:157
SDL_BLENDMODE_NONE
Definition: SDL_blendmode.h:42
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
SDL_BlendMode
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
Definition: SDL_blendmode.h:40
SDLTest_CommonCreateState
SDLTest_CommonState * SDLTest_CommonCreateState(char **argv, Uint32 flags)
Parse command line parameters and create common state.
Definition: SDL_test_common.c:36
rect
SDL_Rect rect
Definition: testrelative.c:27
SDL_RenderFillRect
#define SDL_RenderFillRect
Definition: SDL_dynapi_overrides.h:347
y2
GLfixed GLfixed GLfixed y2
Definition: SDL_opengl_glext.h:4583
SDLTest_CommonArg
int SDLTest_CommonArg(SDLTest_CommonState *state, int index)
Process one common argument.
Definition: SDL_test_common.c:83
SDL_SetRenderDrawBlendMode
#define SDL_SetRenderDrawBlendMode
Definition: SDL_dynapi_overrides.h:338
SDL_Renderer
Definition: SDL_sysrender.h:76
SDL_strcasecmp
#define SDL_strcasecmp
Definition: SDL_dynapi_overrides.h:425
SDL_test_common.h
loop
void loop()
Definition: testdraw2.c:179
SDLTest_CommonInit
SDL_bool SDLTest_CommonInit(SDLTest_CommonState *state)
Open test window.
Definition: SDL_test_common.c:645
x2
GLfixed GLfixed x2
Definition: SDL_opengl_glext.h:4583
cycle_color
static SDL_bool cycle_color
Definition: testdraw2.c:29
SDL_BLENDMODE_MOD
Definition: SDL_blendmode.h:50
SDLTest_CommonState::windows
SDL_Window ** windows
Definition: SDL_test_common.h:78
y1
GLfixed y1
Definition: SDL_opengl_glext.h:4583
current_alpha
static int current_alpha
Definition: testdraw2.c:32
blendMode
static SDL_BlendMode blendMode
Definition: testdraw2.c:34
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:126
SDLTest_CommonState::num_windows
int num_windows
Definition: SDL_test_common.h:77
renderer
SDL_Renderer * renderer
Definition: testautomation_render.c:27
SDL_Log
#define SDL_Log
Definition: SDL_dynapi_overrides.h:37
SDLTest_CommonEvent
void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done)
Common event handler for test windows.
Definition: SDL_test_common.c:1295
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
num_objects
static int num_objects
Definition: testdraw2.c:28
SDL_isdigit
#define SDL_isdigit
Definition: SDL_dynapi_overrides.h:388
SDL_GetTicks
Uint32 SDL_GetTicks(void)
Get the number of milliseconds since the SDL library initialization.
current_color
static int current_color
Definition: testdraw2.c:33
Uint8
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:139
event
struct _cl_event * event
Definition: SDL_opengl_glext.h:2649
DrawLines
void DrawLines(SDL_Renderer *renderer)
Definition: testdraw2.c:82
SDL_RenderGetViewport
#define SDL_RenderGetViewport
Definition: SDL_dynapi_overrides.h:331
done
int done
Definition: testdraw2.c:36
SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
SDL_Rect::x
int x
Definition: SDL_rect.h:66
SDL_TRUE
Definition: SDL_stdinc.h:129
SDLTest_CommonUsage
const char * SDLTest_CommonUsage(SDLTest_CommonState *state)
Returns common usage information.
Definition: SDL_test_common.c:451
main
int main(int argc, char *argv[])
Definition: testdraw2.c:209
SDL_Rect::w
int w
Definition: SDL_rect.h:67
SDL_atoi
#define SDL_atoi
Definition: SDL_dynapi_overrides.h:416
SDLTest_CommonState
Definition: SDL_test_common.h:51
SDLTest_CommonState::renderers
SDL_Renderer ** renderers
Definition: SDL_test_common.h:84
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
SDL_LogSetPriority
#define SDL_LogSetPriority
Definition: SDL_dynapi_overrides.h:242
NULL
#define NULL
Definition: begin_code.h:143
cycle_alpha
static SDL_bool cycle_alpha
Definition: testdraw2.c:30
SDL_RenderClear
#define SDL_RenderClear
Definition: SDL_dynapi_overrides.h:340
DrawPoints
void DrawPoints(SDL_Renderer *renderer)
Definition: testdraw2.c:39
SDL_Rect::h
int h
Definition: SDL_rect.h:67
SDL_BLENDMODE_ADD
Definition: SDL_blendmode.h:47
viewport
SDL_Rect viewport
Definition: testviewport.c:28
SDL_Event
General event structure.
Definition: SDL_events.h:521
SDL_SetRenderDrawColor
#define SDL_SetRenderDrawColor
Definition: SDL_dynapi_overrides.h:336
DrawRects
void DrawRects(SDL_Renderer *renderer)
Definition: testdraw2.c:134
cycle_direction
static int cycle_direction
Definition: testdraw2.c:31
SDL_RenderDrawLine
#define SDL_RenderDrawLine
Definition: SDL_dynapi_overrides.h:343
SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
SDL_Rect::y
int y
Definition: SDL_rect.h:66
SDLTest_CommonQuit
void SDLTest_CommonQuit(SDLTest_CommonState *state)
Close test window.
Definition: SDL_test_common.c:1560
SDL_INIT_VIDEO
#define SDL_INIT_VIDEO
Definition: SDL.h:77
SDL_Rect
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
SDL_RenderPresent
#define SDL_RenderPresent
Definition: SDL_dynapi_overrides.h:352
SDL_BLENDMODE_BLEND
Definition: SDL_blendmode.h:44