SDL  2.0
Macros | Functions | Variables
testsprite2.c File Reference
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "SDL_test.h"
#include "SDL_test_common.h"
+ Include dependency graph for testsprite2.c:

Go to the source code of this file.

Macros

#define NUM_SPRITES   100
#define MAX_SPEED   1

Functions

static void quit (int rc)
int LoadSprite (const char *file)
void MoveSprites (SDL_Renderer *renderer, SDL_Texture *sprite)
void loop ()
int main (int argc, char *argv[])

Variables

static SDLTest_CommonState * state
static int num_sprites
static SDL_Texture ** sprites
static SDL_bool cycle_color
static SDL_bool cycle_alpha
static int cycle_direction = 1
static int current_alpha = 0
static int current_color = 0
static SDL_Rect * positions
static SDL_Rect * velocities
static int sprite_w
static int sprite_h
static SDL_BlendMode blendMode = SDL_BLENDMODE_BLEND
static int iterations = -1
int done

Macro Definition Documentation

#define MAX_SPEED   1

Definition at line 26 of file testsprite2.c.

Referenced by main().

#define NUM_SPRITES   100

Definition at line 25 of file testsprite2.c.

Referenced by main().

Function Documentation

int LoadSprite ( const char *  file)

Definition at line 59 of file testsprite2.c.

References SDL_PixelFormat::BitsPerPixel, blendMode, SDL_Surface::format, SDL_Surface::h, i, NULL, SDLTest_CommonState::num_windows, SDL_PixelFormat::palette, SDL_Surface::pixels, renderer, SDLTest_CommonState::renderers, SDL_CreateTextureFromSurface, SDL_DestroyTexture, SDL_FreeSurface, SDL_GetError, SDL_LoadBMP, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_SetColorKey, SDL_SetTextureBlendMode, sprite_h, sprite_w, and SDL_Surface::w.

{
int i;
SDL_Surface *temp;
/* Load the sprite image */
temp = SDL_LoadBMP(file);
if (temp == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
return (-1);
}
sprite_w = temp->w;
sprite_h = temp->h;
/* Set transparent pixel as the pixel at (0,0) */
if (temp->format->palette) {
SDL_SetColorKey(temp, 1, *(Uint8 *) temp->pixels);
} else {
switch (temp->format->BitsPerPixel) {
case 15:
SDL_SetColorKey(temp, 1, (*(Uint16 *) temp->pixels) & 0x00007FFF);
break;
case 16:
SDL_SetColorKey(temp, 1, *(Uint16 *) temp->pixels);
break;
case 24:
SDL_SetColorKey(temp, 1, (*(Uint32 *) temp->pixels) & 0x00FFFFFF);
break;
case 32:
SDL_SetColorKey(temp, 1, *(Uint32 *) temp->pixels);
break;
}
}
/* Create textures from the image */
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
sprites[i] = SDL_CreateTextureFromSurface(renderer, temp);
if (!sprites[i]) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
SDL_FreeSurface(temp);
return (-1);
}
if (SDL_SetTextureBlendMode(sprites[i], blendMode) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set blend mode: %s\n", SDL_GetError());
SDL_FreeSurface(temp);
SDL_DestroyTexture(sprites[i]);
return (-1);
}
}
SDL_FreeSurface(temp);
/* We're ready to roll. :) */
return (0);
}
void loop ( )

Definition at line 245 of file testsprite2.c.

References done, i, MoveSprites(), NULL, SDLTest_CommonState::num_windows, SDLTest_CommonState::renderers, SDL_PollEvent, SDLTest_CommonEvent(), and SDLTest_CommonState::windows.

{
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) {
if (state->windows[i] == NULL)
continue;
MoveSprites(state->renderers[i], sprites[i]);
}
#ifdef __EMSCRIPTEN__
if (done) {
emscripten_cancel_main_loop();
}
#endif
}
int main ( int  argc,
char *  argv[] 
)

Definition at line 267 of file testsprite2.c.

References blendMode, cycle_alpha, cycle_color, done, SDL_Rect::h, i, iterations, LoadSprite(), loop(), MAX_SPEED, NULL, NUM_SPRITES, num_sprites, SDLTest_CommonState::num_windows, quit(), renderer, SDLTest_CommonState::renderers, SDL_atoi, SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDFACTOR_ZERO, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, SDL_BLENDMODE_NONE, SDL_BLENDOPERATION_SUBTRACT, SDL_ComposeCustomBlendMode, SDL_GetTicks(), SDL_INIT_VIDEO, SDL_isdigit, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_malloc, SDL_RenderClear, SDL_SetRenderDrawColor, SDL_strcasecmp, SDL_TRUE, SDLTest_CommonArg(), SDLTest_CommonCreateState(), SDLTest_CommonInit(), SDLTest_CommonUsage(), SDLTest_FuzzerInit(), SDLTest_RandomIntegerInRange(), sprite_h, sprite_w, SDL_Rect::w, SDLTest_CommonState::window_h, SDLTest_CommonState::window_w, SDL_Rect::x, and SDL_Rect::y.

{
int i;
Uint32 then, now, frames;
Uint64 seed;
const char *icon = "icon.bmp";
/* Initialize parameters */
num_sprites = NUM_SPRITES;
/* 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 + 1], "sub") == 0) {
blendMode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_SUBTRACT, SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_SUBTRACT);
consumed = 2;
}
}
} else if (SDL_strcasecmp(argv[i], "--iterations") == 0) {
if (argv[i + 1]) {
iterations = SDL_atoi(argv[i + 1]);
if (iterations < -1) iterations = -1;
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_sprites = SDL_atoi(argv[i]);
consumed = 1;
} else if (argv[i][0] != '-') {
icon = argv[i];
consumed = 1;
}
}
if (consumed < 0) {
SDL_Log("Usage: %s %s [--blend none|blend|add|mod] [--cyclecolor] [--cyclealpha] [--iterations N] [num_sprites] [icon.bmp]\n",
argv[0], SDLTest_CommonUsage(state));
quit(1);
}
i += consumed;
}
if (!SDLTest_CommonInit(state)) {
quit(2);
}
/* Create the windows, initialize the renderers, and load the textures */
sprites =
(SDL_Texture **) SDL_malloc(state->num_windows * sizeof(*sprites));
if (!sprites) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
quit(2);
}
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
SDL_RenderClear(renderer);
}
if (LoadSprite(icon) < 0) {
quit(2);
}
/* Allocate memory for the sprite info */
positions = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
velocities = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
if (!positions || !velocities) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
quit(2);
}
/* Position sprites and set their velocities using the fuzzer */
if (iterations >= 0) {
/* Deterministic seed - used for visual tests */
seed = (Uint64)iterations;
} else {
/* Pseudo-random seed generated from the time */
seed = (Uint64)time(NULL);
}
SDLTest_FuzzerInit(seed);
for (i = 0; i < num_sprites; ++i) {
positions[i].x = SDLTest_RandomIntegerInRange(0, state->window_w - sprite_w);
positions[i].y = SDLTest_RandomIntegerInRange(0, state->window_h - sprite_h);
positions[i].w = sprite_w;
positions[i].h = sprite_h;
velocities[i].x = 0;
velocities[i].y = 0;
while (!velocities[i].x && !velocities[i].y) {
velocities[i].x = SDLTest_RandomIntegerInRange(-MAX_SPEED, MAX_SPEED);
velocities[i].y = SDLTest_RandomIntegerInRange(-MAX_SPEED, MAX_SPEED);
}
}
/* 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
/* 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);
}
quit(0);
return 0;
}
void MoveSprites ( SDL_Renderer *  renderer,
SDL_Texture *  sprite 
)

Definition at line 116 of file testsprite2.c.

References current_alpha, current_color, cycle_alpha, cycle_color, cycle_direction, SDL_Rect::h, i, iterations, NULL, num_sprites, SDL_FALSE, SDL_RenderClear, SDL_RenderCopy, SDL_RenderDrawLine, SDL_RenderDrawPoint, SDL_RenderFillRect, SDL_RenderGetViewport, SDL_RenderPresent, SDL_SetRenderDrawColor, SDL_SetTextureAlphaMod, SDL_SetTextureColorMod, sprite_h, sprite_w, viewport, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

{
int i;
SDL_Rect viewport, temp;
SDL_Rect *position, *velocity;
/* Query the sizes */
SDL_RenderGetViewport(renderer, &viewport);
/* 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;
}
SDL_SetTextureColorMod(sprite, 255, (Uint8) current_color,
(Uint8) current_color);
}
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_SetTextureAlphaMod(sprite, (Uint8) current_alpha);
}
/* Draw a gray background */
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
SDL_RenderClear(renderer);
/* Test points */
SDL_SetRenderDrawColor(renderer, 0xFF, 0x00, 0x00, 0xFF);
SDL_RenderDrawPoint(renderer, 0, 0);
SDL_RenderDrawPoint(renderer, viewport.w-1, 0);
SDL_RenderDrawPoint(renderer, 0, viewport.h-1);
SDL_RenderDrawPoint(renderer, viewport.w-1, viewport.h-1);
/* Test horizontal and vertical lines */
SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF);
SDL_RenderDrawLine(renderer, 1, 0, viewport.w-2, 0);
SDL_RenderDrawLine(renderer, 1, viewport.h-1, viewport.w-2, viewport.h-1);
SDL_RenderDrawLine(renderer, 0, 1, 0, viewport.h-2);
SDL_RenderDrawLine(renderer, viewport.w-1, 1, viewport.w-1, viewport.h-2);
/* Test fill and copy */
SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
temp.x = 1;
temp.y = 1;
temp.w = sprite_w;
temp.h = sprite_h;
SDL_RenderFillRect(renderer, &temp);
SDL_RenderCopy(renderer, sprite, NULL, &temp);
temp.x = viewport.w-sprite_w-1;
temp.y = 1;
temp.w = sprite_w;
temp.h = sprite_h;
SDL_RenderFillRect(renderer, &temp);
SDL_RenderCopy(renderer, sprite, NULL, &temp);
temp.x = 1;
temp.y = viewport.h-sprite_h-1;
temp.w = sprite_w;
temp.h = sprite_h;
SDL_RenderFillRect(renderer, &temp);
SDL_RenderCopy(renderer, sprite, NULL, &temp);
temp.x = viewport.w-sprite_w-1;
temp.y = viewport.h-sprite_h-1;
temp.w = sprite_w;
temp.h = sprite_h;
SDL_RenderFillRect(renderer, &temp);
SDL_RenderCopy(renderer, sprite, NULL, &temp);
/* Test diagonal lines */
SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF);
SDL_RenderDrawLine(renderer, sprite_w, sprite_h,
viewport.w-sprite_w-2, viewport.h-sprite_h-2);
SDL_RenderDrawLine(renderer, viewport.w-sprite_w-2, sprite_h,
sprite_w, viewport.h-sprite_h-2);
/* Conditionally move the sprites, bounce at the wall */
if (iterations == -1 || iterations > 0) {
for (i = 0; i < num_sprites; ++i) {
position = &positions[i];
velocity = &velocities[i];
position->x += velocity->x;
if ((position->x < 0) || (position->x >= (viewport.w - sprite_w))) {
velocity->x = -velocity->x;
position->x += velocity->x;
}
position->y += velocity->y;
if ((position->y < 0) || (position->y >= (viewport.h - sprite_h))) {
velocity->y = -velocity->y;
position->y += velocity->y;
}
}
/* Countdown sprite-move iterations and disable color changes at iteration end - used for visual tests. */
if (iterations > 0) {
iterations--;
if (iterations == 0) {
cycle_alpha = SDL_FALSE;
cycle_color = SDL_FALSE;
}
}
}
/* Draw sprites */
for (i = 0; i < num_sprites; ++i) {
position = &positions[i];
/* Blit the sprite onto the screen */
SDL_RenderCopy(renderer, sprite, NULL, position);
}
/* Update the screen! */
SDL_RenderPresent(renderer);
}
static void quit ( int  rc)
static

Definition at line 49 of file testsprite2.c.

References SDL_free, and SDLTest_CommonQuit().

{
SDL_free(sprites);
SDL_free(positions);
SDL_free(velocities);
SDLTest_CommonQuit(state);
exit(rc);
}

Variable Documentation

SDL_BlendMode blendMode = SDL_BLENDMODE_BLEND
static

Definition at line 39 of file testsprite2.c.

Referenced by LoadSprite(), and main().

int current_alpha = 0
static

Definition at line 34 of file testsprite2.c.

Referenced by MoveSprites().

int current_color = 0
static

Definition at line 35 of file testsprite2.c.

Referenced by MoveSprites().

SDL_bool cycle_alpha
static

Definition at line 32 of file testsprite2.c.

Referenced by main(), and MoveSprites().

SDL_bool cycle_color
static

Definition at line 31 of file testsprite2.c.

Referenced by main(), and MoveSprites().

int cycle_direction = 1
static

Definition at line 33 of file testsprite2.c.

Referenced by MoveSprites().

int done

Definition at line 45 of file testsprite2.c.

int iterations = -1
static

Definition at line 43 of file testsprite2.c.

Referenced by main(), MoveSprites(), and SDL_AtomicLock().

int num_sprites
static

Definition at line 29 of file testsprite2.c.

Referenced by main(), and MoveSprites().

SDL_Rect* positions
static

Definition at line 36 of file testsprite2.c.

int sprite_h
static

Definition at line 38 of file testsprite2.c.

Referenced by LoadSprite(), main(), and MoveSprites().

int sprite_w
static

Definition at line 38 of file testsprite2.c.

Referenced by LoadSprite(), main(), and MoveSprites().

SDL_Texture** sprites
static

Definition at line 30 of file testsprite2.c.

SDLTest_CommonState* state
static

Definition at line 28 of file testsprite2.c.

SDL_Rect* velocities
static

Definition at line 37 of file testsprite2.c.