Add SDL2 sources

2025-09-23 23:00:42 +00:00 · 2020-10-09 16:19:18 -04:00
parent 15282f2ab2
commit 1b497cb1f7
1219 changed files with 484043 additions and 673 deletions
--- a/SDL2-2.0.12/test/testspriteminimal.c
+++ b/SDL2-2.0.12/test/testspriteminimal.c
@@ -0,0 +1,194 @@
+/*
+  Copyright (C) 1997-2020 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:  Move N sprites around on the screen as fast as possible */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
+
+#include "SDL.h"
+
+#define WINDOW_WIDTH    640
+#define WINDOW_HEIGHT   480
+#define NUM_SPRITES     100
+#define MAX_SPEED       1
+
+static SDL_Texture *sprite;
+static SDL_Rect positions[NUM_SPRITES];
+static SDL_Rect velocities[NUM_SPRITES];
+static int sprite_w, sprite_h;
+
+SDL_Renderer *renderer;
+int done;
+
+/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
+static void
+quit(int rc)
+{
+    exit(rc);
+}
+
+int
+LoadSprite(char *file, SDL_Renderer *renderer)
+{
+    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\n", 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, SDL_TRUE, *(Uint8 *) temp->pixels);
+    } else {
+        switch (temp->format->BitsPerPixel) {
+        case 15:
+            SDL_SetColorKey(temp, SDL_TRUE,
+                            (*(Uint16 *) temp->pixels) & 0x00007FFF);
+            break;
+        case 16:
+            SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
+            break;
+        case 24:
+            SDL_SetColorKey(temp, SDL_TRUE,
+                            (*(Uint32 *) temp->pixels) & 0x00FFFFFF);
+            break;
+        case 32:
+            SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
+            break;
+        }
+    }
+
+    /* Create textures from the image */
+    sprite = SDL_CreateTextureFromSurface(renderer, temp);
+    if (!sprite) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
+        SDL_FreeSurface(temp);
+        return (-1);
+    }
+    SDL_FreeSurface(temp);
+
+    /* We're ready to roll. :) */
+    return (0);
+}
+
+void
+MoveSprites(SDL_Renderer * renderer, SDL_Texture * sprite)
+{
+    int i;
+    int window_w = WINDOW_WIDTH;
+    int window_h = WINDOW_HEIGHT;
+    SDL_Rect *position, *velocity;
+
+    /* Draw a gray background */
+    SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
+    SDL_RenderClear(renderer);
+
+    /* Move the sprite, bounce at the wall, and draw */
+    for (i = 0; i < NUM_SPRITES; ++i) {
+        position = &positions[i];
+        velocity = &velocities[i];
+        position->x += velocity->x;
+        if ((position->x < 0) || (position->x >= (window_w - sprite_w))) {
+            velocity->x = -velocity->x;
+            position->x += velocity->x;
+        }
+        position->y += velocity->y;
+        if ((position->y < 0) || (position->y >= (window_h - sprite_h))) {
+            velocity->y = -velocity->y;
+            position->y += velocity->y;
+        }
+
+        /* Blit the sprite onto the screen */
+        SDL_RenderCopy(renderer, sprite, NULL, position);
+    }
+
+    /* Update the screen! */
+    SDL_RenderPresent(renderer);
+}
+
+void loop()
+{
+    SDL_Event event;
+
+    /* Check for events */
+    while (SDL_PollEvent(&event)) {
+        if (event.type == SDL_QUIT || event.type == SDL_KEYDOWN) {
+            done = 1;
+        }
+    }
+    MoveSprites(renderer, sprite);
+#ifdef __EMSCRIPTEN__
+    if (done) {
+        emscripten_cancel_main_loop();
+    }
+#endif
+}
+
+int
+main(int argc, char *argv[])
+{
+    SDL_Window *window;
+    int i;
+
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    if (SDL_CreateWindowAndRenderer(WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer) < 0) {
+        quit(2);
+    }
+
+    if (LoadSprite("icon.bmp", renderer) < 0) {
+        quit(2);
+    }
+
+    /* Initialize the sprite positions */
+    srand(time(NULL));
+    for (i = 0; i < NUM_SPRITES; ++i) {
+        positions[i].x = rand() % (WINDOW_WIDTH - sprite_w);
+        positions[i].y = rand() % (WINDOW_HEIGHT - 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 = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
+            velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
+        }
+    }
+
+    /* Main render loop */
+    done = 0;
+
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(loop, 0, 1);
+#else
+    while (!done) {
+        loop();
+    }
+#endif
+    quit(0);
+
+    return 0; /* to prevent compiler warning */
+}
+
+/* vi: set ts=4 sw=4 expandtab: */