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author | 2016-02-27 16:28:05 +0100 | |
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committer | 2016-02-27 16:53:49 +0100 | |
commit | cf6dc7d370407914020f3e623719f09c8668c692 (patch) | |
tree | 46b3416d091b4c09b50fba7ffcbd310aed032cc8 /3rdparty/SDL2/test/testintersections.c | |
parent | 64135e73f973d9b95beb0c60b65feb34fbfec64a (diff) |
Placed SDL2 source since we need it on some platforms (nw)
Diffstat (limited to '3rdparty/SDL2/test/testintersections.c')
-rw-r--r-- | 3rdparty/SDL2/test/testintersections.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/3rdparty/SDL2/test/testintersections.c b/3rdparty/SDL2/test/testintersections.c new file mode 100644 index 00000000000..82aae633886 --- /dev/null +++ b/3rdparty/SDL2/test/testintersections.c @@ -0,0 +1,363 @@ +/* + 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 SWAP(typ,a,b) do{typ t=a;a=b;b=t;}while(0) +#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 mouse_begin_x = -1, mouse_begin_y = -1; +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); + } +} + +#define MAX_LINES 16 +int num_lines = 0; +SDL_Rect lines[MAX_LINES]; +static int +add_line(int x1, int y1, int x2, int y2) +{ + if (num_lines >= MAX_LINES) + return 0; + if ((x1 == x2) && (y1 == y2)) + return 0; + + SDL_Log("adding line (%d, %d), (%d, %d)\n", x1, y1, x2, y2); + lines[num_lines].x = x1; + lines[num_lines].y = y1; + lines[num_lines].w = x2; + lines[num_lines].h = y2; + + return ++num_lines; +} + + +void +DrawLines(SDL_Renderer * renderer) +{ + int i; + SDL_Rect viewport; + + /* Query the sizes */ + SDL_RenderGetViewport(renderer, &viewport); + + SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); + + for (i = 0; i < num_lines; ++i) { + if (i == -1) { + 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 { + SDL_RenderDrawLine(renderer, lines[i].x, lines[i].y, lines[i].w, lines[i].h); + } + } +} + +#define MAX_RECTS 16 +int num_rects = 0; +SDL_Rect rects[MAX_RECTS]; +static int +add_rect(int x1, int y1, int x2, int y2) +{ + if (num_rects >= MAX_RECTS) + return 0; + if ((x1 == x2) || (y1 == y2)) + return 0; + + if (x1 > x2) + SWAP(int, x1, x2); + if (y1 > y2) + SWAP(int, y1, y2); + + SDL_Log("adding rect (%d, %d), (%d, %d) [%dx%d]\n", x1, y1, x2, y2, + x2 - x1, y2 - y1); + + rects[num_rects].x = x1; + rects[num_rects].y = y1; + rects[num_rects].w = x2 - x1; + rects[num_rects].h = y2 - y1; + + return ++num_rects; +} + +static void +DrawRects(SDL_Renderer * renderer) +{ + SDL_SetRenderDrawColor(renderer, 255, 127, 0, 255); + SDL_RenderFillRects(renderer, rects, num_rects); +} + +static void +DrawRectLineIntersections(SDL_Renderer * renderer) +{ + int i, j; + + SDL_SetRenderDrawColor(renderer, 0, 255, 55, 255); + + for (i = 0; i < num_rects; i++) + for (j = 0; j < num_lines; j++) { + int x1, y1, x2, y2; + SDL_Rect r; + + r = rects[i]; + x1 = lines[j].x; + y1 = lines[j].y; + x2 = lines[j].w; + y2 = lines[j].h; + + if (SDL_IntersectRectAndLine(&r, &x1, &y1, &x2, &y2)) { + SDL_RenderDrawLine(renderer, x1, y1, x2, y2); + } + } +} + +static void +DrawRectRectIntersections(SDL_Renderer * renderer) +{ + int i, j; + + SDL_SetRenderDrawColor(renderer, 255, 200, 0, 255); + + for (i = 0; i < num_rects; i++) + for (j = i + 1; j < num_rects; j++) { + SDL_Rect r; + if (SDL_IntersectRect(&rects[i], &rects[j], &r)) { + SDL_RenderFillRect(renderer, &r); + } + } +} + +void +loop() +{ + int i; + SDL_Event event; + + /* Check for events */ + while (SDL_PollEvent(&event)) { + SDLTest_CommonEvent(state, &event, &done); + switch (event.type) { + case SDL_MOUSEBUTTONDOWN: + mouse_begin_x = event.button.x; + mouse_begin_y = event.button.y; + break; + case SDL_MOUSEBUTTONUP: + if (event.button.button == 3) + add_line(mouse_begin_x, mouse_begin_y, event.button.x, + event.button.y); + if (event.button.button == 1) + add_rect(mouse_begin_x, mouse_begin_y, event.button.x, + event.button.y); + break; + case SDL_KEYDOWN: + switch (event.key.keysym.sym) { + case 'l': + if (event.key.keysym.mod & KMOD_SHIFT) + num_lines = 0; + else + add_line(rand() % 640, rand() % 480, rand() % 640, + rand() % 480); + break; + case 'r': + if (event.key.keysym.mod & KMOD_SHIFT) + num_rects = 0; + else + add_rect(rand() % 640, rand() % 480, rand() % 640, + rand() % 480); + break; + } + break; + default: + break; + } + } + 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); + DrawPoints(renderer); + DrawRectRectIntersections(renderer); + DrawLines(renderer); + DrawRectLineIntersections(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(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: */ |