Mercurial > sdl-ios-xcode
view test/testintersections.c @ 4495:dbbfdb9ea716
Simplified clipboard API for sanity's sake.
A complete clipboard implementation would support multiple formats that could be queried at runtime, events for when the clipboard contents changed, support for HTML, images, etc. We're not going that crazy, at least for now. :)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 07 Jul 2010 23:54:03 -0700 |
parents | 3e69e077cb95 |
children | e743b9c3f6d6 |
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/* Simple program: draw as many random objects on the screen as possible */ #include <stdlib.h> #include <stdio.h> #include <time.h> #include "common.h" #define SWAP(typ,a,b) do{typ t=a;a=b;b=t;}while(0) #define NUM_OBJECTS 100 static 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; void DrawPoints(SDL_Window * window) { int i; int x, y; int window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); SDL_SetRenderDrawBlendMode(blendMode); 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(255, (Uint8) current_color, (Uint8) current_color, (Uint8) current_alpha); x = rand() % window_w; y = rand() % window_h; SDL_RenderDrawPoint(x, y); } SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); } #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; printf("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_Window * window) { int i; int x1, y1, x2, y2; int window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); SDL_SetRenderDrawBlendMode(blendMode); for (i = 0; i < num_lines; ++i) { SDL_SetRenderDrawColor(255, 255, 255, 255); if (i == -1) { SDL_RenderDrawLine(0, 0, window_w - 1, window_h - 1); SDL_RenderDrawLine(0, window_h - 1, window_w - 1, 0); SDL_RenderDrawLine(0, window_h / 2, window_w - 1, window_h / 2); SDL_RenderDrawLine(window_w / 2, 0, window_w / 2, window_h - 1); } else { SDL_RenderDrawLine(lines[i].x, lines[i].y, lines[i].w, lines[i].h); } } SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); } #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); printf("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_Window * window) { int i; int window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); for (i = 0; i < num_rects; ++i) { SDL_SetRenderDrawColor(255, 127, 0, 255); SDL_RenderFillRect(&rects[i]); } SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); } static void DrawRectLineIntersections(SDL_Window * window) { int i, j, window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); 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_SetRenderDrawColor(0, 255, 55, 255); SDL_RenderDrawLine(x1, y1, x2, y2); } } SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); } static void DrawRectRectIntersections(SDL_Window * window) { int i, j; SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); 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_SetRenderDrawColor(255, 200, 0, 255); SDL_RenderFillRect(&r); } } SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE); } int main(int argc, char *argv[]) { int mouse_begin_x = -1, mouse_begin_y = -1; int i, done; SDL_Event event; Uint32 then, now, frames; /* Initialize parameters */ num_objects = NUM_OBJECTS; /* Initialize test framework */ state = CommonCreateState(argv, SDL_INIT_VIDEO); if (!state) { return 1; } for (i = 1; i < argc;) { int consumed; consumed = 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], "mask") == 0) { blendMode = SDL_BLENDMODE_MASK; 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) { fprintf(stderr, "Usage: %s %s [--blend none|mask|blend|add|mod] [--cyclecolor] [--cyclealpha]\n", argv[0], CommonUsage(state)); return 1; } i += consumed; } if (!CommonInit(state)) { return 2; } /* Create the windows and initialize the renderers */ for (i = 0; i < state->num_windows; ++i) { SDL_SelectRenderer(state->windows[i]); SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); SDL_RenderClear(); } srand(time(NULL)); /* Main render loop */ frames = 0; then = SDL_GetTicks(); done = 0; while (!done) { /* Check for events */ ++frames; while (SDL_PollEvent(&event)) { 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; case SDL_WINDOWEVENT: switch (event.window.event) { case SDL_WINDOWEVENT_EXPOSED: SDL_SelectRenderer(SDL_GetWindowFromID(event.window.windowID)); SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); SDL_RenderClear(); break; } break; default: break; } } for (i = 0; i < state->num_windows; ++i) { SDL_SelectRenderer(state->windows[i]); SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF); SDL_RenderClear(); DrawRects(state->windows[i]); DrawPoints(state->windows[i]); DrawRectRectIntersections(state->windows[i]); DrawLines(state->windows[i]); DrawRectLineIntersections(state->windows[i]); SDL_RenderPresent(); } } CommonQuit(state); /* Print out some timing information */ now = SDL_GetTicks(); if (now > then) { double fps = ((double) frames * 1000) / (now - then); printf("%2.2f frames per second\n", fps); } return 0; } /* vi: set ts=4 sw=4 expandtab: */