Mercurial > sdl-ios-xcode
view test/testdraw2.c @ 5159:307ccc9c135e
Made it possible to create a texture of any format, even if not supported by the renderer.
This allows me to reduce the set of formats supported by the renderers to the most optimal set, for a nice speed boost.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 03 Feb 2011 00:19:40 -0800 |
parents | ad50b3db78bd |
children | d976b67150c5 |
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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 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, SDL_Renderer * renderer) { int i; int x, y; int window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); 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() % window_w; y = rand() % window_h; SDL_RenderDrawPoint(renderer, x, y); } } void DrawLines(SDL_Window * window, SDL_Renderer * renderer) { int i; int x1, y1, x2, y2; int window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); 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, window_w - 1, window_h - 1); SDL_RenderDrawLine(renderer, 0, window_h - 1, window_w - 1, 0); SDL_RenderDrawLine(renderer, 0, window_h / 2, window_w - 1, window_h / 2); SDL_RenderDrawLine(renderer, window_w / 2, 0, window_w / 2, window_h - 1); } else { x1 = (rand() % (window_w*2)) - window_w; x2 = (rand() % (window_w*2)) - window_w; y1 = (rand() % (window_h*2)) - window_h; y2 = (rand() % (window_h*2)) - window_h; SDL_RenderDrawLine(renderer, x1, y1, x2, y2); } } } void DrawRects(SDL_Window * window, SDL_Renderer * renderer) { int i; SDL_Rect rect; int window_w, window_h; /* Query the sizes */ SDL_GetWindowSize(window, &window_w, &window_h); 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() % (window_h / 2); rect.h = rand() % (window_h / 2); rect.x = (rand() % (window_w*2) - window_w) - (rect.w / 2); rect.y = (rand() % (window_h*2) - window_h) - (rect.h / 2); SDL_RenderFillRect(renderer, &rect); } } int main(int argc, char *argv[]) { 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], "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], "--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|blend|add] [--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_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; while (!done) { /* Check for events */ ++frames; while (SDL_PollEvent(&event)) { CommonEvent(state, &event, &done); } for (i = 0; i < state->num_windows; ++i) { SDL_Renderer *renderer = state->renderers[i]; SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); SDL_RenderClear(renderer); DrawRects(state->windows[i], renderer); DrawLines(state->windows[i], renderer); DrawPoints(state->windows[i], renderer); SDL_RenderPresent(renderer); } } 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: */