| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <dirent.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <zircon/process.h> |
| #include <zircon/syscalls.h> |
| #include <zircon/types.h> |
| |
| #include <gfx/gfx.h> |
| |
| #include <lib/framebuffer/framebuffer.h> |
| |
| int main(int argc, char* argv[]) { |
| const char* err; |
| zx_status_t status = fb_bind(true, &err); |
| if (status != ZX_OK) { |
| printf("failed to open framebuffer: %d (%s)\n", status, err); |
| return -1; |
| } |
| uint32_t width; |
| uint32_t height; |
| uint32_t stride; |
| zx_pixel_format_t format; |
| |
| fb_get_config(&width, &height, &stride, &format); |
| |
| size_t size = stride * ZX_PIXEL_FORMAT_BYTES(format) * height; |
| uintptr_t fbo; |
| status = zx_vmar_map(zx_vmar_root_self(), |
| ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, |
| 0, fb_get_single_buffer(), 0, size, &fbo); |
| if (status < 0) { |
| printf("failed to map fb (%d)\n", status); |
| return -1; |
| } |
| |
| gfx_surface* gfx = gfx_create_surface((void*)fbo, width, height, stride, |
| format, GFX_FLAG_FLUSH_CPU_CACHE); |
| if (!gfx) { |
| printf("failed to create gfx surface\n"); |
| return -1; |
| } |
| gfx_fillrect(gfx, 0, 0, gfx->width, gfx->height, 0xffffffff); |
| gfx_flush(gfx); |
| |
| double a,b, dx, dy, mag, c, ci; |
| uint32_t color,iter,x,y; |
| |
| bool rotate = (gfx->height > gfx->width); |
| |
| dx= 3.0/((double)gfx->width); |
| dy= 3.0/((double)gfx->height); |
| c = -2.0; |
| ci = -1.5; |
| for (y = 0; y < gfx->height; y++) { |
| if (rotate) { |
| ci = -1.5; |
| } else { |
| c = -2.0; |
| } |
| for (x = 0; x < gfx->width; x++) { |
| a=0; |
| b=0; |
| mag=0; |
| iter = 0; |
| while ((mag < 4.0) && (iter < 200) ){ |
| double a1; |
| a1 = a*a - b*b + c; |
| b = 2.0 * a * b + ci; |
| a=a1; |
| mag = a*a + b*b; |
| iter++; |
| } |
| if (rotate) { |
| ci = ci + dx; |
| } else { |
| c = c + dx; |
| } |
| if (iter == 200) { |
| color = 0; |
| } else { |
| color = 0x231AF9 * iter; |
| } |
| color= color | 0xff000000; |
| gfx_putpixel(gfx, x, y, color); |
| |
| } |
| if ((y%50) == 0) |
| gfx_flush(gfx); |
| if (rotate) { |
| c = c + dy; |
| } else { |
| ci = ci + dy; |
| } |
| } |
| gfx_flush(gfx); |
| zx_nanosleep(zx_deadline_after(ZX_SEC(10))); |
| |
| gfx_surface_destroy(gfx); |
| fb_release(); |
| } |