fb_test.c revision ab8beedeb70c6941e0ff68014d8db64cee4ef15d
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <stdlib.h> 18#include <unistd.h> 19 20#include <fcntl.h> 21#include <stdio.h> 22 23#include <sys/ioctl.h> 24#include <sys/mman.h> 25#include <sys/types.h> 26#include <time.h> 27 28#include <linux/fb.h> 29#include <linux/kd.h> 30 31#include <pixelflinger/pixelflinger.h> 32 33#include "minui.h" 34 35typedef struct { 36 GGLSurface texture; 37 unsigned cwidth; 38 unsigned cheight; 39 unsigned ascent; 40} GRFont; 41 42static GGLContext *gr_context = 0; 43static GGLSurface gr_framebuffer[2]; 44static unsigned gr_active_fb = 0; 45 46static int gr_fb_fd = -1; 47static int gr_vt_fd = -1; 48 49static struct fb_var_screeninfo vi; 50struct fb_fix_screeninfo fi; 51struct timespec tv, tv2; 52 53static void dumpinfo(struct fb_fix_screeninfo *fi, 54 struct fb_var_screeninfo *vi); 55 56static int get_framebuffer(GGLSurface *fb) 57{ 58 int fd; 59 void *bits; 60 61 fd = open("/dev/graphics/fb0", O_RDWR); 62 if(fd < 0) { 63 perror("cannot open fb0"); 64 return -1; 65 } 66 67 if(ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) { 68 perror("failed to get fb0 info"); 69 return -1; 70 } 71 72 if(ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) { 73 perror("failed to get fb0 info"); 74 return -1; 75 } 76 77 dumpinfo(&fi, &vi); 78 79 bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 80 if(bits == MAP_FAILED) { 81 perror("failed to mmap framebuffer"); 82 return -1; 83 } 84 85 fb->version = sizeof(*fb); 86 fb->width = vi.xres; 87 fb->height = vi.yres; 88 fb->stride = fi.line_length / (vi.bits_per_pixel >> 3); 89 fb->data = bits; 90 fb->format = GGL_PIXEL_FORMAT_RGB_565; 91 92 fb++; 93 94 fb->version = sizeof(*fb); 95 fb->width = vi.xres; 96 fb->height = vi.yres; 97 fb->stride = fi.line_length / (vi.bits_per_pixel >> 3); 98 fb->data = (void*) (((unsigned) bits) + vi.yres * vi.xres * 2); 99 fb->format = GGL_PIXEL_FORMAT_RGB_565; 100 101 return fd; 102} 103 104static void set_active_framebuffer(unsigned n) 105{ 106 if(n > 1) return; 107 vi.yres_virtual = vi.yres * 2; 108 vi.yoffset = n * vi.yres; 109 if(ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) { 110 fprintf(stderr,"active fb swap failed!\n"); 111 } 112} 113 114static void dumpinfo(struct fb_fix_screeninfo *fi, struct fb_var_screeninfo *vi) 115{ 116 fprintf(stderr,"vi.xres = %d\n", vi->xres); 117 fprintf(stderr,"vi.yres = %d\n", vi->yres); 118 fprintf(stderr,"vi.xresv = %d\n", vi->xres_virtual); 119 fprintf(stderr,"vi.yresv = %d\n", vi->yres_virtual); 120 fprintf(stderr,"vi.xoff = %d\n", vi->xoffset); 121 fprintf(stderr,"vi.yoff = %d\n", vi->yoffset); 122 fprintf(stderr, "vi.bits_per_pixel = %d\n", vi->bits_per_pixel); 123 124 fprintf(stderr, "fi.line_length = %d\n", fi->line_length); 125 126} 127 128int gr_init(void) 129{ 130 int fd; 131 132 133 fd = open("/dev/tty0", O_RDWR | O_SYNC); 134 if(fd < 0) return -1; 135 136 if(ioctl(fd, KDSETMODE, (void*) KD_GRAPHICS)) { 137 close(fd); 138 return -1; 139 } 140 141 gr_fb_fd = get_framebuffer(gr_framebuffer); 142 143 if(gr_fb_fd < 0) { 144 ioctl(fd, KDSETMODE, (void*) KD_TEXT); 145 close(fd); 146 return -1; 147 } 148 149 gr_vt_fd = fd; 150 151 /* start with 0 as front (displayed) and 1 as back (drawing) */ 152 gr_active_fb = 0; 153 set_active_framebuffer(0); 154 155 return 0; 156} 157 158void gr_exit(void) 159{ 160 close(gr_fb_fd); 161 gr_fb_fd = -1; 162 163 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT); 164 close(gr_vt_fd); 165 gr_vt_fd = -1; 166} 167 168int gr_fb_width(void) 169{ 170 return gr_framebuffer[0].width; 171} 172 173int gr_fb_height(void) 174{ 175 return gr_framebuffer[0].height; 176} 177 178uint16_t red = 0xf800; 179uint16_t green = 0x07e0; 180uint16_t blue = 0x001f; 181 182void draw_grid(int w, int h, uint16_t* loc) { 183 int i, j; 184 int v; 185 int stride = fi.line_length / (vi.bits_per_pixel >> 3); 186 187 for (j = 0; j < h/2; j++) { 188 for (i = 0; i < w/2; i++) 189 loc[i + j*(stride)] = red; 190 for (; i < w; i++) 191 loc[i + j*(stride)] = green; 192 } 193 for (; j < h; j++) { 194 for (i = 0; i < w/2; i++) 195 loc[i + j*(stride)] = blue; 196 for (; i < w; i++) 197 loc[i + j*(stride)] = 0xffff; 198 } 199 200} 201 202void clear_screen(int w, int h, uint16_t* loc) 203{ 204 int i,j; 205 int stride = fi.line_length / (vi.bits_per_pixel >> 3); 206 207 for (j = 0; j < h; j++) 208 for (i = 0; i < w; i++) 209 loc[i + j*(stride)] = 0x0000; 210} 211 212 213int main(int argc, char **argv) { 214 int w; 215 int h; 216 gr_init(); 217 w = vi.xres; 218 h = vi.yres; 219 clear_screen(w, h, (uint16_t *)gr_framebuffer[0].data); 220 221 if (argc > 2) { 222 w = atoi(argv[1]); 223 h = atoi(argv[2]); 224 } 225 226 draw_grid(w, h, (uint16_t *)gr_framebuffer[0].data); 227 printf("%lld\n", (tv2.tv_sec*1000000000LL + tv2.tv_nsec) - (tv.tv_sec*1000000000LL + tv.tv_nsec)); 228 set_active_framebuffer(1); 229 set_active_framebuffer(0); 230 231 return 0; 232} 233