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 27 #include <linux/fb.h> 28 #include <linux/kd.h> 29 30 #include <pixelflinger/pixelflinger.h> 31 32 #include "font_10x18.h" 33 #include "minui.h" 34 35 typedef struct { 36 GGLSurface texture; 37 unsigned cwidth; 38 unsigned cheight; 39 unsigned ascent; 40 } GRFont; 41 42 static GRFont *gr_font = 0; 43 static GGLContext *gr_context = 0; 44 static GGLSurface gr_font_texture; 45 static GGLSurface gr_framebuffer[2]; 46 static GGLSurface gr_mem_surface; 47 static unsigned gr_active_fb = 0; 48 49 static int gr_fb_fd = -1; 50 static int gr_vt_fd = -1; 51 52 static struct fb_var_screeninfo vi; 53 54 static int get_framebuffer(GGLSurface *fb) 55 { 56 int fd; 57 struct fb_fix_screeninfo fi; 58 void *bits; 59 60 fd = open("/dev/graphics/fb0", O_RDWR); 61 if (fd < 0) { 62 perror("cannot open fb0"); 63 return -1; 64 } 65 66 if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) { 67 perror("failed to get fb0 info"); 68 close(fd); 69 return -1; 70 } 71 72 if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) { 73 perror("failed to get fb0 info"); 74 close(fd); 75 return -1; 76 } 77 78 bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 79 if (bits == MAP_FAILED) { 80 perror("failed to mmap framebuffer"); 81 close(fd); 82 return -1; 83 } 84 85 fb->version = sizeof(*fb); 86 fb->width = vi.xres; 87 fb->height = vi.yres; 88 fb->stride = vi.xres; 89 fb->data = bits; 90 fb->format = GGL_PIXEL_FORMAT_RGB_565; 91 memset(fb->data, 0, vi.yres * vi.xres * 2); 92 93 fb++; 94 95 fb->version = sizeof(*fb); 96 fb->width = vi.xres; 97 fb->height = vi.yres; 98 fb->stride = vi.xres; 99 fb->data = (void*) (((unsigned) bits) + vi.yres * vi.xres * 2); 100 fb->format = GGL_PIXEL_FORMAT_RGB_565; 101 memset(fb->data, 0, vi.yres * vi.xres * 2); 102 103 return fd; 104 } 105 106 static void get_memory_surface(GGLSurface* ms) { 107 ms->version = sizeof(*ms); 108 ms->width = vi.xres; 109 ms->height = vi.yres; 110 ms->stride = vi.xres; 111 ms->data = malloc(vi.xres * vi.yres * 2); 112 ms->format = GGL_PIXEL_FORMAT_RGB_565; 113 } 114 115 static void set_active_framebuffer(unsigned n) 116 { 117 if (n > 1) return; 118 vi.yres_virtual = vi.yres * 2; 119 vi.yoffset = n * vi.yres; 120 vi.bits_per_pixel = 16; 121 if (ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) { 122 perror("active fb swap failed"); 123 } 124 } 125 126 void gr_flip(void) 127 { 128 GGLContext *gl = gr_context; 129 130 /* swap front and back buffers */ 131 gr_active_fb = (gr_active_fb + 1) & 1; 132 133 /* copy data from the in-memory surface to the buffer we're about 134 * to make active. */ 135 memcpy(gr_framebuffer[gr_active_fb].data, gr_mem_surface.data, 136 vi.xres * vi.yres * 2); 137 138 /* inform the display driver */ 139 set_active_framebuffer(gr_active_fb); 140 } 141 142 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) 143 { 144 GGLContext *gl = gr_context; 145 GGLint color[4]; 146 color[0] = ((r << 8) | r) + 1; 147 color[1] = ((g << 8) | g) + 1; 148 color[2] = ((b << 8) | b) + 1; 149 color[3] = ((a << 8) | a) + 1; 150 gl->color4xv(gl, color); 151 } 152 153 int gr_measure(const char *s) 154 { 155 return gr_font->cwidth * strlen(s); 156 } 157 158 int gr_text(int x, int y, const char *s) 159 { 160 GGLContext *gl = gr_context; 161 GRFont *font = gr_font; 162 unsigned off; 163 164 y -= font->ascent; 165 166 gl->bindTexture(gl, &font->texture); 167 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); 168 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 169 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 170 gl->enable(gl, GGL_TEXTURE_2D); 171 172 while((off = *s++)) { 173 off -= 32; 174 if (off < 96) { 175 gl->texCoord2i(gl, (off * font->cwidth) - x, 0 - y); 176 gl->recti(gl, x, y, x + font->cwidth, y + font->cheight); 177 } 178 x += font->cwidth; 179 } 180 181 return x; 182 } 183 184 void gr_fill(int x, int y, int w, int h) 185 { 186 GGLContext *gl = gr_context; 187 gl->disable(gl, GGL_TEXTURE_2D); 188 gl->recti(gl, x, y, w, h); 189 } 190 191 void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) { 192 if (gr_context == NULL) { 193 return; 194 } 195 GGLContext *gl = gr_context; 196 197 gl->bindTexture(gl, (GGLSurface*) source); 198 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); 199 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 200 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 201 gl->enable(gl, GGL_TEXTURE_2D); 202 gl->texCoord2i(gl, sx - dx, sy - dy); 203 gl->recti(gl, dx, dy, dx + w, dy + h); 204 } 205 206 unsigned int gr_get_width(gr_surface surface) { 207 if (surface == NULL) { 208 return 0; 209 } 210 return ((GGLSurface*) surface)->width; 211 } 212 213 unsigned int gr_get_height(gr_surface surface) { 214 if (surface == NULL) { 215 return 0; 216 } 217 return ((GGLSurface*) surface)->height; 218 } 219 220 static void gr_init_font(void) 221 { 222 GGLSurface *ftex; 223 unsigned char *bits, *rle; 224 unsigned char *in, data; 225 226 gr_font = calloc(sizeof(*gr_font), 1); 227 ftex = &gr_font->texture; 228 229 bits = malloc(font.width * font.height); 230 231 ftex->version = sizeof(*ftex); 232 ftex->width = font.width; 233 ftex->height = font.height; 234 ftex->stride = font.width; 235 ftex->data = (void*) bits; 236 ftex->format = GGL_PIXEL_FORMAT_A_8; 237 238 in = font.rundata; 239 while((data = *in++)) { 240 memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f); 241 bits += (data & 0x7f); 242 } 243 244 gr_font->cwidth = font.cwidth; 245 gr_font->cheight = font.cheight; 246 gr_font->ascent = font.cheight - 2; 247 } 248 249 int gr_init(void) 250 { 251 gglInit(&gr_context); 252 GGLContext *gl = gr_context; 253 254 gr_init_font(); 255 gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC); 256 if (gr_vt_fd < 0) { 257 // This is non-fatal; post-Cupcake kernels don't have tty0. 258 perror("can't open /dev/tty0"); 259 } else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) { 260 // However, if we do open tty0, we expect the ioctl to work. 261 perror("failed KDSETMODE to KD_GRAPHICS on tty0"); 262 gr_exit(); 263 return -1; 264 } 265 266 gr_fb_fd = get_framebuffer(gr_framebuffer); 267 if (gr_fb_fd < 0) { 268 gr_exit(); 269 return -1; 270 } 271 272 get_memory_surface(&gr_mem_surface); 273 274 fprintf(stderr, "framebuffer: fd %d (%d x %d)\n", 275 gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height); 276 277 /* start with 0 as front (displayed) and 1 as back (drawing) */ 278 gr_active_fb = 0; 279 set_active_framebuffer(0); 280 gl->colorBuffer(gl, &gr_mem_surface); 281 282 gl->activeTexture(gl, 0); 283 gl->enable(gl, GGL_BLEND); 284 gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA); 285 286 return 0; 287 } 288 289 void gr_exit(void) 290 { 291 close(gr_fb_fd); 292 gr_fb_fd = -1; 293 294 free(gr_mem_surface.data); 295 296 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT); 297 close(gr_vt_fd); 298 gr_vt_fd = -1; 299 } 300 301 int gr_fb_width(void) 302 { 303 return gr_framebuffer[0].width; 304 } 305 306 int gr_fb_height(void) 307 { 308 return gr_framebuffer[0].height; 309 } 310 311 gr_pixel *gr_fb_data(void) 312 { 313 return (unsigned short *) gr_mem_surface.data; 314 } 315
