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