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 <stdbool.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20
21 #include <fcntl.h>
22 #include <stdio.h>
23
24 #include <sys/ioctl.h>
25 #include <sys/mman.h>
26 #include <sys/types.h>
27
28 #include <linux/fb.h>
29 #include <linux/kd.h>
30
31 #include <pixelflinger/pixelflinger.h>
32
33 #include "font_10x18.h"
34 #include "minui.h"
35
36 #if defined(RECOVERY_BGRA)
37 #define PIXEL_FORMAT GGL_PIXEL_FORMAT_BGRA_8888
38 #define PIXEL_SIZE 4
39 #elif defined(RECOVERY_RGBX)
40 #define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGBX_8888
41 #define PIXEL_SIZE 4
42 #else
43 #define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGB_565
44 #define PIXEL_SIZE 2
45 #endif
46
47 #define NUM_BUFFERS 2
48
49 typedef struct {
50 GGLSurface texture;
51 unsigned cwidth;
52 unsigned cheight;
53 unsigned ascent;
54 } GRFont;
55
56 static GRFont *gr_font = 0;
57 static GGLContext *gr_context = 0;
58 static GGLSurface gr_font_texture;
59 static GGLSurface gr_framebuffer[NUM_BUFFERS];
60 static GGLSurface gr_mem_surface;
61 static unsigned gr_active_fb = 0;
62 static unsigned double_buffering = 0;
63
64 static int gr_fb_fd = -1;
65 static int gr_vt_fd = -1;
66
67 static struct fb_var_screeninfo vi;
68 static struct fb_fix_screeninfo fi;
69
get_framebuffer(GGLSurface * fb)70 static int get_framebuffer(GGLSurface *fb)
71 {
72 int fd;
73 void *bits;
74
75 fd = open("/dev/graphics/fb0", O_RDWR);
76 if (fd < 0) {
77 perror("cannot open fb0");
78 return -1;
79 }
80
81 if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
82 perror("failed to get fb0 info");
83 close(fd);
84 return -1;
85 }
86
87 vi.bits_per_pixel = PIXEL_SIZE * 8;
88 if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_BGRA_8888) {
89 vi.red.offset = 8;
90 vi.red.length = 8;
91 vi.green.offset = 16;
92 vi.green.length = 8;
93 vi.blue.offset = 24;
94 vi.blue.length = 8;
95 vi.transp.offset = 0;
96 vi.transp.length = 8;
97 } else if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_RGBX_8888) {
98 vi.red.offset = 24;
99 vi.red.length = 8;
100 vi.green.offset = 16;
101 vi.green.length = 8;
102 vi.blue.offset = 8;
103 vi.blue.length = 8;
104 vi.transp.offset = 0;
105 vi.transp.length = 8;
106 } else { /* RGB565*/
107 vi.red.offset = 11;
108 vi.red.length = 5;
109 vi.green.offset = 5;
110 vi.green.length = 6;
111 vi.blue.offset = 0;
112 vi.blue.length = 5;
113 vi.transp.offset = 0;
114 vi.transp.length = 0;
115 }
116 if (ioctl(fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
117 perror("failed to put fb0 info");
118 close(fd);
119 return -1;
120 }
121
122 if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
123 perror("failed to get fb0 info");
124 close(fd);
125 return -1;
126 }
127
128 bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
129 if (bits == MAP_FAILED) {
130 perror("failed to mmap framebuffer");
131 close(fd);
132 return -1;
133 }
134
135 fb->version = sizeof(*fb);
136 fb->width = vi.xres;
137 fb->height = vi.yres;
138 fb->stride = fi.line_length/PIXEL_SIZE;
139 fb->data = bits;
140 fb->format = PIXEL_FORMAT;
141 memset(fb->data, 0, vi.yres * fi.line_length);
142
143 fb++;
144
145 /* check if we can use double buffering */
146 if (vi.yres * fi.line_length * 2 > fi.smem_len)
147 return fd;
148
149 double_buffering = 1;
150
151 fb->version = sizeof(*fb);
152 fb->width = vi.xres;
153 fb->height = vi.yres;
154 fb->stride = fi.line_length/PIXEL_SIZE;
155 fb->data = (void*) (((unsigned) bits) + vi.yres * fi.line_length);
156 fb->format = PIXEL_FORMAT;
157 memset(fb->data, 0, vi.yres * fi.line_length);
158
159 return fd;
160 }
161
get_memory_surface(GGLSurface * ms)162 static void get_memory_surface(GGLSurface* ms) {
163 ms->version = sizeof(*ms);
164 ms->width = vi.xres;
165 ms->height = vi.yres;
166 ms->stride = fi.line_length/PIXEL_SIZE;
167 ms->data = malloc(fi.line_length * vi.yres);
168 ms->format = PIXEL_FORMAT;
169 }
170
set_active_framebuffer(unsigned n)171 static void set_active_framebuffer(unsigned n)
172 {
173 if (n > 1 || !double_buffering) return;
174 vi.yres_virtual = vi.yres * NUM_BUFFERS;
175 vi.yoffset = n * vi.yres;
176 vi.bits_per_pixel = PIXEL_SIZE * 8;
177 if (ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
178 perror("active fb swap failed");
179 }
180 }
181
gr_flip(void)182 void gr_flip(void)
183 {
184 GGLContext *gl = gr_context;
185
186 /* swap front and back buffers */
187 if (double_buffering)
188 gr_active_fb = (gr_active_fb + 1) & 1;
189
190 /* copy data from the in-memory surface to the buffer we're about
191 * to make active. */
192 memcpy(gr_framebuffer[gr_active_fb].data, gr_mem_surface.data,
193 fi.line_length * vi.yres);
194
195 /* inform the display driver */
196 set_active_framebuffer(gr_active_fb);
197 }
198
gr_color(unsigned char r,unsigned char g,unsigned char b,unsigned char a)199 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
200 {
201 GGLContext *gl = gr_context;
202 GGLint color[4];
203 color[0] = ((r << 8) | r) + 1;
204 color[1] = ((g << 8) | g) + 1;
205 color[2] = ((b << 8) | b) + 1;
206 color[3] = ((a << 8) | a) + 1;
207 gl->color4xv(gl, color);
208 }
209
gr_measure(const char * s)210 int gr_measure(const char *s)
211 {
212 return gr_font->cwidth * strlen(s);
213 }
214
gr_font_size(int * x,int * y)215 void gr_font_size(int *x, int *y)
216 {
217 *x = gr_font->cwidth;
218 *y = gr_font->cheight;
219 }
220
gr_text(int x,int y,const char * s)221 int gr_text(int x, int y, const char *s)
222 {
223 GGLContext *gl = gr_context;
224 GRFont *font = gr_font;
225 unsigned off;
226
227 y -= font->ascent;
228
229 gl->bindTexture(gl, &font->texture);
230 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
231 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
232 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
233 gl->enable(gl, GGL_TEXTURE_2D);
234
235 while((off = *s++)) {
236 off -= 32;
237 if (off < 96) {
238 gl->texCoord2i(gl, (off * font->cwidth) - x, 0 - y);
239 gl->recti(gl, x, y, x + font->cwidth, y + font->cheight);
240 }
241 x += font->cwidth;
242 }
243
244 return x;
245 }
246
gr_texticon(int x,int y,gr_surface icon)247 void gr_texticon(int x, int y, gr_surface icon) {
248 if (gr_context == NULL || icon == NULL) {
249 return;
250 }
251 GGLContext* gl = gr_context;
252
253 gl->bindTexture(gl, (GGLSurface*) icon);
254 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
255 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
256 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
257 gl->enable(gl, GGL_TEXTURE_2D);
258
259 int w = gr_get_width(icon);
260 int h = gr_get_height(icon);
261
262 gl->texCoord2i(gl, -x, -y);
263 gl->recti(gl, x, y, x+gr_get_width(icon), y+gr_get_height(icon));
264 }
265
gr_fill(int x,int y,int w,int h)266 void gr_fill(int x, int y, int w, int h)
267 {
268 GGLContext *gl = gr_context;
269 gl->disable(gl, GGL_TEXTURE_2D);
270 gl->recti(gl, x, y, w, h);
271 }
272
gr_blit(gr_surface source,int sx,int sy,int w,int h,int dx,int dy)273 void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) {
274 if (gr_context == NULL || source == NULL) {
275 return;
276 }
277 GGLContext *gl = gr_context;
278
279 gl->bindTexture(gl, (GGLSurface*) source);
280 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
281 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
282 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
283 gl->enable(gl, GGL_TEXTURE_2D);
284 gl->texCoord2i(gl, sx - dx, sy - dy);
285 gl->recti(gl, dx, dy, dx + w, dy + h);
286 }
287
gr_get_width(gr_surface surface)288 unsigned int gr_get_width(gr_surface surface) {
289 if (surface == NULL) {
290 return 0;
291 }
292 return ((GGLSurface*) surface)->width;
293 }
294
gr_get_height(gr_surface surface)295 unsigned int gr_get_height(gr_surface surface) {
296 if (surface == NULL) {
297 return 0;
298 }
299 return ((GGLSurface*) surface)->height;
300 }
301
gr_init_font(void)302 static void gr_init_font(void)
303 {
304 GGLSurface *ftex;
305 unsigned char *bits, *rle;
306 unsigned char *in, data;
307
308 gr_font = calloc(sizeof(*gr_font), 1);
309 ftex = &gr_font->texture;
310
311 bits = malloc(font.width * font.height);
312
313 ftex->version = sizeof(*ftex);
314 ftex->width = font.width;
315 ftex->height = font.height;
316 ftex->stride = font.width;
317 ftex->data = (void*) bits;
318 ftex->format = GGL_PIXEL_FORMAT_A_8;
319
320 in = font.rundata;
321 while((data = *in++)) {
322 memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
323 bits += (data & 0x7f);
324 }
325
326 gr_font->cwidth = font.cwidth;
327 gr_font->cheight = font.cheight;
328 gr_font->ascent = font.cheight - 2;
329 }
330
gr_init(void)331 int gr_init(void)
332 {
333 gglInit(&gr_context);
334 GGLContext *gl = gr_context;
335
336 gr_init_font();
337 gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
338 if (gr_vt_fd < 0) {
339 // This is non-fatal; post-Cupcake kernels don't have tty0.
340 perror("can't open /dev/tty0");
341 } else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
342 // However, if we do open tty0, we expect the ioctl to work.
343 perror("failed KDSETMODE to KD_GRAPHICS on tty0");
344 gr_exit();
345 return -1;
346 }
347
348 gr_fb_fd = get_framebuffer(gr_framebuffer);
349 if (gr_fb_fd < 0) {
350 gr_exit();
351 return -1;
352 }
353
354 get_memory_surface(&gr_mem_surface);
355
356 fprintf(stderr, "framebuffer: fd %d (%d x %d)\n",
357 gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height);
358
359 /* start with 0 as front (displayed) and 1 as back (drawing) */
360 gr_active_fb = 0;
361 set_active_framebuffer(0);
362 gl->colorBuffer(gl, &gr_mem_surface);
363
364 gl->activeTexture(gl, 0);
365 gl->enable(gl, GGL_BLEND);
366 gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA);
367
368 gr_fb_blank(true);
369 gr_fb_blank(false);
370
371 return 0;
372 }
373
gr_exit(void)374 void gr_exit(void)
375 {
376 close(gr_fb_fd);
377 gr_fb_fd = -1;
378
379 free(gr_mem_surface.data);
380
381 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT);
382 close(gr_vt_fd);
383 gr_vt_fd = -1;
384 }
385
gr_fb_width(void)386 int gr_fb_width(void)
387 {
388 return gr_framebuffer[0].width;
389 }
390
gr_fb_height(void)391 int gr_fb_height(void)
392 {
393 return gr_framebuffer[0].height;
394 }
395
gr_fb_data(void)396 gr_pixel *gr_fb_data(void)
397 {
398 return (unsigned short *) gr_mem_surface.data;
399 }
400
gr_fb_blank(bool blank)401 void gr_fb_blank(bool blank)
402 {
403 int ret;
404
405 ret = ioctl(gr_fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
406 if (ret < 0)
407 perror("ioctl(): blank");
408 }
409