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