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The Android Open Source Projectc24a8e62009-03-03 19:28:42 -08001/*
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
Dima Zavin4daf48a2011-08-30 11:59:20 -070017#include <stdbool.h>
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080018#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
Doug Zongker16f97c32014-03-06 16:16:05 -080031#include <time.h>
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080032
Doug Zongker6fd59ac2013-03-06 15:01:11 -080033#include "font_10x18.h"
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080034#include "minui.h"
Doug Zongker5290f202014-03-11 13:22:04 -070035#include "graphics.h"
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080036
37typedef struct {
Doug Zongker16f97c32014-03-06 16:16:05 -080038 GRSurface* texture;
39 int cwidth;
40 int cheight;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080041} GRFont;
42
Doug Zongker16f97c32014-03-06 16:16:05 -080043static GRFont* gr_font = NULL;
Doug Zongker5290f202014-03-11 13:22:04 -070044static minui_backend* gr_backend = NULL;
Doug Zongker16f97c32014-03-06 16:16:05 -080045
Doug Zongkerc560a672012-12-18 16:31:27 -080046static int overscan_percent = OVERSCAN_PERCENT;
47static int overscan_offset_x = 0;
48static int overscan_offset_y = 0;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080049
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080050static int gr_vt_fd = -1;
51
Doug Zongker16f97c32014-03-06 16:16:05 -080052static unsigned char gr_current_r = 255;
53static unsigned char gr_current_g = 255;
54static unsigned char gr_current_b = 255;
55static unsigned char gr_current_a = 255;
56
Doug Zongker5290f202014-03-11 13:22:04 -070057static GRSurface* gr_draw = NULL;
Doug Zongker16f97c32014-03-06 16:16:05 -080058
59static bool outside(int x, int y)
60{
61 return x < 0 || x >= gr_draw->width || y < 0 || y >= gr_draw->height;
62}
63
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080064int gr_measure(const char *s)
65{
66 return gr_font->cwidth * strlen(s);
67}
68
Dima Zavin3c7f00e2011-08-30 11:58:24 -070069void gr_font_size(int *x, int *y)
70{
71 *x = gr_font->cwidth;
72 *y = gr_font->cheight;
73}
74
Doug Zongker16f97c32014-03-06 16:16:05 -080075static void text_blend(unsigned char* src_p, int src_row_bytes,
76 unsigned char* dst_p, int dst_row_bytes,
77 int width, int height)
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -080078{
Doug Zongker16f97c32014-03-06 16:16:05 -080079 int i, j;
80 for (j = 0; j < height; ++j) {
81 unsigned char* sx = src_p;
82 unsigned char* px = dst_p;
83 for (i = 0; i < width; ++i) {
84 unsigned char a = *sx++;
85 if (gr_current_a < 255) a = ((int)a * gr_current_a) / 255;
86 if (a == 255) {
87 *px++ = gr_current_r;
88 *px++ = gr_current_g;
89 *px++ = gr_current_b;
90 px++;
91 } else if (a > 0) {
92 *px = (*px * (255-a) + gr_current_r * a) / 255;
93 ++px;
94 *px = (*px * (255-a) + gr_current_g * a) / 255;
95 ++px;
96 *px = (*px * (255-a) + gr_current_b * a) / 255;
97 ++px;
98 ++px;
99 } else {
100 px += 4;
101 }
102 }
103 src_p += src_row_bytes;
104 dst_p += dst_row_bytes;
105 }
106}
107
108
109void gr_text(int x, int y, const char *s, int bold)
110{
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800111 GRFont *font = gr_font;
112 unsigned off;
113
Doug Zongker16f97c32014-03-06 16:16:05 -0800114 if (!font->texture) return;
115 if (gr_current_a == 0) return;
Doug Zongker55a36ac2013-03-04 15:49:02 -0800116
Doug Zongker6fd59ac2013-03-06 15:01:11 -0800117 bold = bold && (font->texture->height != font->cheight);
118
Doug Zongkerc560a672012-12-18 16:31:27 -0800119 x += overscan_offset_x;
120 y += overscan_offset_y;
121
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800122 while((off = *s++)) {
123 off -= 32;
Doug Zongker16f97c32014-03-06 16:16:05 -0800124 if (outside(x, y) || outside(x+font->cwidth-1, y+font->cheight-1)) break;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800125 if (off < 96) {
Doug Zongker16f97c32014-03-06 16:16:05 -0800126
127 unsigned char* src_p = font->texture->data + (off * font->cwidth) +
128 (bold ? font->cheight * font->texture->row_bytes : 0);
129 unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes;
130
131 text_blend(src_p, font->texture->row_bytes,
132 dst_p, gr_draw->row_bytes,
133 font->cwidth, font->cheight);
134
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800135 }
136 x += font->cwidth;
137 }
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800138}
139
Doug Zongker16f97c32014-03-06 16:16:05 -0800140void gr_texticon(int x, int y, GRSurface* icon) {
141 if (icon == NULL) return;
142
143 if (icon->pixel_bytes != 1) {
144 printf("gr_texticon: source has wrong format\n");
Doug Zongker52eeea4f2012-09-04 14:28:25 -0700145 return;
146 }
Doug Zongker02ec6b82012-08-22 17:26:40 -0700147
Doug Zongkerc560a672012-12-18 16:31:27 -0800148 x += overscan_offset_x;
149 y += overscan_offset_y;
150
Doug Zongker16f97c32014-03-06 16:16:05 -0800151 if (outside(x, y) || outside(x+icon->width-1, y+icon->height-1)) return;
Doug Zongker02ec6b82012-08-22 17:26:40 -0700152
Doug Zongker16f97c32014-03-06 16:16:05 -0800153 unsigned char* src_p = icon->data;
154 unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes;
Doug Zongker02ec6b82012-08-22 17:26:40 -0700155
Doug Zongker16f97c32014-03-06 16:16:05 -0800156 text_blend(src_p, icon->row_bytes,
157 dst_p, gr_draw->row_bytes,
158 icon->width, icon->height);
159}
160
161void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
162{
163 gr_current_r = r;
164 gr_current_g = g;
165 gr_current_b = b;
166 gr_current_a = a;
167}
168
169void gr_clear()
170{
171 if (gr_current_r == gr_current_g &&
172 gr_current_r == gr_current_b) {
173 memset(gr_draw->data, gr_current_r, gr_draw->height * gr_draw->row_bytes);
174 } else {
175 int x, y;
176 unsigned char* px = gr_draw->data;
177 for (y = 0; y < gr_draw->height; ++y) {
178 for (x = 0; x < gr_draw->width; ++x) {
179 *px++ = gr_current_r;
180 *px++ = gr_current_g;
181 *px++ = gr_current_b;
182 px++;
183 }
184 px += gr_draw->row_bytes - (gr_draw->width * gr_draw->pixel_bytes);
185 }
186 }
Doug Zongker02ec6b82012-08-22 17:26:40 -0700187}
188
Doug Zongkerc560a672012-12-18 16:31:27 -0800189void gr_fill(int x1, int y1, int x2, int y2)
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800190{
Doug Zongkerc560a672012-12-18 16:31:27 -0800191 x1 += overscan_offset_x;
192 y1 += overscan_offset_y;
193
194 x2 += overscan_offset_x;
195 y2 += overscan_offset_y;
196
Doug Zongker16f97c32014-03-06 16:16:05 -0800197 if (outside(x1, y1) || outside(x2-1, y2-1)) return;
198
199 unsigned char* p = gr_draw->data + y1 * gr_draw->row_bytes + x1 * gr_draw->pixel_bytes;
200 if (gr_current_a == 255) {
201 int x, y;
202 for (y = y1; y < y2; ++y) {
203 unsigned char* px = p;
204 for (x = x1; x < x2; ++x) {
205 *px++ = gr_current_r;
206 *px++ = gr_current_g;
207 *px++ = gr_current_b;
208 px++;
209 }
210 p += gr_draw->row_bytes;
211 }
212 } else if (gr_current_a > 0) {
213 int x, y;
214 for (y = y1; y < y2; ++y) {
215 unsigned char* px = p;
216 for (x = x1; x < x2; ++x) {
217 *px = (*px * (255-gr_current_a) + gr_current_r * gr_current_a) / 255;
218 ++px;
219 *px = (*px * (255-gr_current_a) + gr_current_g * gr_current_a) / 255;
220 ++px;
221 *px = (*px * (255-gr_current_a) + gr_current_b * gr_current_a) / 255;
222 ++px;
223 ++px;
224 }
225 p += gr_draw->row_bytes;
226 }
227 }
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800228}
229
Doug Zongker16f97c32014-03-06 16:16:05 -0800230void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
231 if (source == NULL) return;
232
233 if (gr_draw->pixel_bytes != source->pixel_bytes) {
234 printf("gr_blit: source has wrong format\n");
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800235 return;
236 }
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800237
Doug Zongkerc560a672012-12-18 16:31:27 -0800238 dx += overscan_offset_x;
239 dy += overscan_offset_y;
240
Doug Zongker16f97c32014-03-06 16:16:05 -0800241 if (outside(dx, dy) || outside(dx+w-1, dy+h-1)) return;
242
243 unsigned char* src_p = source->data + sy*source->row_bytes + sx*source->pixel_bytes;
244 unsigned char* dst_p = gr_draw->data + dy*gr_draw->row_bytes + dx*gr_draw->pixel_bytes;
245
246 int i;
247 for (i = 0; i < h; ++i) {
248 memcpy(dst_p, src_p, w * source->pixel_bytes);
249 src_p += source->row_bytes;
250 dst_p += gr_draw->row_bytes;
251 }
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800252}
253
Doug Zongker16f97c32014-03-06 16:16:05 -0800254unsigned int gr_get_width(GRSurface* surface) {
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800255 if (surface == NULL) {
256 return 0;
257 }
Doug Zongker16f97c32014-03-06 16:16:05 -0800258 return surface->width;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800259}
260
Doug Zongker16f97c32014-03-06 16:16:05 -0800261unsigned int gr_get_height(GRSurface* surface) {
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800262 if (surface == NULL) {
263 return 0;
264 }
Doug Zongker16f97c32014-03-06 16:16:05 -0800265 return surface->height;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800266}
267
268static void gr_init_font(void)
269{
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800270 gr_font = calloc(sizeof(*gr_font), 1);
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800271
Doug Zongkera418aa72014-03-17 12:10:02 -0700272 int res = res_create_alpha_surface("font", &(gr_font->texture));
Doug Zongker6fd59ac2013-03-06 15:01:11 -0800273 if (res == 0) {
274 // The font image should be a 96x2 array of character images. The
275 // columns are the printable ASCII characters 0x20 - 0x7f. The
276 // top row is regular text; the bottom row is bold.
277 gr_font->cwidth = gr_font->texture->width / 96;
278 gr_font->cheight = gr_font->texture->height / 2;
279 } else {
Doug Zongker55a36ac2013-03-04 15:49:02 -0800280 printf("failed to read font: res=%d\n", res);
Doug Zongker6fd59ac2013-03-06 15:01:11 -0800281
282 // fall back to the compiled-in font.
283 gr_font->texture = malloc(sizeof(*gr_font->texture));
284 gr_font->texture->width = font.width;
285 gr_font->texture->height = font.height;
Doug Zongker16f97c32014-03-06 16:16:05 -0800286 gr_font->texture->row_bytes = font.width;
287 gr_font->texture->pixel_bytes = 1;
Doug Zongker6fd59ac2013-03-06 15:01:11 -0800288
289 unsigned char* bits = malloc(font.width * font.height);
290 gr_font->texture->data = (void*) bits;
291
292 unsigned char data;
293 unsigned char* in = font.rundata;
294 while((data = *in++)) {
295 memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
296 bits += (data & 0x7f);
297 }
298
299 gr_font->cwidth = font.cwidth;
300 gr_font->cheight = font.cheight;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800301 }
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800302}
303
Doug Zongker16f97c32014-03-06 16:16:05 -0800304#if 0
305// Exercises many of the gr_*() functions; useful for testing.
306static void gr_test() {
307 GRSurface** images;
308 int frames;
309 int result = res_create_multi_surface("icon_installing", &frames, &images);
310 if (result < 0) {
311 printf("create surface %d\n", result);
312 gr_exit();
313 return;
314 }
315
316 time_t start = time(NULL);
317 int x;
318 for (x = 0; x <= 1200; ++x) {
319 if (x < 400) {
320 gr_color(0, 0, 0, 255);
321 } else {
322 gr_color(0, (x-400)%128, 0, 255);
323 }
324 gr_clear();
325
326 gr_color(255, 0, 0, 255);
327 gr_surface frame = images[x%frames];
328 gr_blit(frame, 0, 0, frame->width, frame->height, x, 0);
329
330 gr_color(255, 0, 0, 128);
331 gr_fill(400, 150, 600, 350);
332
333 gr_color(255, 255, 255, 255);
334 gr_text(500, 225, "hello, world!", 0);
335 gr_color(255, 255, 0, 128);
336 gr_text(300+x, 275, "pack my box with five dozen liquor jugs", 1);
337
338 gr_color(0, 0, 255, 128);
339 gr_fill(gr_draw->width - 200 - x, 300, gr_draw->width - x, 500);
340
Doug Zongker5290f202014-03-11 13:22:04 -0700341 gr_draw = gr_backend->flip(gr_backend);
Doug Zongker16f97c32014-03-06 16:16:05 -0800342 }
343 printf("getting end time\n");
344 time_t end = time(NULL);
345 printf("got end time\n");
346 printf("start %ld end %ld\n", (long)start, (long)end);
347 if (end > start) {
348 printf("%.2f fps\n", ((double)x) / (end-start));
349 }
350}
351#endif
352
Doug Zongker5290f202014-03-11 13:22:04 -0700353void gr_flip() {
354 gr_draw = gr_backend->flip(gr_backend);
355}
356
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800357int gr_init(void)
358{
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800359 gr_init_font();
Doug Zongker16f97c32014-03-06 16:16:05 -0800360
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800361 gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
362 if (gr_vt_fd < 0) {
363 // This is non-fatal; post-Cupcake kernels don't have tty0.
364 perror("can't open /dev/tty0");
365 } else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
366 // However, if we do open tty0, we expect the ioctl to work.
367 perror("failed KDSETMODE to KD_GRAPHICS on tty0");
368 gr_exit();
369 return -1;
370 }
371
Doug Zongker5290f202014-03-11 13:22:04 -0700372 gr_backend = open_fbdev();
373 gr_draw = gr_backend->init(gr_backend);
374 if (gr_draw == NULL) {
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800375 return -1;
376 }
377
Doug Zongker5290f202014-03-11 13:22:04 -0700378 overscan_offset_x = gr_draw->width * overscan_percent / 100;
379 overscan_offset_y = gr_draw->height * overscan_percent / 100;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800380
Doug Zongker16f97c32014-03-06 16:16:05 -0800381 gr_flip();
382 gr_flip();
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800383
384 return 0;
385}
386
387void gr_exit(void)
388{
Doug Zongker5290f202014-03-11 13:22:04 -0700389 gr_backend->exit(gr_backend);
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800390
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800391 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT);
392 close(gr_vt_fd);
393 gr_vt_fd = -1;
394}
395
396int gr_fb_width(void)
397{
Doug Zongker16f97c32014-03-06 16:16:05 -0800398 return gr_draw->width - 2*overscan_offset_x;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800399}
400
401int gr_fb_height(void)
402{
Doug Zongker16f97c32014-03-06 16:16:05 -0800403 return gr_draw->height - 2*overscan_offset_y;
The Android Open Source Projectc24a8e62009-03-03 19:28:42 -0800404}
Dima Zavin4daf48a2011-08-30 11:59:20 -0700405
406void gr_fb_blank(bool blank)
407{
Doug Zongker5290f202014-03-11 13:22:04 -0700408 gr_backend->blank(gr_backend, blank);
Dima Zavin4daf48a2011-08-30 11:59:20 -0700409}