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 "graphics.h"
18
19 #include <stdint.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23
24 #include <memory>
25
26 #include <android-base/properties.h>
27
28 #include "graphics_adf.h"
29 #include "graphics_drm.h"
30 #include "graphics_fbdev.h"
31 #include "minui/minui.h"
32
33 static GRFont* gr_font = nullptr;
34 static MinuiBackend* gr_backend = nullptr;
35
36 static int overscan_offset_x = 0;
37 static int overscan_offset_y = 0;
38
39 static uint32_t gr_current = ~0;
40 static constexpr uint32_t alpha_mask = 0xff000000;
41
42 // gr_draw is owned by backends.
43 static GRSurface* gr_draw = nullptr;
44 static GRRotation rotation = GRRotation::NONE;
45 static PixelFormat pixel_format = PixelFormat::UNKNOWN;
46
outside(int x,int y)47 static bool outside(int x, int y) {
48 auto swapped = (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT);
49 return x < 0 || x >= (swapped ? gr_draw->height : gr_draw->width) || y < 0 ||
50 y >= (swapped ? gr_draw->width : gr_draw->height);
51 }
52
gr_sys_font()53 const GRFont* gr_sys_font() {
54 return gr_font;
55 }
56
gr_pixel_format()57 PixelFormat gr_pixel_format() {
58 return pixel_format;
59 }
60
gr_measure(const GRFont * font,const char * s)61 int gr_measure(const GRFont* font, const char* s) {
62 if (font == nullptr) {
63 return -1;
64 }
65
66 return font->char_width * strlen(s);
67 }
68
gr_font_size(const GRFont * font,int * x,int * y)69 int gr_font_size(const GRFont* font, int* x, int* y) {
70 if (font == nullptr) {
71 return -1;
72 }
73
74 *x = font->char_width;
75 *y = font->char_height;
76 return 0;
77 }
78
79 // Blends gr_current onto pix value, assumes alpha as most significant byte.
pixel_blend(uint8_t alpha,uint32_t pix)80 static inline uint32_t pixel_blend(uint8_t alpha, uint32_t pix) {
81 if (alpha == 255) return gr_current;
82 if (alpha == 0) return pix;
83 uint32_t pix_r = pix & 0xff;
84 uint32_t pix_g = pix & 0xff00;
85 uint32_t pix_b = pix & 0xff0000;
86 uint32_t cur_r = gr_current & 0xff;
87 uint32_t cur_g = gr_current & 0xff00;
88 uint32_t cur_b = gr_current & 0xff0000;
89
90 uint32_t out_r = (pix_r * (255 - alpha) + cur_r * alpha) / 255;
91 uint32_t out_g = (pix_g * (255 - alpha) + cur_g * alpha) / 255;
92 uint32_t out_b = (pix_b * (255 - alpha) + cur_b * alpha) / 255;
93
94 return (out_r & 0xff) | (out_g & 0xff00) | (out_b & 0xff0000) | (gr_current & 0xff000000);
95 }
96
97 // Increments pixel pointer right, with current rotation.
incr_x(uint32_t ** p,int row_pixels)98 static void incr_x(uint32_t** p, int row_pixels) {
99 if (rotation == GRRotation::LEFT) {
100 *p = *p - row_pixels;
101 } else if (rotation == GRRotation::RIGHT) {
102 *p = *p + row_pixels;
103 } else if (rotation == GRRotation::DOWN) {
104 *p = *p - 1;
105 } else { // GRRotation::NONE
106 *p = *p + 1;
107 }
108 }
109
110 // Increments pixel pointer down, with current rotation.
incr_y(uint32_t ** p,int row_pixels)111 static void incr_y(uint32_t** p, int row_pixels) {
112 if (rotation == GRRotation::LEFT) {
113 *p = *p + 1;
114 } else if (rotation == GRRotation::RIGHT) {
115 *p = *p - 1;
116 } else if (rotation == GRRotation::DOWN) {
117 *p = *p - row_pixels;
118 } else { // GRRotation::NONE
119 *p = *p + row_pixels;
120 }
121 }
122
123 // Returns pixel pointer at given coordinates with rotation adjustment.
PixelAt(GRSurface * surface,int x,int y,int row_pixels)124 static uint32_t* PixelAt(GRSurface* surface, int x, int y, int row_pixels) {
125 switch (rotation) {
126 case GRRotation::NONE:
127 return reinterpret_cast<uint32_t*>(surface->data()) + y * row_pixels + x;
128 case GRRotation::RIGHT:
129 return reinterpret_cast<uint32_t*>(surface->data()) + x * row_pixels + (surface->width - y);
130 case GRRotation::DOWN:
131 return reinterpret_cast<uint32_t*>(surface->data()) + (surface->height - 1 - y) * row_pixels +
132 (surface->width - 1 - x);
133 case GRRotation::LEFT:
134 return reinterpret_cast<uint32_t*>(surface->data()) + (surface->height - 1 - x) * row_pixels +
135 y;
136 default:
137 printf("invalid rotation %d", static_cast<int>(rotation));
138 }
139 return nullptr;
140 }
141
TextBlend(const uint8_t * src_p,int src_row_bytes,uint32_t * dst_p,int dst_row_pixels,int width,int height)142 static void TextBlend(const uint8_t* src_p, int src_row_bytes, uint32_t* dst_p, int dst_row_pixels,
143 int width, int height) {
144 uint8_t alpha_current = static_cast<uint8_t>((alpha_mask & gr_current) >> 24);
145 for (int j = 0; j < height; ++j) {
146 const uint8_t* sx = src_p;
147 uint32_t* px = dst_p;
148 for (int i = 0; i < width; ++i, incr_x(&px, dst_row_pixels)) {
149 uint8_t a = *sx++;
150 if (alpha_current < 255) a = (static_cast<uint32_t>(a) * alpha_current) / 255;
151 *px = pixel_blend(a, *px);
152 }
153 src_p += src_row_bytes;
154 incr_y(&dst_p, dst_row_pixels);
155 }
156 }
157
gr_text(const GRFont * font,int x,int y,const char * s,bool bold)158 void gr_text(const GRFont* font, int x, int y, const char* s, bool bold) {
159 if (!font || !font->texture || (gr_current & alpha_mask) == 0) return;
160
161 if (font->texture->pixel_bytes != 1) {
162 printf("gr_text: font has wrong format\n");
163 return;
164 }
165
166 bold = bold && (font->texture->height != font->char_height);
167
168 x += overscan_offset_x;
169 y += overscan_offset_y;
170
171 unsigned char ch;
172 while ((ch = *s++)) {
173 if (outside(x, y) || outside(x + font->char_width - 1, y + font->char_height - 1)) break;
174
175 if (ch < ' ' || ch > '~') {
176 ch = '?';
177 }
178
179 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
180 const uint8_t* src_p = font->texture->data() + ((ch - ' ') * font->char_width) +
181 (bold ? font->char_height * font->texture->row_bytes : 0);
182 uint32_t* dst_p = PixelAt(gr_draw, x, y, row_pixels);
183
184 TextBlend(src_p, font->texture->row_bytes, dst_p, row_pixels, font->char_width,
185 font->char_height);
186
187 x += font->char_width;
188 }
189 }
190
gr_texticon(int x,int y,const GRSurface * icon)191 void gr_texticon(int x, int y, const GRSurface* icon) {
192 if (icon == nullptr) return;
193
194 if (icon->pixel_bytes != 1) {
195 printf("gr_texticon: source has wrong format\n");
196 return;
197 }
198
199 x += overscan_offset_x;
200 y += overscan_offset_y;
201
202 if (outside(x, y) || outside(x + icon->width - 1, y + icon->height - 1)) return;
203
204 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
205 const uint8_t* src_p = icon->data();
206 uint32_t* dst_p = PixelAt(gr_draw, x, y, row_pixels);
207 TextBlend(src_p, icon->row_bytes, dst_p, row_pixels, icon->width, icon->height);
208 }
209
gr_color(unsigned char r,unsigned char g,unsigned char b,unsigned char a)210 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
211 uint32_t r32 = r, g32 = g, b32 = b, a32 = a;
212 if (pixel_format == PixelFormat::ARGB || pixel_format == PixelFormat::BGRA) {
213 gr_current = (a32 << 24) | (r32 << 16) | (g32 << 8) | b32;
214 } else {
215 gr_current = (a32 << 24) | (b32 << 16) | (g32 << 8) | r32;
216 }
217 }
218
gr_clear()219 void gr_clear() {
220 if ((gr_current & 0xff) == ((gr_current >> 8) & 0xff) &&
221 (gr_current & 0xff) == ((gr_current >> 16) & 0xff) &&
222 (gr_current & 0xff) == ((gr_current >> 24) & 0xff) &&
223 gr_draw->row_bytes == gr_draw->width * gr_draw->pixel_bytes) {
224 memset(gr_draw->data(), gr_current & 0xff, gr_draw->height * gr_draw->row_bytes);
225 } else {
226 uint32_t* px = reinterpret_cast<uint32_t*>(gr_draw->data());
227 int row_diff = gr_draw->row_bytes / gr_draw->pixel_bytes - gr_draw->width;
228 for (int y = 0; y < gr_draw->height; ++y) {
229 for (int x = 0; x < gr_draw->width; ++x) {
230 *px++ = gr_current;
231 }
232 px += row_diff;
233 }
234 }
235 }
236
gr_fill(int x1,int y1,int x2,int y2)237 void gr_fill(int x1, int y1, int x2, int y2) {
238 x1 += overscan_offset_x;
239 y1 += overscan_offset_y;
240
241 x2 += overscan_offset_x;
242 y2 += overscan_offset_y;
243
244 if (outside(x1, y1) || outside(x2 - 1, y2 - 1)) return;
245
246 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
247 uint32_t* p = PixelAt(gr_draw, x1, y1, row_pixels);
248 uint8_t alpha = static_cast<uint8_t>(((gr_current & alpha_mask) >> 24));
249 if (alpha > 0) {
250 for (int y = y1; y < y2; ++y) {
251 uint32_t* px = p;
252 for (int x = x1; x < x2; ++x) {
253 *px = pixel_blend(alpha, *px);
254 incr_x(&px, row_pixels);
255 }
256 incr_y(&p, row_pixels);
257 }
258 }
259 }
260
gr_blit(const GRSurface * source,int sx,int sy,int w,int h,int dx,int dy)261 void gr_blit(const GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
262 if (source == nullptr) return;
263
264 if (gr_draw->pixel_bytes != source->pixel_bytes) {
265 printf("gr_blit: source has wrong format\n");
266 return;
267 }
268
269 dx += overscan_offset_x;
270 dy += overscan_offset_y;
271
272 if (outside(dx, dy) || outside(dx + w - 1, dy + h - 1)) return;
273
274 if (rotation != GRRotation::NONE) {
275 int src_row_pixels = source->row_bytes / source->pixel_bytes;
276 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
277 const uint32_t* src_py =
278 reinterpret_cast<const uint32_t*>(source->data()) + sy * source->row_bytes / 4 + sx;
279 uint32_t* dst_py = PixelAt(gr_draw, dx, dy, row_pixels);
280
281 for (int y = 0; y < h; y += 1) {
282 const uint32_t* src_px = src_py;
283 uint32_t* dst_px = dst_py;
284 for (int x = 0; x < w; x += 1) {
285 *dst_px = *src_px++;
286 incr_x(&dst_px, row_pixels);
287 }
288 src_py += src_row_pixels;
289 incr_y(&dst_py, row_pixels);
290 }
291 } else {
292 const uint8_t* src_p = source->data() + sy * source->row_bytes + sx * source->pixel_bytes;
293 uint8_t* dst_p = gr_draw->data() + dy * gr_draw->row_bytes + dx * gr_draw->pixel_bytes;
294
295 for (int i = 0; i < h; ++i) {
296 memcpy(dst_p, src_p, w * source->pixel_bytes);
297 src_p += source->row_bytes;
298 dst_p += gr_draw->row_bytes;
299 }
300 }
301 }
302
gr_get_width(const GRSurface * surface)303 unsigned int gr_get_width(const GRSurface* surface) {
304 if (surface == nullptr) {
305 return 0;
306 }
307 return surface->width;
308 }
309
gr_get_height(const GRSurface * surface)310 unsigned int gr_get_height(const GRSurface* surface) {
311 if (surface == nullptr) {
312 return 0;
313 }
314 return surface->height;
315 }
316
gr_init_font(const char * name,GRFont ** dest)317 int gr_init_font(const char* name, GRFont** dest) {
318 GRFont* font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
319 if (font == nullptr) {
320 return -1;
321 }
322
323 int res = res_create_alpha_surface(name, &(font->texture));
324 if (res < 0) {
325 free(font);
326 return res;
327 }
328
329 // The font image should be a 96x2 array of character images. The
330 // columns are the printable ASCII characters 0x20 - 0x7f. The
331 // top row is regular text; the bottom row is bold.
332 font->char_width = font->texture->width / 96;
333 font->char_height = font->texture->height / 2;
334
335 *dest = font;
336
337 return 0;
338 }
339
gr_flip()340 void gr_flip() {
341 gr_draw = gr_backend->Flip();
342 }
343
gr_init()344 int gr_init() {
345 // pixel_format needs to be set before loading any resources or initializing backends.
346 std::string format = android::base::GetProperty("ro.minui.pixel_format", "");
347 if (format == "ABGR_8888") {
348 pixel_format = PixelFormat::ABGR;
349 } else if (format == "RGBX_8888") {
350 pixel_format = PixelFormat::RGBX;
351 } else if (format == "ARGB_8888") {
352 pixel_format = PixelFormat::ARGB;
353 } else if (format == "BGRA_8888") {
354 pixel_format = PixelFormat::BGRA;
355 } else {
356 pixel_format = PixelFormat::UNKNOWN;
357 }
358
359 int ret = gr_init_font("font", &gr_font);
360 if (ret != 0) {
361 printf("Failed to init font: %d, continuing graphic backend initialization without font file\n",
362 ret);
363 }
364
365 auto backend = std::unique_ptr<MinuiBackend>{ std::make_unique<MinuiBackendAdf>() };
366 gr_draw = backend->Init();
367
368 if (!gr_draw) {
369 backend = std::make_unique<MinuiBackendDrm>();
370 gr_draw = backend->Init();
371 }
372
373 if (!gr_draw) {
374 backend = std::make_unique<MinuiBackendFbdev>();
375 gr_draw = backend->Init();
376 }
377
378 if (!gr_draw) {
379 return -1;
380 }
381
382 gr_backend = backend.release();
383
384 int overscan_percent = android::base::GetIntProperty("ro.minui.overscan_percent", 0);
385 overscan_offset_x = gr_draw->width * overscan_percent / 100;
386 overscan_offset_y = gr_draw->height * overscan_percent / 100;
387
388 gr_flip();
389 gr_flip();
390 if (!gr_draw) {
391 printf("gr_init: gr_draw becomes nullptr after gr_flip\n");
392 return -1;
393 }
394
395 std::string rotation_str =
396 android::base::GetProperty("ro.minui.default_rotation", "ROTATION_NONE");
397 if (rotation_str == "ROTATION_RIGHT") {
398 gr_rotate(GRRotation::RIGHT);
399 } else if (rotation_str == "ROTATION_DOWN") {
400 gr_rotate(GRRotation::DOWN);
401 } else if (rotation_str == "ROTATION_LEFT") {
402 gr_rotate(GRRotation::LEFT);
403 } else { // "ROTATION_NONE" or unknown string
404 gr_rotate(GRRotation::NONE);
405 }
406
407 if (gr_draw->pixel_bytes != 4) {
408 printf("gr_init: Only 4-byte pixel formats supported\n");
409 }
410
411 return 0;
412 }
413
gr_exit()414 void gr_exit() {
415 delete gr_backend;
416 gr_backend = nullptr;
417
418 delete gr_font;
419 gr_font = nullptr;
420 }
421
gr_fb_width()422 int gr_fb_width() {
423 return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
424 ? gr_draw->height - 2 * overscan_offset_y
425 : gr_draw->width - 2 * overscan_offset_x;
426 }
427
gr_fb_height()428 int gr_fb_height() {
429 return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
430 ? gr_draw->width - 2 * overscan_offset_x
431 : gr_draw->height - 2 * overscan_offset_y;
432 }
433
gr_fb_blank(bool blank)434 void gr_fb_blank(bool blank) {
435 gr_backend->Blank(blank);
436 }
437
gr_rotate(GRRotation rot)438 void gr_rotate(GRRotation rot) {
439 rotation = rot;
440 }
441