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 "font_10x18.h" 27 #include "graphics_adf.h" 28 #include "graphics_drm.h" 29 #include "graphics_fbdev.h" 30 #include "minui/minui.h" 31 32 static GRFont* gr_font = NULL; 33 static MinuiBackend* gr_backend = nullptr; 34 35 static int overscan_percent = OVERSCAN_PERCENT; 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 static GRSurface* gr_draw = NULL; 43 static GRRotation rotation = ROTATION_NONE; 44 45 static bool outside(int x, int y) { 46 return x < 0 || x >= (rotation % 2 ? gr_draw->height : gr_draw->width) || y < 0 || 47 y >= (rotation % 2 ? gr_draw->width : gr_draw->height); 48 } 49 50 const GRFont* gr_sys_font() { 51 return gr_font; 52 } 53 54 int gr_measure(const GRFont* font, const char* s) { 55 return font->char_width * strlen(s); 56 } 57 58 void gr_font_size(const GRFont* font, int* x, int* y) { 59 *x = font->char_width; 60 *y = font->char_height; 61 } 62 63 // Blends gr_current onto pix value, assumes alpha as most significant byte. 64 static inline uint32_t pixel_blend(uint8_t alpha, uint32_t pix) { 65 if (alpha == 255) return gr_current; 66 if (alpha == 0) return pix; 67 uint32_t pix_r = pix & 0xff; 68 uint32_t pix_g = pix & 0xff00; 69 uint32_t pix_b = pix & 0xff0000; 70 uint32_t cur_r = gr_current & 0xff; 71 uint32_t cur_g = gr_current & 0xff00; 72 uint32_t cur_b = gr_current & 0xff0000; 73 74 uint32_t out_r = (pix_r * (255 - alpha) + cur_r * alpha) / 255; 75 uint32_t out_g = (pix_g * (255 - alpha) + cur_g * alpha) / 255; 76 uint32_t out_b = (pix_b * (255 - alpha) + cur_b * alpha) / 255; 77 78 return (out_r & 0xff) | (out_g & 0xff00) | (out_b & 0xff0000) | (gr_current & 0xff000000); 79 } 80 81 // increments pixel pointer right, with current rotation. 82 static void incr_x(uint32_t** p, int row_pixels) { 83 if (rotation % 2) { 84 *p = *p + (rotation == 1 ? 1 : -1) * row_pixels; 85 } else { 86 *p = *p + (rotation ? -1 : 1); 87 } 88 } 89 90 // increments pixel pointer down, with current rotation. 91 static void incr_y(uint32_t** p, int row_pixels) { 92 if (rotation % 2) { 93 *p = *p + (rotation == 1 ? -1 : 1); 94 } else { 95 *p = *p + (rotation ? -1 : 1) * row_pixels; 96 } 97 } 98 99 // returns pixel pointer at given coordinates with rotation adjustment. 100 static uint32_t* pixel_at(GRSurface* surf, int x, int y, int row_pixels) { 101 switch (rotation) { 102 case ROTATION_NONE: 103 return reinterpret_cast<uint32_t*>(surf->data) + y * row_pixels + x; 104 case ROTATION_RIGHT: 105 return reinterpret_cast<uint32_t*>(surf->data) + x * row_pixels + (surf->width - y); 106 case ROTATION_DOWN: 107 return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - y) * row_pixels + 108 (surf->width - 1 - x); 109 case ROTATION_LEFT: 110 return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - x) * row_pixels + y; 111 default: 112 printf("invalid rotation %d", rotation); 113 } 114 return nullptr; 115 } 116 117 static void text_blend(uint8_t* src_p, int src_row_bytes, uint32_t* dst_p, int dst_row_pixels, 118 int width, int height) { 119 uint8_t alpha_current = static_cast<uint8_t>((alpha_mask & gr_current) >> 24); 120 for (int j = 0; j < height; ++j) { 121 uint8_t* sx = src_p; 122 uint32_t* px = dst_p; 123 for (int i = 0; i < width; ++i, incr_x(&px, dst_row_pixels)) { 124 uint8_t a = *sx++; 125 if (alpha_current < 255) a = (static_cast<uint32_t>(a) * alpha_current) / 255; 126 *px = pixel_blend(a, *px); 127 } 128 src_p += src_row_bytes; 129 incr_y(&dst_p, dst_row_pixels); 130 } 131 } 132 133 void gr_text(const GRFont* font, int x, int y, const char* s, bool bold) { 134 if (!font || !font->texture || (gr_current & alpha_mask) == 0) return; 135 136 if (font->texture->pixel_bytes != 1) { 137 printf("gr_text: font has wrong format\n"); 138 return; 139 } 140 141 bold = bold && (font->texture->height != font->char_height); 142 143 x += overscan_offset_x; 144 y += overscan_offset_y; 145 146 unsigned char ch; 147 while ((ch = *s++)) { 148 if (outside(x, y) || outside(x + font->char_width - 1, y + font->char_height - 1)) break; 149 150 if (ch < ' ' || ch > '~') { 151 ch = '?'; 152 } 153 154 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes; 155 uint8_t* src_p = font->texture->data + ((ch - ' ') * font->char_width) + 156 (bold ? font->char_height * font->texture->row_bytes : 0); 157 uint32_t* dst_p = pixel_at(gr_draw, x, y, row_pixels); 158 159 text_blend(src_p, font->texture->row_bytes, dst_p, row_pixels, font->char_width, 160 font->char_height); 161 162 x += font->char_width; 163 } 164 } 165 166 void gr_texticon(int x, int y, GRSurface* icon) { 167 if (icon == NULL) return; 168 169 if (icon->pixel_bytes != 1) { 170 printf("gr_texticon: source has wrong format\n"); 171 return; 172 } 173 174 x += overscan_offset_x; 175 y += overscan_offset_y; 176 177 if (outside(x, y) || outside(x + icon->width - 1, y + icon->height - 1)) return; 178 179 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes; 180 uint8_t* src_p = icon->data; 181 uint32_t* dst_p = pixel_at(gr_draw, x, y, row_pixels); 182 183 text_blend(src_p, icon->row_bytes, dst_p, row_pixels, icon->width, icon->height); 184 } 185 186 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) { 187 uint32_t r32 = r, g32 = g, b32 = b, a32 = a; 188 #if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA) 189 gr_current = (a32 << 24) | (r32 << 16) | (g32 << 8) | b32; 190 #else 191 gr_current = (a32 << 24) | (b32 << 16) | (g32 << 8) | r32; 192 #endif 193 } 194 195 void gr_clear() { 196 if ((gr_current & 0xff) == ((gr_current >> 8) & 0xff) && 197 (gr_current & 0xff) == ((gr_current >> 16) & 0xff) && 198 (gr_current & 0xff) == ((gr_current >> 24) & 0xff) && 199 gr_draw->row_bytes == gr_draw->width * gr_draw->pixel_bytes) { 200 memset(gr_draw->data, gr_current & 0xff, gr_draw->height * gr_draw->row_bytes); 201 } else { 202 uint32_t* px = reinterpret_cast<uint32_t*>(gr_draw->data); 203 int row_diff = gr_draw->row_bytes / gr_draw->pixel_bytes - gr_draw->width; 204 for (int y = 0; y < gr_draw->height; ++y) { 205 for (int x = 0; x < gr_draw->width; ++x) { 206 *px++ = gr_current; 207 } 208 px += row_diff; 209 } 210 } 211 } 212 213 void gr_fill(int x1, int y1, int x2, int y2) { 214 x1 += overscan_offset_x; 215 y1 += overscan_offset_y; 216 217 x2 += overscan_offset_x; 218 y2 += overscan_offset_y; 219 220 if (outside(x1, y1) || outside(x2 - 1, y2 - 1)) return; 221 222 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes; 223 uint32_t* p = pixel_at(gr_draw, x1, y1, row_pixels); 224 uint8_t alpha = static_cast<uint8_t>(((gr_current & alpha_mask) >> 24)); 225 if (alpha > 0) { 226 for (int y = y1; y < y2; ++y) { 227 uint32_t* px = p; 228 for (int x = x1; x < x2; ++x) { 229 *px = pixel_blend(alpha, *px); 230 incr_x(&px, row_pixels); 231 } 232 incr_y(&p, row_pixels); 233 } 234 } 235 } 236 237 void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) { 238 if (source == NULL) return; 239 240 if (gr_draw->pixel_bytes != source->pixel_bytes) { 241 printf("gr_blit: source has wrong format\n"); 242 return; 243 } 244 245 dx += overscan_offset_x; 246 dy += overscan_offset_y; 247 248 if (outside(dx, dy) || outside(dx + w - 1, dy + h - 1)) return; 249 250 if (rotation) { 251 int src_row_pixels = source->row_bytes / source->pixel_bytes; 252 int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes; 253 uint32_t* src_py = reinterpret_cast<uint32_t*>(source->data) + sy * source->row_bytes / 4 + sx; 254 uint32_t* dst_py = pixel_at(gr_draw, dx, dy, row_pixels); 255 256 for (int y = 0; y < h; y += 1) { 257 uint32_t* src_px = src_py; 258 uint32_t* dst_px = dst_py; 259 for (int x = 0; x < w; x += 1) { 260 *dst_px = *src_px++; 261 incr_x(&dst_px, row_pixels); 262 } 263 src_py += src_row_pixels; 264 incr_y(&dst_py, row_pixels); 265 } 266 } else { 267 unsigned char* src_p = source->data + sy * source->row_bytes + sx * source->pixel_bytes; 268 unsigned char* dst_p = gr_draw->data + dy * gr_draw->row_bytes + dx * gr_draw->pixel_bytes; 269 270 int i; 271 for (i = 0; i < h; ++i) { 272 memcpy(dst_p, src_p, w * source->pixel_bytes); 273 src_p += source->row_bytes; 274 dst_p += gr_draw->row_bytes; 275 } 276 } 277 } 278 279 unsigned int gr_get_width(GRSurface* surface) { 280 if (surface == NULL) { 281 return 0; 282 } 283 return surface->width; 284 } 285 286 unsigned int gr_get_height(GRSurface* surface) { 287 if (surface == NULL) { 288 return 0; 289 } 290 return surface->height; 291 } 292 293 int gr_init_font(const char* name, GRFont** dest) { 294 GRFont* font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font))); 295 if (font == nullptr) { 296 return -1; 297 } 298 299 int res = res_create_alpha_surface(name, &(font->texture)); 300 if (res < 0) { 301 free(font); 302 return res; 303 } 304 305 // The font image should be a 96x2 array of character images. The 306 // columns are the printable ASCII characters 0x20 - 0x7f. The 307 // top row is regular text; the bottom row is bold. 308 font->char_width = font->texture->width / 96; 309 font->char_height = font->texture->height / 2; 310 311 *dest = font; 312 313 return 0; 314 } 315 316 static void gr_init_font(void) { 317 int res = gr_init_font("font", &gr_font); 318 if (res == 0) { 319 return; 320 } 321 322 printf("failed to read font: res=%d\n", res); 323 324 // fall back to the compiled-in font. 325 gr_font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font))); 326 gr_font->texture = static_cast<GRSurface*>(malloc(sizeof(*gr_font->texture))); 327 gr_font->texture->width = font.width; 328 gr_font->texture->height = font.height; 329 gr_font->texture->row_bytes = font.width; 330 gr_font->texture->pixel_bytes = 1; 331 332 unsigned char* bits = static_cast<unsigned char*>(malloc(font.width * font.height)); 333 gr_font->texture->data = bits; 334 335 unsigned char data; 336 unsigned char* in = font.rundata; 337 while ((data = *in++)) { 338 memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f); 339 bits += (data & 0x7f); 340 } 341 342 gr_font->char_width = font.char_width; 343 gr_font->char_height = font.char_height; 344 } 345 346 void gr_flip() { 347 gr_draw = gr_backend->Flip(); 348 } 349 350 int gr_init() { 351 gr_init_font(); 352 353 auto backend = std::unique_ptr<MinuiBackend>{ std::make_unique<MinuiBackendAdf>() }; 354 gr_draw = backend->Init(); 355 356 if (!gr_draw) { 357 backend = std::make_unique<MinuiBackendDrm>(); 358 gr_draw = backend->Init(); 359 } 360 361 if (!gr_draw) { 362 backend = std::make_unique<MinuiBackendFbdev>(); 363 gr_draw = backend->Init(); 364 } 365 366 if (!gr_draw) { 367 return -1; 368 } 369 370 gr_backend = backend.release(); 371 372 overscan_offset_x = gr_draw->width * overscan_percent / 100; 373 overscan_offset_y = gr_draw->height * overscan_percent / 100; 374 375 gr_flip(); 376 gr_flip(); 377 378 gr_rotate(DEFAULT_ROTATION); 379 380 if (gr_draw->pixel_bytes != 4) { 381 printf("gr_init: Only 4-byte pixel formats supported\n"); 382 } 383 384 return 0; 385 } 386 387 void gr_exit() { 388 delete gr_backend; 389 } 390 391 int gr_fb_width() { 392 return rotation % 2 ? gr_draw->height - 2 * overscan_offset_y 393 : gr_draw->width - 2 * overscan_offset_x; 394 } 395 396 int gr_fb_height() { 397 return rotation % 2 ? gr_draw->width - 2 * overscan_offset_x 398 : gr_draw->height - 2 * overscan_offset_y; 399 } 400 401 void gr_fb_blank(bool blank) { 402 gr_backend->Blank(blank); 403 } 404 405 void gr_rotate(GRRotation rot) { 406 rotation = rot; 407 } 408
