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141 lines
3.7 KiB
141 lines
3.7 KiB
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "oled.h"
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#include <SDL2/SDL.h>
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static SDL_Renderer *renderer = NULL;
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static SDL_Texture *texture = NULL;
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static SDL_Rect dstrect;
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#define ENV_OLED_FULLSCREEN "TREZOR_OLED_FULLSCREEN"
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#define ENV_OLED_SCALE "TREZOR_OLED_SCALE"
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static int emulatorFullscreen(void) {
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const char *variable = getenv(ENV_OLED_FULLSCREEN);
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if (!variable) {
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return 0;
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}
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return atoi(variable);
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}
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static int emulatorScale(void) {
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const char *variable = getenv(ENV_OLED_SCALE);
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if (!variable) {
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return 1;
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}
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int scale = atoi(variable);
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if (scale >= 1 && scale <= 16) {
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return scale;
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}
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return 1;
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}
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void oledInit(void) {
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if (SDL_Init(SDL_INIT_VIDEO) != 0) {
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fprintf(stderr, "Failed to initialize SDL: %s\n", SDL_GetError());
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exit(1);
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}
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atexit(SDL_Quit);
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int scale = emulatorScale();
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int fullscreen = emulatorFullscreen();
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SDL_Window *window = SDL_CreateWindow(
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"Trezor^emu", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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OLED_WIDTH * scale, OLED_HEIGHT * scale,
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fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
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if (window == NULL) {
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fprintf(stderr, "Failed to create window: %s\n", SDL_GetError());
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exit(1);
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}
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renderer = SDL_CreateRenderer(window, -1, 0);
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if (!renderer) {
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fprintf(stderr, "Failed to create renderer: %s\n", SDL_GetError());
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exit(1);
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}
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if (fullscreen) {
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SDL_DisplayMode current_mode;
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if (SDL_GetCurrentDisplayMode(0, ¤t_mode) != 0) {
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fprintf(stderr, "Failed to get current display mode: %s\n",
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SDL_GetError());
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exit(1);
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}
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dstrect.x = (current_mode.w - OLED_WIDTH * scale) / 2;
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dstrect.y = (current_mode.h - OLED_HEIGHT * scale) / 2;
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
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SDL_RenderClear(renderer);
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SDL_ShowCursor(SDL_DISABLE);
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} else {
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dstrect.x = 0;
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dstrect.y = 0;
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}
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dstrect.w = OLED_WIDTH * scale;
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dstrect.h = OLED_HEIGHT * scale;
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texture =
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SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888,
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SDL_TEXTUREACCESS_STREAMING, OLED_WIDTH, OLED_HEIGHT);
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oledClear();
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oledRefresh();
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}
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void oledRefresh(void) {
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/* Draw triangle in upper right corner */
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oledInvertDebugLink();
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const uint8_t *buffer = oledGetBuffer();
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static uint32_t data[OLED_HEIGHT][OLED_WIDTH];
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for (size_t i = 0; i < OLED_BUFSIZE; i++) {
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int x = (OLED_BUFSIZE - 1 - i) % OLED_WIDTH;
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int y = (OLED_BUFSIZE - 1 - i) / OLED_WIDTH * 8 + 7;
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for (uint8_t shift = 0; shift < 8; shift++, y--) {
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bool set = (buffer[i] >> shift) & 1;
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data[y][x] = set ? 0xFFFFFFFF : 0xFF000000;
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}
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}
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SDL_UpdateTexture(texture, NULL, data, OLED_WIDTH * sizeof(uint32_t));
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SDL_RenderCopy(renderer, texture, NULL, &dstrect);
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SDL_RenderPresent(renderer);
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/* Return it back */
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oledInvertDebugLink();
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}
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void emulatorPoll(void) {
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SDL_Event event;
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if (SDL_PollEvent(&event)) {
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if (event.type == SDL_QUIT) {
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exit(1);
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}
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}
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}
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