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https://github.com/knightfox75/nds_nflib.git
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151db13cc0
- Creative Commons (except for CC0) shouldn't be used for code: https://creativecommons.org/faq/#can-i-apply-a-creative-commons-license-to-software MIT has the same spirit as the CC-BY license. - CC-BY has been retained for the assets included in the repository. - Also, the years were wrong, this library was started in 2009. - Make all examples use the CC0 license.
165 lines
3.6 KiB
C
165 lines
3.6 KiB
C
// SPDX-License-Identifier: CC0-1.0
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//
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// SPDX-FileContributor: NightFox & Co., 2009-2011
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/*
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-------------------------------------------------
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NightFox's Lib Template
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Ejemplo basico de BackBuffer en 16bits (modo BITMAP)
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con carga de archivos de imagen
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Requiere DevkitARM
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Requiere NightFox's Lib
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Codigo por NightFox
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http://www.nightfoxandco.com
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Inicio 10 de Octubre del 2009
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-------------------------------------------------
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*/
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/*
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-------------------------------------------------
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Includes
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-------------------------------------------------
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*/
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// Includes C
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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// Includes propietarios NDS
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#include <nds.h>
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// Includes librerias propias
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#include <nf_lib.h>
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/*
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-------------------------------------------------
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Main() - Bloque general del programa
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-------------------------------------------------
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*/
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int main(int argc, char **argv) {
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// Pantalla de espera inicializando NitroFS
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NF_Set2D(0, 0);
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NF_Set2D(1, 0);
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consoleDemoInit();
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printf("\n NitroFS init. Please wait.\n\n");
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printf(" Iniciando NitroFS,\n por favor, espere.\n\n");
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swiWaitForVBlank();
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// Define el ROOT e inicializa el sistema de archivos
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NF_SetRootFolder("NITROFS"); // Define la carpeta ROOT para usar NITROFS
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// Inicializa el motor 2D en modo BITMAP
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NF_Set2D(0, 5); // Modo 2D_5 en ambas pantallas
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NF_Set2D(1, 5);
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// Inicializa los fondos en modo "BITMAP"
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NF_InitBitmapBgSys(0, 1);
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NF_InitBitmapBgSys(1, 1);
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// Inicializa los buffers para guardar fondos en formato BITMAP
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NF_Init16bitsBgBuffers();
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// Inicializa el BackBuffer de 16 bits
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// Usalo solo una vez antes de habilitarlo
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NF_Init16bitsBackBuffer(1);
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// Habilita el backbuffer en la pantalla superior
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NF_Enable16bitsBackBuffer(1);
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// Carga el archivo BITMAP de imagen en formato RAW a la RAM
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NF_Load16bitsBg("bmp/bitmap16", 0);
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// Tranfiere la imagen a la VRAM de la pantalla superior
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NF_Copy16bitsBuffer(0, 0, 0);
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// Tranfiere la imagen al BackBuffer de la pantalla inferior
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NF_Copy16bitsBuffer(1, 1, 0);
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// Variables RGB
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u8 r = 0;
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u8 g = 0;
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u8 b = 0;
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// Calcula el valor RGB
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u16 rgb = 0;
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// Ventana
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s16 x = 0;
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s16 y = 0;
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s16 composite = 0;
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s16 square_x = 0;
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s16 square_y = 0;
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// Variables del control del touchpad
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u16 keys = 0;
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touchPosition touchscreen;
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while (1) {
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// Copia el original
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NF_Copy16bitsBuffer(1, 1, 0);
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// Lectura de posicion del stylus
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scanKeys(); // Lee el touchpad via Libnds
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touchRead(&touchscreen);
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keys = keysHeld(); // Verifica el estado del touchscreen
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if (keys & KEY_TOUCH) {
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square_x = (touchscreen.px - 32);
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square_y = (touchscreen.py - 32);
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}
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// Calcula la ventana
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if (square_x < 0) square_x = 0;
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if (square_x > 191) square_x = 191;
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if (square_y < 0) square_y = 0;
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if (square_y > 127) square_y = 127;
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// Rellena el buffer
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for (y = square_y; y < (square_y + 64); y ++) {
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for (x = square_x; x < (square_x + 64); x ++) {
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// Obten el color actual
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rgb = NF_16BITS_BACKBUFFER[1][((y << 8) + x)];
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r = (rgb & 0x1F);
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g = ((rgb >> 5) & 0x1F);
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b = ((rgb >> 10) & 0x1F);
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// Genera el equivalente a blanco y negro y sube el brillo 3 puntos
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composite = ((int)((r + g + b) / 3) + 3);
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if (composite > 31) composite = 31;
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// Reemplaza los valores RGB
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r = composite;
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g = composite;
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b = composite;
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// Calcula el valor RGB (Alpha + RGB555)
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rgb = ((r)|((g) << 5)|((b) << 10)|(BIT(15)));
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// Escribelos en el buffer
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NF_16BITS_BACKBUFFER[1][((y << 8) + x)] = rgb;
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}
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}
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// Copia el contenido del Backbuffer a la VRAM
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NF_Flip16bitsBackBuffer(1);
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// Sincronismo Vertical
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swiWaitForVBlank();
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}
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return 0;
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}
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