106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "imports.h"
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#include "font_bin.h"
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#define FRAMEBUFFER_ADDRESS (0x14000000+0x38C0000)
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#define FRAMEBUFFER_STRIDE (0xE00)
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#define FRAMEBUFFER_STRIDE_WORDS (FRAMEBUFFER_STRIDE >> 2)
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#define CHAR_SIZE_X (8)
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#define CHAR_SIZE_Y (8)
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static const u8 *launch_image_tga = (const u8*)0x27000000;
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u32* const framebuffer = (u32*)FRAMEBUFFER_ADDRESS;
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void drawSplashScreen(void)
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{
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// check if it is an unmapped RGB tga
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if(*(u32*)launch_image_tga != 0x00000200)
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return;
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int i;
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for(i = 0; i < (896 * 504); i++)
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{
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u32 pixel;
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u32 pixelOffset = 0x12 + i * 2;
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// access only 4 byte aligned data as the file is in code section
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u32 dualPixel = *(u32*)(launch_image_tga + (pixelOffset & ~3));
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if((pixelOffset & 3) == 0)
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{
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pixel = ((dualPixel >> 24) & 0xFF) | (((dualPixel >> 16) & 0xFF) << 8);
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}
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else
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{
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pixel = ((dualPixel >> 8) & 0xFF) | ((dualPixel & 0xFF) << 8);
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}
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framebuffer[i] = (((pixel >> 10) & 0x1F) << (3 + 24)) | (((pixel >> 5) & 0x1F) << (3 + 16)) | ((pixel & 0x1F) << (3 + 8)) | 0xFF;
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}
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}
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void clearScreen(u32 color)
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{
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int i;
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for(i = 0; i < 896 * 504; i++)
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{
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framebuffer[i] = color;
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}
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}
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void drawCharacter(char c, int x, int y)
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{
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if(c < 32)return;
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c -= 32;
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u8* charData = (u8*)&font_bin[(CHAR_SIZE_X * CHAR_SIZE_Y * c) / 8];
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u32* fb = &framebuffer[x + y * FRAMEBUFFER_STRIDE_WORDS];
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int i, j;
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for(i = 0; i < CHAR_SIZE_Y; i++)
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{
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u8 v= *(charData++);
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for(j = 0; j < CHAR_SIZE_X; j++)
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{
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if(v & 1) *fb = 0x00000000;
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else *fb = 0xFFFFFFFF;
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v >>= 1;
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fb++;
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}
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fb += FRAMEBUFFER_STRIDE_WORDS - CHAR_SIZE_X;
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}
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}
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void drawString(char* str, int x, int y)
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{
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if(!str) return;
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int k;
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int dx = 0, dy = 0;
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for(k = 0; str[k]; k++)
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{
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if(str[k] >= 32 && str[k] < 128) drawCharacter(str[k], x + dx, y + dy);
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dx += 8;
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if(str[k] == '\n')
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{
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dx = 0;
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dy -= 8;
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}
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}
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}
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void print(int x, int y, const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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static char buffer[0x100];
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vsnprintf(buffer, 0xFF, format, args);
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drawString(buffer, x, y);
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va_end(args);
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}
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