90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/*
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* draw.c
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*
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* Code to print to the screen by mid-kid @CakesFW
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*/
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#include "draw.h"
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#include "screeninit.h"
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#include "fs.h"
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#include "memory.h"
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#include "font.h"
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static const struct fb {
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u8 *top_left;
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u8 *top_right;
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u8 *bottom;
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} *const fb = (struct fb *)0x23FFFE00;
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static inline int strlen(const char *string)
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{
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char *stringEnd = (char *)string;
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while(*stringEnd) stringEnd++;
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return stringEnd - string;
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}
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void clearScreens(void)
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{
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memset32(fb->top_left, 0, 0x46500);
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memset32(fb->top_right, 0, 0x46500);
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memset32(fb->bottom, 0, 0x38400);
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}
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void loadSplash(void)
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{
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initScreens();
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//Don't delay boot if no splash image is on the SD
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if(!(fileRead(fb->top_left, "/luma/splash.bin", 0x46500) +
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fileRead(fb->bottom, "/luma/splashbottom.bin", 0x38400)))
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{
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u64 i = 0x1400000;
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while(i--) __asm("mov r0, r0"); //Less Ghetto sleep func
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}
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}
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void drawCharacter(char character, int posX, int posY, u32 color)
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{
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u8 *const select = fb->top_left;
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for(int y = 0; y < 8; y++)
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{
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char charPos = font[character * 8 + y];
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for(int x = 7; x >= 0; x--)
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if ((charPos >> x) & 1)
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{
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int screenPos = (posX * SCREEN_TOP_HEIGHT * 3 + (SCREEN_TOP_HEIGHT - y - posY - 1) * 3) + (7 - x) * 3 * SCREEN_TOP_HEIGHT;
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select[screenPos] = color >> 16;
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select[screenPos + 1] = color >> 8;
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select[screenPos + 2] = color;
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}
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}
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}
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int drawString(const char *string, int posX, int posY, u32 color)
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{
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for(int i = 0, line_i = 0; i < strlen(string); i++, line_i++)
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{
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if(string[i] == '\n')
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{
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posY += SPACING_Y;
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line_i = 0;
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i++;
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}
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else if(line_i >= (SCREEN_TOP_WIDTH - posX) / SPACING_X)
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{
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// Make sure we never get out of the screen.
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posY += SPACING_Y;
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line_i = 2; //Little offset so we know the same string continues.
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if(string[i] == ' ') i++; //Spaces at the start look weird
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}
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drawCharacter(string[i], posX + line_i * SPACING_X, posY, color);
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}
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return posY;
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} |