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rendertext.c
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rendertext.c
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#include <string.h>
#include <SDL.h>
#ifdef __MINGW32__
#include <ctype.h>
#endif
#include "rendertext.h"
#define CHAR_WIDTH 5
#define CHAR_HEIGHT 7
#define TEXTURE_HEIGHT (CHAR_HEIGHT * 1)
#define TEXTURE_WIDTH (CHAR_WIDTH * 0x60)
// Text Area origin => debug area
int xPos = 0;
int yPos = 0;
// font texture
SDL_Texture *fontTexture;
int textureInitialized = 0;
// *******************************************************************************************
// left trim string
//
char *ltrim(char *s)
{
while(isspace(*s)) s++;
return s;
}
// *******************************************************************************************
//
// Simple 5 x 7 Font
//
// *******************************************************************************************
static unsigned char fontdata[] = {
0x00, 0x00, 0x00, 0x00, 0x00, // 0x20 (space)
0x00, 0x00, 0x5F, 0x00, 0x00, // 0x21 '!'
0x00, 0x07, 0x00, 0x07, 0x00, // 0x22 '"'
0x14, 0x7F, 0x14, 0x7F, 0x14, // 0x23 '#'
0x24, 0x2A, 0x7F, 0x2A, 0x12, // 0x24 '$'
0x23, 0x13, 0x08, 0x64, 0x62, // 0x25 '%'
0x36, 0x49, 0x55, 0x22, 0x50, // 0x26 '&'
0x00, 0x05, 0x03, 0x00, 0x00, // 0x27 '''
0x00, 0x1C, 0x22, 0x41, 0x00, // 0x28 '('
0x00, 0x41, 0x22, 0x1C, 0x00, // 0x29 ')'
0x08, 0x2A, 0x1C, 0x2A, 0x08, // 0x2A '*'
0x08, 0x08, 0x3E, 0x08, 0x08, // 0x2B '+'
0x00, 0x50, 0x30, 0x00, 0x00, // 0x2C ','
0x08, 0x08, 0x08, 0x08, 0x08, // 0x2D '-'
0x00, 0x60, 0x60, 0x00, 0x00, // 0x2E '.'
0x20, 0x10, 0x08, 0x04, 0x02, // 0x2F '/'
0x3E, 0x51, 0x49, 0x45, 0x3E, // 0x30 '0'
0x00, 0x42, 0x7F, 0x40, 0x00, // 0x31 '1'
0x42, 0x61, 0x51, 0x49, 0x46, // 0x32 '2'
0x21, 0x41, 0x45, 0x4B, 0x31, // 0x33 '3'
0x18, 0x14, 0x12, 0x7F, 0x10, // 0x34 '4'
0x27, 0x45, 0x45, 0x45, 0x39, // 0x35 '5'
0x3C, 0x4A, 0x49, 0x49, 0x30, // 0x36 '6'
0x01, 0x71, 0x09, 0x05, 0x03, // 0x37 '7'
0x36, 0x49, 0x49, 0x49, 0x36, // 0x38 '8'
0x06, 0x49, 0x49, 0x29, 0x1E, // 0x39 '9'
0x00, 0x36, 0x36, 0x00, 0x00, // 0x3A ':'
0x00, 0x56, 0x36, 0x00, 0x00, // 0x3B ';'
0x00, 0x08, 0x14, 0x22, 0x41, // 0x3C '<'
0x14, 0x14, 0x14, 0x14, 0x14, // 0x3D '='
0x41, 0x22, 0x14, 0x08, 0x00, // 0x3E '>'
0x02, 0x01, 0x51, 0x09, 0x06, // 0x3F '?'
0x32, 0x49, 0x79, 0x41, 0x3E, // 0x40 '@'
0x7E, 0x11, 0x11, 0x11, 0x7E, // 0x41 'A'
0x7F, 0x49, 0x49, 0x49, 0x36, // 0x42 'B'
0x3E, 0x41, 0x41, 0x41, 0x22, // 0x43 'C'
0x7F, 0x41, 0x41, 0x22, 0x1C, // 0x44 'D'
0x7F, 0x49, 0x49, 0x49, 0x41, // 0x45 'E'
0x7F, 0x09, 0x09, 0x01, 0x01, // 0x46 'F'
0x3E, 0x41, 0x41, 0x51, 0x32, // 0x47 'G'
0x7F, 0x08, 0x08, 0x08, 0x7F, // 0x48 'H'
0x00, 0x41, 0x7F, 0x41, 0x00, // 0x49 'I'
0x20, 0x40, 0x41, 0x3F, 0x01, // 0x4A 'J'
0x7F, 0x08, 0x14, 0x22, 0x41, // 0x4B 'K'
0x7F, 0x40, 0x40, 0x40, 0x40, // 0x4C 'L'
0x7F, 0x02, 0x04, 0x02, 0x7F, // 0x4D 'M'
0x7F, 0x04, 0x08, 0x10, 0x7F, // 0x4E 'N'
0x3E, 0x41, 0x41, 0x41, 0x3E, // 0x4F 'O'
0x7F, 0x09, 0x09, 0x09, 0x06, // 0x50 'P'
0x3E, 0x41, 0x51, 0x21, 0x5E, // 0x51 'Q'
0x7F, 0x09, 0x19, 0x29, 0x46, // 0x52 'R'
0x46, 0x49, 0x49, 0x49, 0x31, // 0x53 'S'
0x01, 0x01, 0x7F, 0x01, 0x01, // 0x54 'T'
0x3F, 0x40, 0x40, 0x40, 0x3F, // 0x55 'U'
0x1F, 0x20, 0x40, 0x20, 0x1F, // 0x56 'V'
0x7F, 0x20, 0x18, 0x20, 0x7F, // 0x57 'W'
0x63, 0x14, 0x08, 0x14, 0x63, // 0x58 'X'
0x03, 0x04, 0x78, 0x04, 0x03, // 0x59 'Y'
0x61, 0x51, 0x49, 0x45, 0x43, // 0x5A 'Z'
0x00, 0x00, 0x7F, 0x41, 0x41, // 0x5B '['
0x02, 0x04, 0x08, 0x10, 0x20, // 0x5C '\'
0x41, 0x41, 0x7F, 0x00, 0x00, // 0x5D ']'
0x04, 0x02, 0x01, 0x02, 0x04, // 0x5E '^'
0x40, 0x40, 0x40, 0x40, 0x40, // 0x5F '_'
0x00, 0x01, 0x02, 0x04, 0x00, // 0x60 '`'
0x20, 0x54, 0x54, 0x54, 0x78, // 0x61 'a'
0x7F, 0x48, 0x44, 0x44, 0x38, // 0x62 'b'
0x38, 0x44, 0x44, 0x44, 0x20, // 0x63 'c'
0x38, 0x44, 0x44, 0x48, 0x7F, // 0x64 'd'
0x38, 0x54, 0x54, 0x54, 0x18, // 0x65 'e'
0x08, 0x7E, 0x09, 0x01, 0x02, // 0x66 'f'
0x08, 0x14, 0x54, 0x54, 0x3C, // 0x67 'g'
0x7F, 0x08, 0x04, 0x04, 0x78, // 0x68 'h'
0x00, 0x44, 0x7D, 0x40, 0x00, // 0x69 'i'
0x20, 0x40, 0x44, 0x3D, 0x00, // 0x6A 'j'
0x00, 0x7F, 0x10, 0x28, 0x44, // 0x6B 'k'
0x00, 0x41, 0x7F, 0x40, 0x00, // 0x6C 'l'
0x7C, 0x04, 0x18, 0x04, 0x78, // 0x6D 'm'
0x7C, 0x08, 0x04, 0x04, 0x78, // 0x6E 'n'
0x38, 0x44, 0x44, 0x44, 0x38, // 0x6F 'o'
0x7C, 0x14, 0x14, 0x14, 0x08, // 0x70 'p'
0x08, 0x14, 0x14, 0x18, 0x7C, // 0x71 'q'
0x7C, 0x08, 0x04, 0x04, 0x08, // 0x72 'r'
0x48, 0x54, 0x54, 0x54, 0x20, // 0x73 's'
0x04, 0x3F, 0x44, 0x40, 0x20, // 0x74 't'
0x3C, 0x40, 0x40, 0x20, 0x7C, // 0x75 'u'
0x1C, 0x20, 0x40, 0x20, 0x1C, // 0x76 'v'
0x3C, 0x40, 0x30, 0x40, 0x3C, // 0x77 'w'
0x44, 0x28, 0x10, 0x28, 0x44, // 0x78 'x'
0x0C, 0x50, 0x50, 0x50, 0x3C, // 0x79 'y'
0x44, 0x64, 0x54, 0x4C, 0x44, // 0x7A 'z'
0x00, 0x08, 0x36, 0x41, 0x00, // 0x7B '{'
0x00, 0x00, 0x7F, 0x00, 0x00, // 0x7C '|'
0x00, 0x41, 0x36, 0x08, 0x00, // 0x7D '}'
0x08, 0x08, 0x2A, 0x1C, 0x08, // 0x7E ->'
0x08, 0x1C, 0x2A, 0x08, 0x08, // 0x7F <-'
};
// *******************************************************************************************
//
// Initialize charset
//
// *******************************************************************************************
void DEBUGInitChars(SDL_Renderer *renderer) {
uint16_t textureData[TEXTURE_WIDTH * TEXTURE_HEIGHT];
memset(textureData, 0, sizeof textureData);
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
fontTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA4444, SDL_TEXTUREACCESS_STATIC, TEXTURE_WIDTH, TEXTURE_HEIGHT);
for (int ch =0x00; ch<0x60; ch++){
int rcx = 0;
for (int x1 = 0; x1 < 5; x1++) {
int rcy = 0;
int pixData = fontdata[ch * 5 + x1];
while (pixData != 0) {
textureData[ch*CHAR_WIDTH + rcy*TEXTURE_WIDTH + rcx] = (pixData & 1) ? 0xFFFF : 0x0000;
pixData = pixData >> 1;
rcy++;
}
rcx++;
}
}
SDL_UpdateTexture(fontTexture, NULL, &textureData, TEXTURE_WIDTH*2);
textureInitialized = 1;
}
// *******************************************************************************************
//
// Write character
//
// *******************************************************************************************
void DEBUGWrite(SDL_Renderer *renderer, int x, int y, int ch, SDL_Color colour) {
if (!textureInitialized) {
DEBUGInitChars(renderer);
}
SDL_SetTextureColorMod(fontTexture, colour.r, colour.g, colour.b);
ch-=0x20;
SDL_Rect srcRect = {
ch* CHAR_WIDTH,
0,
CHAR_WIDTH,
CHAR_HEIGHT
};
SDL_Rect dstRect = {
x*(CHAR_WIDTH+1) + xPos,
y*(CHAR_HEIGHT+1) + yPos,
CHAR_WIDTH,
CHAR_HEIGHT
};
SDL_RenderCopy(renderer, fontTexture, &srcRect, &dstRect);
}
// *******************************************************************************************
//
// Write String
//
// *******************************************************************************************
void DEBUGString(SDL_Renderer *renderer, int x, int y, char *s, SDL_Color colour) {
while (*s != '\0') {
DEBUGWrite(renderer, x++, y, *s++, colour);
}
}