libg15render
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#include "libg15render.h"
Go to the source code of this file.
Functions | |
int | calc_ttf_centering (FT_Face face, char *str) |
int | calc_ttf_right_justify (FT_Face face, char *str) |
int | calc_ttf_totalstringwidth (FT_Face face, char *str) |
int | calc_ttf_true_ypos (FT_Face face, int y, int ttf_fontsize) |
void | draw_ttf_char (g15canvas *canvas, FT_Bitmap charbitmap, unsigned char character, int x, int y, int color) |
void | draw_ttf_str (g15canvas *canvas, char *str, int x, int y, int color, FT_Face face) |
void | g15r_renderCharacterLarge (g15canvas *canvas, int col, int row, unsigned char character, unsigned int sx, unsigned int sy) |
Renders a character in the large font at (x, y) | |
void | g15r_renderCharacterMedium (g15canvas *canvas, int col, int row, unsigned char character, unsigned int sx, unsigned int sy) |
Renders a character in the meduim font at (x, y) | |
void | g15r_renderCharacterSmall (g15canvas *canvas, int col, int row, unsigned char character, unsigned int sx, unsigned int sy) |
Renders a character in the small font at (x, y) | |
void | g15r_renderString (g15canvas *canvas, unsigned char stringOut[], int row, int size, unsigned int sx, unsigned int sy) |
Renders a string with font size in row. | |
void | g15r_ttfLoad (g15canvas *canvas, char *fontname, int fontsize, int face_num) |
Loads a font through the FreeType2 library. | |
void | g15r_ttfPrint (g15canvas *canvas, int x, int y, int fontsize, int face_num, int color, int center, char *print_string) |
Prints a string in a given font. |
int calc_ttf_centering | ( | FT_Face | face, |
char * | str | ||
) |
Definition at line 209 of file text.c.
References calc_ttf_totalstringwidth().
Referenced by g15r_ttfPrint().
{ int leftpos; leftpos = 80 - (calc_ttf_totalstringwidth (face, str) / 2); if (leftpos < 1) leftpos = 1; return leftpos; }
int calc_ttf_right_justify | ( | FT_Face | face, |
char * | str | ||
) |
Definition at line 221 of file text.c.
References calc_ttf_totalstringwidth().
Referenced by g15r_ttfPrint().
{ int leftpos; leftpos = 160 - calc_ttf_totalstringwidth (face, str); if (leftpos < 1) leftpos = 1; return leftpos; }
int calc_ttf_totalstringwidth | ( | FT_Face | face, |
char * | str | ||
) |
Definition at line 191 of file text.c.
Referenced by calc_ttf_centering(), and calc_ttf_right_justify().
{ FT_GlyphSlot slot = face->glyph; FT_UInt glyph_index; int i, errcode; unsigned int len = strlen (str); int width = 0; for (i = 0; i < len; i++) { glyph_index = FT_Get_Char_Index (face, str[i]); errcode = FT_Load_Glyph (face, glyph_index, 0); width += slot->advance.x >> 6; } return width; }
int calc_ttf_true_ypos | ( | FT_Face | face, |
int | y, | ||
int | ttf_fontsize | ||
) |
Definition at line 179 of file text.c.
Referenced by g15r_ttfPrint().
{ if (!FT_IS_SCALABLE (face)) ttf_fontsize = face->available_sizes->height; y += ttf_fontsize * .75; return y; }
void draw_ttf_char | ( | g15canvas * | canvas, |
FT_Bitmap | charbitmap, | ||
unsigned char | character, | ||
int | x, | ||
int | y, | ||
int | color | ||
) |
Definition at line 233 of file text.c.
References g15canvas::ftLib, and g15r_setPixel().
Referenced by draw_ttf_str().
{ FT_Int char_x, char_y, p, q; FT_Int x_max = x + charbitmap.width; FT_Int y_max = y + charbitmap.rows; static FT_Bitmap tmpbuffer; /* convert to 8bit format.. */ FT_Bitmap_Convert (canvas->ftLib, &charbitmap, &tmpbuffer, 1); for (char_y = y, q = 0; char_y < y_max; char_y++, q++) for (char_x = x, p = 0; char_x < x_max; char_x++, p++) if (tmpbuffer.buffer[q * tmpbuffer.width + p]) g15r_setPixel (canvas, char_x, char_y, color); }
void draw_ttf_str | ( | g15canvas * | canvas, |
char * | str, | ||
int | x, | ||
int | y, | ||
int | color, | ||
FT_Face | face | ||
) |
Definition at line 251 of file text.c.
References draw_ttf_char().
Referenced by g15r_ttfPrint().
{ FT_GlyphSlot slot = face->glyph; int i, errcode; unsigned int len = strlen (str); for (i = 0; i < len; i++) { errcode = FT_Load_Char (face, str[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME | FT_LOAD_TARGET_MONO); draw_ttf_char (canvas, slot->bitmap, str[i], x + slot->bitmap_left, y - slot->bitmap_top, color); x += slot->advance.x >> 6; } }
void g15r_renderCharacterLarge | ( | g15canvas * | canvas, |
int | col, | ||
int | row, | ||
unsigned char | character, | ||
unsigned int | sx, | ||
unsigned int | sy | ||
) |
Renders a character in the large font at (x, y)
Definition at line 22 of file text.c.
References fontdata_8x8, G15_COLOR_BLACK, G15_COLOR_WHITE, and g15r_setPixel().
Referenced by g15r_renderString().
{ int helper = character * 8; /* for our font which is 8x8 */ int top_left_pixel_x = sx + col * (8); /* 1 pixel spacing */ int top_left_pixel_y = sy + row * (8); /* once again 1 pixel spacing */ int x, y; for (y = 0; y < 8; ++y) { for (x = 0; x < 8; ++x) { char font_entry = fontdata_8x8[helper + y]; if (font_entry & 1 << (7 - x)) g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, G15_COLOR_BLACK); else g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, G15_COLOR_WHITE); } } }
void g15r_renderCharacterMedium | ( | g15canvas * | canvas, |
int | col, | ||
int | row, | ||
unsigned char | character, | ||
unsigned int | sx, | ||
unsigned int | sy | ||
) |
Renders a character in the meduim font at (x, y)
Definition at line 50 of file text.c.
References fontdata_7x5, G15_COLOR_BLACK, G15_COLOR_WHITE, and g15r_setPixel().
Referenced by g15r_renderString().
{ int helper = character * 7 * 5; /* for our font which is 6x4 */ int top_left_pixel_x = sx + col * (5); /* 1 pixel spacing */ int top_left_pixel_y = sy + row * (7); /* once again 1 pixel spacing */ int x, y; for (y = 0; y < 7; ++y) { for (x = 0; x < 5; ++x) { char font_entry = fontdata_7x5[helper + y * 5 + x]; if (font_entry) g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, G15_COLOR_BLACK); else g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, G15_COLOR_WHITE); } } }
void g15r_renderCharacterSmall | ( | g15canvas * | canvas, |
int | col, | ||
int | row, | ||
unsigned char | character, | ||
unsigned int | sx, | ||
unsigned int | sy | ||
) |
Renders a character in the small font at (x, y)
Definition at line 77 of file text.c.
References fontdata_6x4, G15_COLOR_BLACK, G15_COLOR_WHITE, and g15r_setPixel().
Referenced by g15r_renderString().
{ int helper = character * 6 * 4; /* for our font which is 6x4 */ int top_left_pixel_x = sx + col * (4); /* 1 pixel spacing */ int top_left_pixel_y = sy + row * (6); /* once again 1 pixel spacing */ int x, y; for (y = 0; y < 6; ++y) { for (x = 0; x < 4; ++x) { char font_entry = fontdata_6x4[helper + y * 4 + x]; if (font_entry) g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, G15_COLOR_BLACK); else g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, G15_COLOR_WHITE); } } }
void g15r_renderString | ( | g15canvas * | canvas, |
unsigned char | stringOut[], | ||
int | row, | ||
int | size, | ||
unsigned int | sx, | ||
unsigned int | sy | ||
) |
Renders a string with font size in row.
Definition at line 104 of file text.c.
References G15_TEXT_LARGE, G15_TEXT_MED, G15_TEXT_SMALL, g15r_renderCharacterLarge(), g15r_renderCharacterMedium(), and g15r_renderCharacterSmall().
{ int i = 0; for (i; stringOut[i] != NULL; ++i) { switch (size) { case G15_TEXT_SMALL: { g15r_renderCharacterSmall (canvas, i, row, stringOut[i], sx, sy); break; } case G15_TEXT_MED: { g15r_renderCharacterMedium (canvas, i, row, stringOut[i], sx, sy); break; } case G15_TEXT_LARGE: { g15r_renderCharacterLarge (canvas, i, row, stringOut[i], sx, sy); break; } default: break; } } }
void g15r_ttfLoad | ( | g15canvas * | canvas, |
char * | fontname, | ||
int | fontsize, | ||
int | face_num | ||
) |
Loads a font through the FreeType2 library.
Load a font for use with FreeType2 font support
canvas | A pointer to a g15canvas struct in which the buffer to be operated on is found. |
fontname | Absolute pathname to font file to be loaded. |
fontsize | Size in points for font to be loaded. |
face_num | Slot into which font face will be loaded. |
Definition at line 145 of file text.c.
References g15canvas::ftLib, G15_MAX_FACE, g15canvas::ttf_face, and g15canvas::ttf_fontsize.
{ int errcode = 0; if (face_num < 0) face_num = 0; if (face_num > G15_MAX_FACE) face_num = G15_MAX_FACE; if (canvas->ttf_fontsize[face_num]) FT_Done_Face (canvas->ttf_face[face_num][0]); /* destroy the last face */ if (!canvas->ttf_fontsize[face_num] && !fontsize) canvas->ttf_fontsize[face_num] = 10; else canvas->ttf_fontsize[face_num] = fontsize; errcode = FT_New_Face (canvas->ftLib, fontname, 0, &canvas->ttf_face[face_num][0]); if (errcode) { canvas->ttf_fontsize[face_num] = 0; } else { if (canvas->ttf_fontsize[face_num] && FT_IS_SCALABLE (canvas->ttf_face[face_num][0])) errcode = FT_Set_Char_Size (canvas->ttf_face[face_num][0], 0, canvas->ttf_fontsize[face_num] * 64, 90, 0); } }
void g15r_ttfPrint | ( | g15canvas * | canvas, |
int | x, | ||
int | y, | ||
int | fontsize, | ||
int | face_num, | ||
int | color, | ||
int | center, | ||
char * | print_string | ||
) |
Prints a string in a given font.
Render a string with a FreeType2 font
canvas | A pointer to a g15canvas struct in which the buffer to be operated on is found. |
x | initial x position for string. |
y | initial y position for string. |
fontsize | Size of string in points. |
face_num | Font to be used is loaded in this slot. |
color | Text will be drawn this color. |
center | Text will be centered if center == 1 and right justified if center == 2. |
print_string | Pointer to the string to be printed. |
Definition at line 283 of file text.c.
References calc_ttf_centering(), calc_ttf_right_justify(), calc_ttf_true_ypos(), draw_ttf_str(), g15canvas::ttf_face, and g15canvas::ttf_fontsize.
{ int errcode = 0; if (canvas->ttf_fontsize[face_num]) { if (fontsize > 0 && FT_IS_SCALABLE (canvas->ttf_face[face_num][0])) { canvas->ttf_fontsize[face_num] = fontsize; int errcode = FT_Set_Pixel_Sizes (canvas->ttf_face[face_num][0], 0, canvas->ttf_fontsize[face_num]); if (errcode) printf ("Trouble setting the Glyph size!\n"); } y = calc_ttf_true_ypos (canvas->ttf_face[face_num][0], y, canvas->ttf_fontsize[face_num]); if (center == 1) x = calc_ttf_centering (canvas->ttf_face[face_num][0], print_string); else if (center == 2) x = calc_ttf_right_justify (canvas->ttf_face[face_num][0], print_string); draw_ttf_str (canvas, print_string, x, y, color, canvas->ttf_face[face_num][0]); } }