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https://git.do.srb2.org/STJr/SRB2.git
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330 lines
9.9 KiB
C
330 lines
9.9 KiB
C
// Emacs style mode select -*- C++ -*-
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//-----------------------------------------------------------------------------
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//
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// Copyright (C) 2011 by Callum Dickinson.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//-----------------------------------------------------------------------------
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/// \file
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/// \brief SDL_ttf interface code. Necessary for platforms with no framebuffer console systems.
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#if defined(HAVE_SDL) && defined(HAVE_TTF)
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#include "SDL.h"
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#include "SDL_ttf.h"
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#include "../doomdef.h"
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#include "../doomstat.h"
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#include "../d_netfil.h"
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#include "../filesrch.h"
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#include "i_ttf.h"
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// Search directories to find aforementioned TTF file.
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#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON)
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#define FONTSEARCHPATH1 "/usr/share/fonts"
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#define FONTSEARCHPATH2 "/usr/local/share/fonts"
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#define FONTSEARCHPATH3 "/usr/games/SRB2"
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#define FONTSEARCHPATH4 "/usr/local/games/SRB2"
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#define FONTSEARCHPATH5 "/usr/local/share/games/SRB2"
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#else
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#define FONTSEARCHPATH1 "."
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#endif
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#define FONTHANDLE -1
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// Renduring surfaces.
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SDL_Surface *TTFSurface = NULL;
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SDL_Surface *TTFRendSurface = NULL;
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// Text box.
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SDL_Rect TTFRect;
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// Temporary storage for the new TTFRect, used to check for
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// line wrapping.
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SDL_Rect TTFRectCheck;
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// Text rendering resolution.
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videoResolution res;
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// Text storage buffer, the contents get printed to the SDL surface.
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char textbuffer[8192];
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// look for default ttf file in given directory
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static char *searchFont(const char *fontsearchDir)
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{
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static char tempsw[256] = "";
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filestatus_t fstemp;
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strcpy(tempsw, FONTFILE);
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fstemp = filesearch(tempsw, fontsearchDir, NULL, true, 20);
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if (fstemp == FS_FOUND)
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{
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return tempsw;
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}
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return NULL;
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}
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// Load TTF font from file.
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INT32 I_TTFLoadFont(const char *file, UINT32 ptsize)
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{
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TTF_Font *tmpfont = NULL;
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float fontsize;
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// If a font is currently loaded, unload it.
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if (currentfont)
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{
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TTF_CloseFont(currentfont);
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}
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// Scale the specified font point size for the current resolution.
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fontsize = (ptsize * 0.005f) * (res.width - res.height);
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tmpfont = TTF_OpenFont(file, fontsize);
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if (!tmpfont)
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return FONTHANDLE;
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// set pointer for current font
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currentfont = tmpfont;
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// set current font point size
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currentfontpoint = ptsize;
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// get font properties, and set them
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currentfontstyle = TTF_GetFontStyle(currentfont);
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TTF_SetFontStyle(currentfont, currentfontstyle);
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// these functions only exist in SDL_ttf 2.0.10 onwards
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#if SDL_TTF_VERSION_ATLEAST(2,0,10)
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currentfontkerning = TTF_GetFontKerning(currentfont);
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TTF_SetFontKerning(currentfont, currentfontkerning);
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currentfonthinting = TTF_GetFontHinting(currentfont);
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TTF_SetFontHinting(currentfont, currentfonthinting);
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currentfontoutline = TTF_GetFontOutline(currentfont);
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TTF_SetFontOutline(currentfont, currentfontoutline);
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#endif
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return 0;
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}
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static void I_TTFRendSurface(const char *textmsg, TTF_Font *font, TextQuality quality, SDL_Color fontfgcolor, SDL_Color fontbgcolor)
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{
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// Print text in the buffer.
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// SDL_ttf has three modes to draw text.
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// Solid rendering is quick, but dirty. Use it if you need speed more than quality.
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switch (quality)
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{
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case solid:
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TTFRendSurface = TTF_RenderText_Solid(font, textmsg, fontfgcolor);
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break;
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// Shaded rendering adds a background to the rendered text. Because of this, I_TTFDrawText
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// takes an extra color more than the other styles to be a background color.
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// Shaded is supposedly as fast as solid rendering and about as good quality as blended.
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case shaded:
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TTFRendSurface = TTF_RenderText_Shaded(font, textmsg, fontfgcolor, fontbgcolor);
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break;
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// Blended rendering is the opposite of solid. Good quality, but slow.
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case blended:
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TTFRendSurface = TTF_RenderText_Blended(font, textmsg, fontfgcolor);
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break;
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}
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// Get SDL to update the main surface.
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SDL_BlitSurface(TTFRendSurface, NULL, TTFSurface, &TTFRect);
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SDL_Flip(TTFSurface);
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}
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// Draw text to screen. It will accept four colour vales (red, green, blue and alpha)
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// with foreground for draw modes Solid and Blended, and an extra four values for background
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// colour with draw type Shaded.
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void I_TTFDrawText(TTF_Font *font, TextQuality quality, INT32 fgR, INT32 fgG, INT32 fgB, INT32 fgA, INT32 bgR, INT32 bgG, INT32 bgB, INT32 bgA, const char *textmsg)
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{
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// Temporary small buffer to store character to process.
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// NULL pointer to prevc to kill warning
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char c, prevc = 0x0;
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// hack to allow TTF_SizeText to work properly.
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char linebuffer[2];
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// Don't need h, but TTF_SizeText needs a height parameter
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INT32 w, h;
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// Globally declare foreground and background text colours,
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// text drawing mode and the font to draw.
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SDL_Color fontfgcolor = {fgR, fgG, fgB, fgA};
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SDL_Color fontbgcolor = {bgR, bgG, bgB, bgA};
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// Keep on processing until the null terminator in the text buffer is reached.
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while (*textmsg != '\0')
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{
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// Copy pointer for current character into the temporary buffer.
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c = *textmsg;
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// If c is a newline, move to the next available line.
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if (c == '\n')
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{
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TTFRectCheck.x = 0;
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TTFRectCheck.y += (currentfontpoint + 1);
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}
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// Otherwise...
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else
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{
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// If the previous character was a newline, actually move to the next line.
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if (prevc == '\n')
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{
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if (textbuffer != NULL)
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{
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// Render cached text to the SDL surface.
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I_TTFRendSurface(textbuffer, font, quality, fontfgcolor, fontbgcolor);
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// Empty text buffer.
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memset(textbuffer, '\0', 1);
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}
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TTFRect.x = TTFRectCheck.x;
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TTFRect.y = TTFRectCheck.y;
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}
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// Copy the character to the text buffer.
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sprintf(textbuffer, "%s%c", textbuffer, c);
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// Hack to allow TTF_SizeText to work properly.
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sprintf(linebuffer, "%c", c);
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// If we have reached the end of the screen, move to the next available line.
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TTF_SizeText(currentfont, linebuffer, &w, &h);
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TTFRectCheck.x += w;
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if (TTFRectCheck.x >= res.width)
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{
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// Render cached text to the SDL surface.
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I_TTFRendSurface(textbuffer, font, quality, fontfgcolor, fontbgcolor);
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// Empty text buffer.
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memset(textbuffer, '\0', 1);
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// Move to the next line.
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TTFRectCheck.x = 0;
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TTFRectCheck.y += (currentfontpoint + 1);
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// Set stored co-ordinates for next line.
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TTFRect.x = TTFRectCheck.x;
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TTFRect.y = TTFRectCheck.y;
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}
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}
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// Add 1 to the pointer reference for the character to process.
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textmsg++;
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// Copy contents of the now-old buffer to somewhere else, so it can be referenced in next loop.
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prevc = c;
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}
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// If the buffer was previously emptied by a line wrapping operation and
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// no text came after that, don't print anything. Otherwise, print everything
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// still in the buffer.
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if (textbuffer != NULL)
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{
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// Render cached text to the SDL surface.
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I_TTFRendSurface(textbuffer, font, quality, fontfgcolor, fontbgcolor);
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// Empty text buffer.
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memset(textbuffer, '\0', 1);
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// Set stored co-ordinates for next line.
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TTFRect.x = TTFRectCheck.x;
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TTFRect.y = TTFRectCheck.y;
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}
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}
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// Initialise SDL_ttf.
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void I_StartupTTF(UINT32 fontpointsize, Uint32 initflags, Uint32 vidmodeflags)
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{
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char *fontpath = NULL;
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INT32 fontstatus = -1;
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res.width = 320;
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res.height = 200;
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bitsperpixel = 8;
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// what's the point of trying to display an error?
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// SDL_ttf is not started, can't display anything to screen (presumably)...
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if (SDL_InitSubSystem(initflags) < 0)
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I_Error("Couldn't initialize SDL: %s\n", SDL_GetError());
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TTFSurface = SDL_SetVideoMode(res.width, res.height, bitsperpixel, vidmodeflags);
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if (!TTFSurface)
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I_Error("Couldn't set SDL Video resolution: %s\n", SDL_GetError());
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if (TTF_Init() < 0)
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I_Error("Couldn't start SDL_ttf: %s\n", TTF_GetError());
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// look for default font in many directories
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#ifdef FONTSEARCHPATH1
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fontpath = searchFont(FONTSEARCHPATH1);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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#endif
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#ifdef FONTSEARCHPATH2
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if (fontstatus < 0)
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{
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fontpath = searchFont(FONTSEARCHPATH2);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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}
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#endif
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#ifdef FONTSEARCHPATH3
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if (fontstatus < 0)
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{
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fontpath = searchFont(FONTSEARCHPATH3);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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}
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#endif
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#ifdef FONTSEARCHPATH4
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if (fontstatus < 0)
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{
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fontpath = searchFont(FONTSEARCHPATH4);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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}
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#endif
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#ifdef FONTSEARCHPATH5
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if (fontstatus < 0)
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{
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fontpath = searchFont(FONTSEARCHPATH5);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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}
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#endif
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#ifdef FONTSEARCHPATH6
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if (fontstatus < 0)
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{
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fontpath = searchFont(FONTSEARCHPATH6);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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}
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#endif
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#ifdef FONTSEARCHPATH7
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if (fontstatus < 0)
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{
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fontpath = searchFont(FONTSEARCHPATH7);
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if (fontpath) fontstatus = I_TTFLoadFont(fontpath, fontpointsize);
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}
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#endif
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// argh! no font file found! disable SDL_ttf code
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if (fontstatus < 0)
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{
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I_ShutdownTTF();
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CONS_Printf("Unable to find default font files! Not loading SDL_ttf\n");
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}
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else
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{
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// Get SDL_ttf compiled and linked version
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SDL_version TTFcompiled;
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const SDL_version *TTFlinked;
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SDL_TTF_VERSION(&TTFcompiled);
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TTFlinked = TTF_Linked_Version();
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// Display it on screen
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CONS_Printf("Compiled for SDL_ttf version: %d.%d.%d\n",
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TTFcompiled.major, TTFcompiled.minor, TTFcompiled.patch);
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CONS_Printf("Linked with SDL_ttf version: %d.%d.%d\n",
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TTFlinked->major, TTFlinked->minor, TTFlinked->patch);
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}
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}
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void I_ShutdownTTF(void)
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{
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// close current font
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TTF_CloseFont(currentfont);
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// shutdown SDL_ttf
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TTF_Quit();
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// Free TTF rendering surfaces.
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SDL_FreeSurface(TTFSurface);
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SDL_FreeSurface(TTFRendSurface);
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}
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#endif
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