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[client] fonts: support rendering multiline text with SDL

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Quantum 2021-01-30 17:06:23 -05:00 committed by Geoffrey McRae
parent 96dc8c602c
commit 17b0e2cb22
1 changed files with 52 additions and 1 deletions
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53
client/fonts/SDL/src/sdl.c
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@ -149,6 +149,47 @@ static void lgf_sdl_destroy(LG_FontObj opaque)
}
}
static int lgf_sdl_multiline_width(TTF_Font * font, const char * text)
{
int w, maxW = 0;
const char * ptr = text;
char * buf = NULL;
size_t size = 0;
while (*ptr)
{
const char * newLine = strchr(ptr, '\n');
size_t line = newLine ? newLine - ptr : strlen(ptr);
if (line > size)
{
size = line * 2 + 1;
void * new = realloc(buf, size);
if (!new)
{
DEBUG_ERROR("Failed to allocate memory");
free(buf);
return -1;
}
buf = new;
}
memcpy(buf, ptr, line);
buf[line] = '\0';
if (TTF_SizeUTF8(font, buf, &w, NULL) < 0)
{
free(buf);
DEBUG_ERROR("Failed to measure text: %s", TTF_GetError());
return -1;
}
if (w > maxW)
maxW = w;
ptr += line + 1;
}
free(buf);
return maxW;
}
static LG_FontBitmap * lgf_sdl_render(LG_FontObj opaque, unsigned int fg_color, const char * text)
{
struct Inst * this = (struct Inst *)opaque;
@ -160,7 +201,17 @@ static LG_FontBitmap * lgf_sdl_render(LG_FontObj opaque, unsigned int fg_color,
color.b = (fg_color & 0x0000ff00) >> 8;
color.a = (fg_color & 0x000000ff) >> 0;
if (!(surface = TTF_RenderText_Blended(this->font, text, color)))
if (strchr(text, '\n'))
{
int width = lgf_sdl_multiline_width(this->font, text);
if (width < 1)
return NULL;
surface = TTF_RenderUTF8_Blended_Wrapped(this->font, text, color, width);
}
else
surface = TTF_RenderUTF8_Blended(this->font, text, color);
if (!surface)
{
DEBUG_ERROR("Failed to render text: %s", TTF_GetError());
return NULL;