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Added rudimentary support for font outlines.

This commit is contained in:
David Salvisberg 2014-12-31 13:49:18 +01:00
parent 11cfe887c2
commit b1e1d28879
1 changed files with 28 additions and 3 deletions
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31
src/bitmap.cpp
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@ -51,6 +51,8 @@
"Operation not supported for mega surfaces"); \ "Operation not supported for mega surfaces"); \
} }
#define OUTLINE_SIZE 1
/* Normalize (= ensure width and /* Normalize (= ensure width and
* height are positive) */ * height are positive) */
static IntRect normalizedRect(const IntRect &rect) static IntRect normalizedRect(const IntRect &rect)
@ -942,6 +944,7 @@ void Bitmap::drawText(const IntRect &rect, const char *str, int align)
TTF_Font *font = p->font->getSdlFont(); TTF_Font *font = p->font->getSdlFont();
const Color &fontColor = p->font->getColor(); const Color &fontColor = p->font->getColor();
const Color &outColor = p->font->getOutColor();
SDL_Color c = fontColor.toSDLColor(); SDL_Color c = fontColor.toSDLColor();
c.a = 255; c.a = 255;
@ -957,11 +960,33 @@ void Bitmap::drawText(const IntRect &rect, const char *str, int align)
p->ensureFormat(txtSurf, SDL_PIXELFORMAT_ABGR8888); p->ensureFormat(txtSurf, SDL_PIXELFORMAT_ABGR8888);
// While real outlining is not yet here, use shadow if (p->font->getShadow())
// as a replacement to at least make text legible
if (p->font->getShadow() || p->font->getOutline())
applyShadow(txtSurf, *p->format, c); applyShadow(txtSurf, *p->format, c);
/* outline using TTF_Outline and blending it together with SDL_BlitSurface
* FIXME: outline is forced to have the same opacity as the font color */
if (p->font->getOutline()) {
SDL_Color co = outColor.toSDLColor();
co.a = 255;
SDL_Surface *outline;
/* set the next font render to render the outline */
TTF_SetFontOutline(font, OUTLINE_SIZE);
if (shState->rtData().config.solidFonts)
outline = TTF_RenderUTF8_Solid(font, str, co);
else
outline = TTF_RenderUTF8_Blended(font, str, co);
p->ensureFormat(outline, SDL_PIXELFORMAT_ABGR8888);
SDL_Rect outRect = {OUTLINE_SIZE, OUTLINE_SIZE, txtSurf->w, txtSurf->h};
SDL_SetSurfaceBlendMode(txtSurf, SDL_BLENDMODE_BLEND);
SDL_BlitSurface(txtSurf, NULL, outline, &outRect);
SDL_FreeSurface(txtSurf);
txtSurf = outline;
/* reset outline to 0 */
TTF_SetFontOutline(font, 0);
}
int alignX = rect.x; int alignX = rect.x;
switch (align) switch (align)