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authorJaakko Keränen <jaakko.keranen@iki.fi>2020-12-31 13:12:38 +0200
committerJaakko Keränen <jaakko.keranen@iki.fi>2020-12-31 13:12:38 +0200
commit897e8eb967bb2e26410d1a0cb7ca41ce9e3cf953 (patch)
tree01a0749073cc645471482d634226b09e97ee3caa /src/ui
parentb17a50de97780ab43ca958f9d84200388cac9b90 (diff)
Text: Clear glyph cache when it fills up
We can use a smaller glyph cache if we clear it when it fills up. Even a large cache would eventually fill up, so clearing is a good strategy anyway. Clears occur still rather infrequently.
Diffstat (limited to 'src/ui')
-rw-r--r--src/ui/text.c30
-rw-r--r--src/ui/window.c2
2 files changed, 29 insertions, 3 deletions
diff --git a/src/ui/text.c b/src/ui/text.c
index e9ca17e7..2b3e187d 100644
--- a/src/ui/text.c
+++ b/src/ui/text.c
@@ -130,10 +130,15 @@ static void init_Font(iFont *d, const iBlock *data, int height, float scale,
130 memset(d->indexTable, 0xff, sizeof(d->indexTable)); 130 memset(d->indexTable, 0xff, sizeof(d->indexTable));
131} 131}
132 132
133static void deinit_Font(iFont *d) { 133static void clearGlyphs_Font_(iFont *d) {
134 iForEach(Hash, i, &d->glyphs) { 134 iForEach(Hash, i, &d->glyphs) {
135 delete_Glyph((iGlyph *) i.value); 135 delete_Glyph((iGlyph *) i.value);
136 } 136 }
137 clear_Hash(&d->glyphs);
138}
139
140static void deinit_Font(iFont *d) {
141 clearGlyphs_Font_(d);
137 deinit_Hash(&d->glyphs); 142 deinit_Hash(&d->glyphs);
138 delete_Block(d->data); 143 delete_Block(d->data);
139} 144}
@@ -149,6 +154,8 @@ static uint32_t glyphIndex_Font_(iFont *d, iChar ch) {
149 return stbtt_FindGlyphIndex(&d->font, ch); 154 return stbtt_FindGlyphIndex(&d->font, ch);
150} 155}
151 156
157/*----------------------------------------------------------------------------------------------*/
158
152iDeclareType(Text) 159iDeclareType(Text)
153iDeclareType(CacheRow) 160iDeclareType(CacheRow)
154 161
@@ -332,11 +339,15 @@ static void deinitFonts_Text_(iText *d) {
332 } 339 }
333} 340}
334 341
342static int maxGlyphHeight_Text_(const iText *d) {
343 return 2 * d->contentFontSize * fontSize_UI;
344}
345
335static void initCache_Text_(iText *d) { 346static void initCache_Text_(iText *d) {
336 init_Array(&d->cacheRows, sizeof(iCacheRow)); 347 init_Array(&d->cacheRows, sizeof(iCacheRow));
337 const int textSize = d->contentFontSize * fontSize_UI; 348 const int textSize = d->contentFontSize * fontSize_UI;
338 iAssert(textSize > 0); 349 iAssert(textSize > 0);
339 const iInt2 cacheDims = init_I2(16, 80); 350 const iInt2 cacheDims = init_I2(16, 40);
340 d->cacheSize = mul_I2(cacheDims, init1_I2(iMax(textSize, fontSize_UI))); 351 d->cacheSize = mul_I2(cacheDims, init1_I2(iMax(textSize, fontSize_UI)));
341 SDL_RendererInfo renderInfo; 352 SDL_RendererInfo renderInfo;
342 SDL_GetRendererInfo(d->render, &renderInfo); 353 SDL_GetRendererInfo(d->render, &renderInfo);
@@ -419,6 +430,14 @@ void setContentFontSize_Text(float fontSizeFactor) {
419 } 430 }
420} 431}
421 432
433static void resetCache_Text_(iText *d) {
434 deinitCache_Text_(d);
435 for (int i = 0; i < max_FontId; i++) {
436 clearGlyphs_Font_(&d->fonts[i]);
437 }
438 initCache_Text_(d);
439}
440
422void resetFonts_Text(void) { 441void resetFonts_Text(void) {
423 iText *d = &text_; 442 iText *d = &text_;
424 deinitFonts_Text_(d); 443 deinitFonts_Text_(d);
@@ -574,6 +593,13 @@ static const iGlyph *glyph_Font_(iFont *d, iChar ch) {
574 iGlyph *glyph = new_Glyph(ch); 593 iGlyph *glyph = new_Glyph(ch);
575 glyph->glyphIndex = glyphIndex; 594 glyph->glyphIndex = glyphIndex;
576 glyph->font = font; 595 glyph->font = font;
596 /* If the cache is running out of space, clear it and we'll recache what's needed currently. */
597 if (text_.cacheBottom > text_.cacheSize.y - maxGlyphHeight_Text_(&text_)) {
598#if !defined (NDEBUG)
599 printf("[Text] glyph cache is full, clearing!\n"); fflush(stdout);
600#endif
601 resetCache_Text_(&text_);
602 }
577 SDL_Texture *oldTarget = SDL_GetRenderTarget(text_.render); 603 SDL_Texture *oldTarget = SDL_GetRenderTarget(text_.render);
578 SDL_SetRenderTarget(text_.render, text_.cache); 604 SDL_SetRenderTarget(text_.render, text_.cache);
579 cache_Font_(font, glyph, 0); 605 cache_Font_(font, glyph, 0);
diff --git a/src/ui/window.c b/src/ui/window.c
index 2933a47d..c13d5843 100644
--- a/src/ui/window.c
+++ b/src/ui/window.c
@@ -969,7 +969,7 @@ void draw_Window(iWindow *d) {
969#if 0 969#if 0
970 /* Text cache debugging. */ { 970 /* Text cache debugging. */ {
971 SDL_Texture *cache = glyphCache_Text(); 971 SDL_Texture *cache = glyphCache_Text();
972 SDL_Rect rect = { d->root->rect.size.x - 640, 0, 640, 5 * 640 }; 972 SDL_Rect rect = { d->root->rect.size.x - 640, 0, 640, 2.5 * 640 };
973 SDL_SetRenderDrawColor(d->render, 0, 0, 0, 255); 973 SDL_SetRenderDrawColor(d->render, 0, 0, 0, 255);
974 SDL_RenderFillRect(d->render, &rect); 974 SDL_RenderFillRect(d->render, &rect);
975 SDL_RenderCopy(d->render, glyphCache_Text(), NULL, &rect); 975 SDL_RenderCopy(d->render, glyphCache_Text(), NULL, &rect);