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Refactor the font management code

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Use a hash table for special glyph status caching
Manage (almost) all global state with a single object
Allocate all fonts on the heap
Fix the use-after-free for fallback fonts
This commit is contained in:
Kovid Goyal 2017-11-13 15:53:34 +05:30
parent 26e6716f67
commit 94c11af7c8
No known key found for this signature in database
GPG Key ID: 06BC317B515ACE7C
1 changed files with 182 additions and 146 deletions
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328
kitty/fonts.c
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@ -17,6 +17,9 @@ static PyObject *python_send_to_gpu_impl = NULL;
extern PyTypeObject Line_Type; extern PyTypeObject Line_Type;
typedef struct SpritePosition SpritePosition; typedef struct SpritePosition SpritePosition;
typedef struct SpecialGlyphCache SpecialGlyphCache;
enum {NO_FONT=-3, MISSING_FONT=-2, BLANK_FONT=-1, BOX_FONT=0};
struct SpritePosition { struct SpritePosition {
SpritePosition *next; SpritePosition *next;
@ -27,6 +30,11 @@ struct SpritePosition {
uint64_t extra_glyphs; uint64_t extra_glyphs;
}; };
struct SpecialGlyphCache {
SpecialGlyphCache *next;
glyph_index glyph;
bool is_special, filled;
};
typedef struct { typedef struct {
size_t max_array_len, max_texture_size, max_y; size_t max_array_len, max_texture_size, max_y;
@ -44,10 +52,25 @@ typedef struct {
hb_font_t *hb_font; hb_font_t *hb_font;
// Map glyphs to sprite map co-ords // Map glyphs to sprite map co-ords
SpritePosition sprite_map[1024]; SpritePosition sprite_map[1024];
uint8_t special_glyph_cache[1 << (8 * sizeof(glyph_index))]; SpecialGlyphCache special_glyph_cache[1024];
bool bold, italic; bool bold, italic;
} Font; } Font;
typedef struct {
char_type left, right;
size_t font_idx;
} SymbolMap;
typedef struct {
Font *fonts;
SymbolMap* symbol_maps;
size_t fonts_capacity, fonts_count, symbol_maps_capacity, symbol_maps_count, symbol_map_fonts_count, fallback_fonts_count;
ssize_t box_font_idx, medium_font_idx, bold_font_idx, italic_font_idx, bi_font_idx, first_symbol_font_idx, first_fallback_font_idx;
} Fonts;
static Fonts fonts = {0};
// Sprites {{{
static inline void static inline void
sprite_map_set_error(int error) { sprite_map_set_error(int error) {
@ -109,23 +132,47 @@ sprite_position_for(Font *font, glyph_index glyph, uint64_t extra_glyphs, uint8_
return s; return s;
} }
static SpecialGlyphCache*
special_glyph_cache_for(Font *font, glyph_index glyph) {
SpecialGlyphCache *s = font->special_glyph_cache + (glyph & 0x3ff);
// Optimize for the common case of glyph under 1024 already in the cache
if (LIKELY(s->glyph == glyph && s->filled)) return s; // Cache hit
while(true) {
if (s->filled) {
if (s->glyph == glyph) return s; // Cache hit
} else {
break;
}
if (!s->next) {
s->next = calloc(1, sizeof(SpecialGlyphCache));
if (s->next == NULL) return NULL;
}
s = s->next;
}
s->glyph = glyph;
return s;
}
void void
sprite_tracker_current_layout(unsigned int *x, unsigned int *y, unsigned int *z) { sprite_tracker_current_layout(unsigned int *x, unsigned int *y, unsigned int *z) {
*x = sprite_tracker.xnum; *y = sprite_tracker.ynum; *z = sprite_tracker.z; *x = sprite_tracker.xnum; *y = sprite_tracker.ynum; *z = sprite_tracker.z;
} }
void void
sprite_map_free(Font *font) { free_maps(Font *font) {
SpritePosition *s, *t; #define free_a_map(type, attr) {\
for (size_t i = 0; i < sizeof(font->sprite_map)/sizeof(font->sprite_map[0]); i++) { type *s, *t; \
s = font->sprite_map + i; for (size_t i = 0; i < sizeof(font->attr)/sizeof(font->attr[0]); i++) { \
s = s->next; s = font->attr[i].next; \
while (s) { while (s) { \
t = s; t = s; \
s = s->next; s = s->next; \
free(t); free(t); \
} } \
} }}
free_a_map(SpritePosition, sprite_map);
free_a_map(SpecialGlyphCache, special_glyph_cache);
#undef free_a_map
} }
void void
@ -142,6 +189,20 @@ clear_sprite_map(Font *font) {
#undef CLEAR #undef CLEAR
} }
void
clear_special_glyph_cache(Font *font) {
#define CLEAR(s) s->filled = false; s->glyph = 0;
SpecialGlyphCache *s;
for (size_t i = 0; i < sizeof(font->special_glyph_cache)/sizeof(font->special_glyph_cache[0]); i++) {
s = font->special_glyph_cache + i;
CLEAR(s);
while ((s = s->next)) {
CLEAR(s);
}
}
#undef CLEAR
}
void void
sprite_tracker_set_layout(unsigned int cell_width, unsigned int cell_height) { sprite_tracker_set_layout(unsigned int cell_width, unsigned int cell_height) {
sprite_tracker.xnum = MIN(MAX(1, sprite_tracker.max_texture_size / cell_width), UINT16_MAX); sprite_tracker.xnum = MIN(MAX(1, sprite_tracker.max_texture_size / cell_width), UINT16_MAX);
@ -149,6 +210,7 @@ sprite_tracker_set_layout(unsigned int cell_width, unsigned int cell_height) {
sprite_tracker.ynum = 1; sprite_tracker.ynum = 1;
sprite_tracker.x = 0; sprite_tracker.y = 0; sprite_tracker.z = 0; sprite_tracker.x = 0; sprite_tracker.y = 0; sprite_tracker.z = 0;
} }
// }}}
static inline PyObject* static inline PyObject*
desc_to_face(PyObject *desc) { desc_to_face(PyObject *desc) {
@ -161,7 +223,7 @@ desc_to_face(PyObject *desc) {
static inline bool static inline bool
alloc_font(Font *f, PyObject *descriptor, bool bold, bool italic, bool is_face) { init_font(Font *f, PyObject *descriptor, bool bold, bool italic, bool is_face) {
PyObject *face; PyObject *face;
if (is_face) { face = descriptor; Py_INCREF(face); } if (is_face) { face = descriptor; Py_INCREF(face); }
else { face = desc_to_face(descriptor); if (face == NULL) return false; } else { face = desc_to_face(descriptor); if (face == NULL) return false; }
@ -173,10 +235,10 @@ alloc_font(Font *f, PyObject *descriptor, bool bold, bool italic, bool is_face)
} }
static inline void static inline void
free_font(Font *f) { del_font(Font *f) {
f->hb_font = NULL; f->hb_font = NULL;
Py_CLEAR(f->face); Py_CLEAR(f->face);
sprite_map_free(f); free_maps(f);
f->bold = false; f->italic = false; f->bold = false; f->italic = false;
} }
@ -184,25 +246,11 @@ static inline void
clear_font(Font *f) { clear_font(Font *f) {
f->hb_font = NULL; f->hb_font = NULL;
Py_CLEAR(f->face); Py_CLEAR(f->face);
clear_sprite_map(f); clear_sprite_map(f); clear_special_glyph_cache(f);
memset(f->special_glyph_cache, 0, sizeof(f->special_glyph_cache));
f->bold = false; f->italic = false; f->bold = false; f->italic = false;
} }
static Font medium_font = {0}, bold_font = {0}, italic_font = {0}, bi_font = {0}, box_font = {0};
static Font *fallback_fonts = NULL;
static size_t fallback_fonts_count = 0;
typedef enum { FONT, BLANK_FONT, BOX_FONT, MISSING_FONT } FontType;
typedef struct {
char_type left, right;
size_t font_idx;
} SymbolMap;
static SymbolMap* symbol_maps = NULL;
static Font *symbol_map_fonts = NULL;
static size_t symbol_maps_count = 0, symbol_map_fonts_count = 0;
static unsigned int cell_width = 0, cell_height = 0, baseline = 0, underline_position = 0, underline_thickness = 0; static unsigned int cell_width = 0, cell_height = 0, baseline = 0, underline_position = 0, underline_thickness = 0;
static uint8_t *canvas = NULL; static uint8_t *canvas = NULL;
#define CELLS_IN_CANVAS 16 #define CELLS_IN_CANVAS 16
@ -221,9 +269,10 @@ python_send_to_gpu(unsigned int x, unsigned int y, unsigned int z, uint8_t* buf)
static inline PyObject* static inline PyObject*
update_cell_metrics() { update_cell_metrics() {
#define CALL(f, desired_height, force) { if ((f)->face) { if(!set_size_for_face((f)->face, desired_height, force)) return NULL; (f)->hb_font = harfbuzz_font_for_face((f)->face); } clear_sprite_map((f)); } #define CALL(idx, desired_height, force) { if (idx >= 0) { Font *f = fonts.fonts + idx; if ((f)->face) { if(!set_size_for_face((f)->face, desired_height, force)) return NULL; (f)->hb_font = harfbuzz_font_for_face((f)->face); } clear_sprite_map((f)); }}
CALL(&medium_font, 0, false); CALL(&bold_font, 0, false); CALL(&italic_font, 0, false); CALL(&bi_font, 0, false); CALL(&box_font, 0, false); CALL(BOX_FONT, 0, false); CALL(fonts.medium_font_idx, 0, false);
cell_metrics(medium_font.face, &cell_width, &cell_height, &baseline, &underline_position, &underline_thickness); CALL(fonts.bold_font_idx, 0, false); CALL(fonts.italic_font_idx, 0, false); CALL(fonts.bi_font_idx, 0, false);
cell_metrics(fonts.fonts[fonts.medium_font_idx].face, &cell_width, &cell_height, &baseline, &underline_position, &underline_thickness);
if (!cell_width) { PyErr_SetString(PyExc_ValueError, "Failed to calculate cell width for the specified font."); return NULL; } if (!cell_width) { PyErr_SetString(PyExc_ValueError, "Failed to calculate cell width for the specified font."); return NULL; }
if (OPT(adjust_line_height_px) != 0) cell_height += OPT(adjust_line_height_px); if (OPT(adjust_line_height_px) != 0) cell_height += OPT(adjust_line_height_px);
if (OPT(adjust_line_height_frac) != 0.f) cell_height *= OPT(adjust_line_height_frac); if (OPT(adjust_line_height_frac) != 0.f) cell_height *= OPT(adjust_line_height_frac);
@ -234,11 +283,11 @@ update_cell_metrics() {
global_state.cell_width = cell_width; global_state.cell_height = cell_height; global_state.cell_width = cell_width; global_state.cell_height = cell_height;
free(canvas); canvas = malloc(CELLS_IN_CANVAS * cell_width * cell_height); free(canvas); canvas = malloc(CELLS_IN_CANVAS * cell_width * cell_height);
if (canvas == NULL) return PyErr_NoMemory(); if (canvas == NULL) return PyErr_NoMemory();
for (size_t i = 0; i < fallback_fonts_count; i++) { for (ssize_t i = 0, j = fonts.first_symbol_font_idx; i < (ssize_t)fonts.symbol_map_fonts_count; i++, j++) {
CALL(fallback_fonts + i, cell_height, true); CALL(j, cell_height, true);
} }
for (size_t i = 0; i < symbol_map_fonts_count; i++) { for (ssize_t i = 0, j = fonts.first_fallback_font_idx; i < (ssize_t)fonts.fallback_fonts_count; i++, j++) {
CALL(symbol_map_fonts + i, cell_height, true); CALL(j, cell_height, true);
} }
return Py_BuildValue("IIIII", cell_width, cell_height, baseline, underline_position, underline_thickness); return Py_BuildValue("IIIII", cell_width, cell_height, baseline, underline_position, underline_thickness);
#undef CALL #undef CALL
@ -266,52 +315,53 @@ has_cell_text(Font *self, Cell *cell) {
return true; return true;
} }
static inline ssize_t
static inline Font*
fallback_font(Cell *cell) { fallback_font(Cell *cell) {
bool bold = (cell->attrs >> BOLD_SHIFT) & 1; bool bold = (cell->attrs >> BOLD_SHIFT) & 1;
bool italic = (cell->attrs >> ITALIC_SHIFT) & 1; bool italic = (cell->attrs >> ITALIC_SHIFT) & 1;
Font *base_font, *ans; ssize_t f;
for (size_t i = 0; i < fallback_fonts_count; i++) { for (size_t i = 0, j = fonts.first_fallback_font_idx; i < fonts.fallback_fonts_count; i++, j++) {
if (fallback_fonts[i].bold == bold && fallback_fonts[i].italic == italic && has_cell_text(fallback_fonts + i, cell)) { Font *ff = fonts.fonts +j;
return fallback_fonts + i; if (ff->bold == bold && ff->italic == italic && has_cell_text(ff, cell)) {
return j;
} }
} }
if (fallback_fonts_count > 100) { fprintf(stderr, "Too many fallback fonts\n"); return NULL; } if (fonts.fallback_fonts_count > 100) { fprintf(stderr, "Too many fallback fonts\n"); return MISSING_FONT; }
if (bold) base_font = italic ? &bi_font : &bold_font; if (bold) f = fonts.italic_font_idx > 0 ? fonts.bi_font_idx : fonts.bold_font_idx;
else base_font = italic ? &italic_font : &medium_font; else f = italic ? fonts.italic_font_idx : fonts.medium_font_idx;
if (!base_font->face) base_font = &medium_font; if (f < 0) f = fonts.medium_font_idx;
PyObject *face = create_fallback_face(base_font->face, cell, bold, italic); PyObject *face = create_fallback_face(fonts.fonts[f].face, cell, bold, italic);
if (face == NULL) { PyErr_Print(); return NULL; } if (face == NULL) { PyErr_Print(); return MISSING_FONT; }
if (face == Py_None) { Py_DECREF(face); return NULL; } if (face == Py_None) { Py_DECREF(face); return MISSING_FONT; }
set_size_for_face(face, cell_height, true); set_size_for_face(face, cell_height, true);
fallback_fonts = realloc(fallback_fonts, sizeof(Font) * (fallback_fonts_count + 1)); ensure_space_for(&fonts, fonts, Font, fonts.fonts_count + 1, fonts_capacity, 5, true);
if (fallback_fonts == NULL) fatal("Out of memory"); ssize_t ans = fonts.first_fallback_font_idx + fonts.fallback_fonts_count;
ans = fallback_fonts + fallback_fonts_count; Font *af = &fonts.fonts[ans];
memset(ans, 0, sizeof(Font)); if (!init_font(af, face, bold, italic, true)) fatal("Out of memory");
if (!alloc_font(ans, face, bold, italic, true)) fatal("Out of memory");
Py_DECREF(face); Py_DECREF(face);
fallback_fonts_count++; fonts.fallback_fonts_count++;
fonts.fonts_count++;
return ans; return ans;
} }
static inline Font* static inline ssize_t
in_symbol_maps(char_type ch) { in_symbol_maps(char_type ch) {
for (size_t i = 0; i < symbol_maps_count; i++) { for (size_t i = 0; i < fonts.symbol_maps_count; i++) {
if (symbol_maps[i].left <= ch && ch <= symbol_maps[i].right) return symbol_map_fonts + symbol_maps[i].font_idx; if (fonts.symbol_maps[i].left <= ch && ch <= fonts.symbol_maps[i].right) return fonts.first_symbol_font_idx + fonts.symbol_maps[i].font_idx;
} }
return NULL; return NO_FONT;
} }
static FontType
font_for_cell(Cell *cell, Font** font) { static ssize_t
font_for_cell(Cell *cell) {
START_ALLOW_CASE_RANGE START_ALLOW_CASE_RANGE
ssize_t ans;
switch(cell->ch) { switch(cell->ch) {
case 0: case 0:
case ' ': case ' ':
@ -322,25 +372,21 @@ START_ALLOW_CASE_RANGE
case 0xe0b2: case 0xe0b2:
return BOX_FONT; return BOX_FONT;
default: default:
*font = in_symbol_maps(cell->ch); ans = in_symbol_maps(cell->ch);
if (*font != NULL) return FONT; if (ans > -1) return ans;
switch(BI_VAL(cell->attrs)) { switch(BI_VAL(cell->attrs)) {
case 0: case 0:
*font = &medium_font; ans = fonts.medium_font_idx; break;
break;
case 1: case 1:
*font = bold_font.face ? &bold_font : &medium_font; ans = fonts.bold_font_idx ; break;
break;
case 2: case 2:
*font = italic_font.face ? &italic_font : &medium_font; ans = fonts.italic_font_idx; break;
break;
case 3: case 3:
*font = bi_font.face ? &bi_font : &medium_font; ans = fonts.bi_font_idx; break;
break;
} }
if (has_cell_text(*font, cell)) return FONT; if (ans < 0) ans = fonts.medium_font_idx;
*font = fallback_font(cell); if (has_cell_text(fonts.fonts + ans, cell)) return ans;
return *font ? FONT : MISSING_FONT; return fallback_font(cell);
} }
END_ALLOW_CASE_RANGE END_ALLOW_CASE_RANGE
} }
@ -372,7 +418,7 @@ static void
render_box_cell(Cell *cell) { render_box_cell(Cell *cell) {
int error = 0; int error = 0;
glyph_index glyph = box_glyph_id(cell->ch); glyph_index glyph = box_glyph_id(cell->ch);
SpritePosition *sp = sprite_position_for(&box_font, glyph, 0, false, &error); SpritePosition *sp = sprite_position_for(&fonts.fonts[BOX_FONT], glyph, 0, false, &error);
if (sp == NULL) { if (sp == NULL) {
sprite_map_set_error(error); PyErr_Print(); sprite_map_set_error(error); PyErr_Print();
set_sprite(cell, 0, 0, 0); set_sprite(cell, 0, 0, 0);
@ -460,13 +506,16 @@ static inline bool
is_special_glyph(glyph_index glyph_id, Font *font, CellData* cell_data) { is_special_glyph(glyph_index glyph_id, Font *font, CellData* cell_data) {
// A glyph is special if the codepoint it corresponds to matches a // A glyph is special if the codepoint it corresponds to matches a
// different glyph in the font // different glyph in the font
if (font->special_glyph_cache[glyph_id] == 0) { SpecialGlyphCache *s = special_glyph_cache_for(font, glyph_id);
font->special_glyph_cache[glyph_id] = cell_data->current_codepoint ? ( if (s == NULL) return false;
glyph_id != glyph_id_for_codepoint(font->face, cell_data->current_codepoint) ? 1 : 2) if (!s->filled) {
s->is_special = cell_data->current_codepoint ? (
glyph_id != glyph_id_for_codepoint(font->face, cell_data->current_codepoint) ? true : false)
: :
2; false;
s->filled = true;
} }
return font->special_glyph_cache[glyph_id] & 1; return s->is_special;
} }
static inline unsigned int static inline unsigned int
@ -608,9 +657,8 @@ test_shape(PyObject UNUSED *self, PyObject *args) {
if(!PyArg_ParseTuple(args, "O!|zi", &Line_Type, &line, &path, &index)) return NULL; if(!PyArg_ParseTuple(args, "O!|zi", &Line_Type, &line, &path, &index)) return NULL;
index_type num = 0; index_type num = 0;
while(num < line->xnum && line->cells[num].ch) num += line->cells[num].attrs & WIDTH_MASK; while(num < line->xnum && line->cells[num].ch) num += line->cells[num].attrs & WIDTH_MASK;
load_hb_buffer(line->cells, num);
PyObject *face = NULL; PyObject *face = NULL;
Font *font = &medium_font; Font *font = fonts.fonts + fonts.medium_font_idx;
if (path) { if (path) {
face = face_from_path(path, index); face = face_from_path(path, index);
if (face == NULL) return NULL; if (face == NULL) return NULL;
@ -618,7 +666,6 @@ test_shape(PyObject UNUSED *self, PyObject *args) {
font->hb_font = harfbuzz_font_for_face(face); font->hb_font = harfbuzz_font_for_face(face);
font->face = face; font->face = face;
} }
hb_shape(font->hb_font, harfbuzz_buffer, NULL, 0);
hb_glyph_info_t *info; hb_glyph_info_t *info;
hb_glyph_position_t *positions; hb_glyph_position_t *positions;
unsigned int num_glyphs = shape(line->cells, num, font->hb_font, &info, &positions); unsigned int num_glyphs = shape(line->cells, num, font->hb_font, &info, &positions);
@ -636,10 +683,10 @@ test_shape(PyObject UNUSED *self, PyObject *args) {
} }
static inline void static inline void
render_run(Cell *first_cell, index_type num_cells, Font *font, FontType ft) { render_run(Cell *first_cell, index_type num_cells, ssize_t font_idx) {
switch(ft) { switch(font_idx) {
case FONT: default:
shape_run(first_cell, num_cells, font); shape_run(first_cell, num_cells, &fonts.fonts[font_idx]);
break; break;
case BLANK_FONT: case BLANK_FONT:
while(num_cells--) set_sprite(first_cell++, 0, 0, 0); while(num_cells--) set_sprite(first_cell++, 0, 0, 0);
@ -655,20 +702,19 @@ render_run(Cell *first_cell, index_type num_cells, Font *font, FontType ft) {
void void
render_line(Line *line) { render_line(Line *line) {
#define RENDER if ((run_font != NULL || run_font_type != FONT) && i > first_cell_in_run) render_run(line->cells + first_cell_in_run, i - first_cell_in_run, run_font, run_font_type); #define RENDER if (run_font_idx != NO_FONT && i > first_cell_in_run) render_run(line->cells + first_cell_in_run, i - first_cell_in_run, run_font_idx);
Font *run_font = NULL; ssize_t run_font_idx = NO_FONT;
FontType run_font_type = MISSING_FONT;
index_type first_cell_in_run, i; index_type first_cell_in_run, i;
attrs_type prev_width = 0; attrs_type prev_width = 0;
for (i=0, first_cell_in_run=0; i < line->xnum; i++) { for (i=0, first_cell_in_run=0; i < line->xnum; i++) {
if (prev_width == 2) { prev_width = 0; continue; } if (prev_width == 2) { prev_width = 0; continue; }
Cell *cell = line->cells + i; Cell *cell = line->cells + i;
Font *cell_font = NULL; ssize_t cell_font_idx = font_for_cell(cell);
FontType cell_font_type = font_for_cell(cell, &cell_font);
prev_width = cell->attrs & WIDTH_MASK; prev_width = cell->attrs & WIDTH_MASK;
if (cell_font_type == run_font_type && cell_font == run_font) continue; if (run_font_idx == NO_FONT) run_font_idx = cell_font_idx;
if (run_font_idx == cell_font_idx) continue;
RENDER; RENDER;
run_font = cell_font; run_font_type = cell_font_type; run_font_idx = cell_font_idx;
first_cell_in_run = i; first_cell_in_run = i;
} }
RENDER; RENDER;
@ -681,36 +727,32 @@ set_font(PyObject UNUSED *m, PyObject *args) {
Py_CLEAR(box_drawing_function); Py_CLEAR(box_drawing_function);
if (!PyArg_ParseTuple(args, "OO!O!fO|OOO", &box_drawing_function, &PyTuple_Type, &sm, &PyTuple_Type, &smf, &global_state.font_sz_in_pts, &medium, &bold, &italic, &bi)) return NULL; if (!PyArg_ParseTuple(args, "OO!O!fO|OOO", &box_drawing_function, &PyTuple_Type, &sm, &PyTuple_Type, &smf, &global_state.font_sz_in_pts, &medium, &bold, &italic, &bi)) return NULL;
Py_INCREF(box_drawing_function); Py_INCREF(box_drawing_function);
clear_font(&medium_font); clear_font(&bold_font); clear_font(&italic_font); clear_font(&bi_font); clear_sprite_map(&box_font); fonts.symbol_map_fonts_count = PyTuple_GET_SIZE(smf);
if (!alloc_font(&medium_font, medium, false, false, false)) return NULL; size_t num_fonts = 5 + fonts.symbol_map_fonts_count;
if (bold && !alloc_font(&bold_font, bold, true, false, false)) return NULL; for (size_t i = 0; i < fonts.fonts_count; i++) del_font(fonts.fonts + i);
if (italic && !alloc_font(&italic_font, italic, false, true, false)) return NULL; ensure_space_for(&fonts, fonts, Font, num_fonts, fonts_capacity, 5, true);
if (bi && !alloc_font(&bi_font, bi, true, true, false)) return NULL; fonts.fonts_count = 1;
for (size_t i = 0; i < fallback_fonts_count; i++) free_font(fallback_fonts + i); #define A(attr, bold, italic) { if(attr) { if (!init_font(&fonts.fonts[fonts.fonts_count], attr, bold, italic, false)) return NULL; fonts.attr##_font_idx = fonts.fonts_count++; } else fonts.attr##_font_idx = -1; }
for (size_t i = 0; symbol_map_fonts_count; i++) free_font(symbol_map_fonts + i); A(medium, false, false);
free(fallback_fonts); fallback_fonts = NULL; fallback_fonts_count = 0; A(bold, true, false); A(italic, false, true); A(bi, true, true);
free(symbol_maps); free(symbol_map_fonts); symbol_maps = NULL; symbol_map_fonts = NULL; #undef A
symbol_maps_count = 0; symbol_map_fonts_count = 0;
symbol_maps_count = PyTuple_GET_SIZE(sm); fonts.first_symbol_font_idx = fonts.fonts_count;
if (symbol_maps_count > 0) { fonts.symbol_maps_count = PyTuple_GET_SIZE(sm);
symbol_maps = malloc(symbol_maps_count * sizeof(SymbolMap)); ensure_space_for(&fonts, symbol_maps, SymbolMap, fonts.symbol_maps_count, symbol_maps_capacity, 5, true);
symbol_map_fonts_count = PyTuple_GET_SIZE(smf); for (size_t i = 0; i < fonts.symbol_map_fonts_count; i++) {
symbol_map_fonts = calloc(symbol_map_fonts_count, sizeof(Font)); PyObject *face;
if (symbol_maps == NULL || symbol_map_fonts == NULL) return PyErr_NoMemory(); int bold, italic;
if (!PyArg_ParseTuple(PyTuple_GET_ITEM(smf, i), "Opp", &face, &bold, &italic)) return NULL;
for (size_t i = 0; i < symbol_map_fonts_count; i++) { if (!init_font(fonts.fonts + fonts.fonts_count++, face, bold != 0, italic != 0, false)) return NULL;
PyObject *face;
int bold, italic;
if (!PyArg_ParseTuple(PyTuple_GET_ITEM(smf, i), "Opp", &face, &bold, &italic)) return NULL;
if (!alloc_font(symbol_map_fonts + i, face, bold != 0, italic != 0, false)) return NULL;
}
for (size_t i = 0; i < symbol_maps_count; i++) {
unsigned int left, right, font_idx;
if (!PyArg_ParseTuple(PyTuple_GET_ITEM(sm, i), "III", &left, &right, &font_idx)) return NULL;
symbol_maps[i].left = left; symbol_maps[i].right = right; symbol_maps[i].font_idx = font_idx;
}
} }
for (size_t i = 0; i < fonts.symbol_maps_count; i++) {
unsigned int left, right, font_idx;
if (!PyArg_ParseTuple(PyTuple_GET_ITEM(sm, i), "III", &left, &right, &font_idx)) return NULL;
fonts.symbol_maps[i].left = left; fonts.symbol_maps[i].right = right; fonts.symbol_maps[i].font_idx = font_idx;
}
fonts.first_fallback_font_idx = fonts.fonts_count;
fonts.fallback_fonts_count = 0;
return update_cell_metrics(); return update_cell_metrics();
} }
@ -719,10 +761,8 @@ finalize(void) {
Py_CLEAR(python_send_to_gpu_impl); Py_CLEAR(python_send_to_gpu_impl);
free(canvas); free(canvas);
Py_CLEAR(box_drawing_function); Py_CLEAR(box_drawing_function);
free_font(&medium_font); free_font(&bold_font); free_font(&italic_font); free_font(&bi_font); free_font(&box_font); for (size_t i = 0; i < fonts.fonts_count; i++) del_font(fonts.fonts + i);
for (size_t i = 0; i < fallback_fonts_count; i++) free_font(fallback_fonts + i); free(fonts.symbol_maps); free(fonts.fonts);
for (size_t i = 0; i < symbol_map_fonts_count; i++) free_font(symbol_map_fonts + i);
free(symbol_maps); free(symbol_map_fonts); free(fallback_fonts);
if (harfbuzz_buffer) hb_buffer_destroy(harfbuzz_buffer); if (harfbuzz_buffer) hb_buffer_destroy(harfbuzz_buffer);
} }
@ -748,7 +788,7 @@ test_sprite_position_for(PyObject UNUSED *self, PyObject *args) {
uint64_t extra_glyphs = 0; uint64_t extra_glyphs = 0;
if (!PyArg_ParseTuple(args, "H|I", &glyph, &extra_glyphs)) return NULL; if (!PyArg_ParseTuple(args, "H|I", &glyph, &extra_glyphs)) return NULL;
int error; int error;
SpritePosition *pos = sprite_position_for(&medium_font, glyph, extra_glyphs, 0, &error); SpritePosition *pos = sprite_position_for(&fonts.fonts[fonts.medium_font_idx], glyph, extra_glyphs, 0, &error);
if (pos == NULL) { sprite_map_set_error(error); return NULL; } if (pos == NULL) { sprite_map_set_error(error); return NULL; }
return Py_BuildValue("HHH", pos->x, pos->y, pos->z); return Py_BuildValue("HHH", pos->x, pos->y, pos->z);
} }
@ -813,22 +853,18 @@ static PyObject*
current_fonts(PyObject UNUSED *self) { current_fonts(PyObject UNUSED *self) {
PyObject *ans = PyDict_New(); PyObject *ans = PyDict_New();
if (!ans) return NULL; if (!ans) return NULL;
#define SET(key, val) {if (PyDict_SetItemString(ans, #key, val) != 0) { goto error; }} #define SET(key, val) {if (PyDict_SetItemString(ans, #key, fonts.fonts[val].face) != 0) { goto error; }}
SET(medium, medium_font.face); SET(medium, fonts.medium_font_idx);
if (bold_font.face) SET(bold, bold_font.face); if (fonts.bold_font_idx) SET(bold, fonts.bold_font_idx);
if (italic_font.face) SET(italic, italic_font.face); if (fonts.italic_font_idx) SET(italic, fonts.italic_font_idx);
if (bi_font.face) SET(bi, bi_font.face); if (fonts.bi_font_idx) SET(bi, fonts.bi_font_idx);
int num = 0; PyObject *ff = PyTuple_New(fonts.fallback_fonts_count);
while (fallback_fonts[num].face) num++;
PyObject *ff = PyTuple_New(num);
if (!ff) goto error; if (!ff) goto error;
num = 0; for (size_t i = 0; i < fonts.fallback_fonts_count; i++) {
while (fallback_fonts[num].face) { Py_INCREF(fonts.fonts[fonts.first_fallback_font_idx + i].face);
Py_INCREF(fallback_fonts[num].face); PyTuple_SET_ITEM(ff, i, fonts.fonts[fonts.first_fallback_font_idx + i].face);
PyTuple_SET_ITEM(ff, num, fallback_fonts[num].face);
num++;
} }
SET(fallback, ff); PyDict_SetItemString(ans, "fallback", ff);
Py_CLEAR(ff); Py_CLEAR(ff);
return ans; return ans;
error: error:
@ -849,9 +885,9 @@ get_fallback_font(PyObject UNUSED *self, PyObject *args) {
if (PyUnicode_GetLength(text) > 2) cell.cc |= (char_buf[2] & CC_MASK) << 16; if (PyUnicode_GetLength(text) > 2) cell.cc |= (char_buf[2] & CC_MASK) << 16;
if (bold) cell.attrs |= 1 << BOLD_SHIFT; if (bold) cell.attrs |= 1 << BOLD_SHIFT;
if (italic) cell.attrs |= 1 << ITALIC_SHIFT; if (italic) cell.attrs |= 1 << ITALIC_SHIFT;
Font *ans = fallback_font(&cell); ssize_t ans = fallback_font(&cell);
if (ans == NULL) { PyErr_SetString(PyExc_ValueError, "Too many fallback fonts"); return NULL; } if (ans < 0) { PyErr_SetString(PyExc_ValueError, "Too many fallback fonts"); return NULL; }
return ans->face; return fonts.fonts[ans].face;
} }