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Checkpoint/switch/source/SDL_FontCache.c
BernardoGiordano 94d1932ce7 I should start committing this stuff
2019-04-15 22:03:56 +02:00

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/*
SDL_FontCache: A font cache for SDL and SDL_ttf
by Jonathan Dearborn
See SDL_FontCache.h for license info.
*/
#include "SDL_FontCache.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define FC_GET_ALPHA(sdl_color) ((sdl_color).a)
#define FC_MIN(a,b) ((a) < (b)? (a) : (b))
#define FC_MAX(a,b) ((a) > (b)? (a) : (b))
#define FC_EXTRACT_VARARGS(buffer, start_args) \
{ \
va_list lst; \
va_start(lst, start_args); \
vsnprintf(buffer, fc_buffer_size, start_args, lst); \
va_end(lst); \
}
// Extra pixels of padding around each glyph to avoid linear filtering artifacts
#define FC_CACHE_PADDING 1
static Uint8 has_clip(FC_Target* dest)
{
return SDL_RenderIsClipEnabled(dest);
}
static FC_Rect get_clip(FC_Target* dest)
{
SDL_Rect r;
SDL_RenderGetClipRect(dest, &r);
return r;
}
static void set_clip(FC_Target* dest, FC_Rect* rect)
{
SDL_RenderSetClipRect(dest, rect);
}
static void set_color(FC_Image* src, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
SDL_SetTextureColorMod(src, r, g, b);
SDL_SetTextureAlphaMod(src, a);
}
static char* new_concat(const char* a, const char* b)
{
// Create new buffer
unsigned int size = strlen(a) + strlen(b);
char* new_string = (char*)malloc(size+1);
// Concatenate strings in the new buffer
strcpy(new_string, a);
strcat(new_string, b);
return new_string;
}
static char* replace_concat(char** a, const char* b)
{
char* new_string = new_concat(*a, b);
free(*a);
*a = new_string;
return *a;
}
// Shared buffer for variadic text
static char* fc_buffer = NULL;
static unsigned int fc_buffer_size = 1024;
static Uint8 fc_has_render_target_support = 0;
char* FC_GetStringASCII(void)
{
static char* buffer = NULL;
if(buffer == NULL)
{
int i;
char c;
buffer = (char*)malloc(512);
memset(buffer, 0, 512);
i = 0;
c = 32;
while(1)
{
buffer[i] = c;
if(c == 126)
break;
++i;
++c;
}
}
return U8_strdup(buffer);
}
FC_Rect FC_MakeRect(float x, float y, float w, float h)
{
FC_Rect r = {x, y, w, h};
return r;
}
FC_Scale FC_MakeScale(float x, float y)
{
FC_Scale s = {x, y};
return s;
}
SDL_Color FC_MakeColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
SDL_Color c = {r, g, b, a};
return c;
}
FC_Effect FC_MakeEffect(FC_AlignEnum alignment, FC_Scale scale, SDL_Color color)
{
FC_Effect e;
e.alignment = alignment;
e.scale = scale;
e.color = color;
return e;
}
FC_GlyphData FC_MakeGlyphData(int cache_level, Sint16 x, Sint16 y, Uint16 w, Uint16 h)
{
FC_GlyphData gd;
gd.rect.x = x;
gd.rect.y = y;
gd.rect.w = w;
gd.rect.h = h;
gd.cache_level = cache_level;
return gd;
}
// Enough to hold all of the ascii characters and some.
#define FC_DEFAULT_NUM_BUCKETS 300
typedef struct FC_MapNode
{
Uint32 key;
FC_GlyphData value;
struct FC_MapNode* next;
} FC_MapNode;
typedef struct FC_Map
{
int num_buckets;
FC_MapNode** buckets;
} FC_Map;
static FC_Map* FC_MapCreate(int num_buckets)
{
int i;
FC_Map* map = (FC_Map*)malloc(sizeof(FC_Map));
map->num_buckets = num_buckets;
map->buckets = (FC_MapNode**)malloc(num_buckets * sizeof(FC_MapNode*));
for(i = 0; i < num_buckets; ++i)
{
map->buckets[i] = NULL;
}
return map;
}
static void FC_MapFree(FC_Map* map)
{
int i;
if(map == NULL)
return;
// Go through each bucket
for(i = 0; i < map->num_buckets; ++i)
{
// Delete the nodes in order
FC_MapNode* node = map->buckets[i];
while(node != NULL)
{
FC_MapNode* last = node;
node = node->next;
free(last);
}
}
free(map->buckets);
free(map);
}
// Note: Does not handle duplicates in any special way.
static FC_GlyphData* FC_MapInsert(FC_Map* map, Uint32 codepoint, FC_GlyphData glyph)
{
Uint32 index;
FC_MapNode* node;
if(map == NULL)
return NULL;
// Get index for bucket
index = codepoint % map->num_buckets;
// If this bucket is empty, create a node and return its value
if(map->buckets[index] == NULL)
{
node = map->buckets[index] = (FC_MapNode*)malloc(sizeof(FC_MapNode));
node->key = codepoint;
node->value = glyph;
node->next = NULL;
return &node->value;
}
for(node = map->buckets[index]; node != NULL; node = node->next)
{
// Find empty node and add a new one on.
if(node->next == NULL)
{
node->next = (FC_MapNode*)malloc(sizeof(FC_MapNode));
node = node->next;
node->key = codepoint;
node->value = glyph;
node->next = NULL;
return &node->value;
}
}
return NULL;
}
static FC_GlyphData* FC_MapFind(FC_Map* map, Uint32 codepoint)
{
Uint32 index;
FC_MapNode* node;
if(map == NULL)
return NULL;
// Get index for bucket
index = codepoint % map->num_buckets;
// Go through list until we find a match
for(node = map->buckets[index]; node != NULL; node = node->next)
{
if(node->key == codepoint)
return &node->value;
}
return NULL;
}
struct FC_Font
{
SDL_Renderer* renderer;
TTF_Font* ttf_source; // TTF_Font source of characters
TTF_Font* ttf_ext; // TTF_Font source of system symbols
Uint8 owns_ttf_source; // Can we delete the TTF_Font ourselves?
FC_FilterEnum filter;
SDL_Color default_color;
Uint16 height;
Uint16 maxWidth;
Uint16 baseline;
int ascent;
int descent;
int lineSpacing;
int letterSpacing;
// Uses 32-bit (4-byte) Unicode codepoints to refer to each glyph
// Codepoints are little endian (reversed from UTF-8) so that something like 0x00000005 is ASCII 5 and the map can be indexed by ASCII values
FC_Map* glyphs;
FC_GlyphData last_glyph; // Texture packing cursor
int glyph_cache_size;
int glyph_cache_count;
FC_Image** glyph_cache;
char* loading_string;
};
// Private
static FC_GlyphData* FC_PackGlyphData(FC_Font* font, Uint32 codepoint, Uint16 width, Uint16 maxWidth, Uint16 maxHeight);
static FC_Rect FC_RenderLeft(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* text);
static FC_Rect FC_RenderCenter(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* text);
static FC_Rect FC_RenderRight(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* text);
static inline SDL_Surface* FC_CreateSurface32(Uint32 width, Uint32 height)
{
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
return SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
#else
return SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
#endif
}
char* U8_alloc(unsigned int size)
{
char* result;
if(size == 0)
return NULL;
result = (char*)malloc(size);
result[0] = '\0';
return result;
}
void U8_free(char* string)
{
free(string);
}
char* U8_strdup(const char* string)
{
char* result;
if(string == NULL)
return NULL;
result = (char*)malloc(strlen(string)+1);
strcpy(result, string);
return result;
}
int U8_strlen(const char* string)
{
int length = 0;
if(string == NULL)
return 0;
while(*string != '\0')
{
string = U8_next(string);
++length;
}
return length;
}
int U8_charsize(const char* character)
{
if(character == NULL)
return 0;
if((unsigned char)*character <= 0x7F)
return 1;
else if((unsigned char)*character < 0xE0)
return 2;
else if((unsigned char)*character < 0xF0)
return 3;
else
return 4;
return 1;
}
int U8_charcpy(char* buffer, const char* source, int buffer_size)
{
int charsize;
if(buffer == NULL || source == NULL || buffer_size < 1)
return 0;
charsize = U8_charsize(source);
if(charsize > buffer_size)
return 0;
memcpy(buffer, source, charsize);
return charsize;
}
const char* U8_next(const char* string)
{
return string + U8_charsize(string);
}
int U8_strinsert(char* string, int position, const char* source, int max_bytes)
{
int pos_bytes;
int len;
int add_len;
int ulen;
if(string == NULL || source == NULL)
return 0;
len = strlen(string);
add_len = strlen(source);
ulen = U8_strlen(string);
if(position == -1)
position = ulen;
if(position < 0 || position > ulen || len + add_len + 1 > max_bytes)
return 0;
// Move string pointer to the proper position
pos_bytes = 0;
while(*string != '\0' && pos_bytes < position)
{
string = (char*)U8_next(string);
++pos_bytes;
}
// Move the rest of the string out of the way
memmove(string + add_len, string, len - pos_bytes + 1);
// Copy in the new characters
memcpy(string, source, add_len);
return 1;
}
void U8_strdel(char* string, int position)
{
if(string == NULL || position < 0)
return;
while(*string != '\0')
{
if(position == 0)
{
int chars_to_erase = U8_charsize(string);
int remaining_bytes = strlen(string) + 1;
memmove(string, string + chars_to_erase, remaining_bytes);
break;
}
string = (char*)U8_next(string);
--position;
}
}
static inline FC_Rect FC_RectUnion(FC_Rect A, FC_Rect B)
{
float x,x2,y,y2;
x = FC_MIN(A.x, B.x);
y = FC_MIN(A.y, B.y);
x2 = FC_MAX(A.x+A.w, B.x+B.w);
y2 = FC_MAX(A.y+A.h, B.y+B.h);
{
FC_Rect result = {x, y, FC_MAX(0, x2 - x), FC_MAX(0, y2 - y)};
return result;
}
}
// Adapted from SDL_IntersectRect
static inline FC_Rect FC_RectIntersect(FC_Rect A, FC_Rect B)
{
FC_Rect result;
float Amin, Amax, Bmin, Bmax;
// Horizontal intersection
Amin = A.x;
Amax = Amin + A.w;
Bmin = B.x;
Bmax = Bmin + B.w;
if(Bmin > Amin)
Amin = Bmin;
result.x = Amin;
if(Bmax < Amax)
Amax = Bmax;
result.w = Amax - Amin > 0 ? Amax - Amin : 0;
// Vertical intersection
Amin = A.y;
Amax = Amin + A.h;
Bmin = B.y;
Bmax = Bmin + B.h;
if(Bmin > Amin)
Amin = Bmin;
result.y = Amin;
if(Bmax < Amax)
Amax = Bmax;
result.h = Amax - Amin > 0 ? Amax - Amin : 0;
return result;
}
FC_Rect FC_DefaultRenderCallback(FC_Image* src, FC_Rect* srcrect, FC_Target* dest, float x, float y, float xscale, float yscale)
{
float w = srcrect->w * xscale;
float h = srcrect->h * yscale;
FC_Rect result;
// FIXME: Why does the scaled offset look so wrong?
{
SDL_RendererFlip flip = SDL_FLIP_NONE;
if(xscale < 0)
{
xscale = -xscale;
flip = (SDL_RendererFlip) ((int)flip | (int)SDL_FLIP_HORIZONTAL);
}
if(yscale < 0)
{
yscale = -yscale;
flip = (SDL_RendererFlip) ((int)flip | (int)SDL_FLIP_VERTICAL);
}
SDL_Rect r = *srcrect;
SDL_Rect dr = {(int)x, (int)y, (int)(xscale*r.w), (int)(yscale*r.h)};
SDL_RenderCopyEx(dest, src, &r, &dr, 0, NULL, flip);
}
result.x = x;
result.y = y;
result.w = w;
result.h = h;
return result;
}
static FC_Rect (*fc_render_callback)(FC_Image* src, FC_Rect* srcrect, FC_Target* dest, float x, float y, float xscale, float yscale) = &FC_DefaultRenderCallback;
void FC_SetRenderCallback(FC_Rect (*callback)(FC_Image* src, FC_Rect* srcrect, FC_Target* dest, float x, float y, float xscale, float yscale))
{
if(callback == NULL)
fc_render_callback = &FC_DefaultRenderCallback;
else
fc_render_callback = callback;
}
void FC_GetUTF8FromCodepoint(char* result, Uint32 codepoint)
{
char a, b, c, d;
if(result == NULL)
return;
a = (codepoint >> 24) & 0xFF;
b = (codepoint >> 16) & 0xFF;
c = (codepoint >> 8) & 0xFF;
d = codepoint & 0xFF;
if(a == 0)
{
if(b == 0)
{
if(c == 0)
{
result[0] = d;
result[1] = '\0';
}
else
{
result[0] = c;
result[1] = d;
result[2] = '\0';
}
}
else
{
result[0] = b;
result[1] = c;
result[2] = d;
result[3] = '\0';
}
}
else
{
result[0] = a;
result[1] = b;
result[2] = c;
result[3] = d;
result[4] = '\0';
}
}
Uint32 FC_GetCodepointFromUTF8(const char** c, Uint8 advance_pointer)
{
Uint32 result = 0;
const char* str;
if(c == NULL || *c == NULL)
return 0;
str = *c;
if((unsigned char)*str <= 0x7F)
result = *str;
else if((unsigned char)*str < 0xE0)
{
result |= (unsigned char)(*str) << 8;
result |= (unsigned char)(*(str+1));
if(advance_pointer)
*c += 1;
}
else if((unsigned char)*str < 0xF0)
{
result |= (unsigned char)(*str) << 16;
result |= (unsigned char)(*(str+1)) << 8;
result |= (unsigned char)(*(str+2));
if(advance_pointer)
*c += 2;
}
else
{
result |= (unsigned char)(*str) << 24;
result |= (unsigned char)(*(str+1)) << 16;
result |= (unsigned char)(*(str+2)) << 8;
result |= (unsigned char)(*(str+3));
if(advance_pointer)
*c += 3;
}
return result;
}
void FC_SetLoadingString(FC_Font* font, const char* string)
{
if(font == NULL)
return;
free(font->loading_string);
font->loading_string = U8_strdup(string);
}
unsigned int FC_GetBufferSize(void)
{
return fc_buffer_size;
}
void FC_SetBufferSize(unsigned int size)
{
free(fc_buffer);
if(size > 0)
{
fc_buffer_size = size;
fc_buffer = (char*)malloc(fc_buffer_size);
}
else
fc_buffer = (char*)malloc(fc_buffer_size);
}
// Constructors
static void FC_Init(FC_Font* font)
{
if(font == NULL)
return;
font->renderer = NULL;
font->ttf_source = NULL;
font->ttf_ext = NULL;
font->owns_ttf_source = 0;
font->filter = FC_FILTER_NEAREST;
font->default_color.r = 0;
font->default_color.g = 0;
font->default_color.b = 0;
FC_GET_ALPHA(font->default_color) = 255;
font->height = 0; // ascent+descent
font->maxWidth = 0;
font->baseline = 0;
font->ascent = 0;
font->descent = 0;
font->lineSpacing = 0;
font->letterSpacing = 0;
// Give a little offset for when filtering/mipmaps are used. Depending on mipmap level, this will still not be enough.
font->last_glyph.rect.x = FC_CACHE_PADDING;
font->last_glyph.rect.y = FC_CACHE_PADDING;
font->last_glyph.rect.w = 0;
font->last_glyph.rect.h = 0;
font->last_glyph.cache_level = 0;
if(font->glyphs != NULL)
FC_MapFree(font->glyphs);
font->glyphs = FC_MapCreate(FC_DEFAULT_NUM_BUCKETS);
font->glyph_cache_size = 3;
font->glyph_cache_count = 0;
font->glyph_cache = (FC_Image**)malloc(font->glyph_cache_size * sizeof(FC_Image*));
if (font->loading_string == NULL)
font->loading_string = FC_GetStringASCII();
if(fc_buffer == NULL)
fc_buffer = (char*)malloc(fc_buffer_size);
}
static Uint8 FC_GrowGlyphCache(FC_Font* font)
{
if(font == NULL)
return 0;
SDL_Texture* new_level = SDL_CreateTexture(font->renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, font->height * 12, font->height * 12);
if(new_level == NULL || !FC_SetGlyphCacheLevel(font, font->glyph_cache_count, new_level))
{
FC_Log("Error: SDL_FontCache ran out of packing space and could not add another cache level.\n");
SDL_DestroyTexture(new_level);
return 0;
}
return 1;
}
Uint8 FC_UploadGlyphCache(FC_Font* font, int cache_level, SDL_Surface* data_surface)
{
if(font == NULL || data_surface == NULL)
return 0;
SDL_Texture* new_level;
if(!fc_has_render_target_support)
new_level = SDL_CreateTextureFromSurface(font->renderer, data_surface);
else
{
// Must upload with render target enabled so we can put more glyphs on later
SDL_Renderer* renderer = font->renderer;
// Set filter mode for new texture
char old_filter_mode[16]; // Save it so we can change the hint value in the meantime
snprintf(old_filter_mode, 16, "%s", SDL_GetHint(SDL_HINT_RENDER_SCALE_QUALITY));
if(FC_GetFilterMode(font) == FC_FILTER_LINEAR)
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1");
else
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "0");
new_level = SDL_CreateTexture(renderer, data_surface->format->format, SDL_TEXTUREACCESS_TARGET, data_surface->w, data_surface->h);
SDL_SetTextureBlendMode(new_level, SDL_BLENDMODE_BLEND);
// Reset filter mode for the temp texture
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "0");
Uint8 r, g, b, a;
SDL_Texture* temp = SDL_CreateTextureFromSurface(renderer, data_surface);
SDL_SetTextureBlendMode(temp, SDL_BLENDMODE_NONE);
SDL_SetRenderTarget(renderer, new_level);
SDL_GetRenderDrawColor(renderer, &r, &g, &b, &a);
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
SDL_RenderClear(renderer);
SDL_SetRenderDrawColor(renderer, r, g, b, a);
SDL_RenderCopy(renderer, temp, NULL, NULL);
SDL_SetRenderTarget(renderer, NULL);
SDL_DestroyTexture(temp);
// Reset to the old filter value
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, old_filter_mode);
}
if(new_level == NULL || !FC_SetGlyphCacheLevel(font, cache_level, new_level))
{
FC_Log("Error: SDL_FontCache ran out of packing space and could not add another cache level.\n");
SDL_DestroyTexture(new_level);
return 0;
}
return 1;
}
static FC_GlyphData* FC_PackGlyphData(FC_Font* font, Uint32 codepoint, Uint16 width, Uint16 maxWidth, Uint16 maxHeight)
{
FC_Map* glyphs = font->glyphs;
FC_GlyphData* last_glyph = &font->last_glyph;
Uint16 height = font->height + FC_CACHE_PADDING;
if(last_glyph->rect.x + last_glyph->rect.w + width >= maxWidth - FC_CACHE_PADDING)
{
if(last_glyph->rect.y + height + height >= maxHeight - FC_CACHE_PADDING)
{
// Get ready to pack on the next cache level when it is ready
last_glyph->cache_level = font->glyph_cache_count;
last_glyph->rect.x = FC_CACHE_PADDING;
last_glyph->rect.y = FC_CACHE_PADDING;
last_glyph->rect.w = 0;
return NULL;
}
else
{
// Go to next row
last_glyph->rect.x = FC_CACHE_PADDING;
last_glyph->rect.y += height;
last_glyph->rect.w = 0;
}
}
// Move to next space
last_glyph->rect.x += last_glyph->rect.w + 1 + FC_CACHE_PADDING;
last_glyph->rect.w = width;
return FC_MapInsert(glyphs, codepoint, FC_MakeGlyphData(last_glyph->cache_level, last_glyph->rect.x, last_glyph->rect.y, last_glyph->rect.w, last_glyph->rect.h));
}
FC_Image* FC_GetGlyphCacheLevel(FC_Font* font, int cache_level)
{
if(font == NULL || cache_level < 0 || cache_level > font->glyph_cache_count)
return NULL;
return font->glyph_cache[cache_level];
}
Uint8 FC_SetGlyphCacheLevel(FC_Font* font, int cache_level, FC_Image* cache_texture)
{
if(font == NULL || cache_level < 0)
return 0;
// Must be sequentially added
if(cache_level > font->glyph_cache_count + 1)
return 0;
if(cache_level == font->glyph_cache_count)
{
font->glyph_cache_count++;
// Grow cache?
if(font->glyph_cache_count > font->glyph_cache_size)
{
// Copy old cache to new one
int i;
FC_Image** new_cache;
new_cache = (FC_Image**)malloc(font->glyph_cache_count * sizeof(FC_Image*));
for(i = 0; i < font->glyph_cache_size; ++i)
new_cache[i] = font->glyph_cache[i];
// Save new cache
free(font->glyph_cache);
font->glyph_cache_size = font->glyph_cache_count;
font->glyph_cache = new_cache;
}
}
font->glyph_cache[cache_level] = cache_texture;
return 1;
}
FC_Font* FC_CreateFont(void)
{
FC_Font* font;
font = (FC_Font*)malloc(sizeof(FC_Font));
memset(font, 0, sizeof(FC_Font));
FC_Init(font);
return font;
}
// Assume this many will be enough...
#define FC_LOAD_MAX_SURFACES 10
static void FC_LoadGlyphsFromTTF(FC_Font* font, TTF_Font* ttf, SDL_Surface** surfaces, int* num_surfaces, int w, int h)
{
Uint8 packed = 0;
SDL_Surface* glyph_surf;
SDL_Color white = {255, 255, 255, 255};
char buff[5] = {0};
const char* buff_ptr = buff;
const char* source_string = font->loading_string;
for(; *source_string != '\0'; source_string = U8_next(source_string))
{
if(!U8_charcpy(buff, source_string, 5))
continue;
glyph_surf = TTF_RenderUTF8_Blended(ttf, buff, white);
if(glyph_surf == NULL)
continue;
// Try packing. If it fails, create a new surface for the next cache level.
packed = (FC_PackGlyphData(font, FC_GetCodepointFromUTF8(&buff_ptr, 0), glyph_surf->w, surfaces[*num_surfaces-1]->w, surfaces[*num_surfaces-1]->h) != NULL);
if(!packed)
{
int i = *num_surfaces-1;
if(*num_surfaces >= FC_LOAD_MAX_SURFACES)
{
// Can't do any more!
FC_Log("SDL_FontCache error: Could not create enough cache surfaces to fit all of the loading string!\n");
SDL_FreeSurface(glyph_surf);
break;
}
// Upload the current surface to the glyph cache now so we can keep the cache level packing cursor up to date as we go.
FC_UploadGlyphCache(font, i, surfaces[i]);
SDL_FreeSurface(surfaces[i]);
SDL_SetTextureBlendMode(font->glyph_cache[i], SDL_BLENDMODE_BLEND);
// Update the glyph cursor to the new cache level. We need to do this here because the actual cache lags behind our use of the packing above.
font->last_glyph.cache_level = *num_surfaces;
surfaces[*num_surfaces] = FC_CreateSurface32(w, h);
*num_surfaces++;
}
// Try packing for the new surface, then blit onto it.
if(packed || FC_PackGlyphData(font, FC_GetCodepointFromUTF8(&buff_ptr, 0), glyph_surf->w, surfaces[*num_surfaces-1]->w, surfaces[*num_surfaces-1]->h) != NULL)
{
SDL_SetSurfaceBlendMode(glyph_surf, SDL_BLENDMODE_NONE);
SDL_Rect srcRect = {0, 0, glyph_surf->w, glyph_surf->h};
SDL_Rect destrect = font->last_glyph.rect;
SDL_BlitSurface(glyph_surf, &srcRect, surfaces[*num_surfaces-1], &destrect);
}
SDL_FreeSurface(glyph_surf);
}
}
Uint8 FC_LoadFontFromTTF(FC_Font* font, SDL_Renderer* renderer, TTF_Font* ttf, TTF_Font* ext, SDL_Color color)
{
if(font == NULL || ttf == NULL || ext == NULL)
return 0;
if(renderer == NULL)
return 0;
FC_ClearFont(font);
// Might as well check render target support here
SDL_RendererInfo info;
SDL_GetRendererInfo(renderer, &info);
fc_has_render_target_support = (info.flags & SDL_RENDERER_TARGETTEXTURE);
font->renderer = renderer;
font->ttf_source = ttf;
font->ttf_ext = ext;
//font->line_height = TTF_FontLineSkip(ttf);
font->height = TTF_FontHeight(ttf) + 0.16666666666 * TTF_FontHeight(ttf);
font->ascent = TTF_FontAscent(ttf);
font->descent = -TTF_FontDescent(ttf);
font->baseline = font->height - font->descent;
font->default_color = color;
// Copy glyphs from the surface to the font texture and store the position data
// Pack row by row into a square texture
// Try figuring out dimensions that make sense for the font size.
unsigned int w = font->height*12;
unsigned int h = font->height*12;
SDL_Surface* surfaces[FC_LOAD_MAX_SURFACES];
int num_surfaces = 1;
surfaces[0] = FC_CreateSurface32(w, h);
font->last_glyph.rect.x = FC_CACHE_PADDING;
font->last_glyph.rect.y = FC_CACHE_PADDING;
font->last_glyph.rect.w = 0;
font->last_glyph.rect.h = font->height;
// load standard glyphs
FC_LoadGlyphsFromTTF(font, ttf, surfaces, &num_surfaces, w, h);
// load system symbols
FC_SetLoadingString(font,
"\ue000\ue001\ue002\ue003\ue004\ue005\ue006\ue041\ue045\ue046\ue085\ue086\ue058\ue080"
// TODO: figure out why it crashes while loading the whole symbols
// "\ue000\ue001\ue002\ue003\ue004\ue005\ue006\ue007\ue008\ue009\ue00a\ue00b\ue00c\ue00d\ue00e\ue00f"
// "\ue010\ue011\ue012\ue013\ue014\ue015\ue016\ue017\ue018\ue019\ue01a\ue01b\ue01c\ue01d\ue01e\ue01f"
// "\ue020\ue021\ue022\ue023\ue024\ue025\ue026\ue027\ue028\ue029\ue02a\ue02b\ue02c\ue02d\ue02e\ue02f"
// "\ue030\ue031\ue032\ue033\ue034\ue035\ue036\ue037\ue038\ue039\ue03a\ue03b\ue03c\ue03d\ue03e\ue03f"
// "\ue040\ue041\ue042\ue043\ue044\ue045\ue046\ue047\ue048\ue049\ue04a\ue04b\ue04c\ue04d\ue04e\ue04f"
// "\ue050\ue051\ue052\ue053\ue054\ue055\ue056\ue057\ue058\ue059\ue05a\ue05b\ue05c\ue05d\ue05e\ue05f"
// "\ue060\ue061\ue062\ue063\ue064\ue065\ue066\ue067\ue068\ue069\ue06a\ue06b"
// "\ue070\ue071\ue072\ue073\ue074\ue075\ue076\ue077\ue078\ue079\ue07a\ue07b\ue07c\ue07d\ue07e"
// "\ue080\ue081\ue082\ue083\ue084\ue085\ue086\ue087\ue088\ue089\ue08a\ue08b\ue08c\ue08d\ue08e\ue08f"
// "\ue090\ue091\ue092\ue093\ue094\ue095\ue096\ue097\ue098\ue099"
// "\ue0a0\ue0a1\ue0a2\ue0a3\ue0a4\ue0a5\ue0a6\ue0a7\ue0a8\ue0a9\ue0aa\ue0ab\ue0ac\ue0ad\ue0ae\ue0af"
// "\ue0b0\ue0b1\ue0b2\ue0b3\ue0b4\ue0b5\ue0b6\ue0b7\ue0b8\ue0b9\ue0ba"
// "\ue0c0\ue0c1\ue0c2\ue0c3\ue0c4\ue0c5\ue0c6\ue0c7\ue0c8\ue0c9"
// "\ue0d0\ue0d1\ue0d2\ue0d3\ue0d4\ue0d5\ue0d6"
// "\ue0e0\ue0e1\ue0e2\ue0e3\ue0e4\ue0e5\ue0e6\ue0e7\ue0e8\ue0e9\ue0ea\ue0eb\ue0ec\ue0ed\ue0ee\ue0ef"
// "\ue0f0\ue0f1\ue0f2\ue0f3\ue0f4\ue0f5"
// "\ue100\ue101\ue102\ue103\ue104\ue105"
// "\ue110\ue111\ue112\ue113\ue114\ue115\ue116"
// "\ue120\ue121\ue122\ue123\ue124\ue125\ue126\ue127\ue128\ue129\ue12a\ue12b\ue12c"
// "\ue130\ue131\ue132\ue133\ue134\ue135\ue136\ue137\ue138\ue139\ue13a\ue13b\ue13c"
// "\ue140\ue141\ue142\ue143\ue144\ue145\ue146\ue147\ue148\ue149\ue14a\ue14b\ue14c"
// "\ue150\ue151\ue152"
);
FC_LoadGlyphsFromTTF(font, ext, surfaces, &num_surfaces, w, h);
int i = num_surfaces-1;
FC_UploadGlyphCache(font, i, surfaces[i]);
SDL_FreeSurface(surfaces[i]);
SDL_SetTextureBlendMode(font->glyph_cache[i], SDL_BLENDMODE_BLEND);
return 1;
}
Uint8 FC_LoadFont_RW(FC_Font* font, FC_Target* renderer, SDL_RWops* file_rwops_ttf, SDL_RWops* file_rwops_ext, Uint8 own_rwops, Uint32 pointSize, SDL_Color color, int style)
{
Uint8 result;
TTF_Font* ttf;
TTF_Font* ext;
Uint8 outline;
if(font == NULL)
return 0;
if(!TTF_WasInit() && TTF_Init() < 0)
{
FC_Log("Unable to initialize SDL_ttf: %s \n", TTF_GetError());
if(own_rwops) {
SDL_RWclose(file_rwops_ttf);
SDL_RWclose(file_rwops_ext);
}
return 0;
}
ttf = TTF_OpenFontRW(file_rwops_ttf, own_rwops, pointSize);
ext = TTF_OpenFontRW(file_rwops_ext, own_rwops, pointSize);
if(ttf == NULL || ext == NULL)
{
FC_Log("Unable to load TrueType font: %s \n", TTF_GetError());
if(own_rwops) {
SDL_RWclose(file_rwops_ttf);
SDL_RWclose(file_rwops_ext);
}
return 0;
}
outline = (style & TTF_STYLE_OUTLINE);
if(outline)
{
style &= ~TTF_STYLE_OUTLINE;
TTF_SetFontOutline(ttf, 1);
TTF_SetFontOutline(ext, 1);
}
TTF_SetFontStyle(ttf, style);
TTF_SetFontStyle(ext, style);
result = FC_LoadFontFromTTF(font, renderer, ttf, ext, color);
// Can only load new (uncached) glyphs if we can keep the SDL_RWops open.
font->owns_ttf_source = own_rwops;
if(!own_rwops)
{
TTF_CloseFont(font->ttf_source);
TTF_CloseFont(font->ttf_ext);
font->ttf_source = NULL;
font->ttf_ext = NULL;
}
return result;
}
void FC_ClearFont(FC_Font* font)
{
int i;
if(font == NULL)
return;
// Release resources
if(font->owns_ttf_source) {
TTF_CloseFont(font->ttf_source);
TTF_CloseFont(font->ttf_ext);
}
font->owns_ttf_source = 0;
font->ttf_source = NULL;
font->ttf_ext = NULL;
// Delete glyph map
FC_MapFree(font->glyphs);
font->glyphs = NULL;
// Delete glyph cache
for(i = 0; i < font->glyph_cache_count; ++i)
{
SDL_DestroyTexture(font->glyph_cache[i]);
}
free(font->glyph_cache);
font->glyph_cache = NULL;
// Reset font
FC_Init(font);
}
void FC_FreeFont(FC_Font* font)
{
int i;
if(font == NULL)
return;
// Release resources
if(font->owns_ttf_source) {
TTF_CloseFont(font->ttf_source);
TTF_CloseFont(font->ttf_ext);
}
// Delete glyph map
FC_MapFree(font->glyphs);
// Delete glyph cache
for(i = 0; i < font->glyph_cache_count; ++i)
{
SDL_DestroyTexture(font->glyph_cache[i]);
}
free(font->glyph_cache);
free(font->loading_string);
free(font);
}
int FC_GetNumCacheLevels(FC_Font* font)
{
return font->glyph_cache_count;
}
Uint8 FC_AddGlyphToCache(FC_Font* font, SDL_Surface* glyph_surface)
{
if(font == NULL || glyph_surface == NULL)
return 0;
SDL_SetSurfaceBlendMode(glyph_surface, SDL_BLENDMODE_NONE);
FC_Image* dest = FC_GetGlyphCacheLevel(font, font->last_glyph.cache_level);
if(dest == NULL)
return 0;
{
SDL_Renderer* renderer = font->renderer;
Uint8 use_clip;
FC_Rect clip_rect;
SDL_Texture* img;
SDL_Rect destrect;
use_clip = has_clip(renderer);
if(use_clip)
{
clip_rect = get_clip(renderer);
set_clip(renderer, NULL);
}
img = SDL_CreateTextureFromSurface(renderer, glyph_surface);
destrect = font->last_glyph.rect;
SDL_SetRenderTarget(renderer, dest);
SDL_RenderCopy(renderer, img, NULL, &destrect);
SDL_SetRenderTarget(renderer, NULL);
SDL_DestroyTexture(img);
if(use_clip)
set_clip(renderer, &clip_rect);
}
return 1;
}
unsigned int FC_GetNumCodepoints(FC_Font* font)
{
FC_Map* glyphs;
int i;
unsigned int result = 0;
if(font == NULL || font->glyphs == NULL)
return 0;
glyphs = font->glyphs;
for(i = 0; i < glyphs->num_buckets; ++i)
{
FC_MapNode* node;
for(node = glyphs->buckets[i]; node != NULL; node = node->next)
{
result++;
}
}
return result;
}
void FC_GetCodepoints(FC_Font* font, Uint32* result)
{
FC_Map* glyphs;
int i;
unsigned int count = 0;
if(font == NULL || font->glyphs == NULL)
return;
glyphs = font->glyphs;
for(i = 0; i < glyphs->num_buckets; ++i)
{
FC_MapNode* node;
for(node = glyphs->buckets[i]; node != NULL; node = node->next)
{
result[count] = node->key;
count++;
}
}
}
Uint8 FC_GetGlyphData(FC_Font* font, FC_GlyphData* result, Uint32 codepoint)
{
FC_GlyphData* e = FC_MapFind(font->glyphs, codepoint);
if(e == NULL)
{
char buff[5];
int w, h;
SDL_Color white = {255, 255, 255, 255};
SDL_Surface* surf;
FC_Image* cache_image;
if(font->ttf_source == NULL || font->ttf_ext)
return 0;
FC_GetUTF8FromCodepoint(buff, codepoint);
cache_image = FC_GetGlyphCacheLevel(font, font->last_glyph.cache_level);
if(cache_image == NULL)
{
FC_Log("SDL_FontCache: Failed to load cache image, so cannot add new glyphs!\n");
return 0;
}
SDL_QueryTexture(cache_image, NULL, NULL, &w, &h);
surf = TTF_RenderUTF8_Blended(codepoint >= 0xE000 ? font->ttf_ext : font->ttf_source, buff, white);
if(surf == NULL)
{
return 0;
}
e = FC_PackGlyphData(font, codepoint, surf->w, w, h);
if(e == NULL)
{
// Grow the cache
FC_GrowGlyphCache(font);
// Try packing again
e = FC_PackGlyphData(font, codepoint, surf->w, w, h);
if(e == NULL)
{
SDL_FreeSurface(surf);
return 0;
}
}
// Render onto the cache texture
FC_AddGlyphToCache(font, surf);
SDL_FreeSurface(surf);
}
if(result != NULL && e != NULL)
*result = *e;
return 1;
}
FC_GlyphData* FC_SetGlyphData(FC_Font* font, Uint32 codepoint, FC_GlyphData glyph_data)
{
return FC_MapInsert(font->glyphs, codepoint, glyph_data);
}
// Drawing
static FC_Rect FC_RenderLeft(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* text)
{
const char* c = text;
FC_Rect srcRect;
FC_Rect dstRect;
FC_Rect dirtyRect = FC_MakeRect(x, y, 0, 0);
FC_GlyphData glyph;
Uint32 codepoint;
float destX = x;
float destY = y;
float destH;
float destLineSpacing;
float destLetterSpacing;
if(font == NULL)
return dirtyRect;
destH = font->height * scale.y;
destLineSpacing = font->lineSpacing*scale.y;
destLetterSpacing = font->letterSpacing*scale.x;
if(c == NULL || font->glyph_cache_count == 0 || dest == NULL)
return dirtyRect;
int newlineX = x;
for(; *c != '\0'; c++)
{
if(*c == '\n')
{
destX = newlineX;
destY += destH + destLineSpacing;
continue;
}
codepoint = FC_GetCodepointFromUTF8(&c, 1); // Increments 'c' to skip the extra UTF-8 bytes
if(!FC_GetGlyphData(font, &glyph, codepoint))
{
codepoint = ' ';
if(!FC_GetGlyphData(font, &glyph, codepoint))
continue; // Skip bad characters
}
if (codepoint == ' ')
{
destX += glyph.rect.w*scale.x + destLetterSpacing;
continue;
}
/*if(destX >= dest->w)
continue;
if(destY >= dest->h)
continue;*/
srcRect = glyph.rect;
dstRect = fc_render_callback(FC_GetGlyphCacheLevel(font, glyph.cache_level), &srcRect, dest, destX, destY, scale.x, scale.y);
if(dirtyRect.w == 0 || dirtyRect.h == 0)
dirtyRect = dstRect;
else
dirtyRect = FC_RectUnion(dirtyRect, dstRect);
destX += glyph.rect.w*scale.x + destLetterSpacing;
}
return dirtyRect;
}
static void set_color_for_all_caches(FC_Font* font, SDL_Color color)
{
// TODO: How can I predict which glyph caches are to be used?
FC_Image* img;
int i;
int num_levels = FC_GetNumCacheLevels(font);
for(i = 0; i < num_levels; ++i)
{
img = FC_GetGlyphCacheLevel(font, i);
set_color(img, color.r, color.g, color.b, FC_GET_ALPHA(color));
}
}
FC_Rect FC_Draw(FC_Font* font, FC_Target* dest, float x, float y, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, font->default_color);
return FC_RenderLeft(font, dest, x, y, FC_MakeScale(1,1), fc_buffer);
}
typedef struct FC_StringList
{
char* value;
struct FC_StringList* next;
} FC_StringList;
void FC_StringListFree(FC_StringList* node)
{
// Delete the nodes in order
while(node != NULL)
{
FC_StringList* last = node;
node = node->next;
free(last->value);
free(last);
}
}
FC_StringList** FC_StringListPushBack(FC_StringList** node, char* value, Uint8 copy)
{
if(node == NULL)
{
return node;
}
// Get to the last node
while(*node != NULL)
{
node = &(*node)->next;
}
*node = (FC_StringList*)malloc(sizeof(FC_StringList));
(*node)->value = (copy? U8_strdup(value) : value);
(*node)->next = NULL;
return node;
}
static FC_StringList* FC_Explode(const char* text, char delimiter)
{
FC_StringList* head;
FC_StringList* new_node;
FC_StringList** node;
const char* start;
const char* end;
unsigned int size;
if(text == NULL)
return NULL;
head = NULL;
node = &head;
// Doesn't technically support UTF-8, but it's probably fine, right?
size = 0;
start = end = text;
while(1)
{
if(*end == delimiter || *end == '\0')
{
*node = (FC_StringList*)malloc(sizeof(FC_StringList));
new_node = *node;
new_node->value = (char*)malloc(size + 1);
memcpy(new_node->value, start, size);
new_node->value[size] = '\0';
new_node->next = NULL;
if(*end == '\0')
break;
node = &((*node)->next);
start = end+1;
size = 0;
}
else
++size;
++end;
}
return head;
}
static FC_StringList* FC_ExplodeAndKeep(const char* text, char delimiter)
{
FC_StringList* head;
FC_StringList* new_node;
FC_StringList** node;
const char* start;
const char* end;
unsigned int size;
if(text == NULL)
return NULL;
head = NULL;
node = &head;
// Doesn't technically support UTF-8, but it's probably fine, right?
size = 0;
start = end = text;
while(1)
{
if(*end == delimiter || *end == '\0')
{
*node = (FC_StringList*)malloc(sizeof(FC_StringList));
new_node = *node;
new_node->value = (char*)malloc(size + 1);
memcpy(new_node->value, start, size);
new_node->value[size] = '\0';
new_node->next = NULL;
if(*end == '\0')
break;
node = &((*node)->next);
start = end;
size = 1;
}
else
++size;
++end;
}
return head;
}
static void FC_RenderAlign(FC_Font* font, FC_Target* dest, float x, float y, int width, FC_Scale scale, FC_AlignEnum align, const char* text)
{
switch(align)
{
case FC_ALIGN_LEFT:
FC_RenderLeft(font, dest, x, y, scale, text);
break;
case FC_ALIGN_CENTER:
FC_RenderCenter(font, dest, x + width/2, y, scale, text);
break;
case FC_ALIGN_RIGHT:
FC_RenderRight(font, dest, x + width, y, scale, text);
break;
}
}
static FC_StringList* FC_GetBufferFitToColumn(FC_Font* font, int width, FC_Scale scale, Uint8 keep_newlines)
{
FC_StringList* result = NULL;
FC_StringList** current = &result;
FC_StringList *ls, *iter;
ls = (keep_newlines? FC_ExplodeAndKeep(fc_buffer, '\n') : FC_Explode(fc_buffer, '\n'));
for(iter = ls; iter != NULL; iter = iter->next)
{
char* line = iter->value;
// If line is too long, then add words one at a time until we go over.
if(width > 0 && FC_GetWidth(font, "%s", line) > width)
{
FC_StringList *words, *word_iter;
words = FC_Explode(line, ' ');
// Skip the first word for the iterator, so there will always be at least one word per line
line = new_concat(words->value, " ");
for(word_iter = words->next; word_iter != NULL; word_iter = word_iter->next)
{
char* line_plus_word = new_concat(line, word_iter->value);
char* word_plus_space = new_concat(word_iter->value, " ");
if(FC_GetWidth(font, "%s", line_plus_word) > width)
{
current = FC_StringListPushBack(current, line, 0);
line = word_plus_space;
}
else
{
replace_concat(&line, word_plus_space);
free(word_plus_space);
}
free(line_plus_word);
}
current = FC_StringListPushBack(current, line, 0);
FC_StringListFree(words);
}
else
{
current = FC_StringListPushBack(current, line, 0);
iter->value = NULL;
}
}
FC_StringListFree(ls);
return result;
}
static void FC_DrawColumnFromBuffer(FC_Font* font, FC_Target* dest, FC_Rect box, int* total_height, FC_Scale scale, FC_AlignEnum align)
{
int y = box.y;
FC_StringList *ls, *iter;
ls = FC_GetBufferFitToColumn(font, box.w, scale, 0);
for(iter = ls; iter != NULL; iter = iter->next)
{
FC_RenderAlign(font, dest, box.x, y, box.w, scale, align, iter->value);
y += FC_GetLineHeight(font);
}
FC_StringListFree(ls);
if(total_height != NULL)
*total_height = y - box.y;
}
FC_Rect FC_DrawBox(FC_Font* font, FC_Target* dest, FC_Rect box, const char* formatted_text, ...)
{
Uint8 useClip;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(box.x, box.y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
useClip = has_clip(dest);
FC_Rect oldclip, newclip;
if(useClip)
{
oldclip = get_clip(dest);
newclip = FC_RectIntersect(oldclip, box);
}
else
newclip = box;
set_clip(dest, &newclip);
set_color_for_all_caches(font, font->default_color);
FC_DrawColumnFromBuffer(font, dest, box, NULL, FC_MakeScale(1,1), FC_ALIGN_LEFT);
if(useClip)
set_clip(dest, &oldclip);
else
set_clip(dest, NULL);
return box;
}
FC_Rect FC_DrawBoxAlign(FC_Font* font, FC_Target* dest, FC_Rect box, FC_AlignEnum align, const char* formatted_text, ...)
{
Uint8 useClip;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(box.x, box.y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
useClip = has_clip(dest);
FC_Rect oldclip, newclip;
if(useClip)
{
oldclip = get_clip(dest);
newclip = FC_RectIntersect(oldclip, box);
}
else
newclip = box;
set_clip(dest, &newclip);
set_color_for_all_caches(font, font->default_color);
FC_DrawColumnFromBuffer(font, dest, box, NULL, FC_MakeScale(1,1), align);
if(useClip)
set_clip(dest, &oldclip);
else
set_clip(dest, NULL);
return box;
}
FC_Rect FC_DrawBoxScale(FC_Font* font, FC_Target* dest, FC_Rect box, FC_Scale scale, const char* formatted_text, ...)
{
Uint8 useClip;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(box.x, box.y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
useClip = has_clip(dest);
FC_Rect oldclip, newclip;
if(useClip)
{
oldclip = get_clip(dest);
newclip = FC_RectIntersect(oldclip, box);
}
else
newclip = box;
set_clip(dest, &newclip);
set_color_for_all_caches(font, font->default_color);
FC_DrawColumnFromBuffer(font, dest, box, NULL, scale, FC_ALIGN_LEFT);
if(useClip)
set_clip(dest, &oldclip);
else
set_clip(dest, NULL);
return box;
}
FC_Rect FC_DrawBoxColor(FC_Font* font, FC_Target* dest, FC_Rect box, SDL_Color color, const char* formatted_text, ...)
{
Uint8 useClip;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(box.x, box.y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
useClip = has_clip(dest);
FC_Rect oldclip, newclip;
if(useClip)
{
oldclip = get_clip(dest);
newclip = FC_RectIntersect(oldclip, box);
}
else
newclip = box;
set_clip(dest, &newclip);
set_color_for_all_caches(font, color);
FC_DrawColumnFromBuffer(font, dest, box, NULL, FC_MakeScale(1,1), FC_ALIGN_LEFT);
if(useClip)
set_clip(dest, &oldclip);
else
set_clip(dest, NULL);
return box;
}
FC_Rect FC_DrawBoxEffect(FC_Font* font, FC_Target* dest, FC_Rect box, FC_Effect effect, const char* formatted_text, ...)
{
Uint8 useClip;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(box.x, box.y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
useClip = has_clip(dest);
FC_Rect oldclip, newclip;
if(useClip)
{
oldclip = get_clip(dest);
newclip = FC_RectIntersect(oldclip, box);
}
else
newclip = box;
set_clip(dest, &newclip);
set_color_for_all_caches(font, effect.color);
FC_DrawColumnFromBuffer(font, dest, box, NULL, effect.scale, effect.alignment);
if(useClip)
set_clip(dest, &oldclip);
else
set_clip(dest, NULL);
return box;
}
FC_Rect FC_DrawColumn(FC_Font* font, FC_Target* dest, float x, float y, Uint16 width, const char* formatted_text, ...)
{
FC_Rect box = {x, y, width, 0};
int total_height;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, font->default_color);
FC_DrawColumnFromBuffer(font, dest, box, &total_height, FC_MakeScale(1,1), FC_ALIGN_LEFT);
return FC_MakeRect(box.x, box.y, width, total_height);
}
FC_Rect FC_DrawColumnAlign(FC_Font* font, FC_Target* dest, float x, float y, Uint16 width, FC_AlignEnum align, const char* formatted_text, ...)
{
FC_Rect box = {x, y, width, 0};
int total_height;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, font->default_color);
switch(align)
{
case FC_ALIGN_CENTER:
box.x -= width/2;
break;
case FC_ALIGN_RIGHT:
box.x -= width;
break;
default:
break;
}
FC_DrawColumnFromBuffer(font, dest, box, &total_height, FC_MakeScale(1,1), align);
return FC_MakeRect(box.x, box.y, width, total_height);
}
FC_Rect FC_DrawColumnScale(FC_Font* font, FC_Target* dest, float x, float y, Uint16 width, FC_Scale scale, const char* formatted_text, ...)
{
FC_Rect box = {x, y, width, 0};
int total_height;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, font->default_color);
FC_DrawColumnFromBuffer(font, dest, box, &total_height, scale, FC_ALIGN_LEFT);
return FC_MakeRect(box.x, box.y, width, total_height);
}
FC_Rect FC_DrawColumnColor(FC_Font* font, FC_Target* dest, float x, float y, Uint16 width, SDL_Color color, const char* formatted_text, ...)
{
FC_Rect box = {x, y, width, 0};
int total_height;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, color);
FC_DrawColumnFromBuffer(font, dest, box, &total_height, FC_MakeScale(1,1), FC_ALIGN_LEFT);
return FC_MakeRect(box.x, box.y, width, total_height);
}
FC_Rect FC_DrawColumnEffect(FC_Font* font, FC_Target* dest, float x, float y, Uint16 width, FC_Effect effect, const char* formatted_text, ...)
{
FC_Rect box = {x, y, width, 0};
int total_height;
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, effect.color);
switch(effect.alignment)
{
case FC_ALIGN_CENTER:
box.x -= width/2;
break;
case FC_ALIGN_RIGHT:
box.x -= width;
break;
default:
break;
}
FC_DrawColumnFromBuffer(font, dest, box, &total_height, effect.scale, effect.alignment);
return FC_MakeRect(box.x, box.y, width, total_height);
}
static FC_Rect FC_RenderCenter(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* text)
{
FC_Rect result = {x, y, 0, 0};
if(text == NULL || font == NULL)
return result;
char* str = U8_strdup(text);
char* del = str;
char* c;
// Go through str, when you find a \n, replace it with \0 and print it
// then move down, back, and continue.
for(c = str; *c != '\0';)
{
if(*c == '\n')
{
*c = '\0';
result = FC_RectUnion(FC_RenderLeft(font, dest, x - scale.x*FC_GetWidth(font, "%s", str)/2.0f, y, scale, str), result);
*c = '\n';
c++;
str = c;
y += scale.y*font->height;
}
else
c++;
}
result = FC_RectUnion(FC_RenderLeft(font, dest, x - scale.x*FC_GetWidth(font, "%s", str)/2.0f, y, scale, str), result);
free(del);
return result;
}
static FC_Rect FC_RenderRight(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* text)
{
FC_Rect result = {x, y, 0, 0};
if(text == NULL || font == NULL)
return result;
char* str = U8_strdup(text);
char* del = str;
char* c;
for(c = str; *c != '\0';)
{
if(*c == '\n')
{
*c = '\0';
result = FC_RectUnion(FC_RenderLeft(font, dest, x - scale.x*FC_GetWidth(font, "%s", str), y, scale, str), result);
*c = '\n';
c++;
str = c;
y += scale.y*font->height;
}
else
c++;
}
result = FC_RectUnion(FC_RenderLeft(font, dest, x - scale.x*FC_GetWidth(font, "%s", str), y, scale, str), result);
free(del);
return result;
}
FC_Rect FC_DrawScale(FC_Font* font, FC_Target* dest, float x, float y, FC_Scale scale, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, font->default_color);
return FC_RenderLeft(font, dest, x, y, scale, fc_buffer);
}
FC_Rect FC_DrawAlign(FC_Font* font, FC_Target* dest, float x, float y, FC_AlignEnum align, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, font->default_color);
FC_Rect result;
switch(align)
{
case FC_ALIGN_LEFT:
result = FC_RenderLeft(font, dest, x, y, FC_MakeScale(1,1), fc_buffer);
break;
case FC_ALIGN_CENTER:
result = FC_RenderCenter(font, dest, x, y, FC_MakeScale(1,1), fc_buffer);
break;
case FC_ALIGN_RIGHT:
result = FC_RenderRight(font, dest, x, y, FC_MakeScale(1,1), fc_buffer);
break;
default:
result = FC_MakeRect(x, y, 0, 0);
break;
}
return result;
}
FC_Rect FC_DrawColor(FC_Font* font, FC_Target* dest, float x, float y, SDL_Color color, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, color);
return FC_RenderLeft(font, dest, x, y, FC_MakeScale(1,1), fc_buffer);
}
FC_Rect FC_DrawEffect(FC_Font* font, FC_Target* dest, float x, float y, FC_Effect effect, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return FC_MakeRect(x, y, 0, 0);
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
set_color_for_all_caches(font, effect.color);
FC_Rect result;
switch(effect.alignment)
{
case FC_ALIGN_LEFT:
result = FC_RenderLeft(font, dest, x, y, effect.scale, fc_buffer);
break;
case FC_ALIGN_CENTER:
result = FC_RenderCenter(font, dest, x, y, effect.scale, fc_buffer);
break;
case FC_ALIGN_RIGHT:
result = FC_RenderRight(font, dest, x, y, effect.scale, fc_buffer);
break;
default:
result = FC_MakeRect(x, y, 0, 0);
break;
}
return result;
}
// Getters
FC_FilterEnum FC_GetFilterMode(FC_Font* font)
{
if(font == NULL)
return FC_FILTER_NEAREST;
return font->filter;
}
Uint16 FC_GetLineHeight(FC_Font* font)
{
if(font == NULL)
return 0;
return font->height;
}
Uint16 FC_GetHeight(FC_Font* font, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return 0;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
Uint16 numLines = 1;
const char* c;
for (c = fc_buffer; *c != '\0'; c++)
{
if(*c == '\n')
numLines++;
}
// Actual height of letter region + line spacing
return font->height*numLines + font->lineSpacing*(numLines - 1); //height*numLines;
}
Uint16 FC_GetWidth(FC_Font* font, const char* formatted_text, ...)
{
if(formatted_text == NULL || font == NULL)
return 0;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
const char* c;
Uint16 width = 0;
Uint16 bigWidth = 0; // Allows for multi-line strings
for (c = fc_buffer; *c != '\0'; c++)
{
if(*c == '\n')
{
bigWidth = bigWidth >= width? bigWidth : width;
width = 0;
continue;
}
FC_GlyphData glyph;
Uint32 codepoint = FC_GetCodepointFromUTF8(&c, 1);
if(FC_GetGlyphData(font, &glyph, codepoint) || FC_GetGlyphData(font, &glyph, ' '))
width += glyph.rect.w;
}
bigWidth = bigWidth >= width? bigWidth : width;
return bigWidth;
}
// If width == -1, use no width limit
FC_Rect FC_GetCharacterOffset(FC_Font* font, Uint16 position_index, int column_width, const char* formatted_text, ...)
{
FC_Rect result = {0, 0, 1, FC_GetLineHeight(font)};
FC_StringList *ls, *iter;
int num_lines = 0;
Uint8 done = 0;
if(formatted_text == NULL || column_width == 0 || position_index == 0 || font == NULL)
return result;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
ls = FC_GetBufferFitToColumn(font, column_width, FC_MakeScale(1,1), 1);
for(iter = ls; iter != NULL;)
{
char* line;
int i = 0;
FC_StringList* next_iter = iter->next;
++num_lines;
for(line = iter->value; line != NULL && *line != '\0'; line = (char*)U8_next(line))
{
++i;
--position_index;
if(position_index == 0)
{
// FIXME: Doesn't handle box-wrapped newlines correctly
line = (char*)U8_next(line);
line[0] = '\0';
result.x = FC_GetWidth(font, "%s", iter->value);
done = 1;
break;
}
}
if(done)
break;
// Prevent line wrapping if there are no more lines
if(next_iter == NULL && !done)
result.x = FC_GetWidth(font, "%s", iter->value);
iter = next_iter;
}
FC_StringListFree(ls);
if(num_lines > 1)
{
result.y = (num_lines - 1) * FC_GetLineHeight(font);
}
return result;
}
Uint16 FC_GetColumnHeight(FC_Font* font, Uint16 width, const char* formatted_text, ...)
{
int y = 0;
FC_StringList *ls, *iter;
if(font == NULL)
return 0;
if(formatted_text == NULL || width == 0)
return font->height;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
ls = FC_GetBufferFitToColumn(font, width, FC_MakeScale(1,1), 0);
for(iter = ls; iter != NULL; iter = iter->next)
{
y += FC_GetLineHeight(font);
}
FC_StringListFree(ls);
return y;
}
static int FC_GetAscentFromCodepoint(FC_Font* font, Uint32 codepoint)
{
FC_GlyphData glyph;
if(font == NULL)
return 0;
// FIXME: Store ascent so we can return it here
FC_GetGlyphData(font, &glyph, codepoint);
return glyph.rect.h;
}
static int FC_GetDescentFromCodepoint(FC_Font* font, Uint32 codepoint)
{
FC_GlyphData glyph;
if(font == NULL)
return 0;
// FIXME: Store descent so we can return it here
FC_GetGlyphData(font, &glyph, codepoint);
return glyph.rect.h;
}
int FC_GetAscent(FC_Font* font, const char* formatted_text, ...)
{
Uint32 codepoint;
int max, ascent;
const char* c;
if(font == NULL)
return 0;
if(formatted_text == NULL)
return font->ascent;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
max = 0;
c = fc_buffer;
while(*c != '\0')
{
codepoint = FC_GetCodepointFromUTF8(&c, 1);
if(codepoint != 0)
{
ascent = FC_GetAscentFromCodepoint(font, codepoint);
if(ascent > max)
max = ascent;
}
++c;
}
return max;
}
int FC_GetDescent(FC_Font* font, const char* formatted_text, ...)
{
Uint32 codepoint;
int max, descent;
const char* c;
if(font == NULL)
return 0;
if(formatted_text == NULL)
return font->descent;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
max = 0;
c = fc_buffer;
while(*c != '\0')
{
codepoint = FC_GetCodepointFromUTF8(&c, 1);
if(codepoint != 0)
{
descent = FC_GetDescentFromCodepoint(font, codepoint);
if(descent > max)
max = descent;
}
++c;
}
return max;
}
int FC_GetBaseline(FC_Font* font)
{
if(font == NULL)
return 0;
return font->baseline;
}
int FC_GetSpacing(FC_Font* font)
{
if(font == NULL)
return 0;
return font->letterSpacing;
}
int FC_GetLineSpacing(FC_Font* font)
{
if(font == NULL)
return 0;
return font->lineSpacing;
}
Uint16 FC_GetMaxWidth(FC_Font* font)
{
if(font == NULL)
return 0;
return font->maxWidth;
}
SDL_Color FC_GetDefaultColor(FC_Font* font)
{
if(font == NULL)
{
SDL_Color c = {0,0,0,255};
return c;
}
return font->default_color;
}
Uint8 FC_InRect(float x, float y, FC_Rect input_rect)
{
return (input_rect.x <= x && x <= input_rect.x + input_rect.w && input_rect.y <= y && y <= input_rect.y + input_rect.h);
}
// TODO: Make it work with alignment
Uint16 FC_GetPositionFromOffset(FC_Font* font, float x, float y, int column_width, FC_AlignEnum align, const char* formatted_text, ...)
{
FC_StringList *ls, *iter;
Uint8 done = 0;
int height = FC_GetLineHeight(font);
Uint16 position = 0;
int current_x = 0;
int current_y = 0;
FC_GlyphData glyph_data;
if(formatted_text == NULL || column_width == 0 || font == NULL)
return 0;
FC_EXTRACT_VARARGS(fc_buffer, formatted_text);
ls = FC_GetBufferFitToColumn(font, column_width, FC_MakeScale(1,1), 1);
for(iter = ls; iter != NULL; iter = iter->next)
{
char* line;
for(line = iter->value; line != NULL && *line != '\0'; line = (char*)U8_next(line))
{
if(FC_GetGlyphData(font, &glyph_data, FC_GetCodepointFromUTF8((const char**)&line, 0)))
{
if(FC_InRect(x, y, FC_MakeRect(current_x, current_y, glyph_data.rect.w, glyph_data.rect.h)))
{
done = 1;
break;
}
current_x += glyph_data.rect.w;
}
position++;
}
if(done)
break;
current_x = 0;
current_y += height;
if(y < current_y)
break;
}
FC_StringListFree(ls);
return position;
}
// Setters
void FC_SetFilterMode(FC_Font* font, FC_FilterEnum filter)
{
if(font == NULL)
return;
if(font->filter != filter)
{
font->filter = filter;
}
}
void FC_SetSpacing(FC_Font* font, int LetterSpacing)
{
if(font == NULL)
return;
font->letterSpacing = LetterSpacing;
}
void FC_SetLineSpacing(FC_Font* font, int LineSpacing)
{
if(font == NULL)
return;
font->lineSpacing = LineSpacing;
}
void FC_SetDefaultColor(FC_Font* font, SDL_Color color)
{
if(font == NULL)
return;
font->default_color = color;
}
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