linux freetype font test stuff
This commit is contained in:
insofaras
parent
35283aa36d
commit
b4c221326d
4
Makefile
4
Makefile
|
|
@ -1,8 +1,8 @@
|
|||
CPP_FILES := $(wildcard *.cpp) $(wildcard **/*.cpp)
|
||||
H_FILES := $(wildcard *.h) $(wildcard **/*.h)
|
||||
WARNINGS := -Wno-write-strings
|
||||
PLAT_LINKS := -L/usr/local/lib -lX11 -lpthread -lm -lrt -lGL -ldl -lXfixes
|
||||
FLAGS := -fPIC -fno-threadsafe-statics -pthread -I../foreign
|
||||
PLAT_LINKS := -L/usr/local/lib -lX11 -lpthread -lm -lrt -lGL -ldl -lXfixes -lfreetype -lfontconfig
|
||||
FLAGS := -fPIC -fno-threadsafe-statics -pthread -I../foreign $(shell pkg-config --cflags freetype2)
|
||||
|
||||
debug: FLAGS += -DFRED_INTERNAL=1 -DFRED_SUPER=1 -g -O0
|
||||
debug: ../4ed_app.so ../4ed
|
||||
|
|
|
|||
|
|
@ -101,6 +101,7 @@
|
|||
#endif
|
||||
|
||||
#define SUPPORT_DPI 1
|
||||
#define LINUX_FONTS 1
|
||||
|
||||
//
|
||||
// Linux structs / enums
|
||||
|
|
@ -1129,6 +1130,7 @@ INTERNAL_Sys_Debug_Message_Sig(internal_debug_message){
|
|||
|
||||
#include "system_shared.cpp"
|
||||
#include "4ed_rendering.cpp"
|
||||
#include "linux_font.cpp"
|
||||
|
||||
internal f32
|
||||
size_change(i32 dpi_x, i32 dpi_y){
|
||||
|
|
@ -1157,6 +1159,9 @@ Font_Load_Sig(system_draw_font_load){
|
|||
#endif
|
||||
|
||||
for(; attempts < 3; ++attempts){
|
||||
#if LINUX_FONTS
|
||||
success = linux_font_load(font_out, filename, pt_size, tab_width);
|
||||
#else
|
||||
success = draw_font_load(
|
||||
&linuxvars.font_part,
|
||||
font_out,
|
||||
|
|
@ -1166,6 +1171,7 @@ Font_Load_Sig(system_draw_font_load){
|
|||
oversample,
|
||||
store_texture
|
||||
);
|
||||
#endif
|
||||
|
||||
if(success){
|
||||
break;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,234 @@
|
|||
#undef internal
|
||||
#include <fontconfig/fontconfig.h>
|
||||
#include <ft2build.h>
|
||||
#include FT_FREETYPE_H
|
||||
#include FT_LCD_FILTER_H
|
||||
#define internal static
|
||||
|
||||
//TODO(inso): put in linuxvars
|
||||
static FcConfig* fc;
|
||||
|
||||
internal char*
|
||||
linux_get_sys_font(char* name, i32 pt_size){
|
||||
char* result = 0;
|
||||
|
||||
if(!fc){
|
||||
fc = FcInitLoadConfigAndFonts();
|
||||
}
|
||||
|
||||
FcPattern* pat = FcPatternBuild(
|
||||
NULL,
|
||||
FC_POSTSCRIPT_NAME, FcTypeString, name,
|
||||
FC_SIZE, FcTypeDouble, (double)pt_size,
|
||||
FC_FONTFORMAT, FcTypeString, "TrueType",
|
||||
NULL
|
||||
);
|
||||
|
||||
FcConfigSubstitute(fc, pat, FcMatchPattern);
|
||||
FcDefaultSubstitute(pat);
|
||||
|
||||
FcResult res;
|
||||
FcPattern* font = FcFontMatch(fc, pat, &res);
|
||||
FcChar8* fname = 0;
|
||||
|
||||
if(font){
|
||||
FcPatternGetString(font, FC_FILE, 0, &fname);
|
||||
if(fname){
|
||||
result = strdup((char*)fname);
|
||||
fprintf(stderr, "Got system font from FontConfig: %s\n", result);
|
||||
}
|
||||
FcPatternDestroy(font);
|
||||
}
|
||||
|
||||
FcPatternDestroy(pat);
|
||||
|
||||
if(!result){
|
||||
char space[1024];
|
||||
String str = make_fixed_width_string(space);
|
||||
if(sysshared_to_binary_path(&str, name)){
|
||||
result = strdup(space);
|
||||
} else {
|
||||
result = strdup(name);
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
internal u32
|
||||
next_pow_of_2(u32 v){
|
||||
--v;
|
||||
v |= v >> 1;
|
||||
v |= v >> 2;
|
||||
v |= v >> 4;
|
||||
v |= v >> 8;
|
||||
v |= v >> 16;
|
||||
return ++v;
|
||||
}
|
||||
|
||||
#define NUM_GLYPHS 128
|
||||
#define ENABLE_LCD_FILTER 0
|
||||
|
||||
internal b32
|
||||
linux_font_load(Render_Font *rf, char *name, i32 pt_size, i32 tab_width){
|
||||
|
||||
#if 0
|
||||
char* filename = linux_get_sys_font(name, pt_size);
|
||||
#else
|
||||
char* filename = (char*)malloc(256);
|
||||
String str = make_string(filename, 0, 256);
|
||||
sysshared_to_binary_path(&str, name);
|
||||
#endif
|
||||
|
||||
memset(rf, 0, sizeof(*rf));
|
||||
|
||||
//TODO(inso): put stuff in linuxvars / init in main
|
||||
FT_Library ft;
|
||||
FT_Face face;
|
||||
b32 use_lcd_filter = 0;
|
||||
|
||||
FT_Init_FreeType(&ft);
|
||||
|
||||
//NOTE(inso): i'm not sure the LCD filter looks better, and it doesn't work perfectly with the coloring stuff
|
||||
#if ENABLE_LCD_FILTER
|
||||
if(FT_Library_SetLcdFilter(ft, FT_LCD_FILTER_DEFAULT) == 0){
|
||||
puts("LCD Filter on");
|
||||
use_lcd_filter = 1;
|
||||
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
|
||||
}
|
||||
#endif
|
||||
|
||||
FT_New_Face(ft, filename, 0, &face);
|
||||
|
||||
// set size & metrics
|
||||
FT_Size_RequestRec_ size = {};
|
||||
size.type = FT_SIZE_REQUEST_TYPE_REAL_DIM;
|
||||
size.height = pt_size << 6;
|
||||
FT_Request_Size(face, &size);
|
||||
|
||||
rf->loaded = 1;
|
||||
rf->ascent = face->size->metrics.ascender / 64.0f;
|
||||
rf->descent = face->size->metrics.descender / 64.0f;
|
||||
rf->advance = face->size->metrics.max_advance / 64.0f;
|
||||
rf->height = face->size->metrics.height / 64.0f;
|
||||
rf->line_skip = rf->height - (rf->ascent - rf->descent);
|
||||
|
||||
int max_glyph_w = face->size->metrics.x_ppem;
|
||||
int max_glyph_h = rf->height;
|
||||
int tex_width = 64;
|
||||
int tex_height = 0;
|
||||
|
||||
// estimate upper bound on texture width
|
||||
do {
|
||||
tex_width *= 2;
|
||||
float glyphs_per_row = ceilf(tex_width / (float) max_glyph_w);
|
||||
float rows = ceilf(NUM_GLYPHS / glyphs_per_row);
|
||||
tex_height = rows * (max_glyph_h + 2);
|
||||
} while(tex_height > tex_width);
|
||||
|
||||
tex_height = next_pow_of_2(tex_height);
|
||||
|
||||
int pen_x = 0;
|
||||
int pen_y = 0;
|
||||
|
||||
u32* pixels = (u32*) calloc(tex_width * tex_height, sizeof(u32));
|
||||
|
||||
// XXX: test if AUTOHINT looks better or not
|
||||
const u32 ft_extra_flags = use_lcd_filter ? FT_LOAD_TARGET_LCD : FT_LOAD_FORCE_AUTOHINT;
|
||||
|
||||
for(int i = 0; i < NUM_GLYPHS; ++i){
|
||||
if(FT_Load_Char(face, i, FT_LOAD_RENDER | ft_extra_flags) != 0) continue;
|
||||
|
||||
int w = face->glyph->bitmap.width;
|
||||
int h = face->glyph->bitmap.rows;
|
||||
|
||||
// lcd filter produces RGB bitmaps, need to account for the extra components
|
||||
if(use_lcd_filter){
|
||||
w /= 3;
|
||||
}
|
||||
|
||||
// move to next line if necessary
|
||||
if(pen_x + w >= tex_width){
|
||||
pen_x = 0;
|
||||
pen_y += (max_glyph_h + 2);
|
||||
}
|
||||
|
||||
// set all this stuff the renderer needs
|
||||
stbtt_packedchar* c = rf->chardata + i;
|
||||
|
||||
c->x0 = pen_x;
|
||||
c->y0 = pen_y;
|
||||
c->x1 = pen_x + w;
|
||||
c->y1 = pen_y + h + 1;
|
||||
|
||||
c->xoff = face->glyph->bitmap_left;
|
||||
c->yoff = -face->glyph->bitmap_top;
|
||||
|
||||
c->xoff2 = w + c->xoff;
|
||||
c->yoff2 = h + c->yoff + 1;
|
||||
|
||||
c->xadvance = face->glyph->advance.x >> 6;
|
||||
|
||||
rf->advance_data[i] = c->xadvance;
|
||||
rf->glyphs[i].exists = 1;
|
||||
|
||||
|
||||
int pitch = face->glyph->bitmap.pitch;
|
||||
|
||||
// write to texture atlas
|
||||
for(int j = 0; j < h; ++j){
|
||||
for(int i = 0; i < w; ++i){
|
||||
int x = pen_x + i;
|
||||
int y = pen_y + j;
|
||||
|
||||
if(use_lcd_filter){
|
||||
u8 r = face->glyph->bitmap.buffer[j * pitch + i * 3];
|
||||
u8 g = face->glyph->bitmap.buffer[j * pitch + i * 3 + 1];
|
||||
u8 b = face->glyph->bitmap.buffer[j * pitch + i * 3 + 2];
|
||||
u8 a = (r + g + b) / 3.0f;
|
||||
|
||||
pixels[y * tex_width + x] = (a << 24) | (r << 16) | (g << 8) | b;
|
||||
} else {
|
||||
pixels[y * tex_width + x] = face->glyph->bitmap.buffer[j * pitch + i] * 0x1010101;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pen_x = c->x1 + 1;
|
||||
}
|
||||
|
||||
rf->chardata['\r'] = rf->chardata[' '];
|
||||
rf->chardata['\n'] = rf->chardata[' '];
|
||||
rf->chardata['\t'] = rf->chardata[' '];
|
||||
rf->chardata['\t'].xadvance *= tab_width;
|
||||
|
||||
FT_Done_FreeType(ft);
|
||||
|
||||
tex_height = next_pow_of_2(pen_y + max_glyph_h + 2);
|
||||
|
||||
rf->tex_width = tex_width;
|
||||
rf->tex_height = tex_height;
|
||||
|
||||
// upload texture
|
||||
glGenTextures(1, &rf->tex);
|
||||
glBindTexture(GL_TEXTURE_2D, rf->tex);
|
||||
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
|
||||
|
||||
if(use_lcd_filter){
|
||||
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_width, tex_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
|
||||
} else {
|
||||
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, tex_width, tex_height, 0, GL_ALPHA, GL_UNSIGNED_INT, pixels);
|
||||
}
|
||||
|
||||
glBindTexture(GL_TEXTURE_2D, 0);
|
||||
|
||||
free(pixels);
|
||||
free(filename);
|
||||
|
||||
return 1;
|
||||
}
|
||||
Loading…
Reference in New Issue