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text positioning

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This commit is contained in:
John Alanbrook 2023-05-30 20:41:02 +00:00
parent 5f3bbbc582
commit ba7fd6560e
5 changed files with 54 additions and 32 deletions
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8
source/engine/ffi.c
View file

@ -236,7 +236,7 @@ JSValue duk_gui_text(JSContext *js, JSValueConst this, int argc, JSValueConst *a
HMM_Vec2 pos = js2hmmv2(argv[1]);
float size = js2number(argv[2]);
renderText(s, pos, size, color_white, 500, -1);
renderText(s, pos, size, color_white, 500, -1, 1.0);
JS_FreeCString(js, s);
return JS_NULL;
}
@ -248,7 +248,7 @@ JSValue duk_ui_text(JSContext *js, JSValueConst this, int argc, JSValueConst *ar
float size = js2number(argv[2]);
struct rgba c = js2color(argv[3]);
int wrap = js2int(argv[4]);
JSValue ret = JS_NewInt64(js, renderText(s, pos, size, c, wrap, -1));
JSValue ret = JS_NewInt64(js, renderText(s, pos, size, c, wrap, -1, 1.0));
JS_FreeCString(js, s);
return ret;
}
@ -261,7 +261,7 @@ JSValue duk_cursor_text(JSContext *js, JSValueConst this, int argc, JSValueConst
struct rgba c = js2color(argv[3]);
int wrap = js2int(argv[5]);
int cursor = js2int(argv[4]);
renderText(s, pos, size, c, wrap, cursor);
renderText(s, pos, size, c, wrap, cursor, 1.0);
JS_FreeCString(js, s);
return JS_NULL;
}
@ -1040,7 +1040,7 @@ JSValue duk_cmd(JSContext *js, JSValueConst this, int argc, JSValueConst *argv)
case 118:
str = JS_ToCString(js,argv[1]);
return bb2js(text_bb(str, js2number(argv[2]), js2number(argv[3])));
return bb2js(text_bb(str, js2number(argv[2]), js2number(argv[3]), 1.0));
break;
}

44
source/engine/font.c
View file

@ -189,6 +189,10 @@ struct sFont *MakeFont(const char *fontfile, int height) {
YughError("Failed to make font %s", fontfile);
}
stbtt_GetFontVMetrics(&fontinfo, &newfont->ascent, &newfont->descent, &newfont->linegap);
float emscale = stbtt_ScaleForMappingEmToPixels(&fontinfo, 16);
newfont->linegap = (newfont->ascent - newfont->descent)* 2 * emscale;
newfont->texID = sg_make_image(&(sg_image_desc){
.type = SG_IMAGETYPE_2D,
.width = packsize,
@ -213,8 +217,12 @@ struct sFont *MakeFont(const char *fontfile, int height) {
r.t0 = (glyph.y0) / (float)packsize;
r.t1 = (glyph.y1) / (float)packsize;
newfont->Characters[c].Advance = glyph.xadvance;
newfont->Characters[c].Size[0] = glyph.x1 - glyph.x0;
stbtt_GetCodepointHMetrics(&fontinfo, c, &newfont->Characters[c].Advance, &newfont->Characters[c].leftbearing);
newfont->Characters[c].Advance *= emscale;
newfont->Characters[c].leftbearing *= emscale;
// newfont->Characters[c].Advance = glyph.xadvance; /* x distance from this char to the next */
newfont->Characters[c].Size[0] = glyph.x1 - glyph.x0;
newfont->Characters[c].Size[1] = glyph.y1 - glyph.y0;
newfont->Characters[c].Bearing[0] = glyph.xoff;
newfont->Characters[c].Bearing[1] = glyph.yoff2;
@ -256,16 +264,14 @@ void text_flush() {
static int drawcaret = 0;
void sdrawCharacter(struct Character c, HMM_Vec2 cursor, float scale, struct rgba color) {
HMM_Vec2 offset = {0.0};
struct text_vert vert;
float lsize = 1.0 / 1024.0;
float oline = 1.0;
vert.pos.x = cursor.X - (c.Bearing[0] + offset.X) * scale - oline;
vert.pos.y = cursor.Y - (c.Bearing[1] + offset.Y) * scale - oline;
vert.pos.x = cursor.X + c.Bearing[0] * scale + oline;
vert.pos.y = cursor.Y - c.Bearing[1] * scale - oline;
vert.wh.x = c.Size[0] * scale + (oline*2);
vert.wh.y = c.Size[1] * scale + (oline*2);
vert.uv.u = (c.rect.s0 - oline*lsize)*USHRT_MAX;
@ -307,7 +313,7 @@ void text_settype(struct sFont *mfont) {
font = mfont;
}
struct boundingbox text_bb(const char *text, float scale, float lw)
struct boundingbox text_bb(const char *text, float scale, float lw, float tracking)
{
HMM_Vec2 cursor = {0,0};
unsigned char *c = text;
@ -315,10 +321,10 @@ struct boundingbox text_bb(const char *text, float scale, float lw)
while (*c != '\0') {
if (isblank(*c)) {
cursor.X += font->Characters[*c].Advance * scale;
cursor.X += font->Characters[*c].Advance * tracking * scale;
c++;
} else if (isspace(*c)) {
cursor.Y -= scale * font->height;
cursor.Y -= scale * font->linegap;
cursor.X = 0;
c++;
} else {
@ -326,29 +332,29 @@ struct boundingbox text_bb(const char *text, float scale, float lw)
int wordwidth = 0;
while (!isspace(*c) && *c != '\0') {
wordwidth += font->Characters[*c].Advance * scale;
wordwidth += font->Characters[*c].Advance * tracking * scale;
c++;
}
if (lw > 0 && (cursor.X + wordwidth) >= lw) {
cursor.X = 0;
cursor.Y -= scale * font->height;
cursor.Y -= scale * font->linegap;
}
while (wordstart < c) {
cursor.X += font->Characters[*wordstart].Advance * scale;
cursor.X += font->Characters[*wordstart].Advance * tracking * scale;
wordstart++;
}
}
}
float height = cursor.Y + (font->height*scale);
float height = cursor.Y + (font->linegap*scale);
float width = lw > 0 ? lw : cursor.X;
return cwh2bb((HMM_Vec2){0,0}, (HMM_Vec2){width,height});
}
int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret) {
int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret, float tracking) {
int len = strlen(text);
drawcaret = caret;
@ -362,11 +368,11 @@ int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, f
while (*line != '\0') {
if (isblank(*line)) {
sdrawCharacter(font->Characters[*line], cursor, scale, usecolor);
cursor.X += font->Characters[*line].Advance * scale;
cursor.X += font->Characters[*line].Advance * tracking * scale;
line++;
} else if (isspace(*line)) {
sdrawCharacter(font->Characters[*line], cursor, scale, usecolor);
cursor.Y -= scale * font->height;
cursor.Y -= scale * font->linegap;
cursor.X = pos.X;
line++;
} else {
@ -374,18 +380,18 @@ int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, f
int wordWidth = 0;
while (!isspace(*line) && *line != '\0') {
wordWidth += font->Characters[*line].Advance * scale;
wordWidth += font->Characters[*line].Advance * tracking * scale;
line++;
}
if (lw > 0 && (cursor.X + wordWidth - pos.X) >= lw) {
cursor.X = pos.X;
cursor.Y -= scale * font->height;
cursor.Y -= scale * font->linegap;
}
while (wordstart < line) {
sdrawCharacter(font->Characters[*wordstart], cursor, scale, usecolor);
cursor.X += font->Characters[*wordstart].Advance * scale;
cursor.X += font->Characters[*wordstart].Advance * tracking * scale;
wordstart++;
}
}

12
source/engine/font.h
View file

@ -13,13 +13,17 @@ struct window;
struct Character {
float Size[2]; // Size of glyph
float Bearing[2]; // Offset from baseline to left/top of glyph
unsigned int Advance; // Horizontal offset to advance to next glyph
int Advance; // Horizontal offset to advance to next glyph
int leftbearing;
struct glrect rect;
};
struct sFont {
uint32_t fontTexture;
uint32_t height;
uint32_t height; /* in pixels */
int ascent;
int descent;
int linegap;
struct Character Characters[127];
sg_image texID;
};
@ -28,8 +32,8 @@ void font_init(struct shader *s);
struct sFont *MakeFont(const char *fontfile, int height);
void sdrawCharacter(struct Character c, HMM_Vec2 cursor, float scale, struct rgba color);
void text_settype(struct sFont *font);
struct boundingbox text_bb(const char *text, float scale, float lw);
int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret);
struct boundingbox text_bb(const char *text, float scale, float lw, float tracking);
int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret, float tracking);
// void text_frame();
void text_flush();

20
source/scripts/engine.js
View file

@ -145,15 +145,23 @@ var GUI = {
var h = ui_text(str, pos.sub(opos), size, color, wrap);
return [wrap,h];
return bb;
},
text_cursor(str, pos, size, cursor) {
cursor_text(str,pos,size,[255,255,255],cursor);
},
column(items) {
items.forEach(x => x());
image(path,pos) {
gui_img(path,screen2world(pos));
return cwh2bb([0,0], cmd(64,path));
},
column(items,pos) {
items.forEach(function(item) {
let bb = item(pos);
pos.y += bb.b;
});
},
};
@ -405,8 +413,8 @@ var Input = {
setnuke() { cmd(78); },
};
function screen2world(screenpos) { return editor.camera.view2world(screenpos); }
function world2screen(worldpos) { return editor.camera.world2view(worldpos); }
function screen2world(screenpos) { return Yugine.camera.view2world(screenpos); }
function world2screen(worldpos) { return Yugine.camera.world2view(worldpos); }
var physics = {
set gravity(x) { cmd(8, x); },
@ -1793,6 +1801,8 @@ var camera2d = gameobject.clone("camera2d", {
},
});
Yugine.camera = World.spawn(camera2d);
win_make(Game.title, Game.resolution[0], Game.resolution[1]);
//win_icon("icon.png");

2
source/shaders/crtfrag.glsl
View file

@ -7,6 +7,8 @@ uniform sampler2D diffuse_texture;
void main()
{
frag_color = texture(diffuse_texture, TexCoords);
return;
vec2 screensize = textureSize(diffuse_texture,0);
vec4 color = texture(diffuse_texture, TexCoords);