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xform_from_rect

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jacob 2025-05-27 02:10:18 -05:00
parent 91f89ac65b
commit 1072f3225c
2 changed files with 11 additions and 2 deletions
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3
src/draw.c
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@ -437,8 +437,7 @@ struct rect draw_text(struct gpu_cmd_store store, struct draw_text_params params
struct drawable_glyph *tg = &line->glyphs[i]; struct drawable_glyph *tg = &line->glyphs[i];
struct v2 pos = V2(draw_pos.x + tg->off_x, draw_pos.y + tg->off_y); struct v2 pos = V2(draw_pos.x + tg->off_x, draw_pos.y + tg->off_y);
struct v2 size = V2(tg->width, tg->height); struct v2 size = V2(tg->width, tg->height);
struct v2 pos_center = v2_add(pos, v2_mul(size, 0.5)); struct xform xf = xform_from_rect(RECT_FROM_V2(pos, size));
struct xform xf = XFORM_TRS(.t = pos_center, size);
draw_texture(store, DRAW_TEXTURE_PARAMS(.xf = xf, .texture = params.font->texture, .tint = params.color, .clip = tg->clip)); draw_texture(store, DRAW_TEXTURE_PARAMS(.xf = xf, .texture = params.font->texture, .tint = params.color, .clip = tg->clip));
draw_pos.x += tg->advance; draw_pos.x += tg->advance;

10
src/math.h
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@ -986,6 +986,16 @@ INLINE struct xform xform_from_trs(struct trs trs)
return xf; return xf;
} }
INLINE struct xform xform_from_rect(struct rect rect)
{
struct v2 half_size = v2_mul(rect.size, 0.5);
struct xform xf = ZI;
xf.bx = V2(rect.size.x, 0);
xf.by = V2(0, rect.size.y);
xf.og = v2_add(rect.pos, half_size);
return xf;
}
INLINE struct xform xform_translated(struct xform xf, struct v2 v) INLINE struct xform xform_translated(struct xform xf, struct v2 v)
{ {
xf.og = V2(xf.bx.x * v.x + xf.by.x * v.y + xf.og.x, xf.bx.y * v.x + xf.by.y * v.y + xf.og.y); xf.og = V2(xf.bx.x * v.x + xf.by.x * v.y + xf.og.x, xf.bx.y * v.x + xf.by.y * v.y + xf.og.y);