fix canvas_get_vgcanvas, init text_baseline/text_align

demos/demo_vg_app.c

@@ -283,6 +283,31 @@ static ret_t on_paint_center(void* ctx, event_t* e) {
 
 #include "vg_common.inc"
 
+static ret_t on_paint_text(void* ctx, event_t* e) {
+  int32_t x = 0;
+  int32_t y = 0;
+  paint_event_t* evt = (paint_event_t*)e;
+  canvas_t* c = evt->c;
+  color_t color = color_init(0xff, 0, 0, 0xff);
+  vgcanvas_t* vg = canvas_get_vgcanvas(c);
+
+  color = color_init(0xff, 0, 0, 0xff);
+  canvas_set_stroke_color(c, color);
+  canvas_stroke_rect(c, x, y, 100, 30);
+
+  color = color_init(0xff, 0, 0, 0xff);
+  canvas_set_text_color(c, color);
+  canvas_set_font(c, NULL, 30);
+
+  vgcanvas_set_fill_color(vg, color);
+  vgcanvas_fill_text(vg, "ABC", 0, 0, 100);
+  /*
+    vgcanvas_translate(vg, x, y);
+    canvas_draw_text(c, L"abc", 3, 0, 0);
+  */
+  return RET_OK;
+}
+
 static ret_t on_paint_vg(void* ctx, event_t* e) {
   paint_event_t* evt = (paint_event_t*)e;
   canvas_t* c = evt->c;

docs/changes.md

@@ -2,6 +2,7 @@
 * 2019/03/05
   * 更新文档。
   * slide view支持循环切换。
+  * 修改canvas\_draw\_text和vgcanvas\_fill\_text坐标不一致的问题。
 
 * 2019/03/04
   * 完善progressbar/slider的显示函数。

src/base/canvas.c

@@ -1349,6 +1349,8 @@ vgcanvas_t* canvas_get_vgcanvas(canvas_t* c) {
     canvas_get_clip_rect(c, &r);
     vgcanvas_clip_rect(vg, r.x, r.y, r.w, r.h);
     vgcanvas_begin_path(vg);
+    vgcanvas_set_text_align(vg, "left");
+    vgcanvas_set_text_baseline(vg, "top");
   }
 
   return vg;