Changeset 8dbd13d in mainline

Timestamp:

2021-05-10T18:36:49Z (4 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

da15002

Parents:

ae634f4

Message:

Display status line for each demo screen

Clipping helps to prevent accidentally drawing over the status line.

File:

• uspace/app/gfxdemo/gfxdemo.c (modified) (11 diffs)

uspace/app/gfxdemo/gfxdemo.c

@@ -69 +69 @@
 
 static bool quit = false;
+static gfx_typeface_t *tface;
+static gfx_font_t *font;
+static gfx_coord_t vpad;
 
 /** Clear screen.
@@ -107 +110 @@
 }
 
-/** Run rectangle demo on a graphic context.
+/** Initialize demo font.
  *
  * @param gc Graphic context
  * @param w Width
  * @param h Height
+ * @return EOK on success or an error code
+ */
+static errno_t demo_font_init(gfx_context_t *gc, gfx_coord_t w, gfx_coord_t h)
+{
+        gfx_font_info_t *finfo;
+        errno_t rc;
+
+        if (quit)
+                return EOK;
+
+        /* XXX Crude way of detecting text mode */
+        if (w < 256) {
+                /* Create dummy font for text mode */
+                rc = gfx_typeface_create(gc, &tface);
+                if (rc != EOK) {
+                        printf("Error creating typeface\n");
+                        goto error;
+                }
+
+                rc = gfx_font_create_textmode(tface, &font);
+                if (rc != EOK) {
+                        printf("Error creating font\n");
+                        goto error;
+                }
+
+                vpad = 0;
+        } else {
+                /* Load font */
+                rc = gfx_typeface_open(gc, "/data/font/helena.tpf", &tface);
+                if (rc != EOK) {
+                        printf("Error opening typeface\n");
+                        goto error;
+                }
+
+                finfo = gfx_typeface_first_font(tface);
+                if (finfo == NULL) {
+                        printf("Typeface contains no font.\n");
+                        rc = ENOENT;
+                        goto error;
+                }
+
+                rc = gfx_font_open(finfo, &font);
+                if (rc != EOK) {
+                        printf("Error opening font.\n");
+                        goto error;
+                }
+
+                vpad = 5;
+        }
+
+        return EOK;
+error:
+        if (tface != NULL)
+                gfx_typeface_destroy(tface);
+        return rc;
+}
+
+/** Finalize demo font. */
+static void demo_font_fini(void)
+{
+        if (font == NULL)
+                return;
+
+        gfx_font_close(font);
+        font = NULL;
+
+        gfx_typeface_destroy(tface);
+        tface = NULL;
+}
+
+/** Start a new demo screen.
+ *
+ * Clear the screen, display a status line and set up clipping.
+ *
+ * @param gc Graphic context
+ * @param w Width
+ * @param h Height
+ * @param text Demo screen description
+ * @return EOK on success or an error code
+ */
+static errno_t demo_begin(gfx_context_t *gc, gfx_coord_t w, gfx_coord_t h,
+    const char *text)
+{
+        gfx_text_fmt_t fmt;
+        gfx_font_metrics_t metrics;
+        gfx_coord2_t pos;
+        gfx_color_t *color;
+        gfx_rect_t rect;
+        gfx_coord_t height;
+        errno_t rc;
+
+        rc = gfx_set_clip_rect(gc, NULL);
+        if (rc != EOK)
+                return rc;
+
+        rc = clear_scr(gc, w, h);
+        if (rc != EOK)
+                return rc;
+
+        if (font != NULL) {
+                rc = gfx_color_new_rgb_i16(0xffff, 0xffff, 0xffff, &color);
+                if (rc != EOK)
+                        goto error;
+
+                gfx_text_fmt_init(&fmt);
+                fmt.color = color;
+                fmt.halign = gfx_halign_center;
+                fmt.valign = gfx_valign_bottom;
+
+                pos.x = w / 2;
+                pos.y = h - 1;
+                rc = gfx_puttext(font, &pos, &fmt, text);
+                if (rc != EOK) {
+                        printf("Error rendering text.\n");
+                        gfx_color_delete(color);
+                        goto error;
+                }
+
+                gfx_color_delete(color);
+
+                gfx_font_get_metrics(font, &metrics);
+                height = metrics.ascent + metrics.descent + 1;
+        } else {
+                height = 0;
+        }
+
+        rect.p0.x = 0;
+        rect.p0.y = 0;
+        rect.p1.x = w;
+        rect.p1.y = h - height - vpad;
+        rc = gfx_set_clip_rect(gc, &rect);
+        if (rc != EOK)
+                return rc;
+
+        return EOK;
+error:
+        return rc;
+}
+
+/** Run rectangle demo on a graphic context.
+ *
+ * @param gc Graphic context
+ * @param w Width
+ * @param h Height
  */
 static errno_t demo_rects(gfx_context_t *gc, gfx_coord_t w, gfx_coord_t h)
@@ -123 +270 @@
                 return EOK;
 
-        rc = clear_scr(gc, w, h);
+        rc = demo_begin(gc, w, h, "Rectangle rendering");
         if (rc != EOK)
                 return rc;
@@ -282 +429 @@
                 return EOK;
 
-        rc = clear_scr(gc, w, h);
+        rc = demo_begin(gc, w, h, "Bitmap rendering without offset");
         if (rc != EOK)
                 return rc;
@@ -345 +492 @@
                 return EOK;
 
-        rc = clear_scr(gc, w, h);
+        rc = demo_begin(gc, w, h, "Bitmap rendering with offset");
         if (rc != EOK)
                 return rc;
@@ -404 +551 @@
                 return EOK;
 
-        rc = clear_scr(gc, w, h);
+        rc = demo_begin(gc, w, h, "Bitmap rendering with color key");
         if (rc != EOK)
                 return rc;
@@ -505 +652 @@
         }
 
-        rc = clear_scr(gc, w, h);
+        rc = demo_begin(gc, w, h, "Text rendering");
         if (rc != EOK)
                 goto error;
@@ -542 +689 @@
 
         rect.p0.x = w / 20;
-        rect.p0.y = 2 * h / 15;
+        rect.p0.y = 1 * h / 15;
         rect.p1.x = w - w / 20;
-        rect.p1.y = 5 * h / 15;
+        rect.p1.y = 4 * h / 15;
 
         rc = gfx_fill_rect(gc, &rect);
@@ -640 +787 @@
 
                 pos.x = w / 20;
-                pos.y = (7 + i) * h / 15;
+                pos.y = (6 + i) * h / 15;
                 rc = gfx_puttext(font, &pos, &fmt, "The quick brown fox jumps over the lazy dog.");
                 if (rc != EOK)
@@ -684 +831 @@
                 return EOK;
 
-        rc = clear_scr(gc, w, h);
+        rc = demo_begin(gc, w, h, "Clipping demonstration");
         if (rc != EOK)
                 return rc;
@@ -777 +924 @@
         errno_t rc;
 
+        (void) demo_font_init(gc, w, h);
+
         while (!quit) {
                 rc = demo_rects(gc, w, h);
                 if (rc != EOK)
-                        return rc;
+                        goto error;
 
                 rc = demo_bitmap(gc, w, h);
                 if (rc != EOK)
-                        return rc;
+                        goto error;
 
                 rc = demo_bitmap2(gc, w, h);
                 if (rc != EOK)
-                        return rc;
+                        goto error;
 
                 rc = demo_bitmap_kc(gc, w, h);
                 if (rc != EOK)
-                        return rc;
+                        goto error;
 
                 rc = demo_text(gc, w, h);
                 if (rc != EOK)
-                        return rc;
+                        goto error;
 
                 rc = demo_clip(gc, w, h);
                 if (rc != EOK)
-                        return rc;
-        }
-
-        return EOK;
+                        goto error;
+        }
+
+        demo_font_fini();
+        return EOK;
+error:
+        demo_font_fini();
+        return rc;
 }