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authorTao Bao <tbao@google.com>2018-06-13 19:39:44 +0200
committerTao Bao <tbao@google.com>2018-06-13 22:24:58 +0200
commit9f4263346bb93424efab2d69082c78b456f9db58 (patch)
tree74537208f072acf924a9cd81b6550d34ea8281e4 /minui/include
parentMerge "updater: Drop the 'overlap' parameter in LoadSrcTgtVersion3()." (diff)
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Diffstat (limited to 'minui/include')
-rw-r--r--minui/include/minui/minui.h19
1 files changed, 13 insertions, 6 deletions
diff --git a/minui/include/minui/minui.h b/minui/include/minui/minui.h
index e96b7ae08..ef4abe252 100644
--- a/minui/include/minui/minui.h
+++ b/minui/include/minui/minui.h
@@ -48,7 +48,13 @@ enum GRRotation {
ROTATION_LEFT = 3,
};
+// Initializes the graphics backend and loads font file. Returns 0 on success, or -1 on error. Note
+// that the font initialization failure would be non-fatal, as caller may not need to draw any text
+// at all. Caller can check the font initialization result via gr_sys_font() as needed.
int gr_init();
+
+// Frees the allocated resources. The function is idempotent, and safe to be called if gr_init()
+// didn't finish successfully.
void gr_exit();
int gr_fb_width();
@@ -57,7 +63,8 @@ int gr_fb_height();
void gr_flip();
void gr_fb_blank(bool blank);
-void gr_clear(); // clear entire surface to current color
+// Clears entire surface to current color.
+void gr_clear();
void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
void gr_fill(int x1, int y1, int x2, int y2);
@@ -66,16 +73,16 @@ void gr_texticon(int x, int y, GRSurface* icon);
const GRFont* gr_sys_font();
int gr_init_font(const char* name, GRFont** dest);
void gr_text(const GRFont* font, int x, int y, const char* s, bool bold);
-// Return -1 if font is nullptr.
+// Returns -1 if font is nullptr.
int gr_measure(const GRFont* font, const char* s);
-// Return -1 if font is nullptr.
+// Returns -1 if font is nullptr.
int gr_font_size(const GRFont* font, int* x, int* y);
void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy);
-unsigned int gr_get_width(GRSurface* surface);
-unsigned int gr_get_height(GRSurface* surface);
+unsigned int gr_get_width(const GRSurface* surface);
+unsigned int gr_get_height(const GRSurface* surface);
-// Set rotation, flips gr_fb_width/height if 90 degree rotation difference
+// Sets rotation, flips gr_fb_width/height if 90 degree rotation difference
void gr_rotate(GRRotation rotation);
//