[Gfxprim] [repo.or.cz] gfxprim.git branch master updated: ea35af9019e34da61945dd72615c57d3e303a743

21 Jan 2012

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http://repo.or.cz/w/gfxprim.git/commit/ea35af9019e34da61945dd72615c57d3e303a...
commit ea35af9019e34da61945dd72615c57d3e303a743
Author: Cyril Hrubis metan@ucw.cz
Date:   Sat Jan 21 17:42:13 2012 +0100
input: Add rough key even ascii conversion.

diff --git a/libs/input/GP_Event.c b/libs/input/GP_Event.c
index 129f1ee..022e744 100644
--- a/libs/input/GP_Event.c
+++ b/libs/input/GP_Event.c
@@ -263,6 +263,47 @@ void GP_EventPushAbs(uint32_t x, uint32_t y, uint32_t pressure,
    event_put(&cur_state);
 }
+static char keys_to_ascii[] = {
+	   0x00, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6',  '7',  '8',
+	    '9',  '0',  '-',  '=', 0x08, 't',  'q',  'w',  'e',  'r',
+	    't',  'y',  'u',  'i',  'o',  'p',  '(',  ')', 'n', 0x00,
+	    'a',  's',  'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';',
+	   ''',  '`', 0x00, '',  'z',  'x',  'c',  'v',  'b',  'n',
+	    'm',  ',',  '.',  '/', 0x00,  '*', 0x00,  ' ', 0x00, 0x00,
+	   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	   0x00,  '7',  '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1',
+	    '2',  '3',  '0',  '.'
+};
+
+static char keys_to_ascii_s[] = {
+	   0x00, 0x1b,  '!',  '@',  '#',  '$',  '%',  '^',  '&',  '*',
+	    '(',  ')',  '_',  '+', 0x08, 't',  'Q',  'W',  'E',  'R',
+	    'T',  'Y',  'U',  'I',  'O',  'P',  '(',  ')', 'n', 0x00,
+	    'A',  'S',  'D',  'F',  'G',  'H',  'J',  'K',  'L',  ':',
+	    '"',  '~', 0x00,  '|',  'Z',  'X',  'C',  'V',  'B',  'N',
+	    'M',  '<',  '>',  '?', 0x00,  '*', 0x00,  ' ', 0x00, 0x00,
+	   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	   0x00,  '7',  '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1',
+	    '2',  '3',  '0',  '.'
+};
+
+/*
+ * Fills key ascii value accordingly to keys pressed.
+ */
+static void key_to_ascii(GP_Event *ev)
+{
+	ev->val.key.ascii = 0;
+	
+	if (GP_EventGetKey(ev, GP_KEY_LEFT_SHIFT) ||
+	    GP_EventGetKey(ev, GP_KEY_RIGHT_SHIFT)) {
+		if (ev->val.key.key < sizeof(keys_to_ascii_s))
+			ev->val.key.ascii = keys_to_ascii_s[ev->val.key.key];
+	} else {
+		if (ev->val.key.key < sizeof(keys_to_ascii))
+			ev->val.key.ascii = keys_to_ascii[ev->val.key.key];
+	}
+}
+
 void GP_EventPushKey(uint32_t key, uint8_t code, struct timeval *time)
 {
    switch (code) {
@@ -283,7 +324,7 @@ void GP_EventPushKey(uint32_t key, uint8_t code, struct timeval *time)
    cur_state.type  = GP_EV_KEY;
    cur_state.code  = code;
    cur_state.val.key.key = key;
-	//TODO cur_state.val.key.ascii
+	key_to_ascii(&cur_state);
    
    set_time(time);
http://repo.or.cz/w/gfxprim.git/commit/0f58139e80e4a6da1385034144d9f67e146ff...
commit 0f58139e80e4a6da1385034144d9f67e146ff6b8
Author: Cyril Hrubis metan@ucw.cz
Date:   Tue Jan 17 19:40:13 2012 +0100
text: Fix glyph metric computation.
Fix GP_TextWidth() count correctly for
    the first and last letter in the string.
+ Far more fixes and edhancements.
diff --git a/include/text/GP_Font.h b/include/text/GP_Font.h
index 0bce212..3612873 100644
--- a/include/text/GP_Font.h
+++ b/include/text/GP_Font.h
@@ -173,6 +173,21 @@ static inline unsigned int GP_FontMaxWidth(const GP_FontFace *font)
    return font->max_glyph_width;
 }
+static inline unsigned int GP_FontMaxAdvanceX(const GP_FontFace *font)
+{
+	return font->max_glyph_advance;
+}
+
+static inline const char *GP_FontFamily(const GP_FontFace *font)
+{
+	return font->family_name;
+}
+
+static inline const char *GP_FontStyle(const GP_FontFace *font)
+{
+	return font->style_name;
+}
+
 /*
  * Returns glyph count for charset.
  */
diff --git a/libs/text/GP_DefaultFont.c b/libs/text/GP_DefaultFont.c
index d2faa49..52b6608 100644
--- a/libs/text/GP_DefaultFont.c
+++ b/libs/text/GP_DefaultFont.c
@@ -219,8 +219,8 @@ static int8_t default_console_glyphs[] = {
 };
struct GP_FontFace GP_DefaultConsoleFont = {
-	.family_name = "gfxprim",
-	.style_name = "mono",
+	.family_name = "Gfxprim",
+	.style_name = "Mono",
    .charset = GP_CHARSET_7BIT,
    .ascend  = 9,
    .descend = 2,
@@ -425,8 +425,8 @@ static uint8_t default_proportional_glyphs[] = {
 };
struct GP_FontFace GP_DefaultProportionalFont = {
-	.family_name = "gfxprim",
-	.style_name = "proportional",
+	.family_name = "Gfxprim",
+	.style_name = "Proportional",
    .charset = GP_CHARSET_7BIT,
    .ascend  = 9,
    .descend = 2,
diff --git a/libs/text/GP_TextMetric.c b/libs/text/GP_TextMetric.c
index 737d61d..45371fe 100644
--- a/libs/text/GP_TextMetric.c
+++ b/libs/text/GP_TextMetric.c
@@ -38,84 +38,96 @@ static const GP_GlyphBitmap *get_glyph(const GP_TextStyle *style, int c)
    return glyph;
 }
-static unsigned int get_pixel_multiplier(const GP_TextStyle *style)
+static unsigned int multiply_width(const GP_TextStyle *style, unsigned int w)
 {
-	return style->pixel_xmul + style->pixel_xspace;
+	return w * style->pixel_xmul + (w - 1) * style->pixel_xspace;
 }
/*
- * Returns glyph width from the basepoint to the end of the glyph bitmap.
+ * Returns glyph advance.
  */
-static unsigned int glyph_width(const GP_TextStyle *style, int c)
+static unsigned int glyph_advance_x(const GP_TextStyle *style, int ch)
 {
-	unsigned int pixel_multiplier = get_pixel_multiplier(style); 
-	const GP_GlyphBitmap *glyph = get_glyph(style, c);
+	const GP_GlyphBitmap *glyph = get_glyph(style, ch);
-	return (glyph->width + glyph->bearing_x) * pixel_multiplier;
+	return multiply_width(style, glyph->advance_x);
 }
/*
- * Returns size of the glyph but doesn't count bearing.
- *
- * Note that the bearing may be negative (typical case is letter 'j' or most of
- * the italic glyphs). So in order not to draw out of the text bouding box,
- * first glyph ignores bearing_x and draws beginning of the glyph bitmap on the
- * starting basepoint.
- *
+ * Return maximal glyph advance for a character from str.
  */
-static unsigned int first_glyph_width(const GP_TextStyle *style, int c)
+static unsigned int max_glyph_advance_x(const GP_TextStyle *style,
+                                        const char *str)
 {
-	unsigned int pixel_multiplier = get_pixel_multiplier(style);
-	const GP_GlyphBitmap *glyph = get_glyph(style, c);
+	unsigned int max = 0, i;
-	return glyph->width * pixel_multiplier;
+	for (i = 0; str[i] != '0'; i++)
+		max = GP_MAX(max, glyph_advance_x(style, str[i]));
+
+	return max;
 }
/*
- * Returns space that is added after the glyph.
- *
- * Eg. the advance minus glyph width.
- *
- * TODO: kerning
+ * Returns _SINGLE_ glyph size, not including the bearing_x and including space
+ * occupied by the glyph bitmap if the bitmap width overflows glyph advance_x.
  */
-static unsigned int glyph_space(const GP_TextStyle *style, char ch)
+static unsigned int glyph_width(const GP_TextStyle *style, int c)
 {
-	unsigned int pixel_multiplier = get_pixel_multiplier(style);
-	const GP_GlyphBitmap *glyph = get_glyph(style, ch);
+	unsigned int size, advance;
    
-	return (glyph->advance_x - glyph->width - glyph->bearing_x)
-	       * pixel_multiplier + style->char_xspace;
+	const GP_GlyphBitmap *glyph = get_glyph(style, c);
+	
+	advance = multiply_width(style, glyph->advance_x - glyph->bearing_x);
+	size    = multiply_width(style, glyph->width);
+
+	return (size > advance) ? size : advance;
 }
/*
- * Returns maximal character width for a given string.
+ * Returns size occupied by the last glyph. Here we take advance_x into account. 
  */
-static unsigned int max_glyph_width(const GP_TextStyle *style, const char *str)
+static unsigned int last_glyph_width(const GP_TextStyle *style, int c)
 {
-	unsigned int max = 0, i;
-
-	for (i = 0; str[i] != '0'; i++)
-		max = GP_MAX(max, glyph_width(style, str[i]));
+	unsigned int size, advance;
+	
+	const GP_GlyphBitmap *glyph = get_glyph(style, c);
+	
+	advance = multiply_width(style, glyph->advance_x);
+	size    = multiply_width(style, glyph->width + glyph->bearing_x);
-	return max;
+	return (size > advance) ? size : advance;
 }
/*
- * Return maximal character space after an glyph.
+ * Returns first glyph width, that is and advance minus the bearing_x.
  */
-static unsigned int max_glyph_space(const GP_TextStyle *style, const char *str)
+static unsigned int first_glyph_width(const GP_TextStyle *style, int c)
 {
-	unsigned int max = 0, i;
-
-	for (i = 0; str[i] != '0'; i++)
-		max = GP_MAX(max, glyph_space(style, str[i]));
+	const GP_GlyphBitmap *glyph = get_glyph(style, c);
-	return max;
+	return multiply_width(style, glyph->advance_x - glyph->bearing_x);
 }
+/*
+ * Returns text width.
+ *
+ * There are two problems with text width it's start and it's end.
+ *
+ * At the start the first letter may have bearing_x negative, making it
+ * overflow out of the bouding box and even in case it's possitive the returned
+ * size would be slightly bigger. This one is easy to fix.
+ *
+ * The end of the string is problematic too, some of the glyphs may have
+ * advance smaller than sum of the bitmap width and bearing_x that way we would
+ * return slightly less than is the actuall size of the text bouding box. The
+ * other problem is that the advance is usually grater than the glyph space (as
+ * the exact size of the glyph itself without advance before and space after is
+ * not known), so we likely return some more pixels than is needed, but that's
+ * the joy of life.
+ */
 unsigned int GP_TextWidth(const GP_TextStyle *style, const char *str)
 {
-	unsigned int i, len = 0;
+	unsigned int i, len;
if (style == NULL)
    	style = &GP_DefaultStyle;
@@ -123,93 +135,85 @@ unsigned int GP_TextWidth(const GP_TextStyle *style, const char *str)
    if (str == NULL || str[0] == '0')
    	return 0;
-	len += first_glyph_width(style, str[0]);
-	
-	if (str[1] == '0')
-		return len;
-
-	len += glyph_space(style, str[0]);
+	/* special case, one letter */
+	if (str[1] == '0') {
+		return glyph_width(style, str[0]);
+	}
-	for (i = 1; str[i] != '0'; i++) {
-		len += glyph_width(style, str[i]);
+	/* first letter */
+	len = first_glyph_width(style, str[0]) + style->char_xspace;
+	
+	/* middle letters */
+	for (i = 1; str[i+1] != '0'; i++)
+		len += glyph_advance_x(style, str[i]) + style->char_xspace;
-		if (str[i+1] != '0')
-			len += glyph_space(style, str[i]);
-	}
+	/* last letter */
+	len += last_glyph_width(style, str[i]);
return len;
 }
+/*
+ * Return max advance now. We will do something better maybe.
+ */
 GP_Size GP_TextMaxWidth(const GP_TextStyle *style, unsigned int len)
 {
-	unsigned int glyph_width;
-	//TODO: !
-	unsigned int space_width = style->char_xspace;
-
    if (style == NULL)
    	style = &GP_DefaultStyle;
-	glyph_width = style->font->max_glyph_width
-	              * (style->pixel_xmul + style->pixel_xspace);
-
    if (len == 0)
    	return 0;
-	return len * glyph_width + (len - 1) * space_width; 
+	return multiply_width(style, len * style->font->max_glyph_advance) +
+	       (len - 1) * style->char_xspace; 
 }
+/*
+ * Here too.
+ */
 GP_Size GP_TextMaxStrWidth(const GP_TextStyle *style, const char *str,
                            unsigned int len)
 {
-	unsigned int space_width;
-	unsigned int glyph_width;
-	
    if (style == NULL)
    	style = &GP_DefaultStyle;
    
-	space_width = max_glyph_space(style, str);
-	
    if (len == 0 || str == NULL)
    	return 0;
-	glyph_width = max_glyph_width(style, str);
+	return len * max_glyph_advance_x(style, str) +
+	       (len - 1) * style->char_xspace;
+}
+
+/* Ascend, Descend, Height -- far easier */
-	return len * glyph_width + (len - 1) * space_width;
+static unsigned int multiply_height(const GP_TextStyle *style, unsigned int h)
+{
+	return h * style->pixel_ymul + (h - 1) * style->pixel_yspace;
 }
GP_Size GP_TextHeight(const GP_TextStyle *style)
 {
-	unsigned int h;
-	
    if (style == NULL)
    	style = &GP_DefaultStyle;
+	
+	unsigned int height = style->font->ascend + style->font->descend;
-	h = style->font->ascend + style->font->descend;
-
-	return h * style->pixel_ymul +
-	       (h - 1) * style->pixel_yspace;
+	return multiply_height(style, height);
 }
GP_Size GP_TextAscent(const GP_TextStyle *style)
 {
-	unsigned int h;
-
    if (style == NULL)
    	style = &GP_DefaultStyle;
-	h = style->font->ascend;
    
-	return h * style->pixel_ymul + (h - 1) * style->pixel_yspace;
+	return multiply_height(style, style->font->ascend);
 }
GP_Size GP_TextDescent(const GP_TextStyle *style)
 {
-	unsigned int h;
-	
    if (style == NULL)
    	style = &GP_DefaultStyle;
-	h = style->font->descend;
-	
-	return h * style->pixel_ymul + (h - 1) * style->pixel_yspace;
+	return multiply_height(style, style->font->descend);
 }
diff --git a/tests/SDL/fonttest.c b/tests/SDL/fonttest.c
index ec9f93a..2fdf194 100644
--- a/tests/SDL/fonttest.c
+++ b/tests/SDL/fonttest.c
@@ -83,9 +83,12 @@ static void print_character_metadata(const GP_FontFace *font, int c)
static void print_font_properties(const GP_FontFace *font)
 {
-	fprintf(stderr, "Font properties:n");
+	fprintf(stderr, "Font '%s %s' properties:n",
+	                GP_FontFamily(font), GP_FontStyle(font));
    fprintf(stderr, "    Height: ascend: %d, descend: %dn",
    		GP_FontAscend(font), GP_FontDescend(font));
+	fprintf(stderr, "    Max advance_x: %un",
+	                GP_FontMaxAdvanceX(font));
    fprintf(stderr, "    Glyph bitmap format: %sn", 
                    glyph_bitmap_format_name(font->glyph_bitmap_format));
    fprintf(stderr, "    Bounding box width: %d, heigth: %dn",
@@ -155,9 +158,13 @@ void redraw_screen(void)
    	style.pixel_ymul = 2;
    	style.pixel_yspace = 1;
-		GP_Text(&context, &style, 34, SPACING*i + 44, align,
+		GP_Text(&context, &style, 34, SPACING * i + 44, align,
    	        white_pixel, black_pixel, test_string);
+		GP_RectXYWH(&context, 33, SPACING * i + 43,
+		            GP_TextWidth(&style, test_string) + 1,
+			    GP_TextHeight(&style) + 1, dark_gray_pixel);
+
    	style.pixel_xmul = 4;
    	style.pixel_ymul = 2;
    	style.pixel_xspace = 1;
-----------------------------------------------------------------------
Summary of changes:
 include/text/GP_Font.h     |   15 ++++
 libs/input/GP_Event.c      |   43 +++++++++++-
 libs/text/GP_DefaultFont.c |    8 +-
 libs/text/GP_TextMetric.c  |  172 ++++++++++++++++++++++---------------------
 tests/SDL/fonttest.c       |   11 +++-
 5 files changed, 158 insertions(+), 91 deletions(-)
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[Gfxprim] [repo.or.cz] gfxprim.git branch master updated: ea35af9019e34da61945dd72615c57d3e303a743