MadButterfly: src/shape_stext.c annotate

annotate src/shape_stext.c @ 413:35712e4bad0e

Make shape_stext.c pass test cases. FcFontMatch should be called before calling query font face.

author	Thinker K.F. Li <thinker@branda.to>
date	Sat, 25 Jul 2009 13:36:23 +0800
parents	a456e267279a
children	bbf036c315be

rev	line source
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	1 #include <stdio.h>
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	2 #include <cairo.h>
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	3 #include <cairo-ft.h>
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	4 #include <fontconfig/fontconfig.h>
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	5 #include "mb_shapes.h"
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	6
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	7 #ifndef ASSERT
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	8 #define ASSERT(x)
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	9 #endif
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	10 #define OK 0
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	11 #define ERR -1
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	12
407 92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	13 /*! \page stext Simple Text
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	14 *
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	15 * A sh_stext_t is broken into fragments. Each fragment comprises the text
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	16 * and the styles applied on the fragement. The styles determines font face
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	17 * used to show the text. The fragment of text with styles is called
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	18 * styled block.
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	19 */
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	20
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	21 /*! \defgroup fontconfig_freetype Fontconfig and FreeType Layer.
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	22 *
411 1633551e495d Add doc Thinker K.F. Li <thinker@branda.to> parents: 410 diff changeset	23 * This layer implements a font provider to rest of the system.
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	24 * It bases on fontconfig and FreeType supporting of Cairo.
411 1633551e495d Add doc Thinker K.F. Li <thinker@branda.to> parents: 410 diff changeset	25 * If you want to provide stext with technologies other than fontconfig and
1633551e495d Add doc Thinker K.F. Li <thinker@branda.to> parents: 410 diff changeset	26 * FreeType, just replace this layer with the implmenetation that you want.
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	27 *
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	28 * @{
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	29 */
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	30 /*! \brief Stakeholder of scaled font.
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	31 *
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	32 * It is actually a cairo_scaled_font_t, now. But, it should not be
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	33 * noticed by out-siders. Only \ref fontconfig_freetype
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	34 * should known it.
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	35 */
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	36 typedef struct _mb_scaled_font mb_scaled_font_t;
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	37
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	38 /*! \brief Stakeholder of scaled font.
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	39 *
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	40 * Although, mb_text_extents_t is defined as a cairo_scaled_font_t, but
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	41 * programmers should assume it is opague.
407 92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	42 *
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	43 * An extents is the span of showing a fragement of text on the output device.
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	44 * It includes x and y advance of cursor after showinng the text.
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	45 * The cursor maybe not really existed. But, the advance is computed as
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	46 * the cursor existed. It also includes width and height of the text.
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	47 * The bearing of a styled block is the left-top corner of the bounding box.
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	48 * The bounding box of a styled block is the minimal rectangle, on the
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	49 * output device, that can contain the text. The bearing is related to
92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	50 * the base line for an extents.
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	51 */
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	52 typedef cairo_text_extents_t mb_text_extents_t;
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	53
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	54 #define MBE_GET_X_ADV(ext) ((ext)->x_advance)
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	55 #define MBE_GET_Y_ADV(ext) ((ext)->y_advance)
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	56 #define MBE_GET_X_BEARING(ext) ((ext)->x_bearing)
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	57 #define MBE_GET_Y_BEARING(ext) ((ext)->y_bearing)
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	58 #define MBE_GET_WIDTH(ext) ((ext)->width)
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	59 #define MBE_GET_HEIGHT(ext) ((ext)->height)
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	60 #define MBE_SET_X_ADV(ext, v) do { ((ext)->x_advance) = v; } while(0)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	61 #define MBE_SET_Y_ADV(ext, v) do { ((ext)->y_advance) = v; } while(0)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	62 #define MBE_SET_X_BEARING(ext, v) do { ((ext)->x_bearing) = v; } while(0)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	63 #define MBE_SET_Y_BEARING(ext, v) do { ((ext)->y_bearing) = v; } while(0)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	64 #define MBE_SET_WIDTH(ext, v) do { ((ext)->width) = v; } while(0)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	65 #define MBE_SET_HEIGHT(ext, v) do { ((ext)->height) = v; } while(0)
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	66
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	67 /*! \brief Find out a font pattern.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	68 *
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	69 * This function use fontconfig to decide a font file in pattern. It can
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	70 * replaced by other mechanism if you think it is not what you want.
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	71 *
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	72 * \param slant make font prune if it it non-zero.
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	73 * \param weight make font normal if it is 100.
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	74 */
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	75 static
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	76 FcPattern query_font_pattern(const char family, int slant, int weight) {
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	77 FcPattern ptn, p, *fn_ptn;
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	78 FcValue val;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	79 FcConfig *cfg;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	80 FcBool r;
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	81 FcResult result;
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	82 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	83 FC_SLANT_ROMAN,
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	84 FC_SLANT_ROMAN,
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	85 FC_SLANT_ITALIC,
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	86 FC_SLANT_OBLIQUE};
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	87
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	88 cfg = FcConfigGetCurrent();
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	89 ptn = FcPatternCreate();
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	90 p = FcPatternCreate();
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	91 if(ptn == NULL \|\| p == NULL)
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	92 goto err;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	93
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	94 val.type = FcTypeString;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	95 val.u.s = family;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	96 FcPatternAdd(ptn, "family", val, FcTrue);
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	97
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	98 val.type = FcTypeInteger;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	99 val.u.i = slant_map[slant];
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	100 FcPatternAdd(ptn, "slant", val, FcTrue);
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	101
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	102 val.type = FcTypeInteger;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	103 val.u.i = weight;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	104 FcPatternAdd(ptn, "weight", val, FcTrue);
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	105
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	106 r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	107 if(!r)
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	108 goto err;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	109
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	110 r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	111 if(!r)
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	112 goto err;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	113
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	114 FcDefaultSubstitute(p);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	115
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	116 fn_ptn = FcFontMatch(cfg, p, &result);
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	117
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	118 /* It is supposed to return FcResultMatch. But, it is no, now.
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	119 * I don't know why. Someone should figure out the issue.
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	120 */
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	121 #if 0
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	122 if(result != FcResultMatch) {
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	123 printf("%d %d\n", result, FcResultMatch);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	124 goto err;
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	125 }
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	126 #endif
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	127 if(fn_ptn == NULL)
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	128 goto err;
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	129
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	130 FcPatternDestroy(ptn);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	131 FcPatternDestroy(p);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	132
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	133 return fn_ptn;
394 b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	134
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	135 err:
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	136 if(ptn)
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	137 FcPatternDestroy(ptn);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	138 if(p)
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	139 FcPatternDestroy(p);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	140 return NULL;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	141
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	142 }
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern Thinker K.F. Li <thinker@branda.to> parents: 393 diff changeset	143
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	144 /*! \brief Find out a font face for a pattern specified.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	145 *
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	146 * The pattern, here, is a vector of family, slant, and weight.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	147 * This function base on fontconfig and cairo FreeType font supporting.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	148 * You can replace this function with other font mechanisms.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	149 */
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	150 static
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	151 mb_font_face_t query_font_face(const char family, int slant, int weight) {
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	152 cairo_font_face_t *cface;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	153 FcPattern *ptn;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	154
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	155 ptn = query_font_pattern(family, slant, weight);
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	156 cface = cairo_ft_font_face_create_for_pattern(ptn);
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	157 FcPatternDestroy(ptn);
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	158
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	159 return (mb_font_face_t *)cface;
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	160 }
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	161
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	162 static
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	163 void free_font_face(mb_font_face_t *face) {
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	164 ASSERT(face == NULL);
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	165
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	166 cairo_font_face_destroy((cairo_font_face_t *)face);
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	167 }
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	168
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	169 /*! \brief This is scaled font for specified size and extent.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	170 *
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	171 * Font face only specified which font would be used to draw text
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	172 * message. But, it also need to scale glyphs to specified size and
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	173 * rotation. This function return a scaled font specified by a
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	174 * matrix that transform glyph from design space of the font to
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	175 * user space of cairo surface.
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	176 */
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	177 static
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	178 mb_scaled_font_t make_scaled_font_face_matrix(mb_font_face_t face,
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	179 co_aix *matrix) {
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	180 cairo_scaled_font_t *scaled_font;
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	181 cairo_matrix_t font_matrix;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	182 static cairo_matrix_t id = {
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	183 1, 0,
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	184 0, 1,
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	185 0, 0
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	186 };
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	187 static cairo_font_options_t *opt = NULL;
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	188
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	189 ASSERT(matrix != NULL);
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	190
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	191 if(opt == NULL) {
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	192 opt = cairo_font_options_create();
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	193 if(opt == NULL)
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	194 return NULL;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	195 }
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	196
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	197 font_matrix.xx = *matrix++;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	198 font_matrix.xy = *matrix++;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	199 font_matrix.x0 = *matrix++;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	200 font_matrix.yx = *matrix++;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	201 font_matrix.yy = *matrix++;
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	202 font_matrix.y0 = *matrix;
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	203 scaled_font = cairo_scaled_font_create((cairo_font_face_t *)face,
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	204 &font_matrix,
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	205 &id, opt);
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	206
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	207 return (mb_scaled_font_t *)scaled_font;
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	208 }
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	209
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	210 static
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	211 void scaled_font_free(mb_scaled_font_t *scaled_font) {
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	212 cairo_scaled_font_destroy((cairo_scaled_font_t *)scaled_font);
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	213 }
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	214
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	215 static
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	216 void compute_text_extents(mb_scaled_font_t scaled_font, const char txt,
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	217 mb_text_extents_t *extents) {
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	218 cairo_scaled_font_text_extents((cairo_scaled_font_t *)scaled_font,
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	219 txt,
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	220 (cairo_text_extents_t *)extents);
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	221 }
d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	222
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	223 static
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	224 mb_text_extents_t *mb_text_extents_new(void) {
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	225 cairo_text_extents_t *extents;
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	226
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	227 extents = (cairo_text_extents_t *)malloc(sizeof(cairo_text_extents_t));
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	228 return extents;
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	229 }
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	230
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	231 static
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	232 void mb_text_extents_free(mb_text_extents_t *extents) {
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	233 free(extents);
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	234 }
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	235
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	236 /* @} */
395 d30b575a4ad4 Add fontconfig layer Thinker K.F. Li <thinker@branda.to> parents: 394 diff changeset	237
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	238 /*! \brief Query and return a font face for a specified attribute vector.
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	239 *
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	240 * Programmers use mb_font_face_t to specify fonts used to show a
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	241 * block of text on the output device. They can get mb_font_face_t with
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	242 * this function. The objects return by mb_font_face_query() should be
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	243 * freed with mb_font_face_free() when they are not more used.
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	244 *
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	245 * \param family is the name of a font family (times).
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	246 * \param slant is one of \ref MB_FONT_SLANTS.
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	247 * \param weight decides if a font is thin or heavy.
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	248 */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	249 mb_font_face_t mb_font_face_query(redraw_man_t rdman,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	250 const char *family,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	251 int slant,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	252 int weight) {
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	253 return query_font_face(family, slant, weight);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	254 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	255
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	256 void mb_font_face_free(mb_font_face_t *face) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	257 ASSERT(face != NULL);
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	258 free_font_face(face);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	259 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	260
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	261 /*! \brief A simple implementation of text shape.
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	262 *
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	263 */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	264 typedef struct _sh_stext {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	265 shape_t shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	266 const char txt; /!< \brief Text to be showed */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	267 const mb_style_blk_t style_blks; /!< \brief Style of text */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	268 int nblks; /!< \brief Number of style blocks /
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	269 int max_nblks;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	270 co_aix x, y;
396 7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer Thinker K.F. Li <thinker@branda.to> parents: 395 diff changeset	271 mb_scaled_font_t **scaled_fonts;
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	272 mb_text_extents_t extents;
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	273 } sh_stext_t;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	274
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	275 shape_t rdman_shape_stext_new(redraw_man_t rdman, co_aix x, co_aix y,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	276 const char *txt) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	277 sh_stext_t *txt_o;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	278
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	279 ASSERT(txt != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	280
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	281 txt_o = (sh_stext_t *)malloc(sizeof(sh_stext_t));
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	282 if(txt_o == NULL)
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	283 return NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	284
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	285 memset(&txt_o->shape, 0, sizeof(shape_t));
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	286 mb_obj_init(txt_o, MBO_STEXT);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	287
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	288 txt_o->txt = strdup(txt);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	289 txt_o->style_blks = NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	290 txt_o->nblks = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	291 txt_o->max_nblks = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	292 txt_o->x = x;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	293 txt_o->y = y;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	294 txt_o->scaled_fonts = NULL;
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	295
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	296 if(txt_o->txt == NULL) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	297 free(txt_o);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	298 txt_o = NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	299 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	300
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	301 return (shape_t *)txt_o;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	302 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	303
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	304 static
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	305 int compute_utf8_chars_sz(const char *txt, int n_chars) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	306 int i;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	307 const char *p = txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	308
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	309 for(i = 0; i < n_chars && *p; i++) {
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	310 if(*p++ & 0x80)
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	311 continue; /* single byte */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	312 /* multi-bytes */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	313 while(p && ((p & 0xc0) == 0x80))
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	314 p++;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	315 }
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	316 if(i < n_chars)
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	317 return ERR;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	318
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	319 return p - txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	320 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	321
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	322 static
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	323 mb_scaled_font_t make_scaled_font_face(sh_stext_t txt_o,
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	324 mb_font_face_t *face,
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	325 co_aix shift_x, co_aix shift_y,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	326 co_aix font_sz) {
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	327 co_aix matrix[6], scaled_matrix[6];
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	328 co_aix *aggr;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	329 mb_scaled_font_t *scaled;
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	330
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	331 aggr = sh_get_aggr_matrix((shape_t *)txt_o);
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	332 matrix[0] = font_sz;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	333 matrix[1] = 0;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	334 matrix[2] = shift_x;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	335 matrix[3] = 0;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	336 matrix[4] = font_sz;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	337 matrix[5] += shift_y;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	338 matrix_mul(aggr, matrix, scaled_matrix);
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	339
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	340 scaled = make_scaled_font_face_matrix(face, scaled_matrix);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	341
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	342 return scaled;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	343 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	344
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	345 /*! \brief Extend an extents from another sub-extents.
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	346 *
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	347 * A styled text is styled by several styled blocks, so extents of
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	348 * blocks should be computed separated, collected, and aggreagated
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	349 * into a full extents.
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	350 */
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	351 static
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	352 void extent_extents(mb_text_extents_t full, mb_text_extents_t sub) {
407 92a459a1c5aa more comment Thinker K.F. Li <thinker@branda.to> parents: 403 diff changeset	353 co_aix f_rbx, f_rby; /* rb stands for right button */
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	354 co_aix s_rbx, s_rby;
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	355
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	356 f_rbx = MBE_GET_X_BEARING(full) + MBE_GET_WIDTH(full);
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	357 f_rby = MBE_GET_Y_BEARING(full) + MBE_GET_HEIGHT(full);
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	358 s_rbx = MBE_GET_X_BEARING(sub) + MBE_GET_WIDTH(sub);
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	359 s_rby = MBE_GET_Y_BEARING(sub) + MBE_GET_HEIGHT(sub);
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	360
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	361 /* set bearing */
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	362 if(MBE_GET_X_BEARING(full) > MBE_GET_X_BEARING(sub))
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	363 MBE_SET_X_BEARING(full, MBE_GET_X_BEARING(sub));
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	364 if(MBE_GET_Y_BEARING(full) > MBE_GET_Y_BEARING(sub))
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	365 MBE_SET_Y_BEARING(full, MBE_GET_Y_BEARING(sub));
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	366
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	367 /* set width/height */
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	368 if(f_rbx < s_rbx)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	369 MBE_SET_WIDTH(full, s_rbx - MBE_GET_X_BEARING(full));
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	370 if(f_rby < s_rby)
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	371 MBE_SET_HEIGHT(full, s_rby - MBE_GET_Y_BEARING(full));
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	372 }
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	373
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	374 /*! \brief Compute extents of a stext object according style blocks.
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	375 *
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	376 * It create scaled fonts for style blocks, compute their extents,
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	377 * and compute where they should be draw acoording advance of style
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	378 * blocks before a style block.
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	379 */
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	380 static
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	381 void compute_styled_extents_n_scaled_font(sh_stext_t *txt_o) {
aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	382 mb_text_extents_t sub_extents;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	383 const mb_style_blk_t *blk;
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	384 int blk_txt_len;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	385 mb_scaled_font_t **scaled_font;
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	386 char *txt, saved;
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	387 co_aix shift_x, shift_y;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	388 int i;
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	389
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	390 memset(&txt_o->extents, sizeof(mb_text_extents_t), 0);
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	391
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	392 blk = txt_o->style_blks;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	393 scaled_font = txt_o->scaled_fonts;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	394 txt = (char *)txt_o->txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	395 for(i = 0; i < txt_o->nblks; i++) {
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	396 shift_x = txt_o->x + MBE_GET_X_ADV(&txt_o->extents);
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	397 shift_y = txt_o->y + MBE_GET_Y_ADV(&txt_o->extents);
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	398
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	399 *scaled_font = make_scaled_font_face(txt_o, blk->face,
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	400 shift_x, shift_y, blk->font_sz);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	401 ASSERT(*scaled_font != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	402
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	403 blk_txt_len = compute_utf8_chars_sz(txt, blk->n_chars);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	404 ASSERT(blk_txt_len != ERR);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	405
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	406 saved = txt[blk_txt_len];
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	407 txt[blk_txt_len] = 0;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	408 compute_text_extents(*scaled_font, txt, &sub_extents);
397 55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	409 txt[blk_txt_len] = saved;
55f38c2cdb8f Refactor function of computing text extents Thinker K.F. Li <thinker@branda.to> parents: 396 diff changeset	410
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	411 extent_extents(&txt_o->extents, &sub_extents);
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	412
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	413 scaled_font++;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	414 blk++;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	415 txt += blk_txt_len;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	416 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	417 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	418
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	419 /*
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	420 * What we have to do in sh_stext_transform() is
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	421 * - computing bounding box for the text,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	422 * - computing offset x,y for the text of style blocks,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	423 * - free old scaled fonts, and
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	424 * - making scaled fonts for style blocks.
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	425 */
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	426 void sh_stext_transform(shape_t *shape) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	427 sh_stext_t txt_o = (sh_stext_t )shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	428
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	429 ASSERT(txt_o != NULL);
403 aee0f66b1154 Compute extents of a styled text Thinker K.F. Li <thinker@branda.to> parents: 397 diff changeset	430 compute_styled_extents_n_scaled_font(txt_o);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	431 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	432
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	433 void sh_stext_draw(shape_t shape, cairo_t cr) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	434 sh_stext_t txt_o = (sh_stext_t )shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	435
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	436 ASSERT(txt_o != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	437 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	438
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	439 int sh_stext_set_text(shape_t shape, const char txt) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	440 sh_stext_t txt_o = (sh_stext_t )shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	441 char *new_txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	442 int sz;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	443
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	444 ASSERT(txt_o != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	445 ASSERT(txt != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	446
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	447 sz = strlen(txt) + 1;
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	448 new_txt = (char )realloc((void )txt_o->txt, sz);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	449 if(new_txt == NULL)
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	450 return ERR;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	451
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	452 memcpy(new_txt, txt, sz);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	453 txt_o->txt = new_txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	454
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	455 return OK;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	456 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	457
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	458 int sh_stext_set_style(shape_t *shape,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	459 const mb_style_blk_t *blks,
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	460 int nblks) {
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	461 sh_stext_t txt_o = (sh_stext_t )shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	462 mb_style_blk_t *new_blks;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	463 int sz;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	464
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	465 ASSERT(txt_o != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	466 ASSERT(nblks >= 0);
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	467
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	468 if(nblks > txt_o->max_nblks) {
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	469 sz = nblks * sizeof(mb_style_blk_t);
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	470 new_blks = (mb_style_blk_t )realloc((void )txt_o->style_blks, sz);
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	471 if(new_blks == NULL)
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	472 return ERR;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	473
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	474 txt_o->style_blks = new_blks;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	475 txt_o->max_nblks = nblks;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	476 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	477
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	478 memcpy(txt_o->style_blks, blks, nblks * sizeof(mb_style_blk_t));
393 27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	479 txt_o->nblks = nblks;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	480
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	481 return OK;
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	482 }
27774b93521e Add sh_stext_t to implement a simple version of text shape. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	483
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	484 #ifdef UNITTEST
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	485
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	486 #include <CUnit/Basic.h>
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	487
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	488 static
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	489 void test_query_font_face(void) {
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	490 mb_font_face_t *face;
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	491 cairo_status_t status;
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	492
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	493 face = query_font_face("serif", MB_FONT_SLANT_ROMAN, 100);
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	494 CU_ASSERT(face != NULL);
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	495 status = cairo_font_face_status(face);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	496 CU_ASSERT(status == CAIRO_STATUS_SUCCESS);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	497
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	498 free_font_face(face);
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	499 }
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	500
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	501 static
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	502 void test_make_scaled_font_face_matrix(void) {
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	503 co_aix matrix[6] = {5, 0, 0, 0, 5, 0};
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	504 mb_font_face_t *face;
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	505 mb_scaled_font_t *scaled;
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	506 cairo_status_t status;
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	507
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	508 face = query_font_face("serif", MB_FONT_SLANT_ROMAN, 100);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	509 CU_ASSERT(face != NULL);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	510 status = cairo_font_face_status(face);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	511 CU_ASSERT(status == CAIRO_STATUS_SUCCESS);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	512
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	513 scaled = make_scaled_font_face_matrix(face, matrix);
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	514 CU_ASSERT(scaled != NULL);
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	515 status = cairo_scaled_font_status(scaled);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	516 CU_ASSERT(status == CAIRO_STATUS_SUCCESS);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	517
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	518 scaled_font_free(scaled);
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	519 free_font_face(face);
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	520 }
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	521
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	522 static
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	523 void test_compute_text_extents(void) {
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	524 co_aix matrix[6] = {10, 0, 0, 0, 10, 0};
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	525 mb_font_face_t *face;
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	526 mb_scaled_font_t *scaled;
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	527 mb_text_extents_t ext;
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	528
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	529 face = query_font_face("serif", MB_FONT_SLANT_ROMAN, 100);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	530 CU_ASSERT(face != NULL)
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	531 scaled = make_scaled_font_face_matrix(face, matrix);
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	532 CU_ASSERT(scaled != NULL);
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	533
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	534 compute_text_extents(scaled, "test", &ext);
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	535 CU_ASSERT(ext.height >= 5 && ext.height <= 12);
35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	536 CU_ASSERT(ext.width >= 16 && ext.width <= 48);
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	537
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	538 scaled_font_free(scaled);
413 35712e4bad0e Make shape_stext.c pass test cases. Thinker K.F. Li <thinker@branda.to> parents: 412 diff changeset	539 free_font_face(face);
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	540 }
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	541
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	542 #include <CUnit/Basic.h>
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	543 CU_pSuite get_stext_suite(void) {
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	544 CU_pSuite suite;
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	545
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	546 suite = CU_add_suite("Suite_stext", NULL, NULL);
412 a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	547 CU_ADD_TEST(suite, test_query_font_face);
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	548 CU_ADD_TEST(suite, test_make_scaled_font_face_matrix);
a456e267279a Test cases for shape_stext. Thinker K.F. Li <thinker@branda.to> parents: 411 diff changeset	549 CU_ADD_TEST(suite, test_compute_text_extents);
410 1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	550 CU_ADD_TEST(suite, test_compute_text_extents);
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	551
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	552 return suite;
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	553 }
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	554
1a923ea699c1 shape_stext.c, now, is unittested. Thinker K.F. Li <thinker@branda.to> parents: 407 diff changeset	555 #endif /* UNITTEST */

Mercurial > MadButterfly

annotate src/shape_stext.c @ 413:35712e4bad0e