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comparison include/mb_graph_engine_skia.h @ 472:4254eaa699d0 Android_Skia

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Declare functions that should be implemented by Skia graphic engine
author Thinker K.F. Li <thinker@branda.to>
date Thu, 12 Nov 2009 21:32:52 +0800
parents e54cd19cec28
children ba64f928542b
comparison
equal deleted inserted replaced
471:e98ae1407ca2 472:4254eaa699d0
5 #include "mb_img_ldr.h" 5 #include "mb_img_ldr.h"
6 6
7 /*! \defgroup mb_ge_skia MadButterfly Graphic Engine with Skia 7 /*! \defgroup mb_ge_skia MadButterfly Graphic Engine with Skia
8 * @{ 8 * @{
9 */ 9 */
10 #define MBE_OPERATOR_CLEAR CAIRO_OPERATOR_CLEAR 10 #define MBE_OPERATOR_CLEAR 2
11 #define MBE_OPERATOR_SOURCE CAIRO_OPERATOR_SOURCE 11 #define MBE_OPERATOR_SOURCE 1
12 #define MBE_STATUS_SUCCESS CAIRO_STATUS_SUCCESS 12 #define MBE_STATUS_SUCCESS 0
13 13
14 #define mbe_image_surface_create_from_png 14 typedef float co_aix;
15 #define mbe_pattern_add_color_stop_rgba 15
16 struct _mbe_text_extents_t {
17 co_aix x_bearing;
18 co_aix y_bearing;
19 co_aix width;
20 co_aix height;
21 co_aix x_advance;
22 co_aix y_advance;
23 };
24 struct _mbe_scaled_font_t;
25 struct _mbe_font_face_t;
26 struct _mbe_surface_t;
27 struct _mbe_pattern_t;
28 struct _mbe_t;
29
30 typedef struct _mbe_text_extents_t mbe_text_extents_t;
31 typedef struct _mbe_scaled_font_t mbe_scaled_font_t;
32 typedef struct _mbe_font_face_t mbe_font_face_t;
33 typedef struct _mbe_surface_t mbe_surface_t;
34 typedef struct _mbe_pattern_t mbe_pattern_t;
35 typedef struct {
36 co_aix xx; co_aix yx;
37 co_aix xy; co_aix yy;
38 co_aix x0; co_aix y0;
39 } mbe_matrix_t;
40 typedef struct _mbe_t mbe_t;
41
42 extern void mbe_pattern_add_color_stop_rgba(mbe_pattern_t *ptn,
43 co_aix offset,
44 co_aix r, co_aix g, co_aix b,
45 co_aix a);
16 #define mbe_pattern_create_for_surface 46 #define mbe_pattern_create_for_surface
17 #define mbe_scaled_font_text_extents 47 extern void mbe_scaled_font_text_extents(mbe_scaled_font_t *scaled,
18 #define mbe_image_surface_get_stride 48 const char *txt,
19 #define mbe_image_surface_get_height 49 mbe_text_extents_t *extents);
20 #define mbe_image_surface_get_width 50 extern int mbe_image_surface_get_stride(mbe_surface_t *surface);
21 #define mbe_image_surface_get_data 51 extern int mbe_image_surface_get_height(mbe_surface_t *surface);
22 #define mbe_scaled_font_reference 52 extern int mbe_image_surface_get_width(mbe_surface_t *surface);
23 #define mbe_pattern_create_radial 53 extern unsigned char *mbe_image_surface_get_data(mbe_surface_t *surface);
24 #define mbe_pattern_create_linear 54 extern mbe_scaled_font_t *mbe_scaled_font_reference(mbe_scaled_font_t *scaled);
25 #define mbe_scaled_font_destroy 55 extern mbe_pattern_t *mbe_pattern_create_radial(co_aix cx0, co_aix cy0,
26 #define mbe_font_face_reference 56 co_aix radius0,
27 #define mbe_set_source_surface 57 co_aix cx1, co_aix cy1,
28 #define mbe_scaled_font_create 58 co_aix radius1);
29 #define mbe_pattern_set_matrix 59 extern mbe_pattern_t *mbe_pattern_create_linear(co_aix x0, co_aix y0,
30 #define mbe_font_face_destroy 60 co_aix x1, co_aix y1);
31 #define mbe_paint_with_alpha 61 extern void mbe_scaled_font_destroy(mbe_scaled_font_t *scaled);
32 #define mbe_surface_destroy 62 extern mbe_font_face_t *mbe_font_face_reference(mbe_font_face_t *face);
33 #define mbe_set_source_rgba 63 extern void mbe_set_source_surface(mbe_t *canvas, mbe_surface_t *surface,
34 #define mbe_set_scaled_font 64 co_aix x, co_aix y);
35 #define mbe_pattern_destroy 65 extern mbe_scaled_font_t *
36 #define mbe_get_scaled_font 66 mbe_scaled_font_create(mbe_font_face_t *face, mbe_matrix_t *fnt_mtx,
37 #define mbe_set_source_rgb 67 mbe_matrix_t *ctm);
38 #define mbe_set_line_width 68 extern void mbe_pattern_set_matrix(mbe_pattern_t *ptn,
39 #define mbe_get_font_face 69 const mbe_matrix_t *matrix);
40 #define mbe_fill_preserve 70 extern void mbe_font_face_destroy(mbe_font_face_t *face);
41 #define mbe_set_source 71 extern void mbe_paint_with_alpha(mbe_t *canvas, co_aix alpha);
42 #define mbe_reset_clip 72 extern void mbe_surface_destroy(mbe_surface_t *surface);
43 #define mbe_get_target 73 extern void mbe_set_source_rgba(mbe_t *canvas,
44 #define mbe_close_path 74 co_aix r, co_aix g, co_aix b, co_aix a);
45 #define mbe_text_path 75 extern void mbe_set_scaled_font(mbe_t *canvas,
46 #define mbe_rectangle 76 const mbe_scaled_font_t *scaled);
47 #define mbe_in_stroke 77 extern void mbe_set_source_rgb(mbe_t *canvas, co_aix r, co_aix g, co_aix b);
48 #define mbe_new_path 78 extern void mbe_set_line_width(mbe_t *canvas, co_aix width);
49 #define mbe_curve_to 79 extern mbe_font_face_t *mbe_get_font_face(mbe_t *canvas);
50 #define mbe_restore 80 extern void mbe_fill_preserve(mbe_t *canvas);
51 #define mbe_move_to 81 extern void mbe_set_source(mbe_t *canvas, mbe_pattern_t *source);
52 #define mbe_line_to 82 extern void mbe_reset_clip(mbe_t *canvas);
53 #define mbe_in_fill 83 extern mbe_surface_t *mbe_get_target(mbe_t *canvas);
54 #define mbe_destroy 84 extern void mbe_close_path(mbe_t *canvas);
55 #define mbe_stroke 85 extern void mbe_text_path(mbe_t *canvas, const char *txt);
56 #define mbe_create 86 extern void mbe_rectangle(mbe_t *canvas, co_aix x, co_aix y,
57 #define mbe_paint 87 co_aix width, co_aix height);
58 #define mbe_save 88 extern int mbe_in_stroke(mbe_t *canvas, co_aix x, co_aix y);
59 #define mbe_fill 89 extern void mbe_new_path(mbe_t *canvas);
60 #define mbe_clip 90 extern void mbe_curve_to(mbe_t *canvas, co_aix x1, co_aix y1,
61 91 co_aix x2, co_aix y2,
62 typedef cairo_text_extents_t mbe_text_extents_t; 92 co_aix x3, co_aix y3);
63 typedef cairo_scaled_font_t mbe_scaled_font_t; 93 extern void mbe_restore(mbe_t *canvas);
64 typedef cairo_font_face_t mbe_font_face_t; 94 extern void mbe_move_to(mbe_t *canvas, co_aix x, co_aix y);
65 typedef cairo_surface_t mbe_surface_t; 95 extern void mbe_line_to(mbe_t *canvas, co_aix x, co_aix y);
66 typedef cairo_pattern_t mbe_pattern_t; 96 extern int mbe_in_fill(mbe_t *canvas, co_aix x, co_aix y);
67 typedef cairo_matrix_t mbe_matrix_t; 97 extern void mbe_stroke(mbe_t *canvas);
68 typedef cairo_t mbe_t; 98 extern mbe_t *mbe_create(mbe_surface_t *target);
69 typedef float co_aix; 99 extern void mbe_destroy(mbe_t *canvas);
100 extern void mbe_paint(mbe_t *canvas);
101 extern void mbe_save(mbe_t *canvas);
102 extern void mbe_fill(mbe_t *canvas);
103 extern void mbe_clip(mbe_t *canvas);
70 104
71 extern mbe_font_face_t * mbe_query_font_face(const char *family, 105 extern mbe_font_face_t * mbe_query_font_face(const char *family,
72 int slant, int weight); 106 int slant, int weight);
73 extern void mbe_free_font_face(mbe_font_face_t *face); 107 extern void mbe_free_font_face(mbe_font_face_t *face);
74 108
75 static void mbe_clear(mbe_t *canvas) { 109 extern void mbe_clear(mbe_t *canvas);
76 cairo_operator_t old_op; 110 extern void mbe_copy_source(mbe_t *canvas);
77 111 extern mbe_surface_t *
78 old_op = mbe_get_operator(canvas);
79 mbe_set_operator(canvas, MBE_OPERATOR_CLEAR);
80 mbe_paint(canvas);
81 mbe_set_operator(canvas, old_op);
82 }
83
84 static void mbe_copy_source(mbe_t *canvas) {
85 mbe_operator_t saved_op;
86
87 saved_op = mbe_get_operator(canvas);
88 mbe_set_operator(canvas, MBE_OPERATOR_SOURCE);
89 mbe_paint(canvas);
90 mbe_set_operator(canvas, saved_op);
91 }
92
93 static mbe_surface_t *
94 mbe_image_surface_create_for_data(unsigned char *data, 112 mbe_image_surface_create_for_data(unsigned char *data,
95 mb_img_fmt_t fmt, 113 mb_img_fmt_t fmt,
96 int width, int height, 114 int width, int height,
97 int stride) { 115 int stride);
98 cairo_format_t _fmt; 116 extern mb_img_fmt_t mbe_image_surface_get_format(mbe_surface_t *surface);
99 117 extern mbe_surface_t *
100 switch(fmt) { 118 mbe_image_surface_create(mb_img_fmt_t fmt, int width, int height);
101 case MB_IFMT_ARGB32: 119 extern void mbe_transform(mbe_t *mbe, mbe_matrix_t *matrix);
102 _fmt = CAIRO_FORMAT_ARGB32; 120 extern void mbe_arc(mbe_t *mbe, co_aix x, co_aix y, co_aix radius,
103 break; 121 co_aix angle_start, co_aix angle_stop);
104 case MB_IFMT_RGB24:
105 _fmt = CAIRO_FORMAT_RGB24;
106 break;
107 case MB_IFMT_A8:
108 _fmt = CAIRO_FORMAT_A8;
109 break;
110 case MB_IFMT_A1:
111 _fmt = CAIRO_FORMAT_A1;
112 break;
113 default:
114 return NULL;
115 }
116 return cairo_image_surface_create_for_data(data, _fmt,
117 width, height, stride);
118 }
119
120 static mb_img_fmt_t
121 mbe_image_surface_get_format(mbe_surface_t *surface) {
122 cairo_format_t _fmt;
123 mb_img_fmt_t fmt;
124
125 _fmt = cairo_image_surface_get_format(surface);
126 switch(_fmt) {
127 case CAIRO_FORMAT_ARGB32:
128 fmt = MB_IFMT_ARGB32;
129 break;
130 case CAIRO_FORMAT_RGB24:
131 fmt = MB_IFMT_RGB24;
132 break;
133 case CAIRO_FORMAT_A8:
134 fmt = MB_IFMT_A8;
135 break;
136 case CAIRO_FORMAT_A1:
137 fmt = MB_IFMT_A1;
138 break;
139 default:
140 fmt = MB_IFMT_DUMMY;
141 break;
142 }
143
144 return fmt;
145 }
146
147 static mbe_surface_t *
148 mbe_image_surface_create(mb_img_fmt_t fmt, int width, int height) {
149 cairo_format_t _fmt;
150
151 switch(fmt) {
152 case MB_IFMT_ARGB32:
153 _fmt = CAIRO_FORMAT_ARGB32;
154 break;
155 case MB_IFMT_RGB24:
156 _fmt = CAIRO_FORMAT_RGB24;
157 break;
158 case MB_IFMT_A8:
159 _fmt = CAIRO_FORMAT_A8;
160 break;
161 case MB_IFMT_A1:
162 _fmt = CAIRO_FORMAT_A1;
163 break;
164 default:
165 return NULL;
166 }
167
168 return cairo_image_surface_create(_fmt, width, height);
169 }
170
171 static void
172 mbe_transform(mbe_t *mbe, const co_aix matrix[6]) {
173 cairo_matrix_t cmtx;
174
175 cmtx.xx = matrix[0];
176 cmtx.xy = matrix[1];
177 cmtx.x0 = matrix[2];
178 cmtx.yx = matrix[3];
179 cmtx.yy = matrix[4];
180 cmtx.y0 = matrix[5];
181
182 cairo_transform(mbe, &cmtx);
183 }
184
185 static void
186 mbe_arc(mbe_t *mbe, co_aix x, co_aix y, co_aix radius,
187 co_aix angle_start, co_aix angle_stop) {
188 if(angle_start <= angle_stop)
189 cairo_arc(mbe, x, y, radius, angle_start, angle_stop);
190 else
191 cairo_arc_negative(mbe, x, y, radius, angle_start, angle_stop);
192 }
193 /* @} */ 122 /* @} */
194 123
195 #endif /* __MB_GE_SKIA_H_ */ 124 #endif /* __MB_GE_SKIA_H_ */