libs/clearlooks-newer/cairo-support.h

   1 /* Helpful functions when dealing with cairo in gtk engines */
   2
   3 #include <gtk/gtk.h>
   4 #include <math.h>
   5
   6 typedef struct
   7 {
   8         gdouble r;
   9         gdouble g;
  10         gdouble b;
  11         gdouble a;
  12 } CairoColor;
  13
  14 typedef struct
  15 {
  16         CairoColor bg[5];
  17         CairoColor fg[5];
  18
  19         CairoColor dark[5];
  20         CairoColor light[5];
  21         CairoColor mid[5];
  22
  23         CairoColor base[5];
  24         CairoColor text[5];
  25         CairoColor text_aa[5];
  26
  27         CairoColor black;
  28         CairoColor white;
  29 } CairoColorCube;
  30
  31 typedef enum
  32 {
  33         CR_CORNER_NONE        = 0,
  34         CR_CORNER_TOPLEFT     = 1,
  35         CR_CORNER_TOPRIGHT    = 2,
  36         CR_CORNER_BOTTOMLEFT  = 4,
  37         CR_CORNER_BOTTOMRIGHT = 8,
  38         CR_CORNER_ALL         = 15
  39 } CairoCorners;
  40
  41 typedef enum
  42 {
  43         CR_MIRROR_NONE       = 0,
  44         CR_MIRROR_HORIZONTAL = 1 << 0,
  45         CR_MIRROR_VERTICAL   = 1 << 1
  46 } CairoMirror;
  47
  48 /*****************************/
  49 /* Pattern Fills             */
  50 /*****************************/
  51 typedef enum {
  52         GE_DIRECTION_VERTICAL,
  53         GE_DIRECTION_HORIZONTAL,
  54         GE_DIRECTION_BOTH,
  55         GE_DIRECTION_NONE
  56 } GeDirection;
  57
  58 #if  ((CAIRO_VERSION_MAJOR < 1) || ((CAIRO_VERSION_MAJOR == 1) && (CAIRO_VERSION_MINOR < 2)))
  59 typedef enum _cairo_pattern_type {
  60     CAIRO_PATTERN_TYPE_SOLID,
  61     CAIRO_PATTERN_TYPE_SURFACE,
  62     CAIRO_PATTERN_TYPE_LINEAR,
  63     CAIRO_PATTERN_TYPE_RADIAL
  64 } cairo_pattern_type_t;
  65
  66 #       define CAIRO_PATTERN_TYPE(pattern) pattern->type;
  67 #else
  68 #       define CAIRO_PATTERN_TYPE(pattern) cairo_pattern_get_type (pattern->handle);
  69 #endif
  70
  71 typedef struct
  72 {
  73 #if  ((CAIRO_VERSION_MAJOR < 1) || ((CAIRO_VERSION_MAJOR == 1) && (CAIRO_VERSION_MINOR < 2)))
  74         cairo_pattern_type_t type;
  75 #endif
  76         GeDirection scale;
  77         GeDirection translate;
  78
  79         cairo_pattern_t *handle;
  80         cairo_operator_t operator;
  81 } CairoPattern;
  82
  83 GE_INTERNAL void ge_hsb_from_color (const CairoColor *color, gdouble *hue, gdouble *saturation, gdouble *brightness);
  84 GE_INTERNAL void ge_color_from_hsb (gdouble hue, gdouble saturation, gdouble brightness, CairoColor *color);
  85
  86 GE_INTERNAL void ge_gdk_color_to_cairo (const GdkColor * gc, CairoColor * cc);
  87 GE_INTERNAL void ge_cairo_color_to_gtk (const CairoColor *cc, GdkColor *c);
  88 GE_INTERNAL void ge_gtk_style_to_cairo_color_cube (GtkStyle * style, CairoColorCube *cube);
  89
  90 GE_INTERNAL void ge_shade_color(const CairoColor *base, gdouble shade_ratio, CairoColor *composite);
  91 GE_INTERNAL void ge_saturate_color (const CairoColor * base, gdouble saturate_level, CairoColor *composite);
  92 GE_INTERNAL void ge_mix_color (const CairoColor *color1, const CairoColor *color2, gdouble mix_factor, CairoColor *composite);
  93
  94 GE_INTERNAL cairo_t * ge_gdk_drawable_to_cairo (GdkDrawable  *window, GdkRectangle *area);
  95 GE_INTERNAL void ge_cairo_set_color (cairo_t *cr, const CairoColor *color);
  96 GE_INTERNAL void ge_cairo_set_gdk_color_with_alpha (cairo_t *cr, const GdkColor *color, gdouble alpha);
  97 GE_INTERNAL void ge_cairo_pattern_add_color_stop_color (cairo_pattern_t *pattern, gfloat offset, const CairoColor *color);
  98 GE_INTERNAL void ge_cairo_pattern_add_color_stop_shade (cairo_pattern_t *pattern, gdouble offset, const CairoColor *color, gdouble shade);
  99
 100 GE_INTERNAL void ge_cairo_rounded_corner (cairo_t *cr, double x, double y, double radius, CairoCorners corner);
 101 GE_INTERNAL void ge_cairo_rounded_rectangle (cairo_t *cr, double x, double y, double w, double h, double radius, CairoCorners corners);
 102
 103 GE_INTERNAL void ge_cairo_stroke_rectangle (cairo_t *cr, double x, double y, double w, double h);
 104 GE_INTERNAL void ge_cairo_simple_border (cairo_t *cr, const CairoColor * tl, const CairoColor * br, gint x, gint y, gint width, gint height, gboolean topleft_overlap);
 105
 106 GE_INTERNAL void ge_cairo_line (cairo_t *cr, const CairoColor *color, gint x1, gint y1, gint x2, gint y2);
 107 GE_INTERNAL void ge_cairo_polygon (cairo_t *cr, const CairoColor *color, GdkPoint *points, gint npoints);
 108
 109 GE_INTERNAL void ge_cairo_mirror (cairo_t *cr, CairoMirror mirror, gint *x, gint *y, gint *width, gint *height);
 110 GE_INTERNAL void ge_cairo_exchange_axis (cairo_t *cr, gint *x, gint *y, gint *width, gint *height);
 111
 112 GE_INTERNAL void ge_cairo_pattern_fill(cairo_t *canvas, CairoPattern *pattern, gint x, gint y, gint width, gint height);
 113
 114 GE_INTERNAL CairoPattern *ge_cairo_color_pattern(CairoColor *base);
 115 GE_INTERNAL CairoPattern *ge_cairo_pixbuf_pattern(GdkPixbuf *pixbuf);
 116 GE_INTERNAL CairoPattern *ge_cairo_pixmap_pattern(GdkPixmap *pixmap);
 117 GE_INTERNAL CairoPattern *ge_cairo_linear_shade_gradient_pattern(CairoColor *base, gdouble shade1, gdouble shade2, gboolean vertical);
 118 GE_INTERNAL void ge_cairo_pattern_destroy(CairoPattern *pattern);