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annotate src/paint.c @ 1472:7cb7abb5063b

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Refactory drawing functions into classes for state and transition
author Thinker K.F. Li <thinker@codemud.net>
date Sun, 24 Apr 2011 15:13:41 +0800
parents 7bd6c0e88ec8
children
rev   line source
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586e50f82c1f Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
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2 // vim: sw=4:ts=8:sts=4
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include "mb_graph_engine.h"
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6 #include "mb_paint.h"
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7
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8 #define ASSERT(x)
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9
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10 /*! \brief Solid color paint.
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11 */
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12 typedef struct _paint_color {
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13 paint_t paint;
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14 co_comp_t r, g, b, a;
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15 } paint_color_t;
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16
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17 int _paint_color_size = sizeof(paint_color_t);
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18
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19
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20 static void paint_color_prepare(paint_t *paint, mbe_t *cr, shape_t *sh) {
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21 paint_color_t *color = (paint_color_t *)paint;
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22
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23 mbe_set_source_rgba(cr, color->r, color->g, color->b, color->a);
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24 }
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25
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26 static void paint_color_free(redraw_man_t *rdman, paint_t *paint) {
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27 shnode_list_free(rdman, paint->members);
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28 paint_destroy(paint);
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29 elmpool_elm_free(rdman->paint_color_pool, paint);
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30 }
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31
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32 paint_t *rdman_paint_color_new(redraw_man_t *rdman,
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33 co_comp_t r, co_comp_t g,
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34 co_comp_t b, co_comp_t a) {
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35 paint_color_t *color;
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36
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37 color = (paint_color_t *)elmpool_elm_alloc(rdman->paint_color_pool);
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38 if(color == NULL)
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39 return NULL;
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40 color->r = r;
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41 color->g = g;
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42 color->b = b;
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43 color->a = a;
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44 paint_init(&color->paint, MBP_COLOR,
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45 paint_color_prepare, paint_color_free);
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46 return (paint_t *)color;
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47 }
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48
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49 void paint_color_set(paint_t *paint,
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50 co_comp_t r, co_comp_t g,
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51 co_comp_t b, co_comp_t a) {
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52 paint_color_t *color = (paint_color_t *)paint;
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53
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54 color->r = r;
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55 color->g = g;
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56 color->b = b;
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57 color->a = a;
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58 }
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59
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60 void paint_color_get(paint_t *paint,
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61 co_comp_t *r, co_comp_t *g,
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62 co_comp_t *b, co_comp_t *a) {
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63 paint_color_t *color = (paint_color_t *)paint;
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64
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65 *r = color->r;
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66 *g = color->g;
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67 *b = color->b;
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68 *a = color->a;
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69 }
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70
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71 /*! \brief Linear gradient.
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72 */
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73 typedef struct _paint_linear {
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74 paint_t paint;
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75 co_aix x1, y1;
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76 co_aix x2, y2;
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77 int n_stops;
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78 grad_stop_t *stops;
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79 int flags;
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80 mbe_pattern_t *ptn;
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81 } paint_linear_t;
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82
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83 #define LIF_DIRTY 0x1
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84
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85 int _paint_linear_size = sizeof(paint_linear_t);
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86
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87 static void paint_linear_prepare(paint_t *paint, mbe_t *cr, shape_t *sh) {
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88 paint_linear_t *linear = (paint_linear_t *)paint;
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89 mbe_pattern_t *ptn;
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90 co_aix x1, y1;
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91 co_aix x2, y2;
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92 co_aix *mtx;
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93
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94 ptn = linear->ptn;
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95 if(linear->flags & LIF_DIRTY) {
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96 mtx = sh_get_aggr_matrix(sh);
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97 x1 = linear->x1;
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98 y1 = linear->y1;
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99 matrix_trans_pos(mtx, &x1, &y1);
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100 x2 = linear->x2;
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101 y2 = linear->y2;
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102 matrix_trans_pos(mtx, &x2, &y2);
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103
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104 if(ptn)
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105 mbe_pattern_destroy(ptn);
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106 linear->flags &= ~LIF_DIRTY;
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107 ptn = mbe_pattern_create_linear(x1, y1, x2, y2,
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108 linear->stops, linear->n_stops);
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109 ASSERT(ptn != NULL);
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110 linear->ptn = ptn;
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111 }
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112
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113 mbe_set_source(cr, ptn);
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114 }
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115
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116 static void paint_linear_free(redraw_man_t *rdman, paint_t *paint) {
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117 paint_linear_t *linear = (paint_linear_t *)paint;
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118
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119 if(linear->ptn)
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120 mbe_pattern_destroy(linear->ptn);
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121 paint_destroy(paint);
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122 elmpool_elm_free(rdman->paint_linear_pool, linear);
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123 }
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124
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125 paint_t *rdman_paint_linear_new(redraw_man_t *rdman,
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126 co_aix x1, co_aix y1,
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127 co_aix x2, co_aix y2) {
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128 paint_linear_t *linear;
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129
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130 linear = (paint_linear_t *)elmpool_elm_alloc(rdman->paint_linear_pool);
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131 if(linear == NULL)
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132 return NULL;
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133
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134 paint_init(&linear->paint, MBP_LINEAR,
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135 paint_linear_prepare, paint_linear_free);
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136
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137 linear->x1 = x1;
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138 linear->y1 = y1;
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139 linear->x2 = x2;
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140 linear->y2 = y2;
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141 linear->n_stops = 0;
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142 linear->stops = NULL;
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143 linear->flags = LIF_DIRTY;
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144 linear->ptn = NULL;
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145
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146 return (paint_t *)linear;
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147 }
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148
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149 /*! \brief Setup color stop for a linear radient paint.
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150 *
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151 * stops should be managed by users of the function. It should be
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152 * available before the paint being freed or changed to another
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153 * array of stops.
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154 */
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155 grad_stop_t *paint_linear_stops(paint_t *paint,
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156 int n_stops,
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157 grad_stop_t *stops) {
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158 paint_linear_t *linear = (paint_linear_t *)paint;
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159 grad_stop_t *old_stops;
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160
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161 old_stops = linear->stops;
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162 linear->n_stops = n_stops;
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163 linear->stops = stops;
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164 linear->flags |= LIF_DIRTY;
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165
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166 return old_stops;
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167 }
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168
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169 /*! \brief Radial gradient.
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170 *
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171 * NOTE: The only supported gradient unit is userSpaceOnUse.
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172 */
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173 typedef struct _paint_radial {
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174 paint_t paint;
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175 co_aix cx, cy;
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176 co_aix r;
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177 int n_stops;
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178 grad_stop_t *stops;
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179 int flags;
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180 mbe_pattern_t *ptn;
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181 } paint_radial_t;
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182
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183 #define RDF_DIRTY 0x1
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184
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185 #define pnt_radial_clear_flags(radial, _flags) \
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186 do { \
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187 (radial)->flags &= ~(_flags); \
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188 } while(0)
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189
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190 int _paint_radial_size = sizeof(paint_radial_t);
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191
881
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192 static void paint_radial_prepare(paint_t *paint, mbe_t *cr, shape_t *sh) {
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193 paint_radial_t *radial = (paint_radial_t *)paint;
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194 mbe_pattern_t *ptn;
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195 co_aix cx, cy;
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196 co_aix *mtx;
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197
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198 if(radial->flags & RDF_DIRTY) {
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199 mtx = sh_get_aggr_matrix(sh);
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200 cx = radial->cx;
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201 cy = radial->cy;
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202 matrix_trans_pos(mtx, &cx, &cy);
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203
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204 ptn = mbe_pattern_create_radial(cx, cy, 0,
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205 cx, cy,
480
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206 radial->r,
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207 radial->stops,
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208 radial->n_stops);
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209 ASSERT(ptn != NULL);
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210 if(radial->ptn)
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211 mbe_pattern_destroy(radial->ptn);
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212 radial->ptn = ptn;
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213
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214 pnt_radial_clear_flags(radial, RDF_DIRTY);
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215 }
448
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216 mbe_set_source(cr, radial->ptn);
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217 }
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218
159
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219 static void paint_radial_free(redraw_man_t *rdman, paint_t *paint) {
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220 paint_radial_t *radial = (paint_radial_t *)paint;
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221
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222 if(radial->ptn)
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223 mbe_pattern_destroy(radial->ptn);
260
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224 paint_destroy(paint);
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225 elmpool_elm_free(rdman->paint_radial_pool, radial);
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226 }
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227
159
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228 paint_t *rdman_paint_radial_new(redraw_man_t *rdman,
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229 co_aix cx, co_aix cy, co_aix r) {
55
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230 paint_radial_t *radial;
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231
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232 radial = elmpool_elm_alloc(rdman->paint_radial_pool);
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233 if(radial == NULL)
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234 return NULL;
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235
356
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diff changeset
236 paint_init(&radial->paint, MBP_RADIAL,
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237 paint_radial_prepare, paint_radial_free);
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238 radial->cx = cx;
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239 radial->cy = cy;
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240 radial->r = r;
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241 radial->n_stops = 0;
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242 radial->stops = NULL;
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243 radial->flags = RDF_DIRTY;
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244 radial->ptn = NULL;
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245
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246 return (paint_t *)radial;
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247 }
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248
58
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249 /*! \brief Setup color stop for a radial radient paint.
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250 *
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251 * stops should be managed by users of the function. It should be
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252 * available before the paint being freed or changed to another
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253 * array of stops.
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254 */
55
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255 grad_stop_t *paint_radial_stops(paint_t *paint,
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256 int n_stops,
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diff changeset
257 grad_stop_t *stops) {
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258 paint_radial_t *radial = (paint_radial_t *)paint;
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259 grad_stop_t *old_stops;
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260
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261 old_stops = radial->stops;
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262 radial->n_stops = n_stops;
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263 radial->stops = stops;
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264 radial->flags |= RDF_DIRTY;
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265
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266 return old_stops;
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267 }
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268
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
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269
265
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270 /*! \brief Using an image as a paint.
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271 *
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272 * This type of paints fill/stroke shapes with an image.
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273 */
260
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diff changeset
274 typedef struct _paint_image {
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diff changeset
275 paint_t paint;
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diff changeset
276 mb_img_data_t *img;
448
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diff changeset
277 mbe_pattern_t *ptn;
260
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diff changeset
278 } paint_image_t;
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diff changeset
279
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280 int _paint_image_size = sizeof(paint_image_t);
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281
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282 static
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283 void paint_image_prepare(paint_t *paint, mbe_t *cr, shape_t *sh) {
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284 paint_image_t *paint_img = (paint_image_t *)paint;
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285
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286 mbe_set_source(cr, paint_img->ptn);
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287 }
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288
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289 static
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290 void paint_image_free(redraw_man_t *rdman, paint_t *paint) {
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291 paint_image_t *paint_img = (paint_image_t *)paint;
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292 mb_img_data_t *img_data;
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293
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294 img_data = paint_img->img;
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295 MB_IMG_DATA_FREE(img_data);
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296 paint_destroy(&paint_img->paint);
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297 mbe_pattern_destroy(paint_img->ptn);
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298 elmpool_elm_free(rdman->paint_image_pool, paint_img);
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299 }
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300
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301 /*! \brief Create an image painter.
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302 *
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303 * Create a painter that fill/stroke shapes with an image.
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304 *
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305 * \param img is image data return by image load.
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306 * Owner-ship of img is transfered.
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307 */
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308 paint_t *rdman_paint_image_new(redraw_man_t *rdman,
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309 mb_img_data_t *img) {
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310 paint_image_t *paint;
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311
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312 paint = elmpool_elm_alloc(rdman->paint_image_pool);
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313 if(paint == NULL)
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314 return NULL;
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315
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316 paint_init(&paint->paint, MBP_IMAGE,
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317 paint_image_prepare, paint_image_free);
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318 paint->img = img;
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319 paint->ptn = mbe_pattern_create_image(img);
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320 if(paint->ptn == NULL) {
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321 paint_destroy(&paint->paint);
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322 elmpool_elm_free(rdman->paint_image_pool, paint);
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323 return NULL;
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324 }
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325
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326 return (paint_t *)paint;
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327 }
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328
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329 /*! \brief Setting transformation from user space to image space.
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330 *
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331 * This transformation matrix maps points drawed in user space to
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332 * corresponding points in image space. It is used to resample
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333 * the image to generate pixels of result image.
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334 */
260
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335 void paint_image_set_matrix(paint_t *paint, co_aix matrix[6]) {
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336 paint_image_t *img_paint = (paint_image_t *)paint;
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337
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338 mbe_pattern_set_matrix(img_paint->ptn, matrix);
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339 }
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340
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341 void paint_image_get_size(paint_t *paint, int *w, int *h) {
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342 paint_image_t *ipaint = (paint_image_t *)paint;
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343
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344 ASSERT(paint->pnt_type == MBP_IMAGE);
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345 *w = ipaint->img->w;
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346 *h = ipaint->img->h;
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347 }