Mercurial > MadButterfly

annotate src/paint.c @ 602:ac2e6468a22a openvg

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Replace mbe_image_surface_create_from_png() with mbe_pattern_create_image()
author Thinker K.F. Li <thinker@branda.to>
date Fri, 02 Jul 2010 13:42:22 +0800
parents e813ac222f48
children 7b4e80ab671a
rev   line source
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include "mb_graph_engine.h"
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4 #include "mb_paint.h"
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5
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6 #define ASSERT(x)
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7
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8 /*! \brief Solid color paint.
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9 */
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10 typedef struct _paint_color {
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11 paint_t paint;
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12 co_comp_t r, g, b, a;
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13 } paint_color_t;
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14
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15 int _paint_color_size = sizeof(paint_color_t);
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16
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17
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18 static void paint_color_prepare(paint_t *paint, mbe_t *cr) {
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19 paint_color_t *color = (paint_color_t *)paint;
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20
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21 mbe_set_source_rgba(cr, color->r, color->g, color->b, color->a);
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22 }
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23
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24 static void paint_color_free(redraw_man_t *rdman, paint_t *paint) {
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25 shnode_list_free(rdman, paint->members);
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26 paint_destroy(paint);
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27 elmpool_elm_free(rdman->paint_color_pool, paint);
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28 }
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29
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30 paint_t *rdman_paint_color_new(redraw_man_t *rdman,
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31 co_comp_t r, co_comp_t g,
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32 co_comp_t b, co_comp_t a) {
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33 paint_color_t *color;
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34
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35 color = (paint_color_t *)elmpool_elm_alloc(rdman->paint_color_pool);
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36 if(color == NULL)
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37 return NULL;
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38 color->r = r;
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39 color->g = g;
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40 color->b = b;
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41 color->a = a;
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42 paint_init(&color->paint, MBP_COLOR,
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43 paint_color_prepare, paint_color_free);
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44 return (paint_t *)color;
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45 }
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46
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47 void paint_color_set(paint_t *paint,
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48 co_comp_t r, co_comp_t g,
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49 co_comp_t b, co_comp_t a) {
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50 paint_color_t *color = (paint_color_t *)paint;
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51
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52 color->r = r;
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53 color->g = g;
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54 color->b = b;
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55 color->a = a;
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56 }
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57
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58 void paint_color_get(paint_t *paint,
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59 co_comp_t *r, co_comp_t *g,
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60 co_comp_t *b, co_comp_t *a) {
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61 paint_color_t *color = (paint_color_t *)paint;
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62
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63 *r = color->r;
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64 *g = color->g;
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65 *b = color->b;
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66 *a = color->a;
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67 }
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68
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69 /*! \brief Linear gradient.
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70 */
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71 typedef struct _paint_linear {
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72 paint_t paint;
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73 co_aix x1, y1;
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74 co_aix x2, y2;
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75 int n_stops;
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76 grad_stop_t *stops;
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77 int flags;
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78 mbe_pattern_t *ptn;
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79 } paint_linear_t;
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80
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81 #define LIF_DIRTY 0x1
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82
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83 static void paint_linear_prepare(paint_t *paint, mbe_t *cr) {
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84 paint_linear_t *linear = (paint_linear_t *)paint;
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85 mbe_pattern_t *ptn;
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86 grad_stop_t *stop;
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87 int i;
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88
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89 ptn = linear->ptn;
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90 if(linear->flags & LIF_DIRTY) {
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91 if(ptn)
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92 mbe_pattern_destroy(ptn);
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93 linear->flags &= ~LIF_DIRTY;
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94 ptn = mbe_pattern_create_linear(linear->x1, linear->y1,
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95 linear->x2, linear->y2,
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96 linear->stops, linear->n_stops);
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97 ASSERT(ptn != NULL);
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98 linear->ptn = ptn;
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99 }
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100
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101 mbe_set_source(cr, ptn);
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102 }
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103
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104 static void paint_linear_free(redraw_man_t *rdman, paint_t *paint) {
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105 paint_linear_t *linear = (paint_linear_t *)paint;
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106
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107 if(linear->ptn)
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108 mbe_pattern_destroy(linear->ptn);
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109 paint_destroy(paint);
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110 free(paint);
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111 }
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112
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113 paint_t *rdman_paint_linear_new(redraw_man_t *rdman,
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114 co_aix x1, co_aix y1,
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115 co_aix x2, co_aix y2) {
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116 paint_linear_t *linear;
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117
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118 linear = (paint_linear_t *)malloc(sizeof(paint_linear_t));
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119 if(linear == NULL)
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120 return NULL;
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121
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122 paint_init(&linear->paint, MBP_LINEAR,
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123 paint_linear_prepare, paint_linear_free);
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124
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125 linear->x1 = x1;
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126 linear->y1 = y1;
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127 linear->x2 = x2;
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128 linear->y2 = y2;
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129 linear->n_stops = 0;
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130 linear->stops = NULL;
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131 linear->flags = LIF_DIRTY;
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132 linear->ptn = NULL;
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133
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134 return (paint_t *)linear;
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135 }
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136
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137 /*! \brief Setup color stop for a linear radient paint.
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138 *
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139 * stops should be managed by users of the function. It should be
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140 * available before the paint being freed or changed to another
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141 * array of stops.
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142 */
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143 grad_stop_t *paint_linear_stops(paint_t *paint,
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144 int n_stops,
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145 grad_stop_t *stops) {
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146 paint_linear_t *linear = (paint_linear_t *)paint;
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147 grad_stop_t *old_stops;
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148
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149 old_stops = linear->stops;
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150 linear->n_stops = n_stops;
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151 linear->stops = stops;
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152 linear->flags |= LIF_DIRTY;
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153
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154 return old_stops;
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155 }
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156
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157 /*! \brief Radial gradient.
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158 *
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159 * NOTE: The only supported gradient unit is userSpaceOnUse.
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160 */
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161 typedef struct _paint_radial {
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162 paint_t paint;
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163 co_aix cx, cy;
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164 co_aix r;
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165 int n_stops;
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166 grad_stop_t *stops;
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167 int flags;
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168 mbe_pattern_t *ptn;
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169 } paint_radial_t;
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170
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171 #define RDF_DIRTY 0x1
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172
448
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173 static void paint_radial_prepare(paint_t *paint, mbe_t *cr) {
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174 paint_radial_t *radial = (paint_radial_t *)paint;
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175 mbe_pattern_t *ptn;
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176 int i;
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177
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178 if(radial->flags & RDF_DIRTY) {
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179 ptn = mbe_pattern_create_radial(radial->cx, radial->cy, 0,
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180 radial->cx, radial->cy,
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181 radial->r,
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182 radial->stops,
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183 radial->n_stops);
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184 ASSERT(ptn != NULL);
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185 mbe_pattern_destroy(radial->ptn);
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186 radial->ptn = ptn;
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187 }
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188 mbe_set_source(cr, radial->ptn);
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189 }
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190
159
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191 static void paint_radial_free(redraw_man_t *rdman, paint_t *paint) {
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192 paint_radial_t *radial = (paint_radial_t *)paint;
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193
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194 if(radial->ptn)
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195 mbe_pattern_destroy(radial->ptn);
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196 paint_destroy(paint);
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197 free(paint);
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198 }
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199
159
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200 paint_t *rdman_paint_radial_new(redraw_man_t *rdman,
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201 co_aix cx, co_aix cy, co_aix r) {
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202 paint_radial_t *radial;
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203
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204 radial = O_ALLOC(paint_radial_t);
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205 if(radial == NULL)
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206 return NULL;
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207
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208 paint_init(&radial->paint, MBP_RADIAL,
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209 paint_radial_prepare, paint_radial_free);
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210 radial->cx = cx;
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211 radial->cy = cy;
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212 radial->r = r;
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213 radial->n_stops = 0;
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214 radial->stops = NULL;
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215 radial->flags = RDF_DIRTY;
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216 radial->ptn = NULL;
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217
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218 return (paint_t *)radial;
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219 }
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220
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221 /*! \brief Setup color stop for a radial radient paint.
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222 *
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223 * stops should be managed by users of the function. It should be
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224 * available before the paint being freed or changed to another
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225 * array of stops.
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226 */
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227 grad_stop_t *paint_radial_stops(paint_t *paint,
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228 int n_stops,
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229 grad_stop_t *stops) {
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230 paint_radial_t *radial = (paint_radial_t *)paint;
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231 grad_stop_t *old_stops;
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232
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233 old_stops = radial->stops;
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234 radial->n_stops = n_stops;
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235 radial->stops = stops;
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236 radial->flags |= RDF_DIRTY;
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237
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238 return old_stops;
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239 }
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240
260
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241
265
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242 /*! \brief Using an image as a paint.
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243 *
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244 * This type of paints fill/stroke shapes with an image.
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245 */
260
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246 typedef struct _paint_image {
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247 paint_t paint;
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248 mb_img_data_t *img;
448
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249 mbe_pattern_t *ptn;
260
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250 } paint_image_t;
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251
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252 static
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253 void paint_image_prepare(paint_t *paint, mbe_t *cr) {
260
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254 paint_image_t *paint_img = (paint_image_t *)paint;
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255 mb_img_data_t *img_data;
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256
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257 img_data = paint_img->img;
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258 mbe_set_source(cr, paint_img->ptn);
260
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259 }
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260
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261 static
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262 void paint_image_free(redraw_man_t *rdman, paint_t *paint) {
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263 paint_image_t *paint_img = (paint_image_t *)paint;
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264 mb_img_data_t *img_data;
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265
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266 img_data = paint_img->img;
356
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267 MB_IMG_DATA_FREE(img_data);
260
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268 paint_destroy(&paint_img->paint);
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269 free(paint);
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270 }
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271
265
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272 /*! \brief Create an image painter.
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273 *
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274 * Create a painter that fill/stroke shapes with an image.
348
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275 *
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276 * \param img is image data return by image load.
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277 * Owner-ship of img is transfered.
265
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278 */
260
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diff changeset
279 paint_t *rdman_paint_image_new(redraw_man_t *rdman,
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280 mb_img_data_t *img) {
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281 paint_image_t *paint;
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282
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283 paint = O_ALLOC(paint_image_t);
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284 if(paint == NULL)
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285 return NULL;
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286
356
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287 paint_init(&paint->paint, MBP_IMAGE,
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288 paint_image_prepare, paint_image_free);
260
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289 paint->img = img;
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290
602
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291 paint->ptn = mbe_pattern_create_image(img);
260
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292 if(paint->ptn == NULL) {
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293 paint_destroy(&paint->paint);
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294 free(paint);
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295 return NULL;
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296 }
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297
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298 return (paint_t *)paint;
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299 }
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300
265
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301 /*! \brief Setting transformation from user space to image space.
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302 *
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303 * This transformation matrix maps points drawed in user space to
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304 * corresponding points in image space. It is used to resample
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305 * the image to generate pixels of result image.
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306 */
260
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307 void paint_image_set_matrix(paint_t *paint, co_aix matrix[6]) {
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308 paint_image_t *img_paint = (paint_image_t *)paint;
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309
473
ba64f928542b Remove mbe_matrix_t type.
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310 mbe_pattern_set_matrix(img_paint->ptn, matrix);
260
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311 }
356
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312
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313 void paint_image_get_size(paint_t *paint, int *w, int *h) {
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314 paint_image_t *ipaint = (paint_image_t *)paint;
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315
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316 ASSERT(paint->pnt_type == MBP_IMAGE);
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317 *w = ipaint->img->w;
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318 *h = ipaint->img->h;
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319 }