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annotate src/paint.c @ 867:4f8d53be9488

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Allocate linear, radial, image paints from elmpools
author Thinker K.F. Li <thinker@codemud.net>
date Thu, 23 Sep 2010 10:43:56 +0800
parents 586e50f82c1f
children f41ac71266bc
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) {
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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
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82 redraw_man_t *rdman; /*!< \brief Used by paint_linear_free(). */
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83 } paint_linear_t;
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84
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85 #define LIF_DIRTY 0x1
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86
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87 int _paint_linear_size = sizeof(paint_linear_t);
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88
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89 static void paint_linear_prepare(paint_t *paint, mbe_t *cr) {
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90 paint_linear_t *linear = (paint_linear_t *)paint;
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91 mbe_pattern_t *ptn;
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92
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93 ptn = linear->ptn;
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94 if(linear->flags & LIF_DIRTY) {
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95 if(ptn)
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96 mbe_pattern_destroy(ptn);
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97 linear->flags &= ~LIF_DIRTY;
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98 ptn = mbe_pattern_create_linear(linear->x1, linear->y1,
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99 linear->x2, linear->y2,
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100 linear->stops, linear->n_stops);
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101 ASSERT(ptn != NULL);
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102 linear->ptn = ptn;
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103 }
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104
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105 mbe_set_source(cr, ptn);
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106 }
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107
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108 static void paint_linear_free(redraw_man_t *rdman, paint_t *paint) {
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109 paint_linear_t *linear = (paint_linear_t *)paint;
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110
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111 if(linear->ptn)
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112 mbe_pattern_destroy(linear->ptn);
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113 paint_destroy(paint);
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114 elmpool_elm_free(linear->rdman->paint_linear_pool, linear);
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115 }
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116
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117 paint_t *rdman_paint_linear_new(redraw_man_t *rdman,
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118 co_aix x1, co_aix y1,
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119 co_aix x2, co_aix y2) {
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120 paint_linear_t *linear;
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121
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122 linear = (paint_linear_t *)elmpool_elm_alloc(rdman->paint_linear_pool);
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123 if(linear == NULL)
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124 return NULL;
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125
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126 paint_init(&linear->paint, MBP_LINEAR,
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127 paint_linear_prepare, paint_linear_free);
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128
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129 linear->x1 = x1;
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130 linear->y1 = y1;
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131 linear->x2 = x2;
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132 linear->y2 = y2;
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133 linear->n_stops = 0;
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134 linear->stops = NULL;
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135 linear->flags = LIF_DIRTY;
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136 linear->ptn = NULL;
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137 linear->rdman = rdman;
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138
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139 return (paint_t *)linear;
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140 }
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141
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142 /*! \brief Setup color stop for a linear radient paint.
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143 *
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144 * stops should be managed by users of the function. It should be
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145 * available before the paint being freed or changed to another
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146 * array of stops.
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147 */
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148 grad_stop_t *paint_linear_stops(paint_t *paint,
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149 int n_stops,
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150 grad_stop_t *stops) {
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151 paint_linear_t *linear = (paint_linear_t *)paint;
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152 grad_stop_t *old_stops;
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153
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154 old_stops = linear->stops;
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155 linear->n_stops = n_stops;
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156 linear->stops = stops;
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157 linear->flags |= LIF_DIRTY;
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158
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159 return old_stops;
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160 }
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161
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162 /*! \brief Radial gradient.
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163 *
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164 * NOTE: The only supported gradient unit is userSpaceOnUse.
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165 */
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166 typedef struct _paint_radial {
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167 paint_t paint;
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168 co_aix cx, cy;
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169 co_aix r;
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170 int n_stops;
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171 grad_stop_t *stops;
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172 int flags;
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173 mbe_pattern_t *ptn;
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174
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175 redraw_man_t *rdman; /*!< \brief Used by paint_radial_free() */
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176 } paint_radial_t;
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177
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178 #define RDF_DIRTY 0x1
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179
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180 int _paint_radial_size = sizeof(paint_radial_t);
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181
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182 static void paint_radial_prepare(paint_t *paint, mbe_t *cr) {
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183 paint_radial_t *radial = (paint_radial_t *)paint;
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184 mbe_pattern_t *ptn;
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185
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186 if(radial->flags & RDF_DIRTY) {
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187 ptn = mbe_pattern_create_radial(radial->cx, radial->cy, 0,
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188 radial->cx, radial->cy,
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189 radial->r,
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190 radial->stops,
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191 radial->n_stops);
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192 ASSERT(ptn != NULL);
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193 mbe_pattern_destroy(radial->ptn);
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194 radial->ptn = ptn;
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195 }
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196 mbe_set_source(cr, radial->ptn);
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197 }
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198
159
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199 static void paint_radial_free(redraw_man_t *rdman, paint_t *paint) {
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200 paint_radial_t *radial = (paint_radial_t *)paint;
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201
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202 if(radial->ptn)
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203 mbe_pattern_destroy(radial->ptn);
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204 paint_destroy(paint);
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205 elmpool_elm_free(radial->rdman->paint_radial_pool, radial);
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206 }
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207
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208 paint_t *rdman_paint_radial_new(redraw_man_t *rdman,
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209 co_aix cx, co_aix cy, co_aix r) {
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210 paint_radial_t *radial;
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211
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212 radial = elmpool_elm_alloc(rdman->paint_radial_pool);
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213 if(radial == NULL)
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214 return NULL;
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215
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216 paint_init(&radial->paint, MBP_RADIAL,
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217 paint_radial_prepare, paint_radial_free);
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218 radial->cx = cx;
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219 radial->cy = cy;
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220 radial->r = r;
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221 radial->n_stops = 0;
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222 radial->stops = NULL;
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223 radial->flags = RDF_DIRTY;
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224 radial->ptn = NULL;
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225 radial->rdman = rdman;
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226
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227 return (paint_t *)radial;
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228 }
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229
58
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230 /*! \brief Setup color stop for a radial radient paint.
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231 *
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232 * stops should be managed by users of the function. It should be
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233 * available before the paint being freed or changed to another
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234 * array of stops.
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235 */
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236 grad_stop_t *paint_radial_stops(paint_t *paint,
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237 int n_stops,
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238 grad_stop_t *stops) {
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239 paint_radial_t *radial = (paint_radial_t *)paint;
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240 grad_stop_t *old_stops;
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241
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242 old_stops = radial->stops;
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243 radial->n_stops = n_stops;
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244 radial->stops = stops;
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245 radial->flags |= RDF_DIRTY;
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246
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247 return old_stops;
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248 }
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249
260
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250
265
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251 /*! \brief Using an image as a paint.
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252 *
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253 * This type of paints fill/stroke shapes with an image.
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254 */
260
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255 typedef struct _paint_image {
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256 paint_t paint;
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257 mb_img_data_t *img;
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258 mbe_surface_t *surf;
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259 mbe_pattern_t *ptn;
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260
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261 redraw_man_t *rdman; /*!< \brief Used by paint_image_free() */
260
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262 } paint_image_t;
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263
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264 int _paint_image_size = sizeof(paint_image_t);
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265
260
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diff changeset
266 static
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267 void paint_image_prepare(paint_t *paint, mbe_t *cr) {
260
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268 paint_image_t *paint_img = (paint_image_t *)paint;
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diff changeset
269 mb_img_data_t *img_data;
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diff changeset
270
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271 img_data = paint_img->img;
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272 mbe_set_source(cr, paint_img->ptn);
260
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273 }
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274
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diff changeset
275 static
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diff changeset
276 void paint_image_free(redraw_man_t *rdman, paint_t *paint) {
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277 paint_image_t *paint_img = (paint_image_t *)paint;
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278 mb_img_data_t *img_data;
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279
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280 mbe_surface_destroy(paint_img->surf);
260
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281 img_data = paint_img->img;
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282 MB_IMG_DATA_FREE(img_data);
260
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283 paint_destroy(&paint_img->paint);
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284 elmpool_elm_free(paint_img->rdman->paint_image_pool, paint_img);
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285 }
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286
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287 /*! \brief Create an image painter.
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288 *
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289 * Create a painter that fill/stroke shapes with an image.
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290 *
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291 * \param img is image data return by image load.
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292 * Owner-ship of img is transfered.
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293 */
260
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294 paint_t *rdman_paint_image_new(redraw_man_t *rdman,
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295 mb_img_data_t *img) {
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296 paint_image_t *paint;
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297
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298 paint = elmpool_elm_alloc(rdman->paint_image_pool);
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299 if(paint == NULL)
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300 return NULL;
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301
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302 paint_init(&paint->paint, MBP_IMAGE,
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303 paint_image_prepare, paint_image_free);
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304 paint->img = img;
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305 paint->rdman = rdman;
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306 paint->surf = mbe_image_surface_create_for_data(img->content,
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307 img->fmt,
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308 img->w,
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309 img->h,
260
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310 img->stride);
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311 if(paint->surf == NULL) {
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312 paint_destroy(&paint->paint);
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313 elmpool_elm_free(rdman->paint_image_pool, paint);
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314 return NULL;
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315 }
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316
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317 paint->ptn = mbe_pattern_create_for_surface(paint->surf);
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318 if(paint->ptn == NULL) {
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319 paint_destroy(&paint->paint);
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320 mbe_surface_destroy(paint->surf);
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321 elmpool_elm_free(rdman->paint_image_pool, paint);
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322 return NULL;
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323 }
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324
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325 return (paint_t *)paint;
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326 }
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327
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328 /*! \brief Setting transformation from user space to image space.
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329 *
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330 * This transformation matrix maps points drawed in user space to
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331 * corresponding points in image space. It is used to resample
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332 * the image to generate pixels of result image.
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333 */
260
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334 void paint_image_set_matrix(paint_t *paint, co_aix matrix[6]) {
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335 paint_image_t *img_paint = (paint_image_t *)paint;
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336
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337 mbe_pattern_set_matrix(img_paint->ptn, matrix);
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338 }
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339
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340 void paint_image_get_size(paint_t *paint, int *w, int *h) {
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341 paint_image_t *ipaint = (paint_image_t *)paint;
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342
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343 ASSERT(paint->pnt_type == MBP_IMAGE);
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344 *w = ipaint->img->w;
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345 *h = ipaint->img->h;
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346 }