Mercurial > MadButterfly

annotate src/paint.c @ 1087:cd34de1a6960 openvg

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Fix issue of incorrect color for color paint. It is always black (nearly). It is caused by translate RGBA values from MadButterfly to OpenVG with wrong function.
author Thinker K.F. Li <thinker@codemud.net>
date Fri, 03 Dec 2010 18:18:43 +0800
parents 555d89e704c0
children c18ad321844d
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
52
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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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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_surface_t *surf;
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diff changeset
278 mbe_pattern_t *ptn;
260
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diff changeset
279 } paint_image_t;
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280
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281 int _paint_image_size = sizeof(paint_image_t);
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282
260
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283 static
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284 void paint_image_prepare(paint_t *paint, mbe_t *cr, shape_t *sh) {
260
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285 paint_image_t *paint_img = (paint_image_t *)paint;
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286 mb_img_data_t *img_data;
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287
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288 img_data = paint_img->img;
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289 mbe_set_source(cr, paint_img->ptn);
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290 }
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291
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292 static
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293 void paint_image_free(redraw_man_t *rdman, paint_t *paint) {
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294 paint_image_t *paint_img = (paint_image_t *)paint;
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295 mb_img_data_t *img_data;
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296
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297 mbe_surface_destroy(paint_img->surf);
260
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298 img_data = paint_img->img;
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299 MB_IMG_DATA_FREE(img_data);
260
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300 paint_destroy(&paint_img->paint);
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301 elmpool_elm_free(rdman->paint_image_pool, paint_img);
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302 }
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303
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304 /*! \brief Create an image painter.
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305 *
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306 * Create a painter that fill/stroke shapes with an image.
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307 *
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308 * \param img is image data return by image load.
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309 * Owner-ship of img is transfered.
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310 */
260
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311 paint_t *rdman_paint_image_new(redraw_man_t *rdman,
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312 mb_img_data_t *img) {
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313 paint_image_t *paint;
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314
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315 paint = elmpool_elm_alloc(rdman->paint_image_pool);
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316 if(paint == NULL)
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317 return NULL;
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318
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319 paint_init(&paint->paint, MBP_IMAGE,
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320 paint_image_prepare, paint_image_free);
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321 paint->img = img;
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322 paint->surf = mbe_image_surface_create_for_data(img->content,
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323 img->fmt,
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324 img->w,
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325 img->h,
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326 img->stride);
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327 if(paint->surf == NULL) {
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328 paint_destroy(&paint->paint);
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329 elmpool_elm_free(rdman->paint_image_pool, paint);
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330 return NULL;
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331 }
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332
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333 paint->ptn = mbe_pattern_create_for_surface(paint->surf);
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334 if(paint->ptn == NULL) {
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335 paint_destroy(&paint->paint);
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336 mbe_surface_destroy(paint->surf);
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337 elmpool_elm_free(rdman->paint_image_pool, paint);
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338 return NULL;
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339 }
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340
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341 return (paint_t *)paint;
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342 }
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343
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344 /*! \brief Setting transformation from user space to image space.
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345 *
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346 * This transformation matrix maps points drawed in user space to
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347 * corresponding points in image space. It is used to resample
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348 * the image to generate pixels of result image.
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349 */
260
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350 void paint_image_set_matrix(paint_t *paint, co_aix matrix[6]) {
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351 paint_image_t *img_paint = (paint_image_t *)paint;
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352
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353 mbe_pattern_set_matrix(img_paint->ptn, matrix);
260
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354 }
356
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355
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356 void paint_image_get_size(paint_t *paint, int *w, int *h) {
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357 paint_image_t *ipaint = (paint_image_t *)paint;
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358
356
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359 ASSERT(paint->pnt_type == MBP_IMAGE);
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360 *w = ipaint->img->w;
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361 *h = ipaint->img->h;
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362 }