Mercurial > MadButterfly

annotate src/paint.c @ 365:6adb28388132

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Add capability to add new scene and source into the project Add Save button to save the project.
author wycc
date Sat, 14 Mar 2009 16:42:37 +0800
parents 3e84458968ec
children 16116d84bc5e
rev   line source
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diff changeset
1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <cairo.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, cairo_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 cairo_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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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 cairo_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, cairo_t *cr) {
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84 paint_linear_t *linear = (paint_linear_t *)paint;
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85 cairo_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 cairo_pattern_destroy(ptn);
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93 linear->flags &= ~LIF_DIRTY;
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94 ptn = cairo_pattern_create_linear(linear->x1, linear->y1,
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95 linear->x2, linear->y2);
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96 for(i = 0; i < linear->n_stops; i++) {
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97 stop = &linear->stops[i];
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98 cairo_pattern_add_color_stop_rgba(ptn, stop->offset,
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99 stop->r, stop->g, stop->b,
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100 stop->a);
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101 }
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102 linear->ptn = ptn;
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103 }
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104
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105 cairo_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 cairo_pattern_destroy(linear->ptn);
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113 paint_destroy(paint);
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114 free(paint);
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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 *)malloc(sizeof(paint_linear_t));
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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
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138 return (paint_t *)linear;
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139 }
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140
58
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141 /*! \brief Setup color stop for a linear radient paint.
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142 *
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143 * stops should be managed by users of the function. It should be
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144 * available before the paint being freed or changed to another
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145 * array of stops.
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146 */
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147 grad_stop_t *paint_linear_stops(paint_t *paint,
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148 int n_stops,
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149 grad_stop_t *stops) {
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150 paint_linear_t *linear = (paint_linear_t *)paint;
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151 grad_stop_t *old_stops;
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152
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153 old_stops = linear->stops;
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154 linear->n_stops = n_stops;
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155 linear->stops = stops;
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156 linear->flags |= LIF_DIRTY;
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157
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158 return old_stops;
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159 }
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160
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161 /*! \brief Radial gradient.
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162 *
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163 * NOTE: The only supported gradient unit is userSpaceOnUse.
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164 */
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165 typedef struct _paint_radial {
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166 paint_t paint;
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167 co_aix cx, cy;
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168 co_aix r;
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169 int n_stops;
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170 grad_stop_t *stops;
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171 int flags;
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172 cairo_pattern_t *ptn;
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173 } paint_radial_t;
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174
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175 #define RDF_DIRTY 0x1
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176
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177 static void paint_radial_prepare(paint_t *paint, cairo_t *cr) {
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178 paint_radial_t *radial = (paint_radial_t *)paint;
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179 cairo_pattern_t *ptn;
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180 grad_stop_t *stop;
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181 int i;
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182
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183 if(radial->flags & RDF_DIRTY) {
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184 ptn = cairo_pattern_create_radial(radial->cx, radial->cy, 0,
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185 radial->cx, radial->cy,
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186 radial->r);
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187 ASSERT(ptn != NULL);
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188 stop = radial->stops;
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189 for(i = 0; i < radial->n_stops; i++, stop++) {
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190 cairo_pattern_add_color_stop_rgba(ptn, stop->offset,
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191 stop->r, stop->g,
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192 stop->b, stop->a);
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193 }
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194 cairo_pattern_destroy(radial->ptn);
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195 radial->ptn = ptn;
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196 }
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197 cairo_set_source(cr, radial->ptn);
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198 }
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199
159
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200 static void paint_radial_free(redraw_man_t *rdman, paint_t *paint) {
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201 paint_radial_t *radial = (paint_radial_t *)paint;
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202
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203 if(radial->ptn)
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204 cairo_pattern_destroy(radial->ptn);
260
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205 paint_destroy(paint);
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206 free(paint);
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207 }
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208
159
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209 paint_t *rdman_paint_radial_new(redraw_man_t *rdman,
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210 co_aix cx, co_aix cy, co_aix r) {
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211 paint_radial_t *radial;
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212
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213 radial = O_ALLOC(paint_radial_t);
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214 if(radial == NULL)
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215 return NULL;
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216
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217 paint_init(&radial->paint, MBP_RADIAL,
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218 paint_radial_prepare, paint_radial_free);
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219 radial->cx = cx;
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220 radial->cy = cy;
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221 radial->r = r;
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222 radial->n_stops = 0;
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223 radial->stops = NULL;
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224 radial->flags = RDF_DIRTY;
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225 radial->ptn = NULL;
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226
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227 return (paint_t *)radial;
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228 }
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229
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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 cairo_surface_t *surf;
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259 cairo_pattern_t *ptn;
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260 } paint_image_t;
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261
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262 static
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263 void paint_image_prepare(paint_t *paint, cairo_t *cr) {
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264 paint_image_t *paint_img = (paint_image_t *)paint;
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265 mb_img_data_t *img_data;
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266
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267 img_data = paint_img->img;
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268 cairo_set_source(cr, paint_img->ptn);
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269 }
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270
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271 static
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272 void paint_image_free(redraw_man_t *rdman, paint_t *paint) {
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273 paint_image_t *paint_img = (paint_image_t *)paint;
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274 mb_img_data_t *img_data;
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diff changeset
275
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276 cairo_surface_destroy(paint_img->surf);
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277 img_data = paint_img->img;
356
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278 MB_IMG_DATA_FREE(img_data);
260
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diff changeset
279 paint_destroy(&paint_img->paint);
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280 free(paint);
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281 }
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282
265
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283 /*! \brief Create an image painter.
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284 *
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285 * Create a painter that fill/stroke shapes with an image.
348
04d22dc38bc0 Change declaration of sh_image_set_img_data().
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diff changeset
286 *
356
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287 * \param img is image data return by image load.
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288 * Owner-ship of img is transfered.
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289 */
260
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290 paint_t *rdman_paint_image_new(redraw_man_t *rdman,
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291 mb_img_data_t *img) {
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292 paint_image_t *paint;
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293 int fmt;
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294
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295 switch(img->fmt) {
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296 case MB_IFMT_ARGB32:
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297 fmt = CAIRO_FORMAT_ARGB32;
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298 break;
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299 case MB_IFMT_RGB24:
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300 fmt = CAIRO_FORMAT_RGB24;
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301 break;
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302 case MB_IFMT_A8:
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303 fmt = CAIRO_FORMAT_A8;
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304 break;
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305 case MB_IFMT_A1:
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306 fmt = CAIRO_FORMAT_A1;
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307 break;
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308 default:
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309 return NULL;
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310 }
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311
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312 paint = O_ALLOC(paint_image_t);
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313 if(paint == NULL)
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314 return NULL;
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315
356
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316 paint_init(&paint->paint, MBP_IMAGE,
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317 paint_image_prepare, paint_image_free);
260
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318 paint->img = img;
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319 paint->surf = cairo_image_surface_create_for_data(img->content,
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320 fmt,
268
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321 img->w,
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322 img->h,
260
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323 img->stride);
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324 if(paint->surf == NULL) {
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325 paint_destroy(&paint->paint);
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326 free(paint);
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327 return NULL;
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328 }
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329
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330 paint->ptn = cairo_pattern_create_for_surface(paint->surf);
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331 if(paint->ptn == NULL) {
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332 paint_destroy(&paint->paint);
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333 cairo_surface_destroy(paint->surf);
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334 free(paint);
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335 return NULL;
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336 }
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337
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338 return (paint_t *)paint;
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339 }
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340
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341 /*! \brief Setting transformation from user space to image space.
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342 *
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343 * This transformation matrix maps points drawed in user space to
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344 * corresponding points in image space. It is used to resample
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345 * the image to generate pixels of result image.
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346 */
260
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347 void paint_image_set_matrix(paint_t *paint, co_aix matrix[6]) {
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348 paint_image_t *img_paint = (paint_image_t *)paint;
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349 cairo_matrix_t cmatrix;
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350
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351 cmatrix.xx = matrix[0];
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352 cmatrix.xy = matrix[1];
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353 cmatrix.x0 = matrix[2];
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354 cmatrix.yx = matrix[3];
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355 cmatrix.yy = matrix[4];
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356 cmatrix.y0 = matrix[5];
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357 cairo_pattern_set_matrix(img_paint->ptn, &cmatrix);
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358 }
356
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359
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360 void paint_image_get_size(paint_t *paint, int *w, int *h) {
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361 paint_image_t *ipaint = (paint_image_t *)paint;
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362
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363 ASSERT(paint->pnt_type == MBP_IMAGE);
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364 *w = ipaint->img->w;
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365 *h = ipaint->img->h;
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366 }