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4104 | Serge | 1 | /* |
2 | * Copyright (C) 2011-2013 Intel Corporation |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the next |
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12 | * paragraph) shall be included in all copies or substantial portions of the |
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13 | * Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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21 | * SOFTWARE. |
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22 | */ |
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23 | |||
24 | #include |
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25 | #include |
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26 | #include |
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27 | #include |
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28 | #include |
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29 | |||
30 | /** |
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31 | * drm_rect_intersect - intersect two rectangles |
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32 | * @r1: first rectangle |
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33 | * @r2: second rectangle |
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34 | * |
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35 | * Calculate the intersection of rectangles @r1 and @r2. |
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36 | * @r1 will be overwritten with the intersection. |
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37 | * |
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38 | * RETURNS: |
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39 | * %true if rectangle @r1 is still visible after the operation, |
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40 | * %false otherwise. |
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41 | */ |
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42 | bool drm_rect_intersect(struct drm_rect *r1, const struct drm_rect *r2) |
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43 | { |
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44 | r1->x1 = max(r1->x1, r2->x1); |
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45 | r1->y1 = max(r1->y1, r2->y1); |
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46 | r1->x2 = min(r1->x2, r2->x2); |
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47 | r1->y2 = min(r1->y2, r2->y2); |
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48 | |||
49 | return drm_rect_visible(r1); |
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50 | } |
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51 | EXPORT_SYMBOL(drm_rect_intersect); |
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52 | |||
53 | /** |
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54 | * drm_rect_clip_scaled - perform a scaled clip operation |
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55 | * @src: source window rectangle |
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56 | * @dst: destination window rectangle |
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57 | * @clip: clip rectangle |
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58 | * @hscale: horizontal scaling factor |
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59 | * @vscale: vertical scaling factor |
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60 | * |
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61 | * Clip rectangle @dst by rectangle @clip. Clip rectangle @src by the |
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62 | * same amounts multiplied by @hscale and @vscale. |
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63 | * |
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64 | * RETURNS: |
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65 | * %true if rectangle @dst is still visible after being clipped, |
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66 | * %false otherwise |
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67 | */ |
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68 | bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst, |
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69 | const struct drm_rect *clip, |
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70 | int hscale, int vscale) |
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71 | { |
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72 | int diff; |
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73 | |||
74 | diff = clip->x1 - dst->x1; |
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75 | if (diff > 0) { |
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76 | int64_t tmp = src->x1 + (int64_t) diff * hscale; |
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77 | src->x1 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX); |
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78 | } |
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79 | diff = clip->y1 - dst->y1; |
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80 | if (diff > 0) { |
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81 | int64_t tmp = src->y1 + (int64_t) diff * vscale; |
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82 | src->y1 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX); |
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83 | } |
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84 | diff = dst->x2 - clip->x2; |
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85 | if (diff > 0) { |
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86 | int64_t tmp = src->x2 - (int64_t) diff * hscale; |
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87 | src->x2 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX); |
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88 | } |
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89 | diff = dst->y2 - clip->y2; |
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90 | if (diff > 0) { |
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91 | int64_t tmp = src->y2 - (int64_t) diff * vscale; |
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92 | src->y2 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX); |
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93 | } |
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94 | |||
95 | return drm_rect_intersect(dst, clip); |
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96 | } |
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97 | EXPORT_SYMBOL(drm_rect_clip_scaled); |
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98 | |||
99 | static int drm_calc_scale(int src, int dst) |
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100 | { |
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101 | int scale = 0; |
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102 | |||
103 | if (src < 0 || dst < 0) |
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104 | return -EINVAL; |
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105 | |||
106 | if (dst == 0) |
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107 | return 0; |
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108 | |||
109 | scale = src / dst; |
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110 | |||
111 | return scale; |
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112 | } |
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113 | |||
114 | /** |
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115 | * drm_rect_calc_hscale - calculate the horizontal scaling factor |
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116 | * @src: source window rectangle |
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117 | * @dst: destination window rectangle |
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118 | * @min_hscale: minimum allowed horizontal scaling factor |
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119 | * @max_hscale: maximum allowed horizontal scaling factor |
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120 | * |
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121 | * Calculate the horizontal scaling factor as |
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122 | * (@src width) / (@dst width). |
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123 | * |
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124 | * RETURNS: |
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125 | * The horizontal scaling factor, or errno of out of limits. |
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126 | */ |
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127 | int drm_rect_calc_hscale(const struct drm_rect *src, |
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128 | const struct drm_rect *dst, |
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129 | int min_hscale, int max_hscale) |
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130 | { |
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131 | int src_w = drm_rect_width(src); |
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132 | int dst_w = drm_rect_width(dst); |
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133 | int hscale = drm_calc_scale(src_w, dst_w); |
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134 | |||
135 | if (hscale < 0 || dst_w == 0) |
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136 | return hscale; |
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137 | |||
138 | if (hscale < min_hscale || hscale > max_hscale) |
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139 | return -ERANGE; |
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140 | |||
141 | return hscale; |
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142 | } |
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143 | EXPORT_SYMBOL(drm_rect_calc_hscale); |
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144 | |||
145 | /** |
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146 | * drm_rect_calc_vscale - calculate the vertical scaling factor |
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147 | * @src: source window rectangle |
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148 | * @dst: destination window rectangle |
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149 | * @min_vscale: minimum allowed vertical scaling factor |
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150 | * @max_vscale: maximum allowed vertical scaling factor |
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151 | * |
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152 | * Calculate the vertical scaling factor as |
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153 | * (@src height) / (@dst height). |
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154 | * |
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155 | * RETURNS: |
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156 | * The vertical scaling factor, or errno of out of limits. |
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157 | */ |
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158 | int drm_rect_calc_vscale(const struct drm_rect *src, |
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159 | const struct drm_rect *dst, |
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160 | int min_vscale, int max_vscale) |
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161 | { |
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162 | int src_h = drm_rect_height(src); |
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163 | int dst_h = drm_rect_height(dst); |
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164 | int vscale = drm_calc_scale(src_h, dst_h); |
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165 | |||
166 | if (vscale < 0 || dst_h == 0) |
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167 | return vscale; |
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168 | |||
169 | if (vscale < min_vscale || vscale > max_vscale) |
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170 | return -ERANGE; |
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171 | |||
172 | return vscale; |
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173 | } |
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174 | EXPORT_SYMBOL(drm_rect_calc_vscale); |
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175 | |||
176 | /** |
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177 | * drm_calc_hscale_relaxed - calculate the horizontal scaling factor |
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178 | * @src: source window rectangle |
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179 | * @dst: destination window rectangle |
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180 | * @min_hscale: minimum allowed horizontal scaling factor |
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181 | * @max_hscale: maximum allowed horizontal scaling factor |
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182 | * |
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183 | * Calculate the horizontal scaling factor as |
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184 | * (@src width) / (@dst width). |
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185 | * |
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186 | * If the calculated scaling factor is below @min_vscale, |
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187 | * decrease the height of rectangle @dst to compensate. |
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188 | * |
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189 | * If the calculated scaling factor is above @max_vscale, |
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190 | * decrease the height of rectangle @src to compensate. |
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191 | * |
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192 | * RETURNS: |
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193 | * The horizontal scaling factor. |
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194 | */ |
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195 | int drm_rect_calc_hscale_relaxed(struct drm_rect *src, |
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196 | struct drm_rect *dst, |
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197 | int min_hscale, int max_hscale) |
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198 | { |
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199 | int src_w = drm_rect_width(src); |
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200 | int dst_w = drm_rect_width(dst); |
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201 | int hscale = drm_calc_scale(src_w, dst_w); |
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202 | |||
203 | if (hscale < 0 || dst_w == 0) |
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204 | return hscale; |
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205 | |||
206 | if (hscale < min_hscale) { |
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207 | int max_dst_w = src_w / min_hscale; |
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208 | |||
209 | drm_rect_adjust_size(dst, max_dst_w - dst_w, 0); |
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210 | |||
211 | return min_hscale; |
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212 | } |
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213 | |||
214 | if (hscale > max_hscale) { |
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215 | int max_src_w = dst_w * max_hscale; |
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216 | |||
217 | drm_rect_adjust_size(src, max_src_w - src_w, 0); |
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218 | |||
219 | return max_hscale; |
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220 | } |
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221 | |||
222 | return hscale; |
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223 | } |
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224 | EXPORT_SYMBOL(drm_rect_calc_hscale_relaxed); |
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225 | |||
226 | /** |
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227 | * drm_rect_calc_vscale_relaxed - calculate the vertical scaling factor |
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228 | * @src: source window rectangle |
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229 | * @dst: destination window rectangle |
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230 | * @min_vscale: minimum allowed vertical scaling factor |
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231 | * @max_vscale: maximum allowed vertical scaling factor |
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232 | * |
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233 | * Calculate the vertical scaling factor as |
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234 | * (@src height) / (@dst height). |
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235 | * |
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236 | * If the calculated scaling factor is below @min_vscale, |
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237 | * decrease the height of rectangle @dst to compensate. |
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238 | * |
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239 | * If the calculated scaling factor is above @max_vscale, |
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240 | * decrease the height of rectangle @src to compensate. |
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241 | * |
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242 | * RETURNS: |
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243 | * The vertical scaling factor. |
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244 | */ |
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245 | int drm_rect_calc_vscale_relaxed(struct drm_rect *src, |
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246 | struct drm_rect *dst, |
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247 | int min_vscale, int max_vscale) |
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248 | { |
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249 | int src_h = drm_rect_height(src); |
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250 | int dst_h = drm_rect_height(dst); |
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251 | int vscale = drm_calc_scale(src_h, dst_h); |
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252 | |||
253 | if (vscale < 0 || dst_h == 0) |
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254 | return vscale; |
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255 | |||
256 | if (vscale < min_vscale) { |
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257 | int max_dst_h = src_h / min_vscale; |
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258 | |||
259 | drm_rect_adjust_size(dst, 0, max_dst_h - dst_h); |
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260 | |||
261 | return min_vscale; |
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262 | } |
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263 | |||
264 | if (vscale > max_vscale) { |
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265 | int max_src_h = dst_h * max_vscale; |
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266 | |||
267 | drm_rect_adjust_size(src, 0, max_src_h - src_h); |
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268 | |||
269 | return max_vscale; |
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270 | } |
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271 | |||
272 | return vscale; |
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273 | } |
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274 | EXPORT_SYMBOL(drm_rect_calc_vscale_relaxed); |
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275 | |||
276 | /** |
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277 | * drm_rect_debug_print - print the rectangle information |
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278 | * @r: rectangle to print |
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279 | * @fixed_point: rectangle is in 16.16 fixed point format |
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280 | */ |
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281 | void drm_rect_debug_print(const struct drm_rect *r, bool fixed_point) |
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282 | { |
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283 | int w = drm_rect_width(r); |
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284 | int h = drm_rect_height(r); |
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285 | |||
286 | if (fixed_point) |
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287 | DRM_DEBUG_KMS("%d.%06ux%d.%06u%+d.%06u%+d.%06u\n", |
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288 | w >> 16, ((w & 0xffff) * 15625) >> 10, |
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289 | h >> 16, ((h & 0xffff) * 15625) >> 10, |
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290 | r->x1 >> 16, ((r->x1 & 0xffff) * 15625) >> 10, |
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291 | r->y1 >> 16, ((r->y1 & 0xffff) * 15625) >> 10); |
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292 | else |
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293 | DRM_DEBUG_KMS("%dx%d%+d%+d\n", w, h, r->x1, r->y1); |
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294 | } |
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295 | EXPORT_SYMBOL(drm_rect_debug_print);>>>>>>>>>> |