1 /** 2 * @file lv_img_buf.h 3 * 4 */ 5 6 #ifndef LV_IMG_BUF_H 7 #define LV_IMG_BUF_H 8 9 #ifdef __cplusplus 10 extern "C" { 11 #endif 12 13 /********************* 14 * INCLUDES 15 *********************/ 16 #include <stdbool.h> 17 #include "../misc/lv_color.h" 18 #include "../misc/lv_area.h" 19 20 /********************* 21 * DEFINES 22 *********************/ 23 /*If image pixels contains alpha we need to know how much byte is a pixel*/ 24 #if LV_COLOR_DEPTH == 1 || LV_COLOR_DEPTH == 8 25 #define LV_IMG_PX_SIZE_ALPHA_BYTE 2 26 #elif LV_COLOR_DEPTH == 16 27 #define LV_IMG_PX_SIZE_ALPHA_BYTE 3 28 #elif LV_COLOR_DEPTH == 32 29 #define LV_IMG_PX_SIZE_ALPHA_BYTE 4 30 #endif 31 32 #define LV_IMG_BUF_SIZE_TRUE_COLOR(w, h) ((LV_COLOR_SIZE / 8) * w * h) 33 #define LV_IMG_BUF_SIZE_TRUE_COLOR_CHROMA_KEYED(w, h) ((LV_COLOR_SIZE / 8) * w * h) 34 #define LV_IMG_BUF_SIZE_TRUE_COLOR_ALPHA(w, h) (LV_IMG_PX_SIZE_ALPHA_BYTE * w * h) 35 36 /*+ 1: to be sure no fractional row*/ 37 #define LV_IMG_BUF_SIZE_ALPHA_1BIT(w, h) ((((w / 8) + 1) * h)) 38 #define LV_IMG_BUF_SIZE_ALPHA_2BIT(w, h) ((((w / 4) + 1) * h)) 39 #define LV_IMG_BUF_SIZE_ALPHA_4BIT(w, h) ((((w / 2) + 1) * h)) 40 #define LV_IMG_BUF_SIZE_ALPHA_8BIT(w, h) ((w * h)) 41 42 /*4 * X: for palette*/ 43 #define LV_IMG_BUF_SIZE_INDEXED_1BIT(w, h) (LV_IMG_BUF_SIZE_ALPHA_1BIT(w, h) + 4 * 2) 44 #define LV_IMG_BUF_SIZE_INDEXED_2BIT(w, h) (LV_IMG_BUF_SIZE_ALPHA_2BIT(w, h) + 4 * 4) 45 #define LV_IMG_BUF_SIZE_INDEXED_4BIT(w, h) (LV_IMG_BUF_SIZE_ALPHA_4BIT(w, h) + 4 * 16) 46 #define LV_IMG_BUF_SIZE_INDEXED_8BIT(w, h) (LV_IMG_BUF_SIZE_ALPHA_8BIT(w, h) + 4 * 256) 47 48 #define _LV_ZOOM_INV_UPSCALE 5 49 50 /********************** 51 * TYPEDEFS 52 **********************/ 53 54 /*Image color format*/ 55 enum { 56 LV_IMG_CF_UNKNOWN = 0, 57 58 LV_IMG_CF_RAW, /**< Contains the file as it is. Needs custom decoder function*/ 59 LV_IMG_CF_RAW_ALPHA, /**< Contains the file as it is. The image has alpha. Needs custom decoder 60 function*/ 61 LV_IMG_CF_RAW_CHROMA_KEYED, /**< Contains the file as it is. The image is chroma keyed. Needs 62 custom decoder function*/ 63 64 LV_IMG_CF_TRUE_COLOR, /**< Color format and depth should match with LV_COLOR settings*/ 65 LV_IMG_CF_TRUE_COLOR_ALPHA, /**< Same as `LV_IMG_CF_TRUE_COLOR` but every pixel has an alpha byte*/ 66 LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED, /**< Same as `LV_IMG_CF_TRUE_COLOR` but LV_COLOR_TRANSP pixels 67 will be transparent*/ 68 69 LV_IMG_CF_INDEXED_1BIT, /**< Can have 2 different colors in a palette (can't be chroma keyed)*/ 70 LV_IMG_CF_INDEXED_2BIT, /**< Can have 4 different colors in a palette (can't be chroma keyed)*/ 71 LV_IMG_CF_INDEXED_4BIT, /**< Can have 16 different colors in a palette (can't be chroma keyed)*/ 72 LV_IMG_CF_INDEXED_8BIT, /**< Can have 256 different colors in a palette (can't be chroma keyed)*/ 73 74 LV_IMG_CF_ALPHA_1BIT, /**< Can have one color and it can be drawn or not*/ 75 LV_IMG_CF_ALPHA_2BIT, /**< Can have one color but 4 different alpha value*/ 76 LV_IMG_CF_ALPHA_4BIT, /**< Can have one color but 16 different alpha value*/ 77 LV_IMG_CF_ALPHA_8BIT, /**< Can have one color but 256 different alpha value*/ 78 79 LV_IMG_CF_RGB888, 80 LV_IMG_CF_RGBA8888, 81 LV_IMG_CF_RGBX8888, 82 LV_IMG_CF_RGB565, 83 LV_IMG_CF_RGBA5658, 84 LV_IMG_CF_RGB565A8, 85 86 LV_IMG_CF_RESERVED_15, /**< Reserved for further use.*/ 87 LV_IMG_CF_RESERVED_16, /**< Reserved for further use.*/ 88 LV_IMG_CF_RESERVED_17, /**< Reserved for further use.*/ 89 LV_IMG_CF_RESERVED_18, /**< Reserved for further use.*/ 90 LV_IMG_CF_RESERVED_19, /**< Reserved for further use.*/ 91 LV_IMG_CF_RESERVED_20, /**< Reserved for further use.*/ 92 LV_IMG_CF_RESERVED_21, /**< Reserved for further use.*/ 93 LV_IMG_CF_RESERVED_22, /**< Reserved for further use.*/ 94 LV_IMG_CF_RESERVED_23, /**< Reserved for further use.*/ 95 96 LV_IMG_CF_USER_ENCODED_0, /**< User holder encoding format.*/ 97 LV_IMG_CF_USER_ENCODED_1, /**< User holder encoding format.*/ 98 LV_IMG_CF_USER_ENCODED_2, /**< User holder encoding format.*/ 99 LV_IMG_CF_USER_ENCODED_3, /**< User holder encoding format.*/ 100 LV_IMG_CF_USER_ENCODED_4, /**< User holder encoding format.*/ 101 LV_IMG_CF_USER_ENCODED_5, /**< User holder encoding format.*/ 102 LV_IMG_CF_USER_ENCODED_6, /**< User holder encoding format.*/ 103 LV_IMG_CF_USER_ENCODED_7, /**< User holder encoding format.*/ 104 }; 105 typedef uint8_t lv_img_cf_t; 106 107 108 /** 109 * The first 8 bit is very important to distinguish the different source types. 110 * For more info see `lv_img_get_src_type()` in lv_img.c 111 * On big endian systems the order is reversed so cf and always_zero must be at 112 * the end of the struct. 113 */ 114 #if LV_BIG_ENDIAN_SYSTEM 115 typedef struct { 116 117 uint32_t h : 11; /*Height of the image map*/ 118 uint32_t w : 11; /*Width of the image map*/ 119 uint32_t reserved : 2; /*Reserved to be used later*/ 120 uint32_t always_zero : 3; /*It the upper bits of the first byte. Always zero to look like a 121 non-printable character*/ 122 uint32_t cf : 5; /*Color format: See `lv_img_color_format_t`*/ 123 124 } lv_img_header_t; 125 #else 126 typedef struct { 127 128 uint32_t cf : 5; /*Color format: See `lv_img_color_format_t`*/ 129 uint32_t always_zero : 3; /*It the upper bits of the first byte. Always zero to look like a 130 non-printable character*/ 131 132 uint32_t reserved : 2; /*Reserved to be used later*/ 133 134 uint32_t w : 11; /*Width of the image map*/ 135 uint32_t h : 11; /*Height of the image map*/ 136 } lv_img_header_t; 137 #endif 138 139 /** Image header it is compatible with 140 * the result from image converter utility*/ 141 typedef struct { 142 lv_img_header_t header; /**< A header describing the basics of the image*/ 143 uint32_t data_size; /**< Size of the image in bytes*/ 144 const uint8_t * data; /**< Pointer to the data of the image*/ 145 } lv_img_dsc_t; 146 147 /********************** 148 * GLOBAL PROTOTYPES 149 **********************/ 150 151 /** 152 * Allocate an image buffer in RAM 153 * @param w width of image 154 * @param h height of image 155 * @param cf a color format (`LV_IMG_CF_...`) 156 * @return an allocated image, or NULL on failure 157 */ 158 lv_img_dsc_t * lv_img_buf_alloc(lv_coord_t w, lv_coord_t h, lv_img_cf_t cf); 159 160 /** 161 * Get the color of an image's pixel 162 * @param dsc an image descriptor 163 * @param x x coordinate of the point to get 164 * @param y x coordinate of the point to get 165 * @param color the color of the image. In case of `LV_IMG_CF_ALPHA_1/2/4/8` this color is used. 166 * Not used in other cases. 167 * @param safe true: check out of bounds 168 * @return color of the point 169 */ 170 lv_color_t lv_img_buf_get_px_color(lv_img_dsc_t * dsc, lv_coord_t x, lv_coord_t y, lv_color_t color); 171 172 /** 173 * Get the alpha value of an image's pixel 174 * @param dsc pointer to an image descriptor 175 * @param x x coordinate of the point to set 176 * @param y x coordinate of the point to set 177 * @param safe true: check out of bounds 178 * @return alpha value of the point 179 */ 180 lv_opa_t lv_img_buf_get_px_alpha(lv_img_dsc_t * dsc, lv_coord_t x, lv_coord_t y); 181 182 /** 183 * Set the color of a pixel of an image. The alpha channel won't be affected. 184 * @param dsc pointer to an image descriptor 185 * @param x x coordinate of the point to set 186 * @param y x coordinate of the point to set 187 * @param c color of the point 188 * @param safe true: check out of bounds 189 */ 190 void lv_img_buf_set_px_color(lv_img_dsc_t * dsc, lv_coord_t x, lv_coord_t y, lv_color_t c); 191 192 /** 193 * Set the alpha value of a pixel of an image. The color won't be affected 194 * @param dsc pointer to an image descriptor 195 * @param x x coordinate of the point to set 196 * @param y x coordinate of the point to set 197 * @param opa the desired opacity 198 * @param safe true: check out of bounds 199 */ 200 void lv_img_buf_set_px_alpha(lv_img_dsc_t * dsc, lv_coord_t x, lv_coord_t y, lv_opa_t opa); 201 202 /** 203 * Set the palette color of an indexed image. Valid only for `LV_IMG_CF_INDEXED1/2/4/8` 204 * @param dsc pointer to an image descriptor 205 * @param id the palette color to set: 206 * - for `LV_IMG_CF_INDEXED1`: 0..1 207 * - for `LV_IMG_CF_INDEXED2`: 0..3 208 * - for `LV_IMG_CF_INDEXED4`: 0..15 209 * - for `LV_IMG_CF_INDEXED8`: 0..255 210 * @param c the color to set 211 */ 212 void lv_img_buf_set_palette(lv_img_dsc_t * dsc, uint8_t id, lv_color_t c); 213 214 /** 215 * Free an allocated image buffer 216 * @param dsc image buffer to free 217 */ 218 void lv_img_buf_free(lv_img_dsc_t * dsc); 219 220 /** 221 * Get the memory consumption of a raw bitmap, given color format and dimensions. 222 * @param w width 223 * @param h height 224 * @param cf color format 225 * @return size in bytes 226 */ 227 uint32_t lv_img_buf_get_img_size(lv_coord_t w, lv_coord_t h, lv_img_cf_t cf); 228 229 /** 230 * Get the area of a rectangle if its rotated and scaled 231 * @param res store the coordinates here 232 * @param w width of the rectangle to transform 233 * @param h height of the rectangle to transform 234 * @param angle angle of rotation 235 * @param zoom zoom, (256 no zoom) 236 * @param pivot x,y pivot coordinates of rotation 237 */ 238 void _lv_img_buf_get_transformed_area(lv_area_t * res, lv_coord_t w, lv_coord_t h, int16_t angle, uint16_t zoom, 239 const lv_point_t * pivot); 240 241 /********************** 242 * MACROS 243 **********************/ 244 245 #ifdef __cplusplus 246 } /*extern "C"*/ 247 #endif 248 249 #endif /*LV_IMG_BUF_H*/ 250
