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https://github.com/CTCaer/hekate.git
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185526d134
BDK will allow developers to use the full collection of drivers, with limited editing, if any, for making payloads for Nintendo Switch. Using a single source for everything will also help decoupling Switch specific code and easily port it to other Tegra X1/X1+ platforms. And maybe even to lower targets. Everything is now centrilized into bdk folder. Every module or project can utilize it by simply including it. This is just the start and it will continue to improve.
167 lines
6.1 KiB
C
167 lines
6.1 KiB
C
/**
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* @file lv_draw_img.h
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*
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*/
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#ifndef LV_DRAW_IMG_H
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#define LV_DRAW_IMG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************
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* INCLUDES
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*********************/
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#include "lv_draw.h"
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#include "../lv_core/lv_obj.h"
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/*********************
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* DEFINES
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*********************/
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#define LV_IMG_DECODER_OPEN_FAIL ((void*)(-1))
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/**********************
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* TYPEDEFS
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**********************/
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struct _lv_img_t;
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typedef struct {
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/* The first 8 bit is very important to distinguish the different source types.
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* For more info see `lv_img_get_src_type()` in lv_img.c */
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uint32_t cf :5; /* Color format: See `lv_img_color_format_t`*/
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uint32_t always_zero :3; /*It the upper bits of the first byte. Always zero to look like a non-printable character*/
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uint32_t reserved :2; /*Reserved to be used later*/
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uint32_t w:11; /*Width of the image map*/
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uint32_t h:11; /*Height of the image map*/
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} lv_img_header_t;
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/*Image color format*/
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enum {
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LV_IMG_CF_UNKOWN = 0,
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LV_IMG_CF_RAW, /*Contains the file as it is. Needs custom decoder function*/
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LV_IMG_CF_RAW_ALPHA, /*Contains the file as it is. The image has alpha. Needs custom decoder function*/
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LV_IMG_CF_RAW_CHROMA_KEYED, /*Contains the file as it is. The image is chroma keyed. Needs custom decoder function*/
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LV_IMG_CF_TRUE_COLOR, /*Color format and depth should match with LV_COLOR settings*/
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LV_IMG_CF_TRUE_COLOR_ALPHA, /*Same as `LV_IMG_CF_TRUE_COLOR` but every pixel has an alpha byte*/
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LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED, /*Same as `LV_IMG_CF_TRUE_COLOR` but LV_COLOR_TRANSP pixels will be transparent*/
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LV_IMG_CF_INDEXED_1BIT, /*Can have 2 different colors in a palette (always chroma keyed)*/
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LV_IMG_CF_INDEXED_2BIT, /*Can have 4 different colors in a palette (always chroma keyed)*/
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LV_IMG_CF_INDEXED_4BIT, /*Can have 16 different colors in a palette (always chroma keyed)*/
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LV_IMG_CF_INDEXED_8BIT, /*Can have 256 different colors in a palette (always chroma keyed)*/
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LV_IMG_CF_ALPHA_1BIT, /*Can have one color and it can be drawn or not*/
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LV_IMG_CF_ALPHA_2BIT, /*Can have one color but 4 different alpha value*/
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LV_IMG_CF_ALPHA_4BIT, /*Can have one color but 16 different alpha value*/
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LV_IMG_CF_ALPHA_8BIT, /*Can have one color but 256 different alpha value*/
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};
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typedef uint8_t lv_img_cf_t;
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/* Image header it is compatible with
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* the result image converter utility*/
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typedef struct
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{
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lv_img_header_t header;
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uint32_t data_size;
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const uint8_t * data;
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} lv_img_dsc_t;
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/* Decoder function definitions */
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/**
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* Get info from an image and store in the `header`
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* @param src the image source. Can be a pointer to a C array or a file name (Use `lv_img_src_get_type` to determine the type)
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* @param header store the info here
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* @return LV_RES_OK: info written correctly; LV_RES_INV: failed
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*/
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typedef lv_res_t (*lv_img_decoder_info_f_t)(const void * src, lv_img_header_t * header);
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/**
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* Open an image for decoding. Prepare it as it is required to read it later
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* @param src the image source. Can be a pointer to a C array or a file name (Use `lv_img_src_get_type` to determine the type)
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* @param style the style of image (maybe it will be required to determine a color or something)
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* @return there are 3 possible return values:
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* 1) buffer with the decoded image
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* 2) if can decode the whole image NULL. decoder_read_line will be called to read the image line-by-line
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* 3) LV_IMG_DECODER_OPEN_FAIL if the image format is unknown to the decoder or an error occurred
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*/
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typedef const uint8_t * (*lv_img_decoder_open_f_t)(const void * src, const lv_style_t * style);
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/**
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* Decode `len` pixels starting from the given `x`, `y` coordinates and store them in `buf`.
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* Required only if the "open" function can't return with the whole decoded pixel array.
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* @param x start x coordinate
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* @param y startt y coordinate
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* @param len number of pixels to decode
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* @param buf a buffer to store the decoded pixels
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* @return LV_RES_OK: ok; LV_RES_INV: failed
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*/
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typedef lv_res_t (*lv_img_decoder_read_line_f_t)(lv_coord_t x, lv_coord_t y, lv_coord_t len, uint8_t * buf);
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/**
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* Close the pending decoding. Free resources etc.
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*/
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typedef void (*lv_img_decoder_close_f_t)(void);
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**
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* Draw an image
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* @param coords the coordinates of the image
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* @param mask the image will be drawn only in this area
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* @param src pointer to a lv_color_t array which contains the pixels of the image
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* @param style style of the image
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* @param opa_scale scale down all opacities by the factor
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*/
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void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask,
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const void * src, const lv_style_t * style, lv_opa_t opa_scale);
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/**
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* Get the type of an image source
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* @param src pointer to an image source:
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* - pointer to an 'lv_img_t' variable (image stored internally and compiled into the code)
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* - a path to a file (e.g. "S:/folder/image.bin")
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* - or a symbol (e.g. SYMBOL_CLOSE)
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* @return type of the image source LV_IMG_SRC_VARIABLE/FILE/SYMBOL/UNKOWN
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*/
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lv_img_src_t lv_img_src_get_type(const void * src);
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/**
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* Set custom decoder functions. See the typdefs of the function typed above for more info about them
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* @param info_fp info get function
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* @param open_fp open function
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* @param read_fp read line function
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* @param close_fp clode function
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*/
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void lv_img_decoder_set_custom(lv_img_decoder_info_f_t info_fp, lv_img_decoder_open_f_t open_fp,
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lv_img_decoder_read_line_f_t read_fp, lv_img_decoder_close_f_t close_fp);
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lv_res_t lv_img_dsc_get_info(const char * src, lv_img_header_t * header);
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uint8_t lv_img_color_format_get_px_size(lv_img_cf_t cf);
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bool lv_img_color_format_is_chroma_keyed(lv_img_cf_t cf);
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bool lv_img_color_format_has_alpha(lv_img_cf_t cf);
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/**********************
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* MACROS
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**********************/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /*LV_TEMPL_H*/
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