feat(draw_buf): add lv_draw_buf_handlers to allow using custom callbacks
This commit is contained in:
Gabor Kiss-Vamosi
245
src/draw/lv_draw_buf.c
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245
src/draw/lv_draw_buf.c
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/**
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* @file lv_draw_buf_basic.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "../misc/lv_types.h"
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#include "lv_draw_buf.h"
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#include "../stdlib/lv_string.h"
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#include "../core/lv_global.h"
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/*********************
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* DEFINES
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*********************/
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#define handlers LV_GLOBAL_DEFAULT()->draw_buf_handlers
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void buf_init(lv_draw_buf_t * draw_buf, lv_coord_t w, lv_coord_t h, lv_color_format_t color_format);
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static void buf_malloc(lv_draw_buf_t * draw_buf);
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static void buf_realloc(lv_draw_buf_t * draw_buf, lv_coord_t w, lv_coord_t h,
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lv_color_format_t color_format);
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static void buf_free(lv_draw_buf_t * draw_buf);
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static void * buf_get(lv_draw_buf_t * draw_buf);
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static uint32_t width_to_stride(uint32_t w, lv_color_format_t color_format);
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static uint32_t get_stride(const lv_draw_buf_t * draw_buf);
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static void * go_to_xy(lv_draw_buf_t * draw_buf, lv_coord_t x, lv_coord_t y);
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static void buf_clear(lv_draw_buf_t * draw_buf, const lv_area_t * a);
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static void buf_copy(void * dest_buf, uint32_t dest_stride, const lv_area_t * dest_area,
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void * src_buf, uint32_t src_stride, const lv_area_t * src_area, lv_color_format_t color_format);
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static uint8_t * buf_alloc_core(void * old_buf, lv_coord_t w, lv_coord_t h);
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void _lv_draw_buf_init_handlers(void)
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{
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lv_memzero(&handlers, sizeof(lv_draw_buf_handlers_t));
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handlers.init_cb = buf_init;
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handlers.buf_malloc_cb = buf_malloc;
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handlers.buf_realloc_cb = buf_realloc;
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handlers.buf_free_cb = buf_free;
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handlers.buf_get_cb = buf_get;
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handlers.invalidate_cache_cb = NULL;
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handlers.width_to_stride_cb = width_to_stride;
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handlers.get_stride_cb = get_stride;
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handlers.go_to_xy_cb = go_to_xy;
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handlers.buf_clear_cb = buf_clear;
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handlers.buf_copy_cb = buf_copy;
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}
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lv_draw_buf_handlers_t * lv_draw_bug_get_handlers(void)
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{
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return &handlers;
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}
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void lv_draw_buf_init(lv_draw_buf_t * draw_buf, lv_coord_t w, lv_coord_t h, lv_color_format_t color_format)
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{
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if(handlers.init_cb) handlers.init_cb(draw_buf, w, h, color_format);
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}
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void lv_draw_buf_malloc(lv_draw_buf_t * draw_buf)
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{
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if(handlers.buf_malloc_cb) handlers.buf_malloc_cb(draw_buf);
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}
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void lv_draw_buf_realloc(lv_draw_buf_t * draw_buf, lv_coord_t w, lv_coord_t h,
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lv_color_format_t color_format)
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{
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if(handlers.buf_realloc_cb) handlers.buf_realloc_cb(draw_buf, w, h, color_format);
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}
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void lv_draw_buf_free(lv_draw_buf_t * draw_buf)
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{
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if(handlers.buf_free_cb) handlers.buf_free_cb(draw_buf);
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}
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void * lv_draw_buf_get_buf(lv_draw_buf_t * draw_buf)
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{
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if(handlers.buf_get_cb) return handlers.buf_get_cb(draw_buf);
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else return NULL;
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}
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void lv_draw_buf_invalidate_cache(lv_draw_buf_t * draw_buf, const char * area)
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{
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if(handlers.invalidate_cache_cb) handlers.invalidate_cache_cb(draw_buf, area);
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}
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uint32_t lv_draw_buf_width_to_stride(uint32_t w, lv_color_format_t color_format)
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{
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if(handlers.width_to_stride_cb) return handlers.width_to_stride_cb(w, color_format);
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else return 0;
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}
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uint32_t lv_draw_buf_get_stride(const lv_draw_buf_t * draw_buf)
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{
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if(handlers.get_stride_cb) return handlers.get_stride_cb(draw_buf);
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else return 0;
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}
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void * lv_draw_buf_go_to_xy(lv_draw_buf_t * draw_buf, lv_coord_t x, lv_coord_t y)
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{
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if(handlers.go_to_xy_cb) return handlers.go_to_xy_cb(draw_buf, x, y);
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else return NULL;
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}
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void lv_draw_buf_clear(lv_draw_buf_t * draw_buf, const lv_area_t * a)
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{
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if(handlers.buf_clear_cb) handlers.buf_clear_cb(draw_buf, a);
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}
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void lv_draw_buf_copy(void * dest_buf, uint32_t dest_stride, const lv_area_t * dest_area,
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void * src_buf, uint32_t src_stride, const lv_area_t * src_area, lv_color_format_t color_format)
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{
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if(handlers.buf_copy_cb) handlers.buf_copy_cb(dest_buf, dest_stride, dest_area, src_buf, src_stride, src_area,
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color_format);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void buf_init(lv_draw_buf_t * draw_buf, lv_coord_t w, lv_coord_t h, lv_color_format_t color_format)
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{
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draw_buf->width = w;
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draw_buf->height = h;
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draw_buf->color_format = color_format;
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draw_buf->buf = NULL;
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}
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static void buf_malloc(lv_draw_buf_t * draw_buf)
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{
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if(draw_buf->width != 0 ||
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draw_buf->height != 0) draw_buf->buf = buf_alloc_core(NULL, lv_draw_buf_get_stride(draw_buf), draw_buf->height);
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else draw_buf->buf = NULL;
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}
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static void buf_realloc(lv_draw_buf_t * draw_buf, lv_coord_t w, lv_coord_t h,
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lv_color_format_t color_format)
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{
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draw_buf->width = w;
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draw_buf->height = h;
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draw_buf->color_format = color_format;
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draw_buf->buf = buf_alloc_core(draw_buf->buf, lv_draw_buf_get_stride(draw_buf), h);
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}
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static void buf_free(lv_draw_buf_t * draw_buf)
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{
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lv_free(draw_buf->buf);
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}
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static void * buf_get(lv_draw_buf_t * draw_buf)
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{
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uint8_t * buf = draw_buf->buf;
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if(buf) {
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buf += LV_DRAW_BUF_ALIGN - 1;
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buf = (uint8_t *)((lv_uintptr_t) buf & ~(LV_DRAW_BUF_ALIGN - 1));
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}
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return buf;
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}
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static uint32_t width_to_stride(uint32_t w, lv_color_format_t color_format)
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{
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uint32_t width_byte = w * lv_color_format_get_size(color_format);
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return (width_byte + LV_DRAW_BUF_STRIDE_ALIGN - 1) & ~(LV_DRAW_BUF_STRIDE_ALIGN - 1);
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}
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static uint32_t get_stride(const lv_draw_buf_t * draw_buf)
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{
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return lv_draw_buf_width_to_stride(draw_buf->width, draw_buf->color_format);
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}
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static void * go_to_xy(lv_draw_buf_t * draw_buf, lv_coord_t x, lv_coord_t y)
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{
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uint32_t px_size = lv_color_format_get_size(draw_buf->color_format);
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uint32_t stride = lv_draw_buf_get_stride(draw_buf);
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uint8_t * buf_tmp = lv_draw_buf_get_buf(draw_buf);
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buf_tmp += stride * y;
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buf_tmp += x * px_size;
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return buf_tmp;
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}
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static void buf_clear(lv_draw_buf_t * draw_buf, const lv_area_t * a)
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{
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//TODO clear the area
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LV_UNUSED(a);
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uint32_t stride = lv_draw_buf_get_stride(draw_buf);
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uint8_t * buf = lv_draw_buf_get_buf(draw_buf);
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lv_memzero(buf, stride * draw_buf->height);
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}
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static void buf_copy(void * dest_buf, uint32_t dest_stride, const lv_area_t * dest_area,
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void * src_buf, uint32_t src_stride, const lv_area_t * src_area, lv_color_format_t color_format)
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{
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uint8_t px_size = lv_color_format_get_size(color_format);
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uint8_t * dest_bufc = dest_buf;
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uint8_t * src_bufc = src_buf;
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/*Got the first pixel of each buffer*/
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dest_bufc += dest_stride * dest_area->y1;
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dest_bufc += dest_area->x1 * px_size;
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src_bufc += src_stride * src_area->y1;
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src_bufc += src_area->x1 * px_size;
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uint32_t line_length = lv_area_get_width(dest_area) * px_size;
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lv_coord_t y;
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for(y = dest_area->y1; y <= dest_area->y2; y++) {
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lv_memcpy(dest_bufc, src_bufc, line_length);
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dest_bufc += dest_stride;
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src_bufc += src_stride;
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}
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}
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static uint8_t * buf_alloc_core(void * old_buf, lv_coord_t w, lv_coord_t h)
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{
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uint8_t * buf;
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size_t s = w * h + LV_DRAW_BUF_ALIGN - 1;
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if(old_buf) buf = lv_realloc(old_buf, s);
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else buf = lv_malloc(s);
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return buf;
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}
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