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/**
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* @file lv_draw_sw.h
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*
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*/
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#ifndef LV_DRAW_SW_H
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#define LV_DRAW_SW_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_sw_blend.h"
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#include "liblvgl/draw/lv_draw.h"
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#include "liblvgl/misc/lv_area.h"
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#include "liblvgl/misc/lv_color.h"
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#include "liblvgl/hal/lv_hal_disp.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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struct _lv_disp_drv_t;
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typedef struct {
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lv_draw_ctx_t base_draw;
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/** Fill an area of the destination buffer with a color*/
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void (*blend)(lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc);
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} lv_draw_sw_ctx_t;
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typedef struct {
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lv_draw_layer_ctx_t base_draw;
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uint32_t buf_size_bytes: 31;
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uint32_t has_alpha : 1;
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} lv_draw_sw_layer_ctx_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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void lv_draw_sw_init_ctx(struct _lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ctx);
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void lv_draw_sw_deinit_ctx(struct _lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ctx);
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void lv_draw_sw_wait_for_finish(lv_draw_ctx_t * draw_ctx);
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void lv_draw_sw_arc(lv_draw_ctx_t * draw_ctx, const lv_draw_arc_dsc_t * dsc, const lv_point_t * center, uint16_t radius,
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uint16_t start_angle, uint16_t end_angle);
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void lv_draw_sw_rect(lv_draw_ctx_t * draw_ctx, const lv_draw_rect_dsc_t * dsc, const lv_area_t * coords);
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void lv_draw_sw_bg(lv_draw_ctx_t * draw_ctx, const lv_draw_rect_dsc_t * dsc, const lv_area_t * coords);
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void lv_draw_sw_letter(lv_draw_ctx_t * draw_ctx, const lv_draw_label_dsc_t * dsc, const lv_point_t * pos_p,
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uint32_t letter);
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LV_ATTRIBUTE_FAST_MEM void lv_draw_sw_img_decoded(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * draw_dsc,
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const lv_area_t * coords, const uint8_t * src_buf, lv_img_cf_t cf);
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LV_ATTRIBUTE_FAST_MEM void lv_draw_sw_line(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_line_dsc_t * dsc,
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const lv_point_t * point1, const lv_point_t * point2);
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void lv_draw_sw_polygon(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_rect_dsc_t * draw_dsc,
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const lv_point_t * points, uint16_t point_cnt);
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void lv_draw_sw_buffer_copy(lv_draw_ctx_t * draw_ctx,
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void * dest_buf, lv_coord_t dest_stride, const lv_area_t * dest_area,
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void * src_buf, lv_coord_t src_stride, const lv_area_t * src_area);
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void lv_draw_sw_transform(lv_draw_ctx_t * draw_ctx, const lv_area_t * dest_area, const void * src_buf,
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lv_coord_t src_w, lv_coord_t src_h, lv_coord_t src_stride,
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const lv_draw_img_dsc_t * draw_dsc, lv_img_cf_t cf, lv_color_t * cbuf, lv_opa_t * abuf);
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struct _lv_draw_layer_ctx_t * lv_draw_sw_layer_create(struct _lv_draw_ctx_t * draw_ctx, lv_draw_layer_ctx_t * layer_ctx,
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lv_draw_layer_flags_t flags);
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void lv_draw_sw_layer_adjust(struct _lv_draw_ctx_t * draw_ctx, struct _lv_draw_layer_ctx_t * layer_ctx,
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lv_draw_layer_flags_t flags);
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void lv_draw_sw_layer_blend(struct _lv_draw_ctx_t * draw_ctx, struct _lv_draw_layer_ctx_t * layer_ctx,
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const lv_draw_img_dsc_t * draw_dsc);
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void lv_draw_sw_layer_destroy(lv_draw_ctx_t * draw_ctx, lv_draw_layer_ctx_t * layer_ctx);
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/***********************
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* GLOBAL VARIABLES
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***********************/
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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_DRAW_SW_H*/
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@@ -0,0 +1,69 @@
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/**
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* @file lv_draw_sw_blend.h
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*
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*/
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#ifndef LV_DRAW_SW_BLEND_H
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#define LV_DRAW_SW_BLEND_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 "liblvgl/misc/lv_color.h"
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#include "liblvgl/misc/lv_area.h"
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#include "liblvgl/misc/lv_style.h"
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#include "liblvgl/draw/lv_draw_mask.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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typedef struct {
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const lv_area_t * blend_area; /**< The area with absolute coordinates to draw on `draw_ctx->buf`
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* will be clipped to `draw_ctx->clip_area` */
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const lv_color_t * src_buf; /**< Pointer to an image to blend. If set `fill_color` is ignored */
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lv_color_t color; /**< Fill color*/
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lv_opa_t * mask_buf; /**< NULL if ignored, or an alpha mask to apply on `blend_area`*/
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lv_draw_mask_res_t mask_res; /**< The result of the previous mask operation */
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const lv_area_t * mask_area; /**< The area of `mask_buf` with absolute coordinates*/
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lv_opa_t opa; /**< The overall opacity*/
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lv_blend_mode_t blend_mode; /**< E.g. LV_BLEND_MODE_ADDITIVE*/
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} lv_draw_sw_blend_dsc_t;
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struct _lv_draw_ctx_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**
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* Call the blend function of the `draw_ctx`.
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* @param draw_ctx pointer to a draw context
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* @param dsc pointer to an initialized blend descriptor
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*/
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void lv_draw_sw_blend(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc);
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/**
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* The basic blend function used with software rendering.
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* @param draw_ctx pointer to a draw context
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* @param dsc pointer to an initialized blend descriptor
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*/
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LV_ATTRIBUTE_FAST_MEM void lv_draw_sw_blend_basic(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc);
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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_DRAW_SW_BLEND_H*/
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/**
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* @file lv_draw_sw_dither.h
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*
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*/
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#ifndef LV_DRAW_SW_DITHER_H
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#define LV_DRAW_SW_DITHER_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 "liblvgl/core/lv_obj_pos.h"
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/*********************
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* DEFINES
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*********************/
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#if LV_COLOR_DEPTH < 32 && LV_DITHER_GRADIENT == 1
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#define _DITHER_GRADIENT 1
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#else
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#define _DITHER_GRADIENT 0
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#endif
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/**********************
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* TYPEDEFS
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**********************/
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#if _DITHER_GRADIENT
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/*A signed error color component*/
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typedef struct {
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int8_t r, g, b;
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} lv_scolor24_t;
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struct _lv_gradient_cache_t;
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typedef void (*lv_dither_func_t)(struct _lv_gradient_cache_t * grad, lv_coord_t x, lv_coord_t y, lv_coord_t w);
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#endif
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/**********************
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* PROTOTYPES
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**********************/
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#if LV_DRAW_COMPLEX
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#if _DITHER_GRADIENT
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LV_ATTRIBUTE_FAST_MEM void lv_dither_none(struct _lv_gradient_cache_t * grad, lv_coord_t x, lv_coord_t y, lv_coord_t w);
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LV_ATTRIBUTE_FAST_MEM void lv_dither_ordered_hor(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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LV_ATTRIBUTE_FAST_MEM void lv_dither_ordered_ver(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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#if LV_DITHER_ERROR_DIFFUSION == 1
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LV_ATTRIBUTE_FAST_MEM void lv_dither_err_diff_hor(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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LV_ATTRIBUTE_FAST_MEM void lv_dither_err_diff_ver(struct _lv_gradient_cache_t * grad, const lv_coord_t xs,
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const lv_coord_t y, const lv_coord_t w);
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#endif /* LV_DITHER_ERROR_DIFFUSION */
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#endif /* _DITHER_GRADIENT */
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#endif
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif
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/**
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* @file lv_draw_sw_gradient.h
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*
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*/
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#ifndef LV_DRAW_SW_GRADIENT_H
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#define LV_DRAW_SW_GRADIENT_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 "liblvgl/misc/lv_color.h"
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#include "liblvgl/misc/lv_style.h"
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#include "lv_draw_sw_dither.h"
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/*********************
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* DEFINES
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*********************/
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#if LV_GRADIENT_MAX_STOPS < 2
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#error LVGL needs at least 2 stops for gradients. Please increase the LV_GRADIENT_MAX_STOPS
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#endif
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/**********************
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* TYPEDEFS
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**********************/
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#if _DITHER_GRADIENT
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typedef lv_color32_t lv_grad_color_t;
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#else
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typedef lv_color_t lv_grad_color_t;
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#endif
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/** To avoid recomputing gradient for each draw operation,
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* it's possible to cache the computation in this structure instance.
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* Whenever possible, this structure is reused instead of recomputing the gradient map */
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typedef struct _lv_gradient_cache_t {
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uint32_t key; /**< A discriminating key that's built from the drawing operation.
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* If the key does not match, the cache item is not used */
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uint32_t life : 30; /**< A life counter that's incremented on usage. Higher counter is
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* less likely to be evicted from the cache */
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uint32_t filled : 1; /**< Used to skip dithering in it if already done */
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uint32_t not_cached: 1; /**< The cache was too small so this item is not managed by the cache*/
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lv_color_t * map; /**< The computed gradient low bitdepth color map, points into the
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* cache's buffer, no free needed */
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lv_coord_t alloc_size; /**< The map allocated size in colors */
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lv_coord_t size; /**< The computed gradient color map size, in colors */
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#if _DITHER_GRADIENT
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lv_color32_t * hmap; /**< If dithering, we need to store the current, high bitdepth gradient
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* map too, points to the cache's buffer, no free needed */
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#if LV_DITHER_ERROR_DIFFUSION == 1
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lv_scolor24_t * error_acc; /**< Error diffusion dithering algorithm requires storing the last error
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* drawn, points to the cache's buffer, no free needed */
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lv_coord_t w; /**< The error array width in pixels */
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#endif
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#endif
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} lv_grad_t;
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/**********************
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* PROTOTYPES
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**********************/
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/** Compute the color in the given gradient and fraction
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* Gradient are specified in a virtual [0-255] range, so this function scales the virtual range to the given range
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* @param dsc The gradient descriptor to use
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* @param range The range to use in computation.
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* @param frac The current part used in the range. frac is in [0; range]
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*/
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LV_ATTRIBUTE_FAST_MEM lv_grad_color_t lv_gradient_calculate(const lv_grad_dsc_t * dsc, lv_coord_t range,
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lv_coord_t frac);
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/**
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* Set the gradient cache size
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* @param max_bytes Max cahce size
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*/
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void lv_gradient_set_cache_size(size_t max_bytes);
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/** Free the gradient cache */
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void lv_gradient_free_cache(void);
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/** Get a gradient cache from the given parameters */
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lv_grad_t * lv_gradient_get(const lv_grad_dsc_t * gradient, lv_coord_t w, lv_coord_t h);
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/**
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* Clean up the gradient item after it was get with `lv_grad_get_from_cache`.
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* @param grad pointer to a gradient
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*/
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void lv_gradient_cleanup(lv_grad_t * grad);
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif /*LV_DRAW_GRADIENT_H*/
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