257 lines
9.7 KiB
C
257 lines
9.7 KiB
C
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/**
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* @file lv_draw_sdl_composite.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 "../../lv_conf_internal.h"
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#if LV_USE_GPU_SDL
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#include "../../misc/lv_gc.h"
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#include "../../core/lv_refr.h"
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#include "lv_draw_sdl_composite.h"
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#include "lv_draw_sdl_mask.h"
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#include "lv_draw_sdl_utils.h"
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#include "lv_draw_sdl_priv.h"
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#include "lv_draw_sdl_texture_cache.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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lv_sdl_cache_key_magic_t magic;
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lv_draw_sdl_composite_texture_id_t type;
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} composite_key_t;
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static composite_key_t mask_key_create(lv_draw_sdl_composite_texture_id_t type);
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static lv_coord_t next_pow_of_2(lv_coord_t num);
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static void dump_masks(SDL_Texture * texture, const lv_area_t * coords);
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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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bool lv_draw_sdl_composite_begin(lv_draw_sdl_ctx_t * ctx, const lv_area_t * coords_in, const lv_area_t * clip_in,
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const lv_area_t * extension, lv_blend_mode_t blend_mode, lv_area_t * coords_out,
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lv_area_t * clip_out, lv_area_t * apply_area)
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{
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lv_area_t full_coords = *coords_in;
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/* Normalize full_coords */
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if(full_coords.x1 > full_coords.x2) {
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lv_coord_t x2 = full_coords.x2;
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full_coords.x2 = full_coords.x1;
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full_coords.x1 = x2;
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}
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if(full_coords.y1 > full_coords.y2) {
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lv_coord_t y2 = full_coords.y2;
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full_coords.y2 = full_coords.y1;
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full_coords.y1 = y2;
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}
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if(extension) {
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full_coords.x1 -= extension->x1;
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full_coords.x2 += extension->x2;
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full_coords.y1 -= extension->y1;
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full_coords.y2 += extension->y2;
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}
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if(!_lv_area_intersect(apply_area, &full_coords, clip_in)) return false;
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bool has_mask = lv_draw_mask_is_any(apply_area);
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const bool draw_mask = has_mask && LV_GPU_SDL_CUSTOM_BLEND_MODE;
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const bool draw_blend = blend_mode != LV_BLEND_MODE_NORMAL;
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if(draw_mask || draw_blend) {
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lv_draw_sdl_context_internals_t * internals = ctx->internals;
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LV_ASSERT(internals->mask == NULL && internals->composition == NULL);
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lv_coord_t w = lv_area_get_width(apply_area), h = lv_area_get_height(apply_area);
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internals->composition = lv_draw_sdl_composite_texture_obtain(ctx, LV_DRAW_SDL_COMPOSITE_TEXTURE_ID_TARGET0, w, h);
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/* Don't need to worry about overflow */
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lv_coord_t ofs_x = (lv_coord_t) - apply_area->x1, ofs_y = (lv_coord_t) - apply_area->y1;
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/* Offset draw area to start with (0,0) of coords */
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lv_area_move(coords_out, ofs_x, ofs_y);
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lv_area_move(clip_out, ofs_x, ofs_y);
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SDL_SetRenderTarget(ctx->renderer, internals->composition);
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SDL_SetRenderDrawColor(ctx->renderer, 255, 255, 255, 0);
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SDL_RenderClear(ctx->renderer);
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#if LV_GPU_SDL_CUSTOM_BLEND_MODE
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internals->mask = lv_draw_sdl_composite_texture_obtain(ctx, LV_DRAW_SDL_COMPOSITE_TEXTURE_ID_STREAM0, w, h);
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dump_masks(internals->mask, apply_area);
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#endif
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}
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else if(has_mask) {
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/* Fallback mask handling. This will at least make bars looks less bad */
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for(uint8_t i = 0; i < _LV_MASK_MAX_NUM; i++) {
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_lv_draw_mask_common_dsc_t * comm_param = LV_GC_ROOT(_lv_draw_mask_list[i]).param;
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if(comm_param == NULL) continue;
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switch(comm_param->type) {
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case LV_DRAW_MASK_TYPE_RADIUS: {
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const lv_draw_mask_radius_param_t * param = (const lv_draw_mask_radius_param_t *) comm_param;
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if(param->cfg.outer) break;
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_lv_area_intersect(clip_out, apply_area, ¶m->cfg.rect);
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break;
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}
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default:
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break;
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}
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}
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}
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return has_mask;
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}
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void lv_draw_sdl_composite_end(lv_draw_sdl_ctx_t * ctx, const lv_area_t * apply_area, lv_blend_mode_t blend_mode)
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{
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lv_draw_sdl_context_internals_t * internals = ctx->internals;
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SDL_Rect src_rect = {0, 0, lv_area_get_width(apply_area), lv_area_get_height(apply_area)};
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#if LV_GPU_SDL_CUSTOM_BLEND_MODE
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if(internals->mask) {
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SDL_BlendMode mode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_ONE,
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SDL_BLENDOPERATION_ADD, SDL_BLENDFACTOR_ZERO,
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SDL_BLENDFACTOR_SRC_ALPHA, SDL_BLENDOPERATION_ADD);
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SDL_SetTextureBlendMode(internals->mask, mode);
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SDL_RenderCopy(ctx->renderer, internals->mask, &src_rect, &src_rect);
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}
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#endif
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/* Shapes are drawn on composite layer when mask or blend mode is present */
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if(internals->composition) {
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SDL_Rect dst_rect;
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lv_area_to_sdl_rect(apply_area, &dst_rect);
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SDL_SetRenderTarget(ctx->renderer, ctx->base_draw.buf);
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switch(blend_mode) {
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case LV_BLEND_MODE_NORMAL:
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SDL_SetTextureBlendMode(internals->composition, SDL_BLENDMODE_BLEND);
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break;
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case LV_BLEND_MODE_ADDITIVE:
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SDL_SetTextureBlendMode(internals->composition, SDL_BLENDMODE_ADD);
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break;
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#if LV_GPU_SDL_CUSTOM_BLEND_MODE
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case LV_BLEND_MODE_SUBTRACTIVE: {
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SDL_BlendMode mode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_ONE, SDL_BLENDFACTOR_ONE,
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SDL_BLENDOPERATION_SUBTRACT, SDL_BLENDFACTOR_ONE,
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SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_SUBTRACT);
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SDL_SetTextureBlendMode(internals->composition, mode);
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break;
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}
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case LV_BLEND_MODE_MULTIPLY: {
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SDL_BlendMode mode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_ZERO, SDL_BLENDFACTOR_SRC_COLOR,
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SDL_BLENDOPERATION_ADD, SDL_BLENDFACTOR_ZERO,
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SDL_BLENDFACTOR_DST_ALPHA, SDL_BLENDOPERATION_ADD);
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SDL_SetTextureBlendMode(internals->composition, mode);
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break;
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}
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#endif
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default:
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LV_LOG_WARN("Doesn't support blend mode %d", blend_mode);
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SDL_SetTextureBlendMode(internals->composition, SDL_BLENDMODE_BLEND);
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/* Unsupported yet */
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break;
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}
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SDL_RenderCopy(ctx->renderer, internals->composition, &src_rect, &dst_rect);
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}
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internals->mask = internals->composition = NULL;
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}
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SDL_Texture * lv_draw_sdl_composite_texture_obtain(lv_draw_sdl_ctx_t * ctx, lv_draw_sdl_composite_texture_id_t id,
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lv_coord_t w, lv_coord_t h)
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{
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lv_point_t * tex_size = NULL;
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composite_key_t mask_key = mask_key_create(id);
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SDL_Texture * result = lv_draw_sdl_texture_cache_get_with_userdata(ctx, &mask_key, sizeof(composite_key_t), NULL,
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(void **) &tex_size);
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if(!result || tex_size->x < w || tex_size->y < h) {
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lv_coord_t size = next_pow_of_2(LV_MAX(w, h));
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int access = SDL_TEXTUREACCESS_STREAMING;
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if(id >= LV_DRAW_SDL_COMPOSITE_TEXTURE_ID_TARGET0) {
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access = SDL_TEXTUREACCESS_TARGET;
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}
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result = SDL_CreateTexture(ctx->renderer, LV_DRAW_SDL_TEXTURE_FORMAT, access, size, size);
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tex_size = lv_mem_alloc(sizeof(lv_point_t));
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tex_size->x = tex_size->y = size;
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lv_draw_sdl_texture_cache_put_advanced(ctx, &mask_key, sizeof(composite_key_t), result, tex_size, lv_mem_free, 0);
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}
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return result;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static composite_key_t mask_key_create(lv_draw_sdl_composite_texture_id_t type)
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{
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composite_key_t key;
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/* VERY IMPORTANT! Padding between members is uninitialized, so we have to wipe them manually */
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SDL_memset(&key, 0, sizeof(key));
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key.magic = LV_GPU_CACHE_KEY_MAGIC_MASK;
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key.type = type;
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return key;
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}
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static lv_coord_t next_pow_of_2(lv_coord_t num)
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{
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lv_coord_t n = 128;
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while(n < num && n < 16384) {
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n = n << 1;
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}
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return n;
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}
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static void dump_masks(SDL_Texture * texture, const lv_area_t * coords)
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{
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lv_coord_t w = lv_area_get_width(coords), h = lv_area_get_height(coords);
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SDL_assert(w > 0 && h > 0);
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SDL_Rect rect = {0, 0, w, h};
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uint8_t * pixels;
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int pitch;
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if(SDL_LockTexture(texture, &rect, (void **) &pixels, &pitch) != 0) return;
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lv_opa_t * line_buf = lv_mem_buf_get(rect.w);
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for(lv_coord_t y = 0; y < rect.h; y++) {
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lv_memset_ff(line_buf, rect.w);
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lv_coord_t abs_x = (lv_coord_t) coords->x1, abs_y = (lv_coord_t)(y + coords->y1), len = (lv_coord_t) rect.w;
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lv_draw_mask_res_t res;
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res = lv_draw_mask_apply(line_buf, abs_x, abs_y, len);
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if(res == LV_DRAW_MASK_RES_TRANSP) {
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lv_memset_00(&pixels[y * pitch], 4 * rect.w);
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}
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else if(res == LV_DRAW_MASK_RES_FULL_COVER) {
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lv_memset_ff(&pixels[y * pitch], 4 * rect.w);
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}
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else {
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for(int x = 0; x < rect.w; x++) {
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const size_t idx = y * pitch + x * 4;
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pixels[idx] = line_buf[x];
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pixels[idx + 1] = pixels[idx + 2] = pixels[idx + 3] = 0xFF;
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}
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}
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}
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lv_mem_buf_release(line_buf);
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SDL_UnlockTexture(texture);
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}
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#endif /*LV_USE_GPU_SDL*/
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