/* * Change Logs: * Date Author Notes * 2012-01-24 onelife add TJpgDec (Tiny JPEG Decompressor) support */ #include #include #ifdef RTGUI_IMAGE_JPEG #include #include #include "jpeglib.h" #include #include #include #ifdef RTGUI_USING_DFS_FILERW #include #endif static rt_bool_t rtgui_image_jpeg_check(struct rtgui_filerw* file); static rt_bool_t rtgui_image_jpeg_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load); static void rtgui_image_jpeg_unload(struct rtgui_image* image); static void rtgui_image_jpeg_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* rect); struct rtgui_jpeg_error_mgr { struct jpeg_error_mgr pub; /* "public" fields */ }; struct rtgui_image_jpeg { rt_bool_t is_loaded; struct rtgui_filerw* filerw; /* jpeg structure */ struct jpeg_decompress_struct cinfo; struct rtgui_jpeg_error_mgr errmgr; rt_uint8_t *pixels; rt_uint8_t *line_pixels; }; struct rtgui_image_engine rtgui_image_jpeg_engine = { "jpeg", {RT_NULL}, rtgui_image_jpeg_check, rtgui_image_jpeg_load, rtgui_image_jpeg_unload, rtgui_image_jpeg_blit }; struct rtgui_image_engine rtgui_image_jpg_engine = { "jpg", {RT_NULL}, rtgui_image_jpeg_check, rtgui_image_jpeg_load, rtgui_image_jpeg_unload, rtgui_image_jpeg_blit }; #define INPUT_BUFFER_SIZE 4096 typedef struct { struct jpeg_source_mgr pub; struct rtgui_filerw* ctx; rt_uint8_t buffer[INPUT_BUFFER_SIZE]; } rtgui_jpeg_source_mgr; /* * Initialize source --- called by jpeg_read_header * before any data is actually read. */ static void init_source (j_decompress_ptr cinfo) { /* We don't actually need to do anything */ return; } /* * Fill the input buffer --- called whenever buffer is emptied. */ static boolean fill_input_buffer (j_decompress_ptr cinfo) { rtgui_jpeg_source_mgr * src = (rtgui_jpeg_source_mgr *) cinfo->src; int nbytes; nbytes = rtgui_filerw_read(src->ctx, src->buffer, 1, INPUT_BUFFER_SIZE); if (nbytes <= 0) { /* Insert a fake EOI marker */ src->buffer[0] = (rt_uint8_t) 0xFF; src->buffer[1] = (rt_uint8_t) JPEG_EOI; nbytes = 2; } src->pub.next_input_byte = src->buffer; src->pub.bytes_in_buffer = nbytes; return TRUE; } /* * Skip data --- used to skip over a potentially large amount of * uninteresting data (such as an APPn marker). * * Writers of suspendable-input applications must note that skip_input_data * is not granted the right to give a suspension return. If the skip extends * beyond the data currently in the buffer, the buffer can be marked empty so * that the next read will cause a fill_input_buffer call that can suspend. * Arranging for additional bytes to be discarded before reloading the input * buffer is the application writer's problem. */ static void skip_input_data (j_decompress_ptr cinfo, long num_bytes) { rtgui_jpeg_source_mgr * src = (rtgui_jpeg_source_mgr *) cinfo->src; /* Just a dumb implementation for now. Could use fseek() except * it doesn't work on pipes. Not clear that being smart is worth * any trouble anyway --- large skips are infrequent. */ if (num_bytes > 0) { while (num_bytes > (long) src->pub.bytes_in_buffer) { num_bytes -= (long) src->pub.bytes_in_buffer; (void) src->pub.fill_input_buffer(cinfo); /* note we assume that fill_input_buffer will never * return FALSE, so suspension need not be handled. */ } src->pub.next_input_byte += (size_t) num_bytes; src->pub.bytes_in_buffer -= (size_t) num_bytes; } } /* * Terminate source --- called by jpeg_finish_decompress * after all data has been read. */ static void term_source (j_decompress_ptr cinfo) { /* We don't actually need to do anything */ return; } /* * Prepare for input from a stdio stream. * The caller must have already opened the stream, and is responsible * for closing it after finishing decompression. */ static void rtgui_jpeg_filerw_src_init(j_decompress_ptr cinfo, struct rtgui_filerw *ctx) { rtgui_jpeg_source_mgr *src; /* The source object and input buffer are made permanent so that a series * of JPEG images can be read from the same file by calling jpeg_stdio_src * only before the first one. (If we discarded the buffer at the end of * one image, we'd likely lose the start of the next one.) * This makes it unsafe to use this manager and a different source * manager serially with the same JPEG object. Caveat programmer. */ if (cinfo->src == NULL) { /* first time for this JPEG object? */ cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof(rtgui_jpeg_source_mgr)); src = (rtgui_jpeg_source_mgr *) cinfo->src; } src = (rtgui_jpeg_source_mgr *) cinfo->src; src->pub.init_source = init_source; src->pub.fill_input_buffer = fill_input_buffer; src->pub.skip_input_data = skip_input_data; src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */ src->pub.term_source = term_source; src->ctx = ctx; src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */ src->pub.next_input_byte = NULL; /* until buffer loaded */ } /* get line data of a jpeg image */ static rt_uint8_t *rtgui_image_get_line(struct rtgui_image* image, int h) { struct rtgui_image_jpeg* jpeg; rt_uint8_t *result_ptr; JSAMPARRAY buffer; /* Output row buffer */ int row_stride; RT_ASSERT(image != RT_NULL); jpeg = (struct rtgui_image_jpeg*) image->data; RT_ASSERT(jpeg != RT_NULL); if (h < 0 || h > image->h) return RT_NULL; /* if the image is loaded, */ if (jpeg->is_loaded == RT_TRUE) { result_ptr = jpeg->pixels + (image->w * sizeof(rtgui_color_t)) * h; return result_ptr; } if (jpeg->line_pixels == RT_NULL) jpeg->line_pixels = rtgui_malloc(image->w * sizeof(rtgui_color_t)); row_stride = jpeg->cinfo.output_width * jpeg->cinfo.output_components; buffer = (*jpeg->cinfo.mem->alloc_sarray) ((j_common_ptr) &jpeg->cinfo, JPOOL_IMAGE, row_stride, 1); /* decompress line data */ jpeg->cinfo.output_scanline = h; jpeg_read_scanlines(&jpeg->cinfo, buffer, (JDIMENSION) 1); /* copy pixels memory */ { int index; rtgui_color_t *ptr; ptr = (rtgui_color_t*)jpeg->line_pixels; for (index = 0; index < image->w; index ++) ptr[index] = RTGUI_ARGB(0, buffer[0][index*3], buffer[0][index*3+1], buffer[0][index*3+2]); } return jpeg->line_pixels; } static rt_bool_t rtgui_image_jpeg_loadall(struct rtgui_image* image) { struct rtgui_image_jpeg* jpeg; rt_uint8_t* line_ptr; JSAMPARRAY buffer; /* Output row buffer */ int row_stride; jpeg = (struct rtgui_image_jpeg*) image->data; RT_ASSERT(jpeg != RT_NULL); /* already load */ if (jpeg->pixels != RT_NULL) return RT_TRUE; /* allocate all pixels */ jpeg->pixels = rtgui_malloc(image->h * image->w * sizeof(rtgui_color_t)); if (jpeg->pixels == RT_NULL) return RT_FALSE; /* reset scan line to zero */ jpeg->cinfo.output_scanline = 0; line_ptr = jpeg->pixels; row_stride = jpeg->cinfo.output_width * jpeg->cinfo.output_components; buffer = (*jpeg->cinfo.mem->alloc_sarray) ((j_common_ptr) &jpeg->cinfo, JPOOL_IMAGE, row_stride, 1); /* decompress all pixels */ while (jpeg->cinfo.output_scanline < jpeg->cinfo.output_height) { /* jpeg_read_scanlines expects an array of pointers to scanlines. * Here the array is only one element long, but you could ask for * more than one scanline at a time if that's more convenient. */ (void) jpeg_read_scanlines(&jpeg->cinfo, buffer, 1); /* copy pixels memory */ { int index; rtgui_color_t *ptr; ptr = (rtgui_color_t*)line_ptr; for (index = 0; index < image->w; index ++) ptr[index] = RTGUI_ARGB(0, buffer[0][index*3], buffer[0][index*3+1], buffer[0][index*3+2]); } /* move to next line */ line_ptr += image->w * sizeof(rtgui_color_t); } /* decompress done */ rtgui_filerw_close(jpeg->filerw); jpeg_finish_decompress(&jpeg->cinfo); jpeg->is_loaded = RT_TRUE; return RT_TRUE; } void rtgui_image_jpeg_init() { /* register jpeg on image system */ rtgui_image_register_engine(&rtgui_image_jpeg_engine); /* register jpg on image system */ rtgui_image_register_engine(&rtgui_image_jpg_engine); } static void my_error_exit(j_common_ptr cinfo) { } static void output_no_message(j_common_ptr cinfo) { /* do nothing */ } static rt_bool_t rtgui_image_jpeg_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load) { struct rtgui_image_jpeg* jpeg; jpeg = (struct rtgui_image_jpeg*) rtgui_malloc(sizeof(struct rtgui_image_jpeg)); if (jpeg == RT_NULL) return RT_FALSE; jpeg->filerw = file; /* read file header */ /* Create a decompression structure and load the JPEG header */ jpeg->cinfo.err = jpeg_std_error(&jpeg->errmgr.pub); jpeg->errmgr.pub.error_exit = my_error_exit; jpeg->errmgr.pub.output_message = output_no_message; jpeg_create_decompress(&jpeg->cinfo); rtgui_jpeg_filerw_src_init(&jpeg->cinfo, jpeg->filerw); (void)jpeg_read_header(&jpeg->cinfo, TRUE); image->w = jpeg->cinfo.image_width; image->h = jpeg->cinfo.image_height; /* set image private data and engine */ image->data = jpeg; image->engine = &rtgui_image_jpeg_engine; /* start decompression */ (void) jpeg_start_decompress(&jpeg->cinfo); jpeg->cinfo.out_color_space = JCS_RGB; jpeg->cinfo.quantize_colors = FALSE; /* use fast jpeg */ jpeg->cinfo.scale_num = 1; jpeg->cinfo.scale_denom = 1; jpeg->cinfo.dct_method = JDCT_FASTEST; jpeg->cinfo.do_fancy_upsampling = FALSE; jpeg->pixels = RT_NULL; jpeg->is_loaded = RT_FALSE; /* allocate line pixels */ jpeg->line_pixels = rtgui_malloc(image->w * sizeof(rtgui_color_t)); if (jpeg->line_pixels == RT_NULL) { /* no memory */ jpeg_finish_decompress(&jpeg->cinfo); rt_free(jpeg); return RT_FALSE; } if (load == RT_TRUE) rtgui_image_jpeg_loadall(image); /* create jpeg image successful */ return RT_TRUE; } static void rtgui_image_jpeg_unload(struct rtgui_image* image) { if (image != RT_NULL) { struct rtgui_image_jpeg* jpeg; jpeg = (struct rtgui_image_jpeg*) image->data; RT_ASSERT(jpeg != RT_NULL); if (jpeg->is_loaded == RT_TRUE) rtgui_free(jpeg->pixels); if (jpeg->line_pixels != RT_NULL) rtgui_free(jpeg->line_pixels); if (jpeg->is_loaded != RT_TRUE) { rtgui_filerw_close(jpeg->filerw); jpeg_finish_decompress(&jpeg->cinfo); } rt_free(jpeg); } } static void rtgui_image_jpeg_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* rect) { rt_uint16_t x, y; rtgui_color_t* ptr; struct rtgui_image_jpeg* jpeg; RT_ASSERT(image != RT_NULL && dc != RT_NULL && rect != RT_NULL); jpeg = (struct rtgui_image_jpeg*) image->data; RT_ASSERT(jpeg != RT_NULL); if (jpeg->pixels != RT_NULL) { ptr = (rtgui_color_t*) jpeg->pixels; /* draw each point within dc */ for (y = 0; y < image->h; y ++) { for (x = 0; x < image->w; x++) { /* not alpha */ if ((*ptr >> 24) != 255) { rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1, *ptr); } /* move to next color buffer */ ptr ++; } } } else { /* seek to the begin of file */ rtgui_filerw_seek(jpeg->filerw, 0, SEEK_SET); /* decompress line and line */ for (y = 0; y < image->h; y ++) { ptr = (rtgui_color_t*)rtgui_image_get_line(image, y); for (x = 0; x < image->w; x++) { /* not alpha */ if ((*ptr >> 24) != 255) { rtgui_dc_draw_color_point(dc, x + rect->x1, y + rect->y1, *ptr); } /* move to next color buffer */ ptr ++; } } } } static rt_bool_t rtgui_image_jpeg_check(struct rtgui_filerw* file) { int start; rt_bool_t is_JPG; int in_scan; rt_uint8_t magic[4]; if (file == RT_NULL) return RT_FALSE; /* open file failed */ start = rtgui_filerw_tell(file); is_JPG = RT_FALSE; in_scan = 0; /* seek to the begining of file */ rtgui_filerw_seek(file, 0, SEEK_SET); if ( rtgui_filerw_read(file, magic, 2, 1) ) { if ( (magic[0] == 0xFF) && (magic[1] == 0xD8) ) { is_JPG = RT_TRUE; while (is_JPG == RT_TRUE) { if(rtgui_filerw_read(file, magic, 1, 2) != 2) { is_JPG = RT_FALSE; } else if( (magic[0] != 0xFF) && (in_scan == 0) ) { is_JPG = RT_FALSE; } else if( (magic[0] != 0xFF) || (magic[1] == 0xFF) ) { /* Extra padding in JPEG (legal) */ /* or this is data and we are scanning */ rtgui_filerw_seek(file, -1, SEEK_CUR); } else if(magic[1] == 0xD9) { /* Got to end of good JPEG */ break; } else if( (in_scan == 1) && (magic[1] == 0x00) ) { /* This is an encoded 0xFF within the data */ } else if( (magic[1] >= 0xD0) && (magic[1] < 0xD9) ) { /* These have nothing else */ } else if(rtgui_filerw_read(file, magic+2, 1, 2) != 2) { is_JPG = RT_FALSE; } else { /* Yes, it's big-endian */ rt_uint32_t start; rt_uint32_t size; rt_uint32_t end; start = rtgui_filerw_tell(file); size = (magic[2] << 8) + magic[3]; end = rtgui_filerw_seek(file, size-2, SEEK_CUR); if ( end != start + size - 2 ) is_JPG = RT_FALSE; if ( magic[1] == 0xDA ) { /* Now comes the actual JPEG meat */ /* It is a JPEG. */ break; } } } } } rtgui_filerw_seek(file, start, SEEK_SET); return is_JPG; } #endif #if defined(RTGUI_IMAGE_TJPGD) /***************************************************************************//** * @file image_jpg.c * @brief JPEG decoder using TJpgDec module (elm-chan.org) * COPYRIGHT (C) 2012, RT-Thread Development Team * @author onelife * @version 1.0 ******************************************************************************* * @section License * The license and distribution terms for this file may be found in the file * LICENSE in this distribution or at http://www.rt-thread.org/license/LICENSE ******************************************************************************* * @section Change Logs * Date Author Notes * 2012-01-24 onelife Initial creation for limited memory devices ******************************************************************************/ /***************************************************************************//** * @addtogroup TJpgDec * @{ ******************************************************************************/ /* Includes ------------------------------------------------------------------*/ #include "tjpgd.h" #include #include #include #include #ifdef RTGUI_USING_DFS_FILERW #include #endif /* Private typedef -----------------------------------------------------------*/ struct rtgui_image_jpeg { struct rtgui_filerw* filerw; struct rtgui_dc *dc; rt_uint16_t dst_x, dst_y; rt_uint16_t dst_w, dst_h; rt_bool_t is_loaded; rt_bool_t to_buffer; rt_uint8_t scale; rt_uint8_t byte_per_pixel; JDEC tjpgd; /* jpeg structure */ void *pool; rt_uint8_t *pixels; }; /* Private define ------------------------------------------------------------*/ #define TJPGD_WORKING_BUFFER_SIZE (3100) #define TJPGD_MAX_MCU_WIDTH_ON_DISP (2 * 8 * 4) /* Y component: 2x2; Display: 4-byte per pixel */ #define TJPGD_MAX_SCALING_FACTOR (3) #define hw_driver (rtgui_graphic_driver_get_default()) /* Private macro -------------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* static rt_bool_t rtgui_image_jpeg_check(struct rtgui_filerw* file, rt_uint16_t *width, rt_uint16_t *height); static rt_bool_t rtgui_image_jpeg_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_uint8_t scale, rt_bool_t load); */ static rt_bool_t rtgui_image_jpeg_check(struct rtgui_filerw* file); static rt_bool_t rtgui_image_jpeg_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load); static void rtgui_image_jpeg_unload(struct rtgui_image* image); static void rtgui_image_jpeg_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* dst_rect); /* Private variables ---------------------------------------------------------*/ struct rtgui_image_engine rtgui_image_jpeg_engine = { "jpeg", {RT_NULL}, rtgui_image_jpeg_check, rtgui_image_jpeg_load, rtgui_image_jpeg_unload, rtgui_image_jpeg_blit }; struct rtgui_image_engine rtgui_image_jpg_engine = { "jpg", {RT_NULL}, rtgui_image_jpeg_check, rtgui_image_jpeg_load, rtgui_image_jpeg_unload, rtgui_image_jpeg_blit }; /* Private functions ---------------------------------------------------------*/ void rtgui_image_jpeg_init() { /* register jpeg on image system */ rtgui_image_register_engine(&rtgui_image_jpeg_engine); /* register jpg on image system */ rtgui_image_register_engine(&rtgui_image_jpg_engine); } static UINT tjpgd_in_func(JDEC *jdec, BYTE *buff, UINT ndata) { struct rtgui_filerw *file = *(struct rtgui_filerw **)jdec->device; if (buff == RT_NULL) { return rtgui_filerw_seek(file, ndata, RTGUI_FILE_SEEK_CUR); } return rtgui_filerw_read(file, (void *)buff, 1, ndata); } static UINT tjpgd_out_func(JDEC *jdec, void *bitmap, JRECT *rect) { struct rtgui_image_jpeg *jpeg = (struct rtgui_image_jpeg *)jdec->device; rt_uint16_t w, h, y; rt_uint16_t rectWidth; /* Width of source rectangular (bytes) */ rt_uint8_t *src, *dst; /* Put progress indicator */ if (rect->left == 0) { rt_kprintf("\r%lu%%", (rect->top << jpeg->scale) * 100UL / jdec->height); } /* Copy the decompressed RGB rectanglar to the frame buffer */ rectWidth = (rect->right - rect->left + 1) * jpeg->byte_per_pixel; src = (rt_uint8_t *)bitmap; if (jpeg->to_buffer) { rt_uint16_t imageWidth; /* Width of image (bytes) */ imageWidth = (jdec->width >> jdec->scale) * jpeg->byte_per_pixel; dst = jpeg->pixels + rect->top * imageWidth + rect->left * jpeg->byte_per_pixel; /* Left-top of destination rectangular */ for (h = rect->top; h <= rect->bottom; h++) { rt_memcpy(dst, src, rectWidth); src += rectWidth; dst += imageWidth; /* Next line */ } } else { rtgui_blit_line_func blit_line = RT_NULL; w = rect->right < jpeg->dst_w ? rect->right : jpeg->dst_w; w = w - rect->left + 1; h = rect->bottom < jpeg->dst_h ? rect->bottom : jpeg->dst_h; h = h - rect->top + 1; if (jpeg->byte_per_pixel == hw_driver->bits_per_pixel / 8) { if (hw_driver->pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB565) { blit_line = rtgui_blit_line_get_inv(hw_driver->bits_per_pixel / 8, jpeg->byte_per_pixel); } } else { blit_line = rtgui_blit_line_get(hw_driver->bits_per_pixel / 8, jpeg->byte_per_pixel); } if (blit_line) { rt_uint8_t line_buf[TJPGD_MAX_MCU_WIDTH_ON_DISP]; for (y = 0; y < h; y++) { blit_line(line_buf, src, w * jpeg->byte_per_pixel); jpeg->dc->engine->blit_line(jpeg->dc, jpeg->dst_x + rect->left, jpeg->dst_x + rect->left + w - 1, jpeg->dst_y + rect->top + y, line_buf); src += rectWidth; } } else { for (y = 0; y < h; y++) { jpeg->dc->engine->blit_line(jpeg->dc, jpeg->dst_x + rect->left, jpeg->dst_x + rect->left + w - 1, jpeg->dst_y + rect->top + y, src); src += rectWidth; } } } return 1; /* Continue to decompress */ } static rt_bool_t rtgui_image_jpeg_check(struct rtgui_filerw* file) //static rt_bool_t rtgui_image_jpeg_check(struct rtgui_filerw* file, // rt_uint32_t *width, rt_uint32_t *height) { rt_bool_t is_JPG; JDEC tjpgd; void *pool; is_JPG = RT_FALSE; do { if (!file ) { break; } pool = rt_malloc(TJPGD_WORKING_BUFFER_SIZE); if (pool == RT_NULL) { rt_kprintf("TJPGD err: no mem\n"); break; } if (rtgui_filerw_seek(file, 0, SEEK_SET) == -1) { break; } if (jd_prepare(&tjpgd, tjpgd_in_func, pool, TJPGD_WORKING_BUFFER_SIZE, (void *)&file) == JDR_OK) { // *width = (rt_uint32_t)tjpgd.width; // *height = (rt_uint32_t)tjpgd.height; is_JPG = RT_TRUE; } rt_kprintf("TJPGD: check OK\n"); } while(0); rt_free(pool); return is_JPG; } static rt_bool_t rtgui_image_jpeg_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load) //static rt_bool_t rtgui_image_jpeg_load(struct rtgui_image* image, // struct rtgui_filerw* file, rt_uint8_t scale, rt_bool_t load) { rt_uint8_t scale = 2; rt_bool_t res = RT_FALSE; struct rtgui_image_jpeg *jpeg; JRESULT ret; if (scale > TJPGD_MAX_SCALING_FACTOR) { return RT_FALSE; } do { jpeg = (struct rtgui_image_jpeg *)rt_malloc(sizeof(struct rtgui_image_jpeg)); if (jpeg == RT_NULL) { break; } jpeg->filerw = file; jpeg->is_loaded = RT_FALSE; jpeg->to_buffer = load; jpeg->scale = scale; #if (JD_FORMAT == 0) jpeg->byte_per_pixel = 3; #elif (JD_FORMAT == 1) jpeg->byte_per_pixel = 2; #endif jpeg->pool = RT_NULL; jpeg->pixels = RT_NULL; jpeg->pool = rt_malloc(TJPGD_WORKING_BUFFER_SIZE); if (jpeg->pool == RT_NULL) { rt_kprintf("TJPGD err: no mem (%d)\n", TJPGD_WORKING_BUFFER_SIZE); break; } if (rtgui_filerw_seek(jpeg->filerw, 0, SEEK_SET) == -1) { break; } ret = jd_prepare(&jpeg->tjpgd, tjpgd_in_func, jpeg->pool, TJPGD_WORKING_BUFFER_SIZE, (void *)jpeg); if (ret != JDR_OK) { if (ret == JDR_FMT3) { rt_kprintf("TJPGD: not supported format\n"); } break; } rt_kprintf("TJPGD: prepare OK\n"); image->w = (rt_uint16_t)jpeg->tjpgd.width >> jpeg->scale; image->h = (rt_uint16_t)jpeg->tjpgd.height >> jpeg->scale; /* set image private data and engine */ image->data = jpeg; image->engine = &rtgui_image_jpeg_engine; if (jpeg->to_buffer == RT_TRUE) { jpeg->pixels = (rt_uint8_t *)rtgui_malloc( jpeg->byte_per_pixel * image->w * image->h); if (jpeg->pixels == RT_NULL) { rt_kprintf("TJPGD err: no mem to load (%d)\n", jpeg->byte_per_pixel * image->w * image->h); break; } ret = jd_decomp(&jpeg->tjpgd, tjpgd_out_func, jpeg->scale); if (ret != JDR_OK) { break; } rtgui_filerw_close(jpeg->filerw); jpeg->is_loaded = RT_TRUE; rt_kprintf("TJPGD: load to RAM\n"); } res = RT_TRUE; } while(0); if (!res || jpeg->is_loaded) { rt_free(jpeg->pool); } if (!res) { rtgui_free(jpeg->pixels); rt_free(jpeg); } /* create jpeg image successful */ return res; } static void rtgui_image_jpeg_unload(struct rtgui_image* image) { if (image != RT_NULL) { struct rtgui_image_jpeg* jpeg; jpeg = (struct rtgui_image_jpeg*) image->data; RT_ASSERT(jpeg != RT_NULL); if (jpeg->to_buffer == RT_TRUE) { if (jpeg->is_loaded == RT_TRUE) { rtgui_free(jpeg->pixels); } if (jpeg->is_loaded != RT_TRUE) { rtgui_filerw_close(jpeg->filerw); } } else { rt_free(jpeg->pool); rtgui_filerw_close(jpeg->filerw); } rt_free(jpeg); } rt_kprintf("TJPGD: unload\n"); } static void rtgui_image_jpeg_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* dst_rect) { rt_uint16_t w, h, y; struct rtgui_image_jpeg *jpeg; jpeg = (struct rtgui_image_jpeg *) image->data; RT_ASSERT(image != RT_NULL || dc != RT_NULL || dst_rect != RT_NULL || jpeg != RT_NULL); do { /* this dc is not visible */ if (rtgui_dc_get_visible(dc) != RT_TRUE) { break; } jpeg->dc= dc; /* the minimum rect */ if (image->w < rtgui_rect_width(*dst_rect)) { w = image->w; } else { w = rtgui_rect_width(*dst_rect); } if (image->h < rtgui_rect_height(*dst_rect)) { h = image->h; } else { h = rtgui_rect_height(*dst_rect); } if (!jpeg->is_loaded) { JRESULT ret; jpeg->dst_x = dst_rect->x1; jpeg->dst_y = dst_rect->y1; jpeg->dst_w = w; jpeg->dst_h = h; ret = jd_decomp(&jpeg->tjpgd, tjpgd_out_func, jpeg->scale); if (ret != JDR_OK) { break; } rt_kprintf("TJPGD: load to display\n"); } else { rt_uint8_t* src = jpeg->pixels; rt_uint16_t imageWidth = image->w * jpeg->byte_per_pixel; rtgui_blit_line_func blit_line = RT_NULL; if (jpeg->byte_per_pixel == hw_driver->bits_per_pixel / 8) { if (hw_driver->pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB565) { blit_line = rtgui_blit_line_get_inv(hw_driver->bits_per_pixel / 8, jpeg->byte_per_pixel); } } else { blit_line = rtgui_blit_line_get(hw_driver->bits_per_pixel / 8, jpeg->byte_per_pixel); } if (blit_line) { rt_uint16_t x; rt_uint8_t temp[4]; for (y = 0; y < h; y++) { for (x = 0; x < w; x++) { blit_line(temp, src, jpeg->byte_per_pixel); src += jpeg->byte_per_pixel; dc->engine->blit_line(dc, dst_rect->x1 + x, dst_rect->x1 + x, dst_rect->y1 + y, temp); } } } else { for (y = 0; y < h; y++) { dc->engine->blit_line(dc, dst_rect->x1, dst_rect->x1 + w - 1, dst_rect->y1 + y, src); src += imageWidth; } } } } while(0); } #endif /* defined(RTGUI_IMAGE_TJPGD) */ /***************************************************************************//** * @} ******************************************************************************/