diff options
Diffstat (limited to 'backend/escl/escl_jpeg.c')
| -rw-r--r-- | backend/escl/escl_jpeg.c | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/backend/escl/escl_jpeg.c b/backend/escl/escl_jpeg.c index 651e7c5..1dd3ec9 100644 --- a/backend/escl/escl_jpeg.c +++ b/backend/escl/escl_jpeg.c @@ -192,34 +192,41 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps) cinfo.out_color_space = JCS_RGB; cinfo.quantize_colors = FALSE; jpeg_calc_output_dimensions(&cinfo); - if (cinfo.output_width < (unsigned int)scanner->caps[scanner->source].width) - scanner->caps[scanner->source].width = cinfo.output_width; - if (scanner->caps[scanner->source].pos_x < 0) - scanner->caps[scanner->source].pos_x = 0; - - if (cinfo.output_height < (unsigned int)scanner->caps[scanner->source].height) - scanner->caps[scanner->source].height = cinfo.output_height; - if (scanner->caps[scanner->source].pos_y < 0) - scanner->caps[scanner->source].pos_y = 0; + double ratio = (double)cinfo.output_width / (double)scanner->caps[scanner->source].width; + int rw = (int)((double)scanner->caps[scanner->source].width * ratio); + int rh = (int)((double)scanner->caps[scanner->source].height * ratio); + int rx = (int)((double)scanner->caps[scanner->source].pos_x * ratio); + int ry = (int)((double)scanner->caps[scanner->source].pos_y * ratio); + + + if (cinfo.output_width < (unsigned int)rw) + rw = cinfo.output_width; + if (rx < 0) + rx = 0; + + if (cinfo.output_height < (unsigned int)rh) + rh = cinfo.output_height; + if (ry < 0) + ry = 0; DBG(10, "1-JPEF Geometry [%dx%d|%dx%d]\n", - scanner->caps[scanner->source].pos_x, - scanner->caps[scanner->source].pos_y, - scanner->caps[scanner->source].width, - scanner->caps[scanner->source].height); - x_off = scanner->caps[scanner->source].pos_x; - if (x_off > (unsigned int)scanner->caps[scanner->source].width) { - w = scanner->caps[scanner->source].width; + rx, + ry, + rw, + rh); + x_off = rx; + if (x_off > (unsigned int)rw) { + w = rw; x_off = 0; } else - w = scanner->caps[scanner->source].width - x_off; - y_off = scanner->caps[scanner->source].pos_y; - if(y_off > (unsigned int)scanner->caps[scanner->source].height) { - h = scanner->caps[scanner->source].height; + w = rw - x_off; + y_off = ry; + if(y_off > (unsigned int)rh) { + h = rh; y_off = 0; } else - h = scanner->caps[scanner->source].height - y_off; + h = rh - y_off; DBG(10, "2-JPEF Geometry [%dx%d|%dx%d]\n", x_off, y_off, @@ -242,7 +249,7 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps) if (y_off > 0) jpeg_skip_scanlines(&cinfo, y_off); pos = 0; - while (cinfo.output_scanline < (unsigned int)scanner->caps[scanner->source].height) { + while (cinfo.output_scanline < (unsigned int)rh) { rowptr[0] = (JSAMPROW)surface + (lineSize * pos); // ..cinfo.output_scanline); jpeg_read_scanlines(&cinfo, rowptr, (JDIMENSION) 1); pos++; @@ -253,7 +260,7 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps) *width = w; *height = h; *bps = cinfo.output_components; - jpeg_finish_decompress(&cinfo); + // jpeg_finish_decompress(&cinfo); jpeg_destroy_decompress(&cinfo); fclose(scanner->tmp); scanner->tmp = NULL; |