22 void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height,  in WebPRescalerInit()  argument
28   wrk->x_expand = (src_width < dst_width);  in WebPRescalerInit()
29   wrk->y_expand = (src_height < dst_height);  in WebPRescalerInit()
30   wrk->src_width = src_width;  in WebPRescalerInit()
31   wrk->src_height = src_height;  in WebPRescalerInit()
32   wrk->dst_width = dst_width;  in WebPRescalerInit()
33   wrk->dst_height = dst_height;  in WebPRescalerInit()
34   wrk->src_y = 0;  in WebPRescalerInit()
35   wrk->dst_y = 0;  in WebPRescalerInit()
36   wrk->dst = dst;  in WebPRescalerInit()
37   wrk->dst_stride = dst_stride;  in WebPRescalerInit()
38   wrk->num_channels = num_channels;  in WebPRescalerInit()
41   wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add;  in WebPRescalerInit()
42   wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub;  in WebPRescalerInit()
43   if (!wrk->x_expand) {  // fx_scale is not used otherwise  in WebPRescalerInit()
44     wrk->fx_scale = WEBP_RESCALER_FRAC(1, wrk->x_sub);  in WebPRescalerInit()
47   wrk->y_add = wrk->y_expand ? y_add - 1 : y_add;  in WebPRescalerInit()
48   wrk->y_sub = wrk->y_expand ? y_sub - 1 : y_sub;  in WebPRescalerInit()
49   wrk->y_accum = wrk->y_expand ? wrk->y_sub : wrk->y_add;  in WebPRescalerInit()
50   if (!wrk->y_expand) {  in WebPRescalerInit()
55         (uint64_t)dst_height * WEBP_RESCALER_ONE / (wrk->x_add * wrk->y_add);  in WebPRescalerInit()
61       wrk->fxy_scale = 0;  in WebPRescalerInit()
63       wrk->fxy_scale = (uint32_t)ratio;  in WebPRescalerInit()
65     wrk->fy_scale = WEBP_RESCALER_FRAC(1, wrk->y_sub);  in WebPRescalerInit()
67     wrk->fy_scale = WEBP_RESCALER_FRAC(1, wrk->x_add);  in WebPRescalerInit()
70   wrk->irow = work;  in WebPRescalerInit()
71   wrk->frow = work + num_channels * dst_width;  in WebPRescalerInit()
110 int WebPRescaleNeededLines(const WebPRescaler* const wrk, int max_num_lines) {  in WebPRescaleNeededLines()  argument
111   const int num_lines = (wrk->y_accum + wrk->y_sub - 1) / wrk->y_sub;  in WebPRescaleNeededLines()
115 int WebPRescalerImport(WebPRescaler* const wrk, int num_lines,  in WebPRescalerImport()  argument
118   while (total_imported < num_lines && !WebPRescalerHasPendingOutput(wrk)) {  in WebPRescalerImport()
119     if (wrk->y_expand) {  in WebPRescalerImport()
120       rescaler_t* const tmp = wrk->irow;  in WebPRescalerImport()
121       wrk->irow = wrk->frow;  in WebPRescalerImport()
122       wrk->frow = tmp;  in WebPRescalerImport()
124     WebPRescalerImportRow(wrk, src);  in WebPRescalerImport()
125     if (!wrk->y_expand) {     // Accumulate the contribution of the new row.  in WebPRescalerImport()
127       for (x = 0; x < wrk->num_channels * wrk->dst_width; ++x) {  in WebPRescalerImport()
128         wrk->irow[x] += wrk->frow[x];  in WebPRescalerImport()
131     ++wrk->src_y;  in WebPRescalerImport()
134     wrk->y_accum -= wrk->y_sub;  in WebPRescalerImport()