70 void WebPCleanupTransparentArea(WebPPicture* pic) {  in WebPCleanupTransparentArea()  argument
72   if (pic == NULL) return;  in WebPCleanupTransparentArea()
73   w = pic->width / SIZE;  in WebPCleanupTransparentArea()
74   h = pic->height / SIZE;  in WebPCleanupTransparentArea()
77   if (pic->use_argb) {  in WebPCleanupTransparentArea()
82         const int off = (y * pic->argb_stride + x) * SIZE;  in WebPCleanupTransparentArea()
83         if (is_transparent_argb_area(pic->argb + off, pic->argb_stride, SIZE)) {  in WebPCleanupTransparentArea()
85             argb_value = pic->argb[off];  in WebPCleanupTransparentArea()
88           flatten_argb(pic->argb + off, argb_value, pic->argb_stride, SIZE);  in WebPCleanupTransparentArea()
95     const uint8_t* const a_ptr = pic->a;  in WebPCleanupTransparentArea()
101         const int off_a = (y * pic->a_stride + x) * SIZE;  in WebPCleanupTransparentArea()
102         const int off_y = (y * pic->y_stride + x) * SIZE;  in WebPCleanupTransparentArea()
103         const int off_uv = (y * pic->uv_stride + x) * SIZE2;  in WebPCleanupTransparentArea()
104         if (is_transparent_area(a_ptr + off_a, pic->a_stride, SIZE)) {  in WebPCleanupTransparentArea()
106             values[0] = pic->y[off_y];  in WebPCleanupTransparentArea()
107             values[1] = pic->u[off_uv];  in WebPCleanupTransparentArea()
108             values[2] = pic->v[off_uv];  in WebPCleanupTransparentArea()
111           flatten(pic->y + off_y, values[0], pic->y_stride, SIZE);  in WebPCleanupTransparentArea()
112           flatten(pic->u + off_uv, values[1], pic->uv_stride, SIZE2);  in WebPCleanupTransparentArea()
113           flatten(pic->v + off_uv, values[2], pic->uv_stride, SIZE2);  in WebPCleanupTransparentArea()
125 void WebPCleanupTransparentAreaLossless(WebPPicture* const pic) {  in WebPCleanupTransparentAreaLossless()  argument
128   assert(pic != NULL && pic->use_argb);  in WebPCleanupTransparentAreaLossless()
129   w = pic->width;  in WebPCleanupTransparentAreaLossless()
130   h = pic->height;  in WebPCleanupTransparentAreaLossless()
131   argb = pic->argb;  in WebPCleanupTransparentAreaLossless()
139     argb += pic->argb_stride;  in WebPCleanupTransparentAreaLossless()
151 void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb) {  in WebPBlendAlpha()  argument
156   if (pic == NULL) return;  in WebPBlendAlpha()
157   if (!pic->use_argb) {  in WebPBlendAlpha()
158     const int uv_width = (pic->width >> 1);  // omit last pixel during u/v loop  in WebPBlendAlpha()
163     const int has_alpha = pic->colorspace & WEBP_CSP_ALPHA_BIT;  in WebPBlendAlpha()
164     if (!has_alpha || pic->a == NULL) return;    // nothing to do  in WebPBlendAlpha()
165     for (y = 0; y < pic->height; ++y) {  in WebPBlendAlpha()
167       uint8_t* const y_ptr = pic->y + y * pic->y_stride;  in WebPBlendAlpha()
168       uint8_t* const a_ptr = pic->a + y * pic->a_stride;  in WebPBlendAlpha()
169       for (x = 0; x < pic->width; ++x) {  in WebPBlendAlpha()
177         uint8_t* const u = pic->u + (y >> 1) * pic->uv_stride;  in WebPBlendAlpha()
178         uint8_t* const v = pic->v + (y >> 1) * pic->uv_stride;  in WebPBlendAlpha()
180             (y + 1 == pic->height) ? a_ptr : a_ptr + pic->a_stride;  in WebPBlendAlpha()
190         if (pic->width & 1) {   // rightmost pixel  in WebPBlendAlpha()
196       memset(a_ptr, 0xff, pic->width);  in WebPBlendAlpha()
199     uint32_t* argb = pic->argb;  in WebPBlendAlpha()
201     for (y = 0; y < pic->height; ++y) {  in WebPBlendAlpha()
202       for (x = 0; x < pic->width; ++x) {  in WebPBlendAlpha()
218       argb += pic->argb_stride;  in WebPBlendAlpha()