dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-18 23:09:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add libwebp/src/mux/animi.h

Browse Source 
Change-Id: I80ca2070d419acf6e8355a295ee965d2df5a4d8f
This commit is contained in:
hui su
2016-10-03 14:40:51 -07:00
parent 28ce304344
commit 68ae5b671f
4 changed files with 79 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/mux/anim_encode.c
View File

@ -16,6 +16,7 @@
#include <stdio.h>
#include <stdlib.h> // for abs()
#include "../mux/animi.h"
#include "../utils/utils.h"
#include "../webp/decode.h"
#include "../webp/encode.h"
@ -586,6 +587,39 @@ static int GetSubRects(const WebPPicture* const prev_canvas,
&params->rect_lossy_, &params->sub_frame_lossy_);
}
static WEBP_INLINE int clip(int v, int min_v, int max_v) {
return (v < min_v) ? min_v : (v > max_v) ? max_v : v;
}
int WebPAnimEncoderRefineRect(
const WebPPicture* const prev_canvas, const WebPPicture* const curr_canvas,
int is_lossless, float quality, int* const x_offset, int* const y_offset,
int* const width, int* const height) {
FrameRect rect;
const int right = clip(*x_offset + *width, 0, curr_canvas->width);
const int left = clip(*x_offset, 0, curr_canvas->width - 1);
const int bottom = clip(*y_offset + *height, 0, curr_canvas->height);
const int top = clip(*y_offset, 0, curr_canvas->height - 1);
if (prev_canvas == NULL || curr_canvas == NULL ||
prev_canvas->width != curr_canvas->width ||
prev_canvas->height != curr_canvas->height ||
!prev_canvas->use_argb || !curr_canvas->use_argb) {
return 0;
}
rect.x_offset_ = left;
rect.y_offset_ = top;
rect.width_ = clip(right - left, 0, curr_canvas->width - rect.x_offset_);
rect.height_ = clip(bottom - top, 0, curr_canvas->height - rect.y_offset_);
MinimizeChangeRectangle(prev_canvas, curr_canvas, &rect, is_lossless,
quality);
SnapToEvenOffsets(&rect);
*x_offset = rect.x_offset_;
*y_offset = rect.y_offset_;
*width = rect.width_;
*height = rect.height_;
return 1;
}
static void DisposeFrameRectangle(int dispose_method,
const FrameRect* const rect,
WebPPicture* const curr_canvas) {