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support for WebP is ready now (animation not supported)

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Vincent Wei
2021-10-20 16:22:26 +08:00
parent e2d2544ce6
commit 40f53732ff
1 changed files with 27 additions and 9 deletions
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36
src/mybmp/webp.c
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@@ -65,7 +65,7 @@
#define RIFF_HEADER_SIZE 12
#define HEADER_CHUNK_SIZE 64
#define HEADER_CHUNK_SIZE 32
#define READ_BUFF_SIZE 1024
struct webp_decode_info {
@@ -161,6 +161,8 @@ void* __mg_init_webp(MG_RWops *fp, MYBITMAP *mybmp, RGB *pal)
pitch = ROUND_TO_MULTIPLE(pitch, 8);
mybmp->pitch = pitch;
info->config.output.width = info->config.input.width;
info->config.output.height = info->config.input.height;
return info;
error:
@@ -174,7 +176,6 @@ void __mg_cleanup_webp(void *init_info)
struct webp_decode_info *info = init_info;
if (info) {
free(info->config.output.u.RGBA.rgba);
free(info);
}
}
@@ -185,12 +186,20 @@ int __mg_load_webp(MG_RWops *fp, void *init_info, MYBITMAP *mybmp,
int rc = ERR_BMP_OK;
struct webp_decode_info *info = init_info;
WebPIDecoder* idec = NULL;
int last_last_y = -1, last_y;
// Have config.output point to an external buffer:
info->config.output.u.RGBA.rgba = (uint8_t*)mybmp->bits;
info->config.output.u.RGBA.stride = mybmp->pitch;
info->config.output.u.RGBA.size = mybmp->pitch * mybmp->h;
info->config.output.is_external_memory = 1;
if (mybmp->flags & MYBMP_LOAD_ALLOCATE_ONE) {
info->config.output.u.RGBA.stride = mybmp->pitch;
info->config.output.u.RGBA.size = mybmp->pitch * mybmp->h;
mybmp->bits = realloc(mybmp->bits, info->config.output.u.RGBA.size);
}
else {
info->config.output.u.RGBA.stride = mybmp->pitch;
info->config.output.u.RGBA.size = mybmp->pitch * mybmp->h;
}
info->config.output.u.RGBA.rgba = (uint8_t*)mybmp->bits;
idec = WebPINewDecoder(&info->config.output);
if (idec == NULL) {
@@ -199,21 +208,27 @@ int __mg_load_webp(MG_RWops *fp, void *init_info, MYBITMAP *mybmp,
}
while (1) {
int last_last_y = -1, last_y;
int n;
VP8StatusCode status = WebPIAppend(idec, info->data, info->sz_data);
if (status != VP8_STATUS_OK && status != VP8_STATUS_SUSPENDED) {
_ERR_PRINTF ("__mg_load_webp: WebPIAppend failed: %d\n", status);
rc = ERR_BMP_LOAD;
break;
}
if (WebPIDecGetRGB(idec, &last_y, NULL, NULL, NULL) && cb &&
last_y > last_last_y) {
if (WebPIDecGetRGB(idec, &last_y, NULL, NULL, NULL) &&
(--last_y > last_last_y)) {
int y;
for (y = last_last_y + 1; y <= last_y; y++) {
cb(context, mybmp, y);
if (mybmp->flags & MYBMP_LOAD_ALLOCATE_ONE) {
mybmp->bits = info->config.output.u.RGBA.rgba;
mybmp->bits += mybmp->pitch * y;
}
if (cb)
cb(context, mybmp, y);
}
last_last_y = last_y;
@@ -228,11 +243,14 @@ int __mg_load_webp(MG_RWops *fp, void *init_info, MYBITMAP *mybmp,
break;
}
else {
_ERR_PRINTF ("__mg_load_webp: MGUI_RWread failed: %d\n", n);
rc = ERR_BMP_LOAD;
break;
}
}
mybmp->bits = info->config.output.u.RGBA.rgba;
ret:
if (idec)
WebPIDelete(idec);