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initial support for WebP images

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Vincent Wei
2021-10-20 12:09:40 +08:00
parent b59ed4b7d1
commit 7cefc7d5ab
2 changed files with 80 additions and 23 deletions
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Version.md
+2 -2
View File
@@ -1,6 +1,6 @@
Version 5.0.7 (2021/06/30)
Version 5.0.8 (2021/10/25)
This is a bugfix release of MiniGUI 5.0.x, the stable version.
This is a minor enhancement and bugfix release of MiniGUI 5.0.x, the stable version.
Other packages for MiniGUI resource, tools, components, and samples:
src/mybmp/webp.c
+78 -21
View File
@@ -71,7 +71,7 @@
struct webp_decode_info {
WebPDecoderConfig config;
size_t sz_data;
char buf[READ_BUFF_SIZE];
char data[READ_BUFF_SIZE];
};
void* __mg_init_webp(MG_RWops *fp, MYBITMAP *mybmp, RGB *pal)
@@ -99,14 +99,14 @@ void* __mg_init_webp(MG_RWops *fp, MYBITMAP *mybmp, RGB *pal)
goto error;
}
n = MGUI_RWread(fp, info->buf + info->sz_data, 1, HEADER_CHUNK_SIZE);
n = MGUI_RWread(fp, info->data + info->sz_data, 1, HEADER_CHUNK_SIZE);
if (n > 0) {
info->sz_data += n;
}
else
goto error;
sc = WebPGetFeatures(info->buf, info->sz_data, &info->config.input);
sc = WebPGetFeatures(info->data, info->sz_data, &info->config.input);
if (sc == VP8_STATUS_OK) {
break;
}
@@ -124,6 +124,18 @@ void* __mg_init_webp(MG_RWops *fp, MYBITMAP *mybmp, RGB *pal)
goto error;
}
#if SIZEOF_PTR == 8
info->config.options.no_fancy_upsampling = 0;
/* use default
info->config.options.dithering_strength = 100; */
/* use default
info->config.options.alpha_dithering_strength = 100; */
#else
info->config.options.no_fancy_upsampling = 1;
info->config.options.dithering_strength = 67;
info->config.options.alpha_dithering_strength = 33;
#endif
mybmp->w = info->config.input.width;
mybmp->h = info->config.input.height;
mybmp->frames = 1;
@@ -140,24 +152,14 @@ void* __mg_init_webp(MG_RWops *fp, MYBITMAP *mybmp, RGB *pal)
info->config.output.colorspace = MODE_RGB;
mybmp->depth = 24;
mybmp->flags |= MYBMP_FLOW_DOWN | MYBMP_ALPHA | MYBMP_TYPE_RGBA;
mybmp->flags |= MYBMP_RGBSIZE_4;
mybmp->flags |= MYBMP_FLOW_DOWN | MYBMP_TYPE_RGB;
mybmp->flags |= MYBMP_RGBSIZE_3;
pitch = (size_t)info->config.input.width * 3;
}
pitch = ROUND_TO_MULTIPLE(pitch, 8);
// Have config.output point to an external buffer:
info->config.output.u.RGBA.rgba = (uint8_t*)malloc(pitch);
info->config.output.u.RGBA.stride = pitch;
info->config.output.u.RGBA.size = pitch;
info->config.output.is_external_memory = 1;
if (info->config.output.u.RGBA.rgba == NULL) {
_ERR_PRINTF ("__mg_init_webp: failed to allocate memory\n");
goto error;
}
mybmp->pitch = pitch;
return info;
@@ -177,19 +179,74 @@ void __mg_cleanup_webp(void *init_info)
}
}
int __mg_load_webp(MG_RWops *fp, void *init_info, MYBITMAP *my_bmp,
int __mg_load_webp(MG_RWops *fp, void *init_info, MYBITMAP *mybmp,
CB_ONE_SCANLINE cb, void *context)
{
return ERR_BMP_OK;
int rc = ERR_BMP_OK;
struct webp_decode_info *info = init_info;
WebPIDecoder* idec = NULL;
// 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;
idec = WebPINewDecoder(&info->config.output);
if (idec == NULL) {
rc = ERR_BMP_MEM;
goto ret;
}
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) {
rc = ERR_BMP_LOAD;
break;
}
if (WebPIDecGetRGB(idec, &last_y, NULL, NULL, NULL) && cb &&
last_y > last_last_y) {
int y;
for (y = last_last_y + 1; y <= last_y; y++) {
cb(context, mybmp, y);
}
last_last_y = last_y;
}
/* read more data */
n = MGUI_RWread(fp, info->data, 1, sizeof(info->data));
if (n > 0) {
info->sz_data = n;
}
else if (n == 0) {
break;
}
else {
rc = ERR_BMP_LOAD;
break;
}
}
ret:
if (idec)
WebPIDelete(idec);
WebPFreeDecBuffer(&info->config.output);
return rc;
}
BOOL __mg_check_webp(MG_RWops* fp)
{
unsigned char header[RIFF_HEADER_SIZE];
MGUI_RWread(fp, header, RIFF_HEADER_SIZE, 1);
if (!WebPGetInfo(header, RIFF_HEADER_SIZE, NULL, NULL)) {
}
if (MGUI_RWread(fp, header, 1, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
return FALSE;
return WebPGetInfo(header, RIFF_HEADER_SIZE, NULL, NULL);
}