MeowOS for HiBy R3 Pro II — 公共发布版本(历史已重置)

• 全新单提交:清除含敏感信息的旧历史(sudo 口令、内网 IP、SSH 密钥路径、热点 SSID、设备 MAC)
• 本地开发文档/测试记录/构建脚本全部移入 gitignored 的 devdocs/ 与 scripts/build/(不入库)
• 保留:MeowOS 源码(launcher/watchdog/bootmenu/meow_svcd/SDK)、项目规范文档、mips-repo
增补组件:SDK 统一日志+通知 API、meow_svcd 服务管理器、mips-repo 软件仓库
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MeowOS Dev committed 2026-08-30 01:12:34 +08:00
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/*
* meow_ui_img.c — 图片层(B1.2)。基于 stb_image(单头文件、静态编入),
* 解 PNG/JPEG/BMP → RGBA,统一最近邻缩放/居中裁方。
*/
#include "meow_ui.h"
#include "meow_ui_internal.h"
#include "stb_image.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct meow_img {
int w, h;
unsigned char *rgba; /* 4 通道 straight alpha */
};
static meow_img *img_alloc(int w, int h, unsigned char *rgba)
{
if (w <= 0 || h <= 0 || !rgba) { if (rgba) stbi_image_free(rgba); return NULL; }
meow_img *im = (meow_img *)malloc(sizeof *im);
if (!im) { stbi_image_free(rgba); return NULL; }
im->w = w; im->h = h; im->rgba = rgba;
return im;
}
meow_img *meow_img_load_mem(const void *buf, int len)
{
if (!buf || len <= 0) return NULL;
int w = 0, h = 0, c = 0;
unsigned char *p = stbi_load_from_memory((const unsigned char *)buf, len, &w, &h, &c, 4);
if (!p) return NULL;
return img_alloc(w, h, p);
}
meow_img *meow_img_load_file(const char *path)
{
if (!path) return NULL;
int w = 0, h = 0, c = 0;
unsigned char *p = stbi_load(path, &w, &h, &c, 4);
if (!p) return NULL;
return img_alloc(w, h, p);
}
void meow_img_free(meow_img *im)
{
if (!im) return;
if (im->rgba) stbi_image_free(im->rgba);
free(im);
}
int meow_img_w(meow_img *im) { return im ? im->w : 0; }
int meow_img_h(meow_img *im) { return im ? im->h : 0; }
/* 最近邻采样缩放(cover=1 居中裁方),返回 dw*dh*4 临时 RGBA 缓冲 */
static unsigned char *scale_buf(const meow_img *im, int dw, int dh, int cover)
{
if (!im || dw <= 0 || dh <= 0) return NULL;
unsigned char *out = (unsigned char *)malloc((size_t)dw * dh * 4);
if (!out) return NULL;
float s = 1.0f;
float ox = 0.0f, oy = 0.0f;
if (cover) {
float sx = (float)im->w / dw, sy = (float)im->h / dh;
s = sx > sy ? sx : sy; /* 铺满 → 可能外溢,居中裁 */
float sw = im->w / s, sh = im->h / s; /* 目标显示寸(sw×sh) */
ox = (float)(dw - sw) * 0.5f;
oy = (float)(dh - sh) * 0.5f;
if (ox < 0) ox = 0; if (oy < 0) oy = 0;
for (int dy = 0; dy < dh; dy++) {
int syi = (int)((dy + oy) / s);
if (syi < 0) syi = 0; if (syi >= im->h) syi = im->h - 1;
for (int dx = 0; dx < dw; dx++) {
int sxi = (int)((dx + ox) / s);
if (sxi < 0) sxi = 0; if (sxi >= im->w) sxi = im->w - 1;
memcpy(out + ((size_t)dy * dw + dx) * 4,
im->rgba + ((size_t)syi * im->w + sxi) * 4, 4);
}
}
} else {
for (int dy = 0; dy < dh; dy++) {
int syi = (int)((float)dy * im->h / dh);
if (syi >= im->h) syi = im->h - 1;
for (int dx = 0; dx < dw; dx++) {
int sxi = (int)((float)dx * im->w / dw);
if (sxi >= im->w) sxi = im->w - 1;
memcpy(out + ((size_t)dy * dw + dx) * 4,
im->rgba + ((size_t)syi * im->w + sxi) * 4, 4);
}
}
}
return out;
}
void meow_ui_img(int x, int y, meow_img *im)
{
if (!im) return;
meow_gfx_blit_rgba(x, y, im->w, im->h, im->rgba, 255);
}
void meow_ui_img_scaled(int x, int y, int w, int h, meow_img *im)
{
if (!im) return;
unsigned char *tmp = scale_buf(im, w, h, 0);
if (!tmp) return;
meow_gfx_blit_rgba(x, y, w, h, tmp, 255);
free(tmp);
}
void meow_ui_img_alpha(int x, int y, int w, int h, meow_img *im, int alpha)
{
if (!im) return;
unsigned char *tmp = scale_buf(im, w, h, 0);
if (!tmp) return;
meow_gfx_blit_rgba(x, y, w, h, tmp, alpha);
free(tmp);
}
void meow_ui_img_cover(int x, int y, int size, meow_img *im)
{
if (!im) return;
unsigned char *tmp = scale_buf(im, size, size, 1);
if (!tmp) return;
meow_gfx_blit_rgba(x, y, size, size, tmp, 255);
free(tmp);
}