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‎.github/workflows/test-opencvsharp.yml‎

Lines changed: 79 additions & 55 deletions
Original file line numberDiff line numberDiff line change
@@ -40,72 +40,96 @@ jobs:
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- name: Create test.c
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run: |
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mkdir test && cd test
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cat > test.c << 'EOF'
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mkdir -p test
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cat > test/test.c <<'EOF'
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#include <stdio.h>
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#include <stdint.h>
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/* ========== OpenCvSharpExtern exported C prototypes ========== */
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typedef struct Mat Mat;
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typedef struct { double val[4]; } Scalar;
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typedef struct { int x; int y; } Point;
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#include <assert.h>
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/* ==== 简易类型 / 宏定义 ==== */
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typedef long long uint64; /* 对应 C# 的 UInt64 */
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typedef int ExceptionStatus; /* OpenCvSharpExtern 约定：0 = OK */
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typedef struct { double val[4]; } MyCvScalar;
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typedef struct cv_Mat cv_Mat; /* 不需要知道内部实现 */
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/* OpenCV 常量（直接抄一份足够用即可） */
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#define CV_8UC3 16 /* 8-bit unsigned, 3 channels */
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#define IMWRITE_JPEG_QUALITY 1
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/* ==== C API 声明 ==== */
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/* core */
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int core_Mat_sizeof(void);
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Mat* core_Mat_new2(int rows, int cols, int type);
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void core_Mat_delete(Mat* mat);
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uint8_t* core_Mat_data(Mat* mat);
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int core_Mat_rows(Mat* mat);
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int core_Mat_cols(Mat* mat);
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int core_Mat_type(Mat* mat);
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extern uint64 core_Mat_sizeof(void);
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extern ExceptionStatus core_Mat_new3(int rows,int cols,int type,
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MyCvScalar scalar, cv_Mat **returnValue);
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extern ExceptionStatus core_Mat_delete(cv_Mat *self);
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/* imgcodecs */
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int imgcodecs_imwrite(const char* fileName, Mat* mat,
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const int* params, int paramsLength);
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/* ========== Convenience macro (same数值和 OpenCV 保持一致) ========== */
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#define CV_8U 0
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#define CV_CN_SHIFT 3
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#define CV_MAKETYPE(depth, cn) ( (depth) + ( (cn - 1) << CV_CN_SHIFT ) )
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#define CV_8UC3 CV_MAKETYPE(CV_8U,3)
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extern ExceptionStatus imgcodecs_imwrite(const char *filename, cv_Mat *img,
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int *params,int paramsLength,int *returnValue);
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extern ExceptionStatus imgcodecs_imread (const char *filename,int flags,
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cv_Mat **returnValue);
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/* ==== 帮助函数：检查返回值 ==== */
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static void CHECK_OK(ExceptionStatus st, const char *msg)
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{
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if(st != 0) { fprintf(stderr,"%s failed: %d\n", msg, st); exit(st); }
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}
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static void CHECK_BOOL(int ok, const char *msg)
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{
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if(!ok) { fprintf(stderr,"%s returned false\n", msg); exit(1); }
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}
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int main(void)
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{
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printf("sizeof(cv::Mat) reported by core_Mat_sizeof = %d bytes\n",
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core_Mat_sizeof());
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/* 1. 创建 100×100×3 uchar 图像 */
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Mat* img = core_Mat_new2(100, 100, CV_8UC3);
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if (!img) {
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fprintf(stderr, "core_Mat_new2 failed\n");
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return 1;
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}
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/* 2. 填充像素：让 B=行, G=列, R=(行+列)/2 */
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uint8_t* data = core_Mat_data(img);
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int rows = core_Mat_rows(img);
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int cols = core_Mat_cols(img);
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for (int r = 0; r < rows; ++r) {
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for (int c = 0; c < cols; ++c) {
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int idx = (r * cols + c) * 3;
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data[idx + 0] = (uint8_t)r; /* B */
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data[idx + 1] = (uint8_t)c; /* G */
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data[idx + 2] = (uint8_t)((r + c) >> 1); /* R */
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printf("sizeof(Mat) reported by native = %llu\n",
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(unsigned long long)core_Mat_sizeof());
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/* 1. 先创建一张 256×256、彩色渐变图像 ----------------------------- */
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cv_Mat *img = NULL;
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MyCvScalar black = {0};
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CHECK_OK(core_Mat_new3(256, 256, CV_8UC3, black, &img), "core_Mat_new3");
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/* 通过指针手动绘制一个 BGR 渐变：B = x, G = y, R = 128 */
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unsigned char *data = NULL;
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extern ExceptionStatus core_Mat_data(cv_Mat *self, unsigned char **returnValue);
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CHECK_OK(core_Mat_data(img, &data), "core_Mat_data");
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for(int y = 0; y < 256; ++y)
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{
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for(int x = 0; x < 256; ++x)
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{
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unsigned char *pix = data + (y*256 + x)*3;
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pix[0] = (unsigned char)x; /* Blue 渐变 */
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pix[1] = (unsigned char)y; /* Green 渐变 */
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pix[2] = 128; /* Red 固定 */
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}
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}
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/* 3. 写入 PNG 文件 */
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const char* outName = "test-output.png";
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int ok = imgcodecs_imwrite(outName, img, NULL, 0);
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printf("imgcodecs_imwrite(\"%s\") returned %d\n", outName, ok);
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/* 4. 清理 */
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/* 2. 保存为 PNG -------------------------------------------------- */
107+
int ok = 0;
108+
CHECK_OK(imgcodecs_imwrite("test.png", img, NULL, 0, &ok), "imwrite PNG");
109+
CHECK_BOOL(ok, "imwrite PNG");
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/* 3. 读取刚写出的 PNG ------------------------------------------- */
112+
cv_Mat *img2 = NULL;
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CHECK_OK(imgcodecs_imread("test.png", /*flags=*/1, &img2), "imread PNG");
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/* 不需要检查 NULL，因为 C API 出错会抛异常，已在上一步捕获 */
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/* 4. 以 JPEG 质量 90 再保存为 JPG -------------------------------- */
117+
int jpegParams[2] = { IMWRITE_JPEG_QUALITY, 90 };
118+
CHECK_OK(imgcodecs_imwrite("test.jpg", img2,
119+
jpegParams, 2, &ok), "imwrite JPG");
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CHECK_BOOL(ok, "imwrite JPG");
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printf("PNG and JPG written successfully.\n");
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/* 5. 释放资源 ---------------------------------------------------- */
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core_Mat_delete(img);
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return ok ? 0 : 1;
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core_Mat_delete(img2);
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128+
return 0;
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}
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EOF
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cat test.c
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cat test/test.c
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- name: Setup MSVC(Windows only)
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uses: ilammy/msvc-dev-cmd@v1
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if: startsWith(matrix.os, 'win')

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