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Add elf-dlopen-note test

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This commit is contained in:
Anonymous Maarten
2025-10-11 02:08:18 +02:00
committed by Sam Lantinga
parent 3955f19373
commit 281ac6c3bb
2 changed files with 78 additions and 0 deletions
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1
test/CMakeLists.txt
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@@ -356,6 +356,7 @@ add_sdl_test_executable(testaudio MAIN_CALLBACKS NEEDS_RESOURCES TESTUTILS SOURC
add_sdl_test_executable(testcolorspace SOURCES testcolorspace.c)
add_sdl_test_executable(testfile NONINTERACTIVE SOURCES testfile.c)
add_sdl_test_executable(testcontroller TESTUTILS SOURCES testcontroller.c gamepadutils.c ${gamepad_image_headers} DEPENDS generate-gamepad_image_headers)
add_sdl_test_executable(testdlopennote TESTUTILS SOURCES testdlopennote.c)
add_sdl_test_executable(testgeometry TESTUTILS SOURCES testgeometry.c)
add_sdl_test_executable(testgl SOURCES testgl.c)
add_sdl_test_executable(testgles SOURCES testgles.c)

77
test/testdlopennote.c Normal file
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@@ -0,0 +1,77 @@
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
#ifdef SDL_PLATFORM_WINDOWS
#define PNG_SHARED_LIBRARY "libpng16-16.dll"
#elif defined(SDL_PLATFORM_APPLE)
#define PNG_SHARED_LIBRARY "libpng16.16.dylib"
#else
#define PNG_SHARED_LIBRARY "libpng16.so.16"
#endif
SDL_ELF_NOTE_DLOPEN(
"png",
"Support for loading PNG images using libpng",
SDL_ELF_NOTE_DLOPEN_PRIORITY_RECOMMENDED,
PNG_SHARED_LIBRARY
);
typedef int png_sig_cmp_fn(const unsigned char *sig, size_t start, size_t num_to_check);
static struct {
SDL_SharedObject *library;
png_sig_cmp_fn *png_sig_cmp;
} libpng16;
static bool libpng_init(void)
{
libpng16.library = SDL_LoadObject(PNG_SHARED_LIBRARY);
if (!libpng16.library) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to load libpng library \"" PNG_SHARED_LIBRARY "\"");
return false;
}
libpng16.png_sig_cmp = (png_sig_cmp_fn *)SDL_LoadFunction(libpng16.library, "png_sig_cmp");
return libpng16.png_sig_cmp != NULL;
}
static void libpng_quit(void)
{
SDL_UnloadObject(libpng16.library);
SDL_zero(libpng16);
}
static bool is_png(const char *path)
{
unsigned char header[8];
size_t count;
bool result;
SDL_IOStream *io = SDL_IOFromFile(path, "rb");
if (io == NULL) {
return false;
}
count = SDL_ReadIO(io, header, sizeof(header));
result = libpng16.png_sig_cmp(header, 0, count) == 0;
SDL_CloseIO(io);
return result;
}
int main(int argc, char *argv[])
{
int i;
/* Enable standard application logging */
SDL_SetLogPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
if (argc < 2) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Usage: %s IMAGE [IMAGE [IMAGE ... ]]", argv[0]);
return 1;
}
if (!libpng_init()) {
return 1;
}
for (i = 1; i < argc; i++) {
SDL_Log("\"%s\" is a png: %s", argv[i], is_png(argv[i]) ? "YES" : "NO");
}
libpng_quit();
return 0;
}