add GLFW error callback function and assertion

Added a `glfwInit()` assertion because it could fail, and a callback function to get the error description and print it to stdout.

diff --git a/tests/common/vkengine.c b/tests/common/vkengine.c
index 3da99729add6166eeb8e096cec006182501f66f6..febc4845bccd531b57437ff8f1fc7b64c54b7e23 100644 (file)
--- a/tests/common/vkengine.c
+++ b/tests/common/vkengine.c
@@ -33,6 +33,10 @@ if (vkh_phyinfo_try_get_extension_properties(pi, #ext, NULL))        \
        enabledExts[enabledExtsCount++] = #ext;                                         \
 }
 
+static void glfw_error_callback(int error, const char *description) {
+       fprintf(stderr, "vkengine: GLFW error %d: %s\n", error, description);
+}
+
 VkSampleCountFlagBits getMaxUsableSampleCount(VkSampleCountFlags counts)
 {
        if (counts & VK_SAMPLE_COUNT_64_BIT) { return VK_SAMPLE_COUNT_64_BIT; }
@@ -109,7 +113,8 @@ bool instance_extension_supported (VkExtensionProperties* instanceExtProps, uint
 vk_engine_t* vkengine_create (VkPhysicalDeviceType preferedGPU, VkPresentModeKHR presentMode, uint32_t width, uint32_t height) {
        vk_engine_t* e = (vk_engine_t*)calloc(1,sizeof(vk_engine_t));
 
-       glfwInit();
+       glfwSetErrorCallback(glfw_error_callback);
+       assert (glfwInit()==GLFW_TRUE);
        assert (glfwVulkanSupported()==GLFW_TRUE);
 
        uint32_t enabledExtsCount = 0, phyCount = 0;
@@ -297,4 +302,3 @@ void vkengine_set_scroll_callback (VkEngine e, GLFWscrollfun onScroll){
 void vkengine_set_char_callback (VkEngine e, GLFWcharfun onChar){
        glfwSetCharCallback(e->window, onChar);
 }
-