Function imguiGraphInit

demo/d3d11/imguiGraph.cpp:228–275

bool imguiGraphInit(const char* fontpath, const ImguiGraphDesc* desc)
{
	imguiGraphContextInit(desc);

	for (int i = 0; i < CIRCLE_VERTS; ++i)
	{
		float a = (float)i / (float)CIRCLE_VERTS * PI * 2;
		g_circleVerts[i * 2 + 0] = cosf(a);
		g_circleVerts[i * 2 + 1] = sinf(a);
	}

	// Load font.
	FILE* fp = fopen(fontpath, "rb");
	if (!fp) return false;
	fseek(fp, 0, SEEK_END);
	int size = ftell(fp);
	fseek(fp, 0, SEEK_SET);

	unsigned char* ttfBuffer = (unsigned char*)malloc(size);
	if (!ttfBuffer)
	{
		fclose(fp);
		return false;
	}

	size_t len = fread(ttfBuffer, 1, size, fp);
	(void)len;

	fclose(fp);
	fp = 0;

	unsigned char* bmap = (unsigned char*)malloc(512 * 512);
	if (!bmap)
	{
		free(ttfBuffer);
		return false;
	}

	stbtt_BakeFontBitmap(ttfBuffer, 0, 15.0f, bmap, 512, 512, 32, 96, g_cdata);

	// can free ttf_buffer at this point
	imguiGraphFontTextureInit(bmap);

	free(ttfBuffer);
	free(bmap);

	return true;
}

void imguiGraphUpdate(const ImguiGraphDesc* desc)
{