使用 DevIl 库加载纹理时出现问题
我正在使用 DevIl 库并尝试使用它将纹理加载到 OpenGL 以应用于精灵。该代码直接来自《严肃游戏设计的 C# 游戏编程》一书(如果有帮助的话)。我遇到的问题是 Il.ilLoadImage 调用。即使我将其传递为空,它也不会抛出图像未找到错误,并且当表单弹出时,精灵只会显示深灰色(而不是白色)。
public void LoadTexture(string textureId, string path)
{
int devilId = 0;
Il.ilGenImages(1, out devilId);
Il.ilBindImage(devilId);
if (!Il.ilLoadImage(path))
{
System.Diagnostics.Debug.Assert(false, "Could not open file [" + path + "].");
}
//Flip the files before passing them to OpenGl
Ilu.iluFlipImage();
int width = Il.ilGetInteger(Il.IL_IMAGE_WIDTH);
int height = Il.ilGetInteger(Il.IL_IMAGE_HEIGHT);
int openGLId = Ilut.ilutGLBindTexImage();
System.Diagnostics.Debug.Assert(openGLId != 0);
Il.ilDeleteImages(1, ref devilId);
_textureDatabase.Add(textureId, new Texture(openGLId, width, height));
}
I am working with the DevIl library and trying to use it to load a texture to OpenGL to apply to a sprite. The code is directly out of the C# Game Programming for Serious Game Design book (if that helps). The problem I'm having is with the Il.ilLoadImage call. Even when I pass it null, it doesn't throw an image not found error, and the sprite just shows up dark grey (instead of white) when the form pops up.
public void LoadTexture(string textureId, string path)
{
int devilId = 0;
Il.ilGenImages(1, out devilId);
Il.ilBindImage(devilId);
if (!Il.ilLoadImage(path))
{
System.Diagnostics.Debug.Assert(false, "Could not open file [" + path + "].");
}
//Flip the files before passing them to OpenGl
Ilu.iluFlipImage();
int width = Il.ilGetInteger(Il.IL_IMAGE_WIDTH);
int height = Il.ilGetInteger(Il.IL_IMAGE_HEIGHT);
int openGLId = Ilut.ilutGLBindTexImage();
System.Diagnostics.Debug.Assert(openGLId != 0);
Il.ilDeleteImages(1, ref devilId);
_textureDatabase.Add(textureId, new Texture(openGLId, width, height));
}
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相当荒谬的是,DevIL 基于 OpenGL 的 API 和一般结构。因此,报告错误的典型方式是使用
ilGetError
。如果你想确定某个函数是否成功,你应该使用它。DevIL is, rather nonsensically, based on OpenGL's API and general structure. As such, the typical way that errors are reported is with
ilGetError
. If you want to make sure a function succeeded or not, you should use that.