在Libgdx/Lwjgl中，加载生成的纹理数据尚无定论

本文介绍了在Libgdx/Lwjgl中，加载生成的纹理数据尚无定论的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

以下数据格式:

final int width = 256;
final int height = 256;
final float[][][] data = new float[width][height][4];
FloatBuffer dataBuf;
int textureHandle;
FrameBuffer testFrame;
@Override
public void create () {
    for (int i = 0; i < width; i++) {
        for (int j = 0; j < height; j++) {
            data[i][j][0] = 0.4f; /* r */
            data[i][j][1] = 0.38f; /* g */
            data[i][j][2] = 0.2f; /* b */
            data[i][j][3] = 0.9f; /* a */
        }
    }
    dataBuf = ByteBuffer.allocateDirect( Float.BYTES * 4 * width * height ).asFloatBuffer();
    for (float[][] dat : data) { /* Float Byte size * RGBA * width * height */
        for (float[] floats : dat) {
            dataBuf.put(floats, 0, 4);
        }
    }
    dataBuf.position(0); /* reset the caret position to the beginning of the array */
    textureHandle = Gdx.gl.glGenTexture();
    Gdx.gl.glActiveTexture(GL20.GL_TEXTURE1);
    Gdx.gl.glBindTexture(GL30.GL_TEXTURE_2D, textureHandle);
    Gdx.gl.glTexParameteri(GL30.GL_TEXTURE_2D, GL30.GL_TEXTURE_MIN_FILTER, GL30.GL_NEAREST);
    Gdx.gl.glTexParameteri(GL30.GL_TEXTURE_2D, GL30.GL_TEXTURE_MAG_FILTER, GL30.GL_LINEAR);
    Gdx.gl.glTexImage2D(
        GL30.GL_TEXTURE_2D, 0, GL30.GL_RGBA32F,
        width, height, 0, GL30.GL_RGBA, GL30.GL_FLOAT, dataBuf
    );
}

着色器的行为正确，因为它们已使用Framebuffer对象进行了测试，并且显示了Framebuffers的正确内容.

The Shaders are behaving correctly, as they were tested with Framebuffer objects, and they display the correct contents of the Framebuffers.

但是，当渲染生成的纹理时，它似乎偏离了原始颜色/值.在大多数情况下， FloatBuffers 提供的值会导致黑色纹理，有时会出现意想不到的颜色(例如，用石灰绿色代替米色).

However when the generated texture is rendered, it seems to deviate from the original color/value.In most cases the values provided by the FloatBuffers result in a black texture, sometimes there is an unexpected color(e.g. lime-green instead of beige).

不幸的是，我无法使用 glPixelStorei 太多，因为该接口缺少其大部分参数.但是无论如何， glGetError 总是返回0，所以我怀疑数据以某种方式被错误地编译到了 dataBuf 字节流中.

Unfortunately I couldn't play with glPixelStorei much, because the interface is missing most of its parameters. But in any case glGetError is always returning with 0, so I suspect the data is somehow incorrectly compiled into the dataBuf byte-stream.

这里可能是什么问题?

一些调试详细信息:

glGetError()始终为零
各个组件似乎对数据有一个粗略的概念，但是大多数值会产生黑色纹理:
- r:1.0f，g:1.0f，b:1.0f，a:1.0f->黑屏
- r:0.0f，g:0.0f，b:0.9f，a:0.9f -->蓝屏
- r:0.4f，g:0.32f，b:0.2f，a:0.9f -->绿屏
- glGetError() is always zero
- the individual components seem to have a rough idea of the data, but most of the values produce a black texture:
  - r: 1.0f, g: 1.0f, b: 1.0f, a: 1.0f --> black screen
  - r: 0.9f, g: 0.9f, b: 0.9f, a: 0.9f --> white screen
  - r: 0.9f, g: 0.0f, b: 0.0f, a: 0.9f --> red screen
  - r: 0.0f, g: 0.9f, b: 0.0f, a: 0.9f --> green screen
  - r: 0.0f, g: 0.0f, b: 0.9f, a: 0.9f --> blue screen
  - r: 0.5f, g: 0.5f, b: 0.5f, a: 0.5f --> black screen
  - r: 0.4f, g: 0.32f, b: 0.2f, a: 0.9f --> green screen
```
        dataBuf.position(0);
        Gdx.gl.glTexImage2D(
            GL30.GL_TEXTURE_2D, 0, GL30.GL_RGBA,
            width, height, 0, GL30.GL_RGBA, GL30.GL_UNSIGNED_INT, dataBuf
        );
```
  - LWJGL3后端存在相同的行为

9f

在Libgdx/Lwjgl中，加载生成的纹理数据尚无定论

问题描述

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