如何在Android上启用OpenGL扩展GL_EXT_shader_framebuffer_fetch? [英] How to enable OpenGL extension GL_EXT_shader_framebuffer_fetch on Android?

问题描述

我正在用OpenGL ES 2.0开发一个Android应用，我想使用

I'm developing an Android app with OpenGL ES 2.0 and I'd like to use the GL_EXT_shader_framebuffer_fetch extension.

据我了解，我需要先使用片段着色器顶部的 #extension 指令启用它，然后才能使用内置变量 gl_LastFragData .

From what I understand, I need to enable it first with the #extension directive at the top of my fragment shader, and then I can use the built-in variable gl_LastFragData.

这是我的片段着色器:

#extension GL_EXT_shader_framebuffer_fetch : require
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ <- Enable the extension

varying highp vec2 textureCoords;
uniform sampler2D currentTexture;

void main()
{
    vec4 currentColor = texture2D(currentTexture, textureCoords);
    gl_FragColor = currentColor;
}

但是，当我编译着色器时，出现以下编译错误:

However, when I compile the shader, I get the following compilation error:

Couldn't compile shader: Fragment shader compilation failed.
ERROR: 0:1: '' :     GLSL error: extension 'GL_EXT_shader_framebuffer_fetch' is not supported
ERROR: 1 compilation errors. No code generated.

错误非常明显:不支持此扩展 .

The error is pretty explicit: this extension is not supported.

我的技术规格:

• 硬件:三星Galaxy S4
• Android版本:5.0.1
• Android API级别:21
• OpenGL版本( glGetString(GL_VERSION)):OpenGL ES 3.0 V@84.0 AU @(CL @)

• Hardware: Samsung Galaxy S4
• Android version: 5.0.1
• Android API level: 21
• OpenGL version (glGetString(GL_VERSION)): OpenGL ES 3.0 V@84.0 AU@ (CL@)

我有几个问题:

• 我可以在设备上安装该扩展程序吗?
• 如果没有，我可以在模拟器上安装/使用它吗?
• 是软件问题还是真正的硬件问题?

• Is there anything I can do to install this extension on my device?
• If not, can I install it/use it on an emulator?
• Is it a software matter or really a hardware problem?

推荐答案

我可以做些什么来在设备上安装此扩展程序吗?

Is there anything I can do to install this extension on my device?

否；GPU和驱动程序支持它，或者它们不支持.

No; either the GPU and driver support it, or they don't.

如果没有，我可以在模拟器上安装/使用它吗?

If not, can I install it/use it on an emulator?

如果仿真器支持扩展名，那么可以使用它...

If the emulator supports the extension, then yes you can use it ...

是软件问题还是硬件问题?

Is it a software matter or really a hardware problem?

可能是基础硬件的限制，也可能是驱动程序的限制.从应用程序开发人员的角度来看，两者是不可分割的，因此这是无关紧要的，这实际上是限制...

Could be either a limitation in the underlying hardware, or a limitation in the driver. From an app developer point of view the two are indivisible, so it's sort of irrelevant which is the limitation really ...

这篇关于如何在Android上启用OpenGL扩展GL_EXT_shader_framebuffer_fetch?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！