OpenGL显示yuyv422格式图像

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已于 2023-11-10 14:49:36 修改

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文章标签： c++ 图形渲染

于 2023-11-10 14:43:18 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_44379698/article/details/134332029

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OpenGL显示yuyv422格式图像

下面介绍OpenGL显示yuyv422格式图片，如何处理顶点着色器、片元着色器，计算系数，添加纹理。

顶点着色器

#version 330 core

uniform float xScal;
uniform mat4 transLation;
layout (location = 0) in vec3 aPos;// 位置变量的属性位置值为 0 
layout (location = 1) in vec2 aTexCoord;// 颜色变量的属性位置值为 1
out vec2 textureOut;

void main(void)
{
   
	gl_Position = transLation * vec4(aPos.x * xScal, aPos.y * xScal, aPos.z, 1.0);
	textureOut = aTexCoord;
}

片元着色器

#version 330 core

uniform sampler2D tex_yuv_rg;
uniform sampler2D tex_yuv_rgba;
uniform mat3 cspmat;
uniform vec3 cspconst;
in vec2 textureOut;

void main(void)
{
   
	vec3 rgb;
	vec3 yuv;
	yuv.r = texture2D(tex_yuv_rg, textureOut).r;
	yuv.g = texture2D(tex_yuv_rgba, textureOut).g;
	yuv.b = texture2D(tex_yuv_rgba, textureOut).a;
	rgb = yuv*cspmat+cspconst;
	gl_FragColor=vec4(rgb,1.0);
}

添加纹理

 glGenVertexArrays(1, &VAO);
    glGenBuffers(1, &VBO);

    glBindVertexArray(VAO);

    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER,