How to convert texture2DRect to texture2D shader

beginners
#1

Hello friends… I am trying to convert texture2DRect to texture2D but it doest not work…
Currently I have a shader that works… it looks like this.

//Fragment shader 
#version 120
#extension GL_ARB_texture_rectangle : enable
#extension GL_EXT_gpu_shader4 : enable

uniform sampler2DRect texture0;

void main(){
	//Getting coordinates of the current pixel in texture
	vec2 pos = gl_TexCoord[0].xy;
	vec4 color = texture2DRect(texture0, pos);
	gl_FragColor = color;
}

//Vertex Shader
#version 120
#extension GL_ARB_texture_rectangle : enable
#extension GL_EXT_gpu_shader4 : enable

void main() {
	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
	gl_TexCoord[0] = gl_MultiTexCoord0;
	gl_FrontColor = gl_Color;
}

The above shader code works… but I am trying to convert it like this but ti doest not work.

//Fragment Shader
#version 120

uniform sampler2D texture0;
varying vec2 tex_coords;

void main() {
	vec4 color = texture2D(texture0, tex_coords);
	gl_FragColor = color;
}

//Vertex Shader
#version 120

attribute vec3 vertices;
attribute vec2 textures;

varying vec2 tex_coords;

void main() {
	tex_coords = textures;
	gl_Position = vec4(vertices, 1);
}

How to fixed this?

#2

Hi! You didn’t mention how it fails to work. Is it all black? Wrong size? Fails to compile?

The shaders in the shader/ folder can be very good to see different approaches in GLES, GL2 and GL3:


You can find them inside each example in the bin/data folder.

#3

to use texture2d instead of texture2drect you need to call ofDisableArbTex() first thing in your setup so all the textures in your program are created as 2d instead of rectangular textures

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