Effects for GLSL 1.20 (ports for older GPUs)

[Deleted user]

Is it possible port some official Olive effects for older OpenGL?

For example, "Toonify" (built-in effect)

• https://github.com/olive-editor/olive/blob/master/effects/shaders/toonify.frag
• https://github.com/olive-editor/olive/blob/master/effects/shaders/toonify.xml

It not work for me; here is terminal output:

...
2019-04-11T13:18:37 [INFO] Vertex shader added successfully
2019-04-11T13:18:37 [WARNING] QOpenGLShader::compile(Fragment): 0:1(10): error: GLSL 1.50 is not supported. Supported versions are: 1.10, 1.20, and 1.00 ES

2019-04-11T13:18:37 [WARNING] *** Problematic Fragment shader source code ***
#version 150
#define lowp
#define mediump
#define highp
#line 1
uniform sampler2D tex0;
in vec2 vTexCoord;
out vec4 FragColor;

uniform float colors; // 12.0
uniform float sat_levels; // 4.0
uniform float bri_levels; // 4.0
uniform float edge_thres; // 0.2;
uniform float edge_thres2; // 5.0;

vec3 RGBtoHSV( float r, float g, float b) 
{
	 float minv, maxv, delta;
	 vec3 res;

	 minv = min(min(r, g), b);
	 maxv = max(max(r, g), b);
	 res.z = maxv;            // v
	 
	 delta = maxv - minv;

	 if( maxv != 0.0 )
			res.y = delta / maxv;      // s
	 else {
			// r = g = b = 0      // s = 0, v is undefined
			res.y = 0.0;
			res.x = -1.0;
			return res;
	 }

	 if( r == maxv )
			res.x = ( g - b ) / delta;      // between yellow & magenta
	 else if( g == maxv )
			res.x = 2.0 + ( b - r ) / delta;   // between cyan & yellow
	 else
			res.x = 4.0 + ( r - g ) / delta;   // between magenta & cyan

	 res.x = res.x * 60.0;            // degrees
	 if( res.x < 0.0 )
			res.x = res.x + 360.0;
			
	 return res;
}

vec3 HSVtoRGB(float h, float s, float v ) 
{
	 int i;
	 float f, p, q, t;
	 vec3 res;

	 if( s == 0.0 ) 
	 {
			// achromatic (grey)
			res.x = v;
			res.y = v;
			res.z = v;
			return res;
	 }

	 h /= 60.0;         // sector 0 to 5
	 i = int(floor( h ));
	 f = h - float(i);         // factorial part of h
	 p = v * ( 1.0 - s );
	 q = v * ( 1.0 - s * f );
	 t = v * ( 1.0 - s * ( 1.0 - f ) );

	 switch(i) 
	 {
			case 0:
				 res.x = v;
				 res.y = t;
				 res.z = p;
				 break;
			case 1:
				 res.x = q;
				 res.y = v;
				 res.z = p;
				 break;
			case 2:
				 res.x = p;
				 res.y = v;
				 res.z = t;
				 break;
			case 3:
				 res.x = p;
				 res.y = q;
				 res.z = v;
				 break;
			case 4:
				 res.x = t;
				 res.y = p;
				 res.z = v;
				 break;
			default:      // case 5:
				 res.x = v;
				 res.y = p;
				 res.z = q;
				 break;
	 }
	 return res;
}

// averaged pixel intensity from 3 color channels
float avg_intensity(vec4 pix) 
{
 return (pix.r + pix.g + pix.b)/3.;
}

vec4 get_pixel(vec2 coords, float dx, float dy) 
{
 return texture(tex0,coords + vec2(dx, dy));
}

// returns pixel color
float IsEdge(in vec2 coords)
{
	float dxtex = 1.0 /float(textureSize(tex0,0)) ;
	float dytex = 1.0 /float(textureSize(tex0,0));
	float pix[9];
	int k = -1;
	float delta;

	// read neighboring pixel intensities
	for (int i=-1; i<2; i++) {
	 for(int j=-1; j<2; j++) {
		k++;
		pix[k] = avg_intensity(get_pixel(coords,float(i)*dxtex,
													float(j)*dytex));
	 }
	}

	// average color differences around neighboring pixels
	delta = (abs(pix[1]-pix[7])+
					abs(pix[5]-pix[3]) +
					abs(pix[0]-pix[8])+
					abs(pix[2]-pix[6])
					 )/4.;

	//return clamp(5.5*delta,0.0,1.0);
	return clamp(edge_thres2*delta,0.0,1.0);
}

void main() {
	vec2 uv = vTexCoord.xy;
	vec4 tc = vec4(1.0, 0.0, 0.0, 1.0);
	vec3 colorOrg = texture(tex0, uv).rgb;
	vec3 vHSV =  RGBtoHSV(colorOrg.r,colorOrg.g,colorOrg.b);

	// hue limiting	
	if (colors == 0.0) {
		vHSV.y = 0.0;
	} else {
		float hue_divider = (360.0/colors);
		vHSV.x = round(vHSV.x/hue_divider)*hue_divider;

		float sat_divider = 100.0/sat_levels;
		vHSV.y = round((vHSV.y*100.0)/sat_divider)*sat_divider/100.0;
	}

	float bri_divider = 100.0/bri_levels;
	vHSV.z = round((vHSV.z*100.0)/bri_divider)*bri_divider/100.0;

	float edg = IsEdge(uv);
	vec3 vRGB = (edg >= (1.0-((edge_thres-1.0)*0.01)))? vec3(0.0,0.0,0.0):HSVtoRGB(vHSV.x,vHSV.y,vHSV.z);
	tc = vec4(vRGB.x,vRGB.y,vRGB.z, 1);
	FragColor = tc;
}
***
2019-04-11T13:18:37 [WARNING] Fragment shader could not be added

[cgvirus]

I afraid it can't be done as Olive is going towards OGL ES 2. I afraid this is why other effects are showing faults as well in your machine. Does upgrading GPU driver work?

[Deleted user]

Does upgrading GPU driver work?

No. I has ATI RS600/r300 (integrated GPU)

I afraid it can't be done as Olive is going towards OGL ES 2.

But Olive working well for me, except few video effects.

For example, Community effects such as "Bloom", "Edge Find", "Sharpening" work well for me

[cgvirus]

Not related to this repository