godot/drivers/gles3/shaders/copy.glsl
2018-01-18 22:01:42 +01:00

214 lines
4.6 KiB
GLSL

[vertex]
layout(location=0) in highp vec4 vertex_attrib;
#if defined(USE_CUBEMAP) || defined(USE_PANORAMA)
layout(location=4) in vec3 cube_in;
#else
layout(location=4) in vec2 uv_in;
#endif
layout(location=5) in vec2 uv2_in;
#if defined(USE_CUBEMAP) || defined(USE_PANORAMA)
out vec3 cube_interp;
#else
out vec2 uv_interp;
#endif
out vec2 uv2_interp;
#ifdef USE_COPY_SECTION
uniform vec4 copy_section;
#endif
void main() {
#if defined(USE_CUBEMAP) || defined(USE_PANORAMA)
cube_interp = cube_in;
#elif defined(USE_ASYM_PANO)
uv_interp = vertex_attrib.xy;
#else
uv_interp = uv_in;
#ifdef V_FLIP
uv_interp.y = 1.0-uv_interp.y;
#endif
#endif
uv2_interp = uv2_in;
gl_Position = vertex_attrib;
#ifdef USE_COPY_SECTION
uv_interp = copy_section.xy + uv_interp * copy_section.zw;
gl_Position.xy = (copy_section.xy + (gl_Position.xy * 0.5 + 0.5) * copy_section.zw) * 2.0 - 1.0;
#endif
}
[fragment]
#define M_PI 3.14159265359
#if !defined(USE_GLES_OVER_GL)
precision mediump float;
#endif
#if defined(USE_CUBEMAP) || defined(USE_PANORAMA)
in vec3 cube_interp;
#else
in vec2 uv_interp;
#endif
#ifdef USE_ASYM_PANO
uniform highp mat4 pano_transform;
uniform highp vec4 asym_proj;
#endif
#ifdef USE_CUBEMAP
uniform samplerCube source_cube; //texunit:0
#else
uniform sampler2D source; //texunit:0
#endif
#ifdef USE_MULTIPLIER
uniform float multiplier;
#endif
#if defined(USE_PANORAMA) || defined(USE_ASYM_PANO)
vec4 texturePanorama(vec3 normal,sampler2D pano ) {
vec2 st = vec2(
atan(normal.x, normal.z),
acos(normal.y)
);
if(st.x < 0.0)
st.x += M_PI*2.0;
st/=vec2(M_PI*2.0,M_PI);
return textureLod(pano,st,0.0);
}
#endif
uniform float stuff;
uniform vec2 pixel_size;
in vec2 uv2_interp;
#ifdef USE_BCS
uniform vec3 bcs;
#endif
#ifdef USE_COLOR_CORRECTION
uniform sampler2D color_correction; //texunit:1
#endif
layout(location = 0) out vec4 frag_color;
void main() {
//vec4 color = color_interp;
#ifdef USE_PANORAMA
vec4 color = texturePanorama( normalize(cube_interp), source );
#elif defined(USE_ASYM_PANO)
// When an asymmetrical projection matrix is used (applicable for stereoscopic rendering i.e. VR) we need to do this calculation per fragment to get a perspective correct result.
// Note that we're ignoring the x-offset for IPD, with Z sufficiently in the distance it becomes neglectible, as a result we could probably just set cube_normal.z to -1.
// The Matrix[2][0] (= asym_proj.x) and Matrix[2][1] (= asym_proj.z) values are what provide the right shift in the image.
vec3 cube_normal;
cube_normal.z = -1000000.0;
cube_normal.x = (cube_normal.z * (-uv_interp.x - asym_proj.x)) / asym_proj.y;
cube_normal.y = (cube_normal.z * (-uv_interp.y - asym_proj.z)) / asym_proj.a;
cube_normal = mat3(pano_transform) * cube_normal;
cube_normal.z = -cube_normal.z;
vec4 color = texturePanorama( normalize(cube_normal.xyz), source );
#elif defined(USE_CUBEMAP)
vec4 color = texture( source_cube, normalize(cube_interp) );
#else
vec4 color = textureLod( source, uv_interp,0.0 );
#endif
#ifdef LINEAR_TO_SRGB
//regular Linear -> SRGB conversion
vec3 a = vec3(0.055);
color.rgb = mix( (vec3(1.0)+a)*pow(color.rgb,vec3(1.0/2.4))-a , 12.92*color.rgb , lessThan(color.rgb,vec3(0.0031308)));
#endif
#ifdef SRGB_TO_LINEAR
color.rgb = mix(pow((color.rgb + vec3(0.055)) * (1.0 / (1.0 + 0.055)),vec3(2.4)),color.rgb * (1.0 / 12.92),lessThan(color.rgb,vec3(0.04045)));
#endif
#ifdef DEBUG_GRADIENT
color.rg=uv_interp;
color.b=0.0;
#endif
#ifdef DISABLE_ALPHA
color.a=1.0;
#endif
#ifdef GAUSSIAN_HORIZONTAL
color*=0.38774;
color+=texture( source, uv_interp+vec2( 1.0, 0.0)*pixel_size )*0.24477;
color+=texture( source, uv_interp+vec2( 2.0, 0.0)*pixel_size )*0.06136;
color+=texture( source, uv_interp+vec2(-1.0, 0.0)*pixel_size )*0.24477;
color+=texture( source, uv_interp+vec2(-2.0, 0.0)*pixel_size )*0.06136;
#endif
#ifdef GAUSSIAN_VERTICAL
color*=0.38774;
color+=texture( source, uv_interp+vec2( 0.0, 1.0)*pixel_size )*0.24477;
color+=texture( source, uv_interp+vec2( 0.0, 2.0)*pixel_size )*0.06136;
color+=texture( source, uv_interp+vec2( 0.0,-1.0)*pixel_size )*0.24477;
color+=texture( source, uv_interp+vec2( 0.0,-2.0)*pixel_size )*0.06136;
#endif
#ifdef USE_BCS
color.rgb = mix(vec3(0.0),color.rgb,bcs.x);
color.rgb = mix(vec3(0.5),color.rgb,bcs.y);
color.rgb = mix(vec3(dot(vec3(1.0),color.rgb)*0.33333),color.rgb,bcs.z);
#endif
#ifdef USE_COLOR_CORRECTION
color.r = texture(color_correction,vec2(color.r,0.0)).r;
color.g = texture(color_correction,vec2(color.g,0.0)).g;
color.b = texture(color_correction,vec2(color.b,0.0)).b;
#endif
#ifdef USE_MULTIPLIER
color.rgb*=multiplier;
#endif
frag_color = color;
}