diff options
Diffstat (limited to 'drivers/gles3/shaders/copy.glsl')
| -rw-r--r-- | drivers/gles3/shaders/copy.glsl | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/gles3/shaders/copy.glsl b/drivers/gles3/shaders/copy.glsl index d33193ee50..743fe122d1 100644 --- a/drivers/gles3/shaders/copy.glsl +++ b/drivers/gles3/shaders/copy.glsl @@ -27,6 +27,8 @@ 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 @@ -59,6 +61,11 @@ in vec3 cube_interp; 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 @@ -70,7 +77,7 @@ uniform sampler2D source; //texunit:0 uniform float multiplier; #endif -#ifdef USE_PANORAMA +#if defined(USE_PANORAMA) || defined(USE_ASYM_PANO) vec4 texturePanorama(vec3 normal,sampler2D pano ) { @@ -122,6 +129,21 @@ void main() { vec4 color = texturePanorama( normalize(cube_interp), source ); +#elif defined(USE_ASYM_PANO) + + // When an assymetrical 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) ); |