diff options
Diffstat (limited to 'drivers/gles2/shaders/copy.glsl')
| -rw-r--r-- | drivers/gles2/shaders/copy.glsl | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gles2/shaders/copy.glsl b/drivers/gles2/shaders/copy.glsl index 16bbde196d..0b8da4f875 100644 --- a/drivers/gles2/shaders/copy.glsl +++ b/drivers/gles2/shaders/copy.glsl @@ -35,6 +35,8 @@ 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; #endif @@ -68,6 +70,11 @@ varying vec2 uv_interp; #endif /* clang-format on */ +#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 @@ -108,6 +115,21 @@ void main() { vec4 color = texturePanorama(source, normalize(cube_interp)); +#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(source, normalize(cube_normal.xyz)); + #elif defined(USE_CUBEMAP) vec4 color = textureCube(source_cube, normalize(cube_interp)); #else |