diff options
Diffstat (limited to 'drivers/gles2/shaders/copy.glsl')
| -rw-r--r-- | drivers/gles2/shaders/copy.glsl | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/drivers/gles2/shaders/copy.glsl b/drivers/gles2/shaders/copy.glsl new file mode 100644 index 0000000000..e833722ac3 --- /dev/null +++ b/drivers/gles2/shaders/copy.glsl @@ -0,0 +1,191 @@ +/* clang-format off */ +[vertex] + +#ifdef USE_GLES_OVER_GL +#define lowp +#define mediump +#define highp +#else +precision highp float; +precision highp int; +#endif + +attribute highp vec4 vertex_attrib; // attrib:0 +/* clang-format on */ + +#if defined(USE_CUBEMAP) || defined(USE_PANORAMA) +attribute vec3 cube_in; // attrib:4 +#else +attribute vec2 uv_in; // attrib:4 +#endif + +attribute vec2 uv2_in; // attrib:5 + +#if defined(USE_CUBEMAP) || defined(USE_PANORAMA) +varying vec3 cube_interp; +#else +varying vec2 uv_interp; +#endif +varying vec2 uv2_interp; + +// These definitions are here because the shader-wrapper builder does +// not understand `#elif defined()` +#ifdef USE_DISPLAY_TRANSFORM +#endif + +#ifdef USE_COPY_SECTION +uniform highp vec4 copy_section; +#elif defined(USE_DISPLAY_TRANSFORM) +uniform highp mat4 display_transform; +#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; +#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; +#elif defined(USE_DISPLAY_TRANSFORM) + uv_interp = (display_transform * vec4(uv_in, 1.0, 1.0)).xy; +#endif +} + +/* clang-format off */ +[fragment] + +#define M_PI 3.14159265359 + +#ifdef USE_GLES_OVER_GL +#define lowp +#define mediump +#define highp +#else +#if defined(USE_HIGHP_PRECISION) +precision highp float; +precision highp int; +#else +precision mediump float; +precision mediump int; +#endif +#endif + +#if defined(USE_CUBEMAP) || defined(USE_PANORAMA) +varying vec3 cube_interp; +#else +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 +uniform sampler2D source; // texunit:0 +#endif + +#ifdef SEP_CBCR_TEXTURE +uniform sampler2D CbCr; //texunit:1 +#endif + +varying vec2 uv2_interp; + +#ifdef USE_MULTIPLIER +uniform float multiplier; +#endif + +#ifdef USE_CUSTOM_ALPHA +uniform float custom_alpha; +#endif + +#if defined(USE_PANORAMA) || defined(USE_ASYM_PANO) +uniform highp mat4 sky_transform; + +vec4 texturePanorama(sampler2D pano, vec3 normal) { + 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 texture2D(pano, st); +} + +#endif + +void main() { +#ifdef USE_PANORAMA + + vec3 cube_normal = normalize(cube_interp); + cube_normal.z = -cube_normal.z; + cube_normal = mat3(sky_transform) * cube_normal; + cube_normal.z = -cube_normal.z; + + vec4 color = texturePanorama(source, cube_normal); + +#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. + // Asymmetrical projection means the center of projection is no longer in the center of the screen but shifted. + // 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 = -1.0; + 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(sky_transform) * 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)); +#elif defined(SEP_CBCR_TEXTURE) + vec4 color; + color.r = texture2D(source, uv_interp).r; + color.gb = texture2D(CbCr, uv_interp).rg - vec2(0.5, 0.5); + color.a = 1.0; +#else + vec4 color = texture2D(source, uv_interp); +#endif + +#ifdef YCBCR_TO_RGB + // YCbCr -> RGB conversion + + // Using BT.601, which is the standard for SDTV is provided as a reference + color.rgb = mat3( + vec3(1.00000, 1.00000, 1.00000), + vec3(0.00000, -0.34413, 1.77200), + vec3(1.40200, -0.71414, 0.00000)) * + color.rgb; +#endif + +#ifdef USE_NO_ALPHA + color.a = 1.0; +#endif + +#ifdef USE_CUSTOM_ALPHA + color.a = custom_alpha; +#endif + +#ifdef USE_MULTIPLIER + color.rgb *= multiplier; +#endif + + gl_FragColor = color; +} |