diff options
Diffstat (limited to 'source/blender/draw/engines/workbench/shaders/workbench_common_lib.glsl')
| -rw-r--r-- | source/blender/draw/engines/workbench/shaders/workbench_common_lib.glsl | 190 |
1 files changed, 94 insertions, 96 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_common_lib.glsl b/source/blender/draw/engines/workbench/shaders/workbench_common_lib.glsl index 5f3dbd75b15..c76ad8c1d7b 100644 --- a/source/blender/draw/engines/workbench/shaders/workbench_common_lib.glsl +++ b/source/blender/draw/engines/workbench/shaders/workbench_common_lib.glsl @@ -6,47 +6,46 @@ /* 4x4 bayer matrix prepared for 8bit UNORM precision error. */ #define P(x) (((x + 0.5) * (1.0 / 16.0) - 0.5) * (1.0 / 255.0)) -const vec4 dither_mat4x4[4] = vec4[4]( - vec4( P(0.0), P(8.0), P(2.0), P(10.0)), - vec4(P(12.0), P(4.0), P(14.0), P(6.0)), - vec4( P(3.0), P(11.0), P(1.0), P(9.0)), - vec4(P(15.0), P(7.0), P(13.0), P(5.0)) -); - -float bayer_dither_noise() { - ivec2 tx1 = ivec2(gl_FragCoord.xy) % 4; - ivec2 tx2 = ivec2(gl_FragCoord.xy) % 2; - return dither_mat4x4[tx1.x][tx1.y]; +const vec4 dither_mat4x4[4] = vec4[4](vec4(P(0.0), P(8.0), P(2.0), P(10.0)), + vec4(P(12.0), P(4.0), P(14.0), P(6.0)), + vec4(P(3.0), P(11.0), P(1.0), P(9.0)), + vec4(P(15.0), P(7.0), P(13.0), P(5.0))); + +float bayer_dither_noise() +{ + ivec2 tx1 = ivec2(gl_FragCoord.xy) % 4; + ivec2 tx2 = ivec2(gl_FragCoord.xy) % 2; + return dither_mat4x4[tx1.x][tx1.y]; } #ifdef WORKBENCH_ENCODE_NORMALS -#define WB_Normal vec2 +# define WB_Normal vec2 /* From http://aras-p.info/texts/CompactNormalStorage.html * Using Method #4: Spheremap Transform */ vec3 workbench_normal_decode(WB_Normal enc) { - vec2 fenc = enc.xy * 4.0 - 2.0; - float f = dot(fenc, fenc); - float g = sqrt(1.0 - f / 4.0); - vec3 n; - n.xy = fenc*g; - n.z = 1 - f / 2; - return n; + vec2 fenc = enc.xy * 4.0 - 2.0; + float f = dot(fenc, fenc); + float g = sqrt(1.0 - f / 4.0); + vec3 n; + n.xy = fenc * g; + n.z = 1 - f / 2; + return n; } /* From http://aras-p.info/texts/CompactNormalStorage.html * Using Method #4: Spheremap Transform */ WB_Normal workbench_normal_encode(vec3 n) { - float p = sqrt(n.z * 8.0 + 8.0); - n.xy = clamp(n.xy / p + 0.5, 0.0, 1.0); - return n.xy; + float p = sqrt(n.z * 8.0 + 8.0); + n.xy = clamp(n.xy / p + 0.5, 0.0, 1.0); + return n.xy; } #else -#define WB_Normal vec3 +# define WB_Normal vec3 /* Well just do nothing... */ # define workbench_normal_encode(a) (a) # define workbench_normal_decode(a) (a) @@ -61,113 +60,112 @@ WB_Normal workbench_normal_encode(vec3 n) /* Encode 2 float into 1 with the desired precision. */ float workbench_float_pair_encode(float v1, float v2) { - // const uint total_mask = ~(0xFFFFFFFFu << TOTAL_BITS); - // const uint v1_mask = ~(0xFFFFFFFFu << ROUGHNESS_BITS); - // const uint v2_mask = ~(0xFFFFFFFFu << METALLIC_BITS); - /* Same as above because some compiler are dumb af. and think we use mediump int. */ - const int total_mask = 0xFF; - const int v1_mask = 0x1F; - const int v2_mask = 0x7; - int iv1 = int(v1 * float(v1_mask)); - int iv2 = int(v2 * float(v2_mask)) << int(ROUGHNESS_BITS); - return float(iv1 | iv2) * (1.0 / float(total_mask)); + // const uint total_mask = ~(0xFFFFFFFFu << TOTAL_BITS); + // const uint v1_mask = ~(0xFFFFFFFFu << ROUGHNESS_BITS); + // const uint v2_mask = ~(0xFFFFFFFFu << METALLIC_BITS); + /* Same as above because some compiler are dumb af. and think we use mediump int. */ + const int total_mask = 0xFF; + const int v1_mask = 0x1F; + const int v2_mask = 0x7; + int iv1 = int(v1 * float(v1_mask)); + int iv2 = int(v2 * float(v2_mask)) << int(ROUGHNESS_BITS); + return float(iv1 | iv2) * (1.0 / float(total_mask)); } void workbench_float_pair_decode(float data, out float v1, out float v2) { - // const uint total_mask = ~(0xFFFFFFFFu << TOTAL_BITS); - // const uint v1_mask = ~(0xFFFFFFFFu << ROUGHNESS_BITS); - // const uint v2_mask = ~(0xFFFFFFFFu << METALLIC_BITS); - /* Same as above because some compiler are dumb af. and think we use mediump int. */ - const int total_mask = 0xFF; - const int v1_mask = 0x1F; - const int v2_mask = 0x7; - int idata = int(data * float(total_mask)); - v1 = float(idata & v1_mask) * (1.0 / float(v1_mask)); - v2 = float(idata >> int(ROUGHNESS_BITS)) * (1.0 / float(v2_mask)); + // const uint total_mask = ~(0xFFFFFFFFu << TOTAL_BITS); + // const uint v1_mask = ~(0xFFFFFFFFu << ROUGHNESS_BITS); + // const uint v2_mask = ~(0xFFFFFFFFu << METALLIC_BITS); + /* Same as above because some compiler are dumb af. and think we use mediump int. */ + const int total_mask = 0xFF; + const int v1_mask = 0x1F; + const int v2_mask = 0x7; + int idata = int(data * float(total_mask)); + v1 = float(idata & v1_mask) * (1.0 / float(v1_mask)); + v2 = float(idata >> int(ROUGHNESS_BITS)) * (1.0 / float(v2_mask)); } float calculate_transparent_weight(float z, float alpha) { #if 0 - /* Eq 10 : Good for surfaces with varying opacity (like particles) */ - float a = min(1.0, alpha * 10.0) + 0.01; - float b = -gl_FragCoord.z * 0.95 + 1.0; - float w = a * a * a * 3e2 * b * b * b; + /* Eq 10 : Good for surfaces with varying opacity (like particles) */ + float a = min(1.0, alpha * 10.0) + 0.01; + float b = -gl_FragCoord.z * 0.95 + 1.0; + float w = a * a * a * 3e2 * b * b * b; #else - /* Eq 7 put more emphasis on surfaces closer to the view. */ - // float w = 10.0 / (1e-5 + pow(abs(z) / 5.0, 2.0) + pow(abs(z) / 200.0, 6.0)); /* Eq 7 */ - // float w = 10.0 / (1e-5 + pow(abs(z) / 10.0, 3.0) + pow(abs(z) / 200.0, 6.0)); /* Eq 8 */ - // float w = 10.0 / (1e-5 + pow(abs(z) / 200.0, 4.0)); /* Eq 9 */ - /* Same as eq 7, but optimized. */ - float a = abs(z) / 5.0; - float b = abs(z) / 200.0; - b *= b; - float w = 10.0 / ((1e-5 + a * a) + b * (b * b)); /* Eq 7 */ + /* Eq 7 put more emphasis on surfaces closer to the view. */ + // float w = 10.0 / (1e-5 + pow(abs(z) / 5.0, 2.0) + pow(abs(z) / 200.0, 6.0)); /* Eq 7 */ + // float w = 10.0 / (1e-5 + pow(abs(z) / 10.0, 3.0) + pow(abs(z) / 200.0, 6.0)); /* Eq 8 */ + // float w = 10.0 / (1e-5 + pow(abs(z) / 200.0, 4.0)); /* Eq 9 */ + /* Same as eq 7, but optimized. */ + float a = abs(z) / 5.0; + float b = abs(z) / 200.0; + b *= b; + float w = 10.0 / ((1e-5 + a * a) + b * (b * b)); /* Eq 7 */ #endif - return alpha * clamp(w, 1e-2, 3e2); + return alpha * clamp(w, 1e-2, 3e2); } /* Special function only to be used with calculate_transparent_weight(). */ float linear_zdepth(float depth, vec4 viewvecs[3], mat4 proj_mat) { - if (proj_mat[3][3] == 0.0) { - float d = 2.0 * depth - 1.0; - return -proj_mat[3][2] / (d + proj_mat[2][2]); - } - else { - /* Return depth from near plane. */ - return depth * viewvecs[1].z; - } + if (proj_mat[3][3] == 0.0) { + float d = 2.0 * depth - 1.0; + return -proj_mat[3][2] / (d + proj_mat[2][2]); + } + else { + /* Return depth from near plane. */ + return depth * viewvecs[1].z; + } } vec3 view_vector_from_screen_uv(vec2 uv, vec4 viewvecs[3], mat4 proj_mat) { - return (proj_mat[3][3] == 0.0) - ? normalize(viewvecs[0].xyz + vec3(uv, 0.0) * viewvecs[1].xyz) - : vec3(0.0, 0.0, 1.0); + return (proj_mat[3][3] == 0.0) ? normalize(viewvecs[0].xyz + vec3(uv, 0.0) * viewvecs[1].xyz) : + vec3(0.0, 0.0, 1.0); } vec2 matcap_uv_compute(vec3 I, vec3 N, bool flipped) { - /* Quick creation of an orthonormal basis */ - float a = 1.0 / (1.0 + I.z); - float b = -I.x * I.y * a; - vec3 b1 = vec3(1.0 - I.x * I.x * a, b, -I.x); - vec3 b2 = vec3(b, 1.0 - I.y * I.y * a, -I.y); - vec2 matcap_uv = vec2(dot(b1, N), dot(b2, N)); - if (flipped) { - matcap_uv.x = -matcap_uv.x; - } - return matcap_uv * 0.496 + 0.5; + /* Quick creation of an orthonormal basis */ + float a = 1.0 / (1.0 + I.z); + float b = -I.x * I.y * a; + vec3 b1 = vec3(1.0 - I.x * I.x * a, b, -I.x); + vec3 b2 = vec3(b, 1.0 - I.y * I.y * a, -I.y); + vec2 matcap_uv = vec2(dot(b1, N), dot(b2, N)); + if (flipped) { + matcap_uv.x = -matcap_uv.x; + } + return matcap_uv * 0.496 + 0.5; } float srgb_to_linearrgb(float c) { - if (c < 0.04045) { - return (c < 0.0) ? 0.0 : c * (1.0 / 12.92); - } - else { - return pow((c + 0.055) * (1.0 / 1.055), 2.4); - } + if (c < 0.04045) { + return (c < 0.0) ? 0.0 : c * (1.0 / 12.92); + } + else { + return pow((c + 0.055) * (1.0 / 1.055), 2.4); + } } vec4 srgb_to_linearrgb(vec4 col_from) { - vec4 col_to; - col_to.r = srgb_to_linearrgb(col_from.r); - col_to.g = srgb_to_linearrgb(col_from.g); - col_to.b = srgb_to_linearrgb(col_from.b); - col_to.a = col_from.a; - return col_to; + vec4 col_to; + col_to.r = srgb_to_linearrgb(col_from.r); + col_to.g = srgb_to_linearrgb(col_from.g); + col_to.b = srgb_to_linearrgb(col_from.b); + col_to.a = col_from.a; + return col_to; } vec4 workbench_sample_texture(sampler2D image, vec2 coord, bool srgb, bool nearest_sampling) { - vec2 tex_size = vec2(textureSize(image, 0).xy); - /* TODO(fclem) We could do the same with sampler objects. - * But this is a quick workaround instead of messing with the GPUTexture itself. */ - vec2 uv = nearest_sampling ? (floor(coord * tex_size) + 0.5) / tex_size : coord; - vec4 color = texture(image, uv); - return (srgb) ? srgb_to_linearrgb(color) : color; + vec2 tex_size = vec2(textureSize(image, 0).xy); + /* TODO(fclem) We could do the same with sampler objects. + * But this is a quick workaround instead of messing with the GPUTexture itself. */ + vec2 uv = nearest_sampling ? (floor(coord * tex_size) + 0.5) / tex_size : coord; + vec4 color = texture(image, uv); + return (srgb) ? srgb_to_linearrgb(color) : color; } |