diff options
author | OmarSquircleArt <omar.squircleart@gmail.com> | 2019-08-30 18:23:04 +0300 |
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committer | OmarSquircleArt <omar.squircleart@gmail.com> | 2019-08-30 18:28:57 +0300 |
commit | 8cd0da88e55a0c0f88297a5f0f770eb40acc6219 (patch) | |
tree | 585b9bcc07ce392c6164ac0230d56d617ac051ca /source/blender/gpu/shaders/material/gpu_shader_material_tex_image.glsl | |
parent | ac646bc20dafe176c1b84ee5beddf980aba11358 (diff) |
GPU: Split gpu_shader_material into multiple files.
This patch continue the efforts to split the `gpu_shader_material` file
started in D5569.
Dependency resolution is now recursive. Each shading node gets its own
file. Additionally, some utility files are added to be shared between
files, like `math_util`, `color_util`, and `hash`. Some files are always
included because they may be used in the execution function, like
`world_normals`.
Some glsl functions appeared to be unused, so they were removed, like
`output_node`, `bits_to_01`, and `exp_blender`. Other functions have
been renamed to be more general and get used as utils, like `texco_norm`
which became `vector_normalize`.
A lot of the opengl tests fails, but those same tests also fail in
master, so this is probably unrelated to this patch.
Reviewers: brecht
Differential Revision: https://developer.blender.org/D5616
Diffstat (limited to 'source/blender/gpu/shaders/material/gpu_shader_material_tex_image.glsl')
-rw-r--r-- | source/blender/gpu/shaders/material/gpu_shader_material_tex_image.glsl | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_tex_image.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_tex_image.glsl new file mode 100644 index 00000000000..c234e064d36 --- /dev/null +++ b/source/blender/gpu/shaders/material/gpu_shader_material_tex_image.glsl @@ -0,0 +1,355 @@ +void point_texco_remap_square(vec3 vin, out vec3 vout) +{ + vout = vin * 2.0 - 1.0; +} + +void point_texco_clamp(vec3 vin, sampler2D ima, out vec3 vout) +{ + vec2 half_texel_size = 0.5 / vec2(textureSize(ima, 0).xy); + vout = clamp(vin, half_texel_size.xyy, 1.0 - half_texel_size.xyy); +} + +void point_map_to_sphere(vec3 vin, out vec3 vout) +{ + float len = length(vin); + float v, u; + if (len > 0.0) { + if (vin.x == 0.0 && vin.y == 0.0) { + u = 0.0; + } + else { + u = (1.0 - atan(vin.x, vin.y) / M_PI) / 2.0; + } + + v = 1.0 - acos(vin.z / len) / M_PI; + } + else { + v = u = 0.0; + } + + vout = vec3(u, v, 0.0); +} + +void point_map_to_tube(vec3 vin, out vec3 vout) +{ + float u, v; + v = (vin.z + 1.0) * 0.5; + float len = sqrt(vin.x * vin.x + vin.y * vin[1]); + if (len > 0.0) { + u = (1.0 - (atan(vin.x / len, vin.y / len) / M_PI)) * 0.5; + } + else { + v = u = 0.0; + } + + vout = vec3(u, v, 0.0); +} + +/* 16bits floats limits. Higher/Lower values produce +/-inf. */ +#define safe_color(a) (clamp(a, -65520.0, 65520.0)) + +void node_tex_image_linear(vec3 co, sampler2D ima, out vec4 color, out float alpha) +{ + color = safe_color(texture(ima, co.xy)); + alpha = color.a; +} + +void node_tex_image_linear_no_mip(vec3 co, sampler2D ima, out vec4 color, out float alpha) +{ + color = safe_color(textureLod(ima, co.xy, 0.0)); + alpha = color.a; +} + +void node_tex_image_nearest(vec3 co, sampler2D ima, out vec4 color, out float alpha) +{ + ivec2 pix = ivec2(fract(co.xy) * textureSize(ima, 0).xy); + color = safe_color(texelFetch(ima, pix, 0)); + alpha = color.a; +} + +/* @arg f: signed distance to texel center. */ +void cubic_bspline_coefs(vec2 f, out vec2 w0, out vec2 w1, out vec2 w2, out vec2 w3) +{ + vec2 f2 = f * f; + vec2 f3 = f2 * f; + /* Bspline coefs (optimized) */ + w3 = f3 / 6.0; + w0 = -w3 + f2 * 0.5 - f * 0.5 + 1.0 / 6.0; + w1 = f3 * 0.5 - f2 * 1.0 + 2.0 / 3.0; + w2 = 1.0 - w0 - w1 - w3; +} + +void node_tex_image_cubic_ex( + vec3 co, sampler2D ima, float do_extend, out vec4 color, out float alpha) +{ + vec2 tex_size = vec2(textureSize(ima, 0).xy); + + co.xy *= tex_size; + /* texel center */ + vec2 tc = floor(co.xy - 0.5) + 0.5; + vec2 w0, w1, w2, w3; + cubic_bspline_coefs(co.xy - tc, w0, w1, w2, w3); + +#if 1 /* Optimized version using 4 filtered tap. */ + vec2 s0 = w0 + w1; + vec2 s1 = w2 + w3; + + vec2 f0 = w1 / (w0 + w1); + vec2 f1 = w3 / (w2 + w3); + + vec4 final_co; + final_co.xy = tc - 1.0 + f0; + final_co.zw = tc + 1.0 + f1; + + if (do_extend == 1.0) { + final_co = clamp(final_co, vec4(0.5), tex_size.xyxy - 0.5); + } + final_co /= tex_size.xyxy; + + color = safe_color(textureLod(ima, final_co.xy, 0.0)) * s0.x * s0.y; + color += safe_color(textureLod(ima, final_co.zy, 0.0)) * s1.x * s0.y; + color += safe_color(textureLod(ima, final_co.xw, 0.0)) * s0.x * s1.y; + color += safe_color(textureLod(ima, final_co.zw, 0.0)) * s1.x * s1.y; + +#else /* Reference bruteforce 16 tap. */ + color = texelFetch(ima, ivec2(tc + vec2(-1.0, -1.0)), 0) * w0.x * w0.y; + color += texelFetch(ima, ivec2(tc + vec2(0.0, -1.0)), 0) * w1.x * w0.y; + color += texelFetch(ima, ivec2(tc + vec2(1.0, -1.0)), 0) * w2.x * w0.y; + color += texelFetch(ima, ivec2(tc + vec2(2.0, -1.0)), 0) * w3.x * w0.y; + + color += texelFetch(ima, ivec2(tc + vec2(-1.0, 0.0)), 0) * w0.x * w1.y; + color += texelFetch(ima, ivec2(tc + vec2(0.0, 0.0)), 0) * w1.x * w1.y; + color += texelFetch(ima, ivec2(tc + vec2(1.0, 0.0)), 0) * w2.x * w1.y; + color += texelFetch(ima, ivec2(tc + vec2(2.0, 0.0)), 0) * w3.x * w1.y; + + color += texelFetch(ima, ivec2(tc + vec2(-1.0, 1.0)), 0) * w0.x * w2.y; + color += texelFetch(ima, ivec2(tc + vec2(0.0, 1.0)), 0) * w1.x * w2.y; + color += texelFetch(ima, ivec2(tc + vec2(1.0, 1.0)), 0) * w2.x * w2.y; + color += texelFetch(ima, ivec2(tc + vec2(2.0, 1.0)), 0) * w3.x * w2.y; + + color += texelFetch(ima, ivec2(tc + vec2(-1.0, 2.0)), 0) * w0.x * w3.y; + color += texelFetch(ima, ivec2(tc + vec2(0.0, 2.0)), 0) * w1.x * w3.y; + color += texelFetch(ima, ivec2(tc + vec2(1.0, 2.0)), 0) * w2.x * w3.y; + color += texelFetch(ima, ivec2(tc + vec2(2.0, 2.0)), 0) * w3.x * w3.y; +#endif + + alpha = color.a; +} + +void node_tex_image_cubic(vec3 co, sampler2D ima, out vec4 color, out float alpha) +{ + node_tex_image_cubic_ex(co, ima, 0.0, color, alpha); +} + +void node_tex_image_cubic_extend(vec3 co, sampler2D ima, out vec4 color, out float alpha) +{ + node_tex_image_cubic_ex(co, ima, 1.0, color, alpha); +} + +void node_tex_image_smart(vec3 co, sampler2D ima, out vec4 color, out float alpha) +{ + /* use cubic for now */ + node_tex_image_cubic_ex(co, ima, 0.0, color, alpha); +} + +void tex_box_sample_linear( + vec3 texco, vec3 N, sampler2D ima, out vec4 color1, out vec4 color2, out vec4 color3) +{ + /* X projection */ + vec2 uv = texco.yz; + if (N.x < 0.0) { + uv.x = 1.0 - uv.x; + } + color1 = texture(ima, uv); + /* Y projection */ + uv = texco.xz; + if (N.y > 0.0) { + uv.x = 1.0 - uv.x; + } + color2 = texture(ima, uv); + /* Z projection */ + uv = texco.yx; + if (N.z > 0.0) { + uv.x = 1.0 - uv.x; + } + color3 = texture(ima, uv); +} + +void tex_box_sample_nearest( + vec3 texco, vec3 N, sampler2D ima, out vec4 color1, out vec4 color2, out vec4 color3) +{ + /* X projection */ + vec2 uv = texco.yz; + if (N.x < 0.0) { + uv.x = 1.0 - uv.x; + } + ivec2 pix = ivec2(uv.xy * textureSize(ima, 0).xy); + color1 = texelFetch(ima, pix, 0); + /* Y projection */ + uv = texco.xz; + if (N.y > 0.0) { + uv.x = 1.0 - uv.x; + } + pix = ivec2(uv.xy * textureSize(ima, 0).xy); + color2 = texelFetch(ima, pix, 0); + /* Z projection */ + uv = texco.yx; + if (N.z > 0.0) { + uv.x = 1.0 - uv.x; + } + pix = ivec2(uv.xy * textureSize(ima, 0).xy); + color3 = texelFetch(ima, pix, 0); +} + +void tex_box_sample_cubic( + vec3 texco, vec3 N, sampler2D ima, out vec4 color1, out vec4 color2, out vec4 color3) +{ + float alpha; + /* X projection */ + vec2 uv = texco.yz; + if (N.x < 0.0) { + uv.x = 1.0 - uv.x; + } + node_tex_image_cubic_ex(uv.xyy, ima, 0.0, color1, alpha); + /* Y projection */ + uv = texco.xz; + if (N.y > 0.0) { + uv.x = 1.0 - uv.x; + } + node_tex_image_cubic_ex(uv.xyy, ima, 0.0, color2, alpha); + /* Z projection */ + uv = texco.yx; + if (N.z > 0.0) { + uv.x = 1.0 - uv.x; + } + node_tex_image_cubic_ex(uv.xyy, ima, 0.0, color3, alpha); +} + +void tex_box_sample_smart( + vec3 texco, vec3 N, sampler2D ima, out vec4 color1, out vec4 color2, out vec4 color3) +{ + tex_box_sample_cubic(texco, N, ima, color1, color2, color3); +} + +void node_tex_image_box(vec3 texco, + vec3 N, + vec4 color1, + vec4 color2, + vec4 color3, + sampler2D ima, + float blend, + out vec4 color, + out float alpha) +{ + /* project from direction vector to barycentric coordinates in triangles */ + N = abs(N); + N /= dot(N, vec3(1.0)); + + /* basic idea is to think of this as a triangle, each corner representing + * one of the 3 faces of the cube. in the corners we have single textures, + * in between we blend between two textures, and in the middle we a blend + * between three textures. + * + * the Nxyz values are the barycentric coordinates in an equilateral + * triangle, which in case of blending, in the middle has a smaller + * equilateral triangle where 3 textures blend. this divides things into + * 7 zones, with an if () test for each zone + * EDIT: Now there is only 4 if's. */ + + float limit = 0.5 + 0.5 * blend; + + vec3 weight; + weight = N.xyz / (N.xyx + N.yzz); + weight = clamp((weight - 0.5 * (1.0 - blend)) / max(1e-8, blend), 0.0, 1.0); + + /* test for mixes between two textures */ + if (N.z < (1.0 - limit) * (N.y + N.x)) { + weight.z = 0.0; + weight.y = 1.0 - weight.x; + } + else if (N.x < (1.0 - limit) * (N.y + N.z)) { + weight.x = 0.0; + weight.z = 1.0 - weight.y; + } + else if (N.y < (1.0 - limit) * (N.x + N.z)) { + weight.y = 0.0; + weight.x = 1.0 - weight.z; + } + else { + /* last case, we have a mix between three */ + weight = ((2.0 - limit) * N + (limit - 1.0)) / max(1e-8, blend); + } + + color = weight.x * color1 + weight.y * color2 + weight.z * color3; + alpha = color.a; +} + +void tex_clip_linear(vec3 co, sampler2D ima, vec4 icolor, out vec4 color, out float alpha) +{ + vec2 tex_size = vec2(textureSize(ima, 0).xy); + vec2 minco = min(co.xy, 1.0 - co.xy); + minco = clamp(minco * tex_size + 0.5, 0.0, 1.0); + float fac = minco.x * minco.y; + + color = mix(vec4(0.0), icolor, fac); + alpha = color.a; +} + +void tex_clip_nearest(vec3 co, sampler2D ima, vec4 icolor, out vec4 color, out float alpha) +{ + vec4 minco = vec4(co.xy, 1.0 - co.xy); + color = (any(lessThan(minco, vec4(0.0)))) ? vec4(0.0) : icolor; + alpha = color.a; +} + +void tex_clip_cubic(vec3 co, sampler2D ima, vec4 icolor, out vec4 color, out float alpha) +{ + vec2 tex_size = vec2(textureSize(ima, 0).xy); + + co.xy *= tex_size; + /* texel center */ + vec2 tc = floor(co.xy - 0.5) + 0.5; + vec2 w0, w1, w2, w3; + cubic_bspline_coefs(co.xy - tc, w0, w1, w2, w3); + + /* TODO Optimize this part. I'm sure there is a smarter way to do that. + * Could do that when sampling? */ +#define CLIP_CUBIC_SAMPLE(samp, size) \ + (float(all(greaterThan(samp, vec2(-0.5)))) * float(all(lessThan(ivec2(samp), itex_size)))) + ivec2 itex_size = textureSize(ima, 0).xy; + float fac; + fac = CLIP_CUBIC_SAMPLE(tc + vec2(-1.0, -1.0), itex_size) * w0.x * w0.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(0.0, -1.0), itex_size) * w1.x * w0.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(1.0, -1.0), itex_size) * w2.x * w0.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(2.0, -1.0), itex_size) * w3.x * w0.y; + + fac += CLIP_CUBIC_SAMPLE(tc + vec2(-1.0, 0.0), itex_size) * w0.x * w1.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(0.0, 0.0), itex_size) * w1.x * w1.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(1.0, 0.0), itex_size) * w2.x * w1.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(2.0, 0.0), itex_size) * w3.x * w1.y; + + fac += CLIP_CUBIC_SAMPLE(tc + vec2(-1.0, 1.0), itex_size) * w0.x * w2.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(0.0, 1.0), itex_size) * w1.x * w2.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(1.0, 1.0), itex_size) * w2.x * w2.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(2.0, 1.0), itex_size) * w3.x * w2.y; + + fac += CLIP_CUBIC_SAMPLE(tc + vec2(-1.0, 2.0), itex_size) * w0.x * w3.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(0.0, 2.0), itex_size) * w1.x * w3.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(1.0, 2.0), itex_size) * w2.x * w3.y; + fac += CLIP_CUBIC_SAMPLE(tc + vec2(2.0, 2.0), itex_size) * w3.x * w3.y; +#undef CLIP_CUBIC_SAMPLE + + color = mix(vec4(0.0), icolor, fac); + alpha = color.a; +} + +void tex_clip_smart(vec3 co, sampler2D ima, vec4 icolor, out vec4 color, out float alpha) +{ + tex_clip_cubic(co, ima, icolor, color, alpha); +} + +void node_tex_image_empty(vec3 co, out vec4 color, out float alpha) +{ + color = vec4(0.0); + alpha = 0.0; +} |