T55454: removal of clay engine

The ClayEngine was introduced to test the blender2.8 architecture during
development. As currently we have the wanted features implemented with
matcaps we are going to remove the clay engine as it was never intended
to be an official releasable engine

Note: The test cases are never run. But when enabled will be skipped as
they were implemented over the Clay Engine

1 files changed, 0 insertions, 252 deletions

diff --git a/source/blender/draw/engines/clay/shaders/clay_frag.glsl b/source/blender/draw/engines/clay/shaders/clay_frag.glsl
deleted file mode 100644
index 1939e4b735d..00000000000
--- a/source/blender/draw/engines/clay/shaders/clay_frag.glsl
+++ /dev/null
@@ -1,252 +0,0 @@
-uniform vec2 invscreenres;
-uniform mat4 WinMatrix;
-
-/* Matcap */
-uniform sampler2DArray matcaps;
-
-/* Screen Space Occlusion */
-/* store the view space vectors for the corners of the view frustum here.
- * It helps to quickly reconstruct view space vectors by using uv coordinates,
- * see http://www.derschmale.com/2014/01/26/reconstructing-positions-from-the-depth-buffer */
-uniform vec4 viewvecs[3];
-uniform vec4 ssao_params;
-
-uniform sampler2D ssao_jitter;
-
-/* Material Parameters packed in an UBO */
-struct Material {
-	vec4 ssao_params_var;
-	vec4 matcap_hsv_id;
-	vec4 matcap_rot; /* vec4 to ensure 16 bytes alignement (don't trust compiler) */
-};
-
-layout(std140) uniform samples_block {
-	vec4 ssao_samples[500];
-};
-
-layout(std140) uniform matcaps_block {
-	vec4 matcaps_color[24];
-};
-
-layout(std140) uniform material_block {
-	Material matcaps_param[MAX_MATERIAL];
-};
-
-#ifdef DEFERRED_SHADING
-uniform sampler2D depthtex;
-uniform sampler2D normaltex;
-uniform isampler2D idtex;
-int mat_id; /* global */
-#else
-uniform int mat_id;
-#endif
-
-/* Aliases */
-#define ssao_samples_num	ssao_params.x
-#define jitter_tilling		ssao_params.yz
-#define dfdy_sign			ssao_params.w
-
-#define matcap_hsv			matcaps_param[mat_id].matcap_hsv_id.xyz
-#define matcap_index		matcaps_param[mat_id].matcap_hsv_id.w
-#define matcap_rotation		matcaps_param[mat_id].matcap_rot.xy
-
-#ifndef DEFERRED_SHADING
-#  ifdef USE_FLAT_NORMAL
-flat in vec3 normal;
-#  else
-in vec3 normal;
-#  endif
-#endif
-
-out vec4 fragColor;
-
-/* TODO Move this to SSAO modules */
-/* simple depth reconstruction, see http://www.derschmale.com/2014/01/26/reconstructing-positions-from-the-depth-buffer
- * we change the factors from the article to fit the OpennGL model.  */
-vec3 get_view_space_from_depth(in vec2 uvcoords, in float depth)
-{
-	if (WinMatrix[3][3] == 0.0) {
-		/* Perspective */
-		float d = 2.0 * depth - 1.0;
-
-		float zview = -WinMatrix[3][2] / (d + WinMatrix[2][2]);
-
-		return zview * (viewvecs[0].xyz + vec3(uvcoords, 0.0) * viewvecs[1].xyz);
-	}
-	else {
-		/* Orthographic */
-		vec3 offset = vec3(uvcoords, depth);
-
-		return viewvecs[0].xyz + offset * viewvecs[1].xyz;
-	}
-}
-
-#ifdef USE_HSV
-void rgb_to_hsv(vec3 rgb, out vec3 outcol)
-{
-	float cmax, cmin, h, s, v, cdelta;
-	vec3 c;
-
-	cmax = max(rgb[0], max(rgb[1], rgb[2]));
-	cmin = min(rgb[0], min(rgb[1], rgb[2]));
-	cdelta = cmax - cmin;
-
-	v = cmax;
-	if (cmax != 0.0)
-		s = cdelta / cmax;
-	else {
-		s = 0.0;
-		h = 0.0;
-	}
-
-	if (s == 0.0) {
-		h = 0.0;
-	}
-	else {
-		c = (vec3(cmax, cmax, cmax) - rgb.xyz) / cdelta;
-
-		if (rgb.x == cmax) h = c[2] - c[1];
-		else if (rgb.y == cmax) h = 2.0 + c[0] -  c[2];
-		else h = 4.0 + c[1] - c[0];
-
-		h /= 6.0;
-
-		if (h < 0.0)
-			h += 1.0;
-	}
-
-	outcol = vec3(h, s, v);
-}
-
-void hsv_to_rgb(vec3 hsv, out vec3 outcol)
-{
-	float i, f, p, q, t, h, s, v;
-	vec3 rgb;
-
-	h = hsv[0];
-	s = hsv[1];
-	v = hsv[2];
-
-	if (s == 0.0) {
-		rgb = vec3(v, v, v);
-	}
-	else {
-		if (h == 1.0)
-			h = 0.0;
-
-		h *= 6.0;
-		i = floor(h);
-		f = h - i;
-		rgb = vec3(f, f, f);
-		p = v * (1.0 - s);
-		q = v * (1.0 - (s * f));
-		t = v * (1.0 - (s * (1.0 - f)));
-
-		if (i == 0.0) rgb = vec3(v, t, p);
-		else if (i == 1.0) rgb = vec3(q, v, p);
-		else if (i == 2.0) rgb = vec3(p, v, t);
-		else if (i == 3.0) rgb = vec3(p, q, v);
-		else if (i == 4.0) rgb = vec3(t, p, v);
-		else rgb = vec3(v, p, q);
-	}
-
-	outcol = rgb;
-}
-
-void hue_sat(float hue, float sat, float value, inout vec3 col)
-{
-	vec3 hsv;
-
-	rgb_to_hsv(col, hsv);
-
-	hsv.x += hue;
-	hsv.x -= floor(hsv.x);
-	hsv.y *= sat;
-	hsv.y = clamp(hsv.y, 0.0, 1.0);
-	hsv.z *= value;
-	hsv.z = clamp(hsv.z, 0.0, 1.0);
-
-	hsv_to_rgb(hsv, col);
-}
-#endif
-
-#ifdef USE_AO
-/* Prototype */
-void ssao_factors(
-        in float depth, in vec3 normal, in vec3 position, in vec2 screenco,
-        out float cavities, out float edges);
-#endif
-
-/* From http://aras-p.info/texts/CompactNormalStorage.html
- * Using Method #4: Spheremap Transform */
-vec3 normal_decode(vec2 enc)
-{
-	vec2 fenc = enc * 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;
-}
-
-vec3 shade(vec3 N, vec3 position, float depth, vec2 screenco)
-{
-#ifdef USE_ROTATION
-	/* Rotate texture coordinates */
-	vec2 rotY = vec2(-matcap_rotation.y, matcap_rotation.x);
-	vec2 texco = abs(vec2(dot(N.xy, matcap_rotation), dot(N.xy, rotY)) * .49 + 0.5);
-#else
-	vec2 texco = abs(N.xy * .49 + 0.5);
-#endif
-	vec3 col = texture(matcaps, vec3(texco, matcap_index)).rgb;
-
-#ifdef USE_AO
-	float cavity = 0.0, edges = 0.0;
-	ssao_factors(depth, N, position, screenco, cavity, edges);
-
-	col *= mix(vec3(1.0), matcaps_color[int(matcap_index)].rgb, cavity);
-#endif
-
-#ifdef USE_HSV
-	hue_sat(matcap_hsv.x, matcap_hsv.y, matcap_hsv.z, col);
-#endif
-
-#ifdef USE_AO
-	/* Apply highlights after hue shift */
-	col *= edges + 1.0;
-#endif
-
-	return col;
-}
-
-void main()
-{
-	vec2 screenco = vec2(gl_FragCoord.xy) * invscreenres;
-
-#ifdef DEFERRED_SHADING
-	ivec2 texel = ivec2(gl_FragCoord.xy);
-	mat_id = texelFetch(idtex, texel, 0).r;
-
-	/* early out (manual stencil test) */
-	if (mat_id == 0)
-		discard;
-
-	float depth = texelFetch(depthtex, texel, 0).r;
-	vec3 N = normal_decode(texelFetch(normaltex, texel, 0).rg);
-	/* see the prepass for explanations. */
-	if (mat_id < 0) {
-		N = -N;
-	}
-	mat_id = abs(mat_id) - 1;
-#else
-	float depth = gl_FragCoord.z;
-	vec3 N = normal;
-#endif
-
-	vec3 position = get_view_space_from_depth(screenco, depth);
-
-	vec3 col = shade(N, position, depth, screenco);
-
-	fragColor = vec4(col, 1.0);
-}