Differential D2889 Diff 11446 source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_pixel_frag.glsl

Changeset View

Standalone View

				uniform mat4 ProjectionMatrix;
				uniform mat4 ViewMatrix;

				uniform sampler2D strokeColor;
				uniform sampler2D strokeDepth;

				uniform int size[3];
				uniform vec4 color;

				uniform vec3 loc;
				uniform float pixsize; /* rv3d->pixsize */
				uniform float pixelsize; /* U.pixelsize */
				uniform float pixfactor;

				out vec4 FragColor;

				int uselines = size[2];
				float defaultpixsize = pixsize * pixelsize * (1000.0 / pixfactor);
				vec2 nsize = max(vec2(size[0], size[1]), 3.0);

				/* This pixelation shader is a modified version of original Geeks3d.com code */
				void main()
				{
				vec2 uv = vec2(gl_FragCoord.xy);
				vec4 nloc = ProjectionMatrix * ViewMatrix * vec4(loc.xyz, 1.0);

				float dx = (ProjectionMatrix[3][3] == 0.0) ? (nsize[0] / (nloc.z * defaultpixsize)) : (nsize[0] / defaultpixsize);
				float dy = (ProjectionMatrix[3][3] == 0.0) ? (nsize[1] / (nloc.z * defaultpixsize)) : (nsize[1] / defaultpixsize);

				dx = max(abs(dx), 3.0);
				dy = max(abs(dy), 3.0);

				vec2 coord = vec2(dx * floor(uv.x / dx), dy * floor(uv.y / dy));

				float stroke_depth = texelFetch(strokeDepth, ivec2(coord), 0).r;
				vec4 outcolor = texelFetch(strokeColor, ivec2(coord), 0);

				if (uselines == 1) {
				float difx = uv.x - (floor(uv.x / nsize[0]) * nsize[0]);
				if ((difx == 0.5) && (outcolor.a > 0)) {
				outcolor = color;
				}
				float dify = uv.y - (floor(uv.y / nsize[1]) * nsize[1]);
				if ((dify == 0.5) && (outcolor.a > 0)) {
				outcolor = color;
				}
				}
				gl_FragDepth = stroke_depth;
				FragColor = outcolor;
				}