Differential D2440 Diff 8085 source/blender/gpu/shaders/gpu_shader_image_interlace_frag.glsl

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				/* Keep these in sync with GPU_shader.h */
				#define INTERLACE_ROW 0
				#define INTERLACE_COLUMN 1
				#define INTERLACE_CHECKERBOARD 2

				#if __VERSION__ == 120
				varying vec2 texCoord_interp;
				#define fragColor gl_FragColor
				#else
				in vec2 texCoord_interp;
				out vec4 fragColor;
				#define texture2DRect texture
				#endif

				uniform int interlace_id;
				uniform sampler2DRect image_a;
				uniform sampler2DRect image_b;

				bool interlace()
				{
				#if __VERSION__ == 120
				if (interlace_id == INTERLACE_CHECKERBOARD) {
				return int(mod(gl_FragCoord.x + gl_FragCoord.y, 2)) != 0;
				}
				else if (interlace_id == INTERLACE_ROW) {
				return int(mod(gl_FragCoord.y, 2)) != 0;
				}
				else if (interlace_id == INTERLACE_COLUMN) {
				return int(mod(gl_FragCoord.x, 2)) != 0;
				}
				#else
				if (interlace_id == INTERLACE_CHECKERBOARD) {
				return (int(gl_FragCoord.x + gl_FragCoord.y) & 1) != 0;
				}
				else if (interlace_id == INTERLACE_ROW) {
				return (int(gl_FragCoord.y) & 1) != 0;
				}
				else if (interlace_id == INTERLACE_COLUMN) {
				return (int(gl_FragCoord.x) & 1) != 0;
				}
				#endif
				}

				void main()
				{
				if (interlace()) {
				fragColor = texture2DRect(image_a, texCoord_interp);
				} else {
				fragColor = texture2DRect(image_b, texCoord_interp);
				}
				}